/* ── CyberLearn — Styles partagés ──────────────────────────── */
:root {
  --bg:          #0d0d0d;
  --surface:     rgba(255,255,255,0.03);
  --surface-h:   rgba(255,255,255,0.06);
  --border:      rgba(119,255,136,0.12);
  --border-h:    rgba(119,255,136,0.35);
  --accent:      #77ff88;
  --accent-dim:  rgba(119,255,136,0.35);
  --text:        rgba(255,255,255,0.82);
  --text-dim:    rgba(255,255,255,0.38);
  --text-bright: #fff;
  --danger:      rgba(255,90,90,0.85);
  --warn:        rgba(255,200,50,0.85);
  --info:        rgba(100,180,255,0.85);
  --font:        "Fira Code", monospace;
  --radius:      2px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.65;
}
body::before {
  content: "";
  position: fixed; inset: 0;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,.07) 2px, rgba(0,0,0,.07) 4px);
  pointer-events: none;
  z-index: 9999;
}

/* ── Navigation ─────────────────────────────────── */
.learn-nav {
  position: sticky; top: 0; z-index: 100;
  padding: .7em 1.5em;
  background: rgba(10,10,10,.96);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 1.4em;
  backdrop-filter: blur(8px);
}
.learn-nav-logo {
  font-size: .85rem; letter-spacing: .3em; color: var(--accent);
  text-decoration: none; text-transform: uppercase; white-space: nowrap;
}
.learn-nav-sep { color: var(--text-dim); font-size: .7em; }
.learn-nav-spacer { flex: 1; }
.learn-nav-link {
  font-size: .72rem; letter-spacing: .14em; color: var(--text-dim);
  text-decoration: none; text-transform: uppercase; white-space: nowrap;
  transition: color .2s;
}
.learn-nav-link:hover { color: var(--text); }
.learn-nav-link.active { color: var(--accent); }
.learn-nav-user {
  display: flex; align-items: center; gap: .6em;
}
.learn-nav-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  border: 1px solid var(--border-h); object-fit: cover;
  background: var(--surface);
}
.learn-nav-username {
  font-size: .72rem; color: var(--accent); letter-spacing: .1em;
}

/* ── Layout ─────────────────────────────────────── */
.learn-container {
  max-width: 960px; margin: 0 auto;
  padding: 2em 1.5em 4em;
}

/* ── Cards ──────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  padding: 1.4em; border-radius: var(--radius);
  transition: border-color .2s, background .2s;
}
a.card, .card-link {
  text-decoration: none; color: inherit; display: block;
  cursor: pointer;
}
a.card:hover, .card-link:hover {
  border-color: var(--border-h); background: var(--surface-h);
}
.card-tag {
  font-size: .68rem; letter-spacing: .15em;
  margin-bottom: .5em;
}
.card-title {
  font-size: .95rem; letter-spacing: .08em; color: var(--text-bright);
  margin-bottom: .35em;
}
.card-desc {
  font-size: .78rem; color: var(--text-dim); line-height: 1.6;
}

/* ── Grid ───────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 1em; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 1em; }

/* ── Progress ───────────────────────────────────── */
.pbar-wrap { margin-top: .8em; }
.pbar-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .68rem; color: var(--text-dim); letter-spacing: .1em; margin-bottom: .35em;
}
.pbar-label .pct { color: var(--accent); font-size: .8rem; }
.pbar {
  height: 3px; background: rgba(255,255,255,.08); border-radius: 2px; overflow: hidden;
}
.pbar-fill {
  height: 100%; border-radius: 2px;
  transition: width .6s ease;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
}

/* Big progress on dashboard */
.progress-ring {
  display: flex; flex-direction: column; align-items: center; gap: .3em;
}
.progress-big { font-size: 2rem; color: var(--accent); letter-spacing: .05em; }
.progress-label { font-size: .7rem; color: var(--text-dim); letter-spacing: .15em; text-transform: uppercase; }

/* ── Stats row ──────────────────────────────────── */
.stats-row { display: flex; gap: 1.5em; flex-wrap: wrap; margin: 1.5em 0; }
.stat-item { display: flex; flex-direction: column; gap: .2em; }
.stat-value { font-size: 1.4rem; color: var(--accent); }
.stat-label { font-size: .67rem; color: var(--text-dim); letter-spacing: .12em; text-transform: uppercase; }

/* ── Buttons ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .6em 1.3em;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-dim); font-family: var(--font); font-size: .75rem;
  letter-spacing: .14em; text-transform: uppercase;
  cursor: pointer; transition: all .2s; border-radius: var(--radius);
  text-decoration: none;
}
.btn:hover { border-color: var(--accent-dim); color: var(--accent); background: rgba(119,255,136,.04); }
.btn-primary { border-color: var(--accent-dim); color: var(--accent); }
.btn-primary:hover { background: rgba(119,255,136,.1); }
.btn-danger { border-color: rgba(255,90,90,.35); color: rgba(255,90,90,.7); }
.btn-danger:hover { background: rgba(255,90,90,.08); border-color: rgba(255,90,90,.6); color: var(--danger); }
.btn-sm { padding: .4em .9em; font-size: .68rem; }
.btn:disabled { opacity: .35; cursor: not-allowed; }

/* ── Badges ─────────────────────────────────────── */
.badge-grid { display: flex; flex-wrap: wrap; gap: .6em; }
.badge-chip {
  display: inline-flex; align-items: center; gap: .4em;
  padding: .35em .75em;
  border: 1px solid currentColor; border-radius: 20px;
  font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  white-space: nowrap;
}
.badge-chip.locked { opacity: .2; border-color: var(--text-dim); color: var(--text-dim); }

/* ── Alerts ─────────────────────────────────────── */
.alert {
  padding: .8em 1.2em; font-size: .78rem; letter-spacing: .05em;
  border-left: 3px solid; margin-bottom: 1.2em; border-radius: var(--radius);
}
.alert-success { border-color: var(--accent); background: rgba(119,255,136,.06); color: var(--accent); }
.alert-error   { border-color: var(--danger); background: rgba(255,90,90,.06);   color: var(--danger); }
.alert-info    { border-color: var(--info);   background: rgba(100,180,255,.06); color: var(--info); }
.alert-warn    { border-color: var(--warn);   background: rgba(255,200,50,.06);  color: var(--warn); }

/* ── Forms ──────────────────────────────────────── */
.form-group { margin-bottom: 1.4em; }
.form-label {
  display: block; font-size: .7rem; color: var(--text-dim);
  letter-spacing: .15em; text-transform: uppercase; margin-bottom: .45em;
}
.form-input, .form-textarea, .form-select {
  width: 100%; padding: .65em 1em;
  background: rgba(255,255,255,.03); border: 1px solid var(--border);
  color: var(--text); font-family: var(--font); font-size: .85rem;
  outline: none; border-radius: var(--radius); transition: border-color .2s;
}
.form-input:focus, .form-textarea:focus, .form-select:focus { border-color: var(--accent-dim); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-hint { font-size: .68rem; color: var(--text-dim); margin-top: .35em; letter-spacing: .05em; }

/* ── Tabs ───────────────────────────────────────── */
.tabs {
  display: flex; border-bottom: 1px solid var(--border); margin-bottom: 1.8em; gap: 0;
}
.tab {
  padding: .7em 1.5em; cursor: pointer; font-size: .75rem; letter-spacing: .15em;
  color: var(--text-dim); border-bottom: 2px solid transparent; transition: all .2s;
  text-transform: uppercase; user-select: none;
  background: transparent; border-top: none; border-left: none; border-right: none;
  font-family: var(--font); white-space: nowrap;
}
.tab:hover  { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel  { display: none; }
.tab-panel.active { display: block; }

/* ── Lesson status icons ────────────────────────── */
.status-dot {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; border-radius: 50%;
  font-size: .6rem; border: 1px solid;
}
.status-done   { border-color: var(--accent); color: var(--accent); background: rgba(119,255,136,.1); }
.status-partial{ border-color: var(--warn);   color: var(--warn);   background: rgba(255,200,50,.1); }
.status-none   { border-color: var(--border-h); color: var(--text-dim); }

/* ── Quiz ───────────────────────────────────────── */
.quiz-question { margin-bottom: 1.8em; padding-bottom: 1.8em; border-bottom: 1px solid var(--border); }
.quiz-question:last-child { border-bottom: none; }
.quiz-q-text { font-size: .88rem; color: var(--text-bright); margin-bottom: .9em; line-height: 1.5; }
.quiz-q-num  { font-size: .68rem; color: var(--text-dim); letter-spacing: .12em; margin-bottom: .35em; }
.quiz-option {
  display: flex; align-items: center; gap: .7em;
  padding: .55em .9em; margin-bottom: .4em;
  border: 1px solid var(--border); cursor: pointer;
  transition: all .2s; border-radius: var(--radius);
  font-size: .82rem; color: var(--text-dim);
}
.quiz-option:hover { border-color: var(--accent-dim); color: var(--text); background: var(--surface); }
.quiz-option input[type=radio] { accent-color: var(--accent); width: 14px; height: 14px; }
.quiz-option.correct   { border-color: var(--accent); color: var(--accent); background: rgba(119,255,136,.08); }
.quiz-option.incorrect { border-color: var(--danger); color: var(--danger); background: rgba(255,90,90,.08); }
.quiz-fill input { width: 100%; }
.quiz-result { margin-top: .7em; font-size: .78rem; }
.quiz-explanation { font-size: .76rem; color: var(--text-dim); margin-top: .5em; font-style: italic; }
.quiz-score-box {
  padding: 1.2em 1.5em; border: 1px solid var(--border-h);
  background: var(--surface); text-align: center; margin-top: 1.5em;
}
.quiz-score-big { font-size: 2.5rem; color: var(--accent); }
.quiz-score-label { font-size: .75rem; color: var(--text-dim); letter-spacing: .15em; margin-top: .3em; }

/* ── Practical ──────────────────────────────────── */
.practical-box { padding: 1.5em; border: 1px solid var(--border); background: var(--surface); }
.practical-title { font-size: .8rem; color: var(--accent); letter-spacing: .15em; text-transform: uppercase; margin-bottom: .8em; display: flex; align-items: center; gap: .5em; flex-wrap: wrap; }
.practical-desc { font-size: .85rem; color: var(--text); margin-bottom: 1em; line-height: 1.6; }
.practical-hint { font-size: .75rem; color: var(--text-dim); margin-bottom: 1em; font-style: italic; }

/* ── Code lang badge ────────────────────────────── */
.code-lang-badge {
  font-size: .65rem; padding: .15em .5em;
  border: 1px solid var(--accent-dim); color: var(--accent-dim);
  letter-spacing: .1em; font-family: var(--font);
}

/* ── Code exercise layout ───────────────────────── */
.code-exercise { display: flex; flex-direction: column; gap: .8em; }

.code-panel { display: flex; flex-direction: column; gap: .3em; }

.code-panel-label {
  font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-dim);
}
.code-panel-label-bar {
  display: flex; align-items: center; justify-content: space-between;
  font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-dim);
}

.code-editor {
  width: 100%; min-height: 160px;
  background: rgba(0,0,0,.6); color: rgba(255,255,255,.85);
  border: 1px solid var(--border); border-left: 3px solid var(--accent-dim);
  font-family: 'Fira Code', var(--font); font-size: .8rem; line-height: 1.7;
  padding: .9em 1em; resize: vertical; outline: none;
  tab-size: 2; box-sizing: border-box;
  transition: border-color .2s;
}
.code-editor:focus { border-color: var(--accent); }

.code-output {
  font-family: 'Fira Code', var(--font); font-size: .79rem; line-height: 1.6;
  padding: .8em 1em; margin: 0; white-space: pre-wrap; word-break: break-word;
  border: 1px solid var(--border); min-height: 2.5em;
}
.code-output-expected {
  background: rgba(119,255,136,.04); border-color: rgba(119,255,136,.2);
  color: rgba(119,255,136,.8);
}
.code-output-actual {
  background: rgba(0,0,0,.5); color: rgba(255,255,255,.7);
}
.code-output-error {
  color: var(--danger); border-color: rgba(255,80,80,.3);
  background: rgba(255,60,60,.05);
}

.code-actions { display: flex; gap: .6em; flex-wrap: wrap; }

.btn-code-run {
  background: transparent; color: var(--accent); border: 1px solid var(--accent);
  padding: .45em 1em; font-family: var(--font); font-size: .78rem;
  letter-spacing: .1em; cursor: pointer; transition: background .15s;
}
.btn-code-run:hover { background: rgba(119,255,136,.1); }

.btn-code-reset {
  background: transparent; color: var(--text-dim); border: 1px solid var(--border);
  padding: .2em .6em; font-family: var(--font); font-size: .68rem;
  letter-spacing: .08em; cursor: pointer; transition: color .15s;
}
.btn-code-reset:hover { color: var(--text); }

/* ── Feedback diff panel ─────────────────────────── */
.fb-panel {
  margin-top: .8em; font-size: .8rem;
  border: 1px solid rgba(255,90,90,.3); background: rgba(255,60,60,.03);
  border-radius: var(--radius); overflow: hidden;
}
.fb-header {
  padding: .6em 1em; background: rgba(255,90,90,.08);
  color: var(--danger); font-size: .75rem; letter-spacing: .08em;
  border-bottom: 1px solid rgba(255,90,90,.2);
}
.fb-diff { width: 100%; }
.fb-diff-head {
  display: grid; grid-template-columns: 1fr 1fr;
  padding: .35em 1em; font-size: .65rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--text-dim);
  border-bottom: 1px solid rgba(255,255,255,.05);
}
.fb-row {
  display: grid; grid-template-columns: 1fr 1fr;
  padding: .3em 1em; border-bottom: 1px solid rgba(255,255,255,.03);
  font-family: 'Fira Code', monospace; word-break: break-all;
}
.fb-row.fb-ok { background: rgba(119,255,136,.03); }
.fb-row.fb-ok span { color: rgba(119,255,136,.5); }
.fb-row.fb-bad { background: rgba(255,90,90,.04); }
.fb-row.fb-bad span:first-child { color: rgba(255,255,255,.5); }
.fb-row.fb-bad span:last-child  { color: var(--danger); }
.fb-col-empty { color: var(--text-dim) !important; font-style: italic; }
.diff-missing {
  background: rgba(255,200,50,.18); color: #ffc832;
  border-bottom: 1px dashed #ffc832; border-radius: 1px;
}
.diff-wrong {
  background: rgba(255,90,90,.2); color: #ff6060;
  border-bottom: 1px solid #ff6060; border-radius: 1px;
}
.diff-case  { background: rgba(100,180,255,.15); color: #64b4ff; }
.diff-space { background: rgba(255,200,50,.15);  color: #ffc832; }
.fb-hints {
  padding: .7em 1em; display: flex; flex-direction: column; gap: .4em;
  border-top: 1px solid rgba(255,255,255,.05);
}
.fb-hint {
  font-size: .75rem; color: rgba(255,200,50,.9);
  line-height: 1.5; padding-left: .2em;
}
.fb-hint code {
  background: rgba(255,255,255,.07); padding: .1em .3em;
  border-radius: 2px; color: #fff; font-family: 'Fira Code', monospace;
}
.fb-error-panel {
  margin-top: .8em; padding: .8em 1em; font-size: .78rem;
  border: 1px solid rgba(255,90,90,.4); background: rgba(255,60,60,.05);
  color: var(--danger); border-radius: var(--radius);
}
.fb-error-type { font-size: .65rem; letter-spacing: .1em; opacity: .7; margin-bottom: .3em; }
.fb-error-msg  { margin-bottom: .5em; }
.fb-error-tip  { font-size: .72rem; color: rgba(255,200,50,.85); margin-top: .4em; }

/* ── Theory ─────────────────────────────────────── */
.theory-content h3 {
  font-size: .88rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent); margin: 1.5em 0 .7em; border-left: 2px solid var(--accent);
  padding-left: .7em;
}
.theory-content p { font-size: .84rem; margin-bottom: .9em; line-height: 1.7; }
.theory-content ul, .theory-content ol { padding-left: 1.5em; margin-bottom: .9em; }
.theory-content li { font-size: .84rem; margin-bottom: .35em; line-height: 1.6; }
.theory-content code {
  font-family: var(--font); font-size: .82em;
  background: rgba(119,255,136,.08); color: var(--accent);
  padding: .1em .4em; border-radius: 2px;
}
.theory-content pre.theory-code, .theory-content pre {
  font-family: var(--font); font-size: .79rem; line-height: 1.7;
  background: rgba(0,0,0,.5); border: 1px solid var(--border);
  border-left: 3px solid var(--accent-dim);
  padding: 1em 1.2em; overflow-x: auto; margin: .8em 0 1.2em;
  color: rgba(255,255,255,.75);
}
/* Mini-schémas pédagogiques (boîtes/variables, dict clé→valeur) */
.diagram { display:flex; flex-wrap:wrap; gap:.7em; margin:.4em 0 1.3em; }
.diag-box { display:flex; flex-direction:column; min-width:74px; border:1px solid var(--accent-dim);
  border-radius:8px; overflow:hidden; text-align:center; background:rgba(0,0,0,.25); }
.diag-label { font-size:.68rem; letter-spacing:.05em; color:var(--accent); background:rgba(119,255,136,.1);
  padding:.25em .5em; border-bottom:1px solid var(--accent-dim); }
.diag-val { font-family:var(--font); font-size:.82rem; color:var(--text-bright); padding:.5em .6em; }
.diagram-map { flex-direction:column; gap:.4em; }
.diag-row { display:flex; align-items:center; gap:.6em; font-family:var(--font); font-size:.82rem; }
.diag-key { color:var(--accent); min-width:80px; text-align:right; }
.diag-arrow { color:var(--text-dim); }
.diag-rowval { color:var(--text-bright); }
.diag-caption { font-size:.72rem; color:var(--text-dim); margin:-.9em 0 1.3em; font-style:italic; }

.theory-table {
  width: 100%; border-collapse: collapse; margin: .8em 0 1.2em; font-size: .79rem;
}
.theory-table th {
  padding: .55em .9em; background: rgba(119,255,136,.07); color: var(--accent);
  border: 1px solid var(--border); letter-spacing: .1em; text-align: left;
  text-transform: uppercase; font-size: .72rem;
}
.theory-table td { padding: .5em .9em; border: 1px solid var(--border); color: var(--text); }
.theory-table tr:hover td { background: var(--surface-h); }
.theory-note {
  padding: .8em 1em; border-left: 3px solid var(--accent-dim);
  background: rgba(119,255,136,.04); font-size: .79rem;
  color: var(--text-dim); margin: .8em 0 1em; line-height: 1.6;
}

/* ── Leaderboard ────────────────────────────────── */
.lb-table { width: 100%; border-collapse: collapse; }
.lb-table th {
  padding: .6em 1em; font-size: .68rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--text-dim); border-bottom: 1px solid var(--border); text-align: left;
}
.lb-table td { padding: .7em 1em; border-bottom: 1px solid rgba(255,255,255,.04); font-size: .82rem; }
.lb-table tr:hover td { background: var(--surface-h); }
.lb-table tr.me td { background: rgba(119,255,136,.05); }
.lb-rank { font-size: .9rem; color: var(--text-dim); font-weight: 600; }
.lb-rank.gold   { color: #ffd700; }
.lb-rank.silver { color: #c0c0c0; }
.lb-rank.bronze { color: #cd7f32; }
.lb-user { display: flex; align-items: center; gap: .7em; }
.lb-avatar { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; border: 1px solid var(--border-h); }

/* ── Tuteur IA ──────────────────────────────────── */
.tutor-fab {
  position: fixed; bottom: 1.3em; right: 1.3em; z-index: 800;
  display: flex; align-items: center; gap: .5em; cursor: pointer;
  padding: .7em 1.1em; background: #0d0d0d; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 40px;
  font-family: var(--font); font-size: .78rem; letter-spacing: .06em;
  box-shadow: 0 4px 22px rgba(0,0,0,.6); transition: background .15s, transform .15s;
}
.tutor-fab:hover { background: rgba(119,255,136,.1); transform: translateY(-2px); }
.tutor-panel {
  position: fixed; bottom: 0; right: 0; z-index: 900;
  width: min(420px, 100%); height: min(640px, 88vh);
  display: none; flex-direction: column;
  background: #0b0b0b; border: 1px solid var(--border-h);
  box-shadow: -6px 0 40px rgba(0,0,0,.7);
}
.tutor-panel.open { display: flex; }
.tutor-head {
  display: flex; align-items: center; gap: .6em; padding: .8em 1em;
  border-bottom: 1px solid var(--border); background: rgba(119,255,136,.05);
}
.tutor-head-title { font-size: .82rem; color: var(--accent); letter-spacing: .08em; flex: 1; }
.tutor-close { cursor: pointer; color: var(--text-dim); font-size: 1.1rem; background: none; border: none; }
.tutor-close:hover { color: var(--text-bright); }
.tutor-quick { display: flex; gap: .5em; flex-wrap: wrap; padding: .7em 1em; border-bottom: 1px solid rgba(255,255,255,.05); }
.tutor-chip {
  cursor: pointer; padding: .4em .7em; font-size: .7rem; letter-spacing: .04em;
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 3px; font-family: var(--font); transition: border-color .15s, color .15s;
}
.tutor-chip:hover { border-color: var(--accent-dim); color: var(--accent); }
.tutor-body { flex: 1; overflow-y: auto; padding: 1em; display: flex; flex-direction: column; gap: .9em; }
.tutor-msg { font-size: .82rem; line-height: 1.6; }
.tutor-msg.user { color: var(--text); align-self: flex-end; max-width: 85%;
  background: rgba(119,255,136,.07); border: 1px solid var(--border); padding: .5em .8em; border-radius: 8px 8px 2px 8px; }
.tutor-msg.bot { color: rgba(255,255,255,.85); align-self: flex-start; max-width: 95%;
  background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.07); padding: .7em .9em; border-radius: 8px 8px 8px 2px; }
.tutor-msg.bot code { background: rgba(119,255,136,.1); color: var(--accent); padding: .05em .35em; border-radius: 2px; font-size: .82em; }
.tutor-msg.bot pre {
  background: rgba(0,0,0,.55); border: 1px solid var(--border); border-left: 3px solid var(--accent-dim);
  padding: .7em .9em; margin: .5em 0; overflow-x: auto; font-size: .76rem; line-height: 1.55; color: rgba(255,255,255,.8);
}
.tutor-msg.bot strong { color: #fff; }
.tutor-msg.bot ul { padding-left: 1.3em; margin: .4em 0; }
.tutor-hint { font-size: .74rem; color: var(--text-dim); line-height: 1.6; }
.tutor-foot { display: flex; gap: .5em; padding: .8em; border-top: 1px solid var(--border); }
.tutor-input {
  flex: 1; background: rgba(0,0,0,.5); color: var(--text); resize: none;
  border: 1px solid var(--border); padding: .6em .7em; font-family: var(--font);
  font-size: .8rem; line-height: 1.4; outline: none; min-height: 2.6em; max-height: 7em;
}
.tutor-input:focus { border-color: var(--accent-dim); }
.tutor-send {
  cursor: pointer; padding: 0 1em; background: transparent; color: var(--accent);
  border: 1px solid var(--accent); font-family: var(--font); font-size: .8rem;
}
.tutor-send:hover { background: rgba(119,255,136,.1); }
.tutor-send:disabled { opacity: .4; cursor: not-allowed; }
.tutor-typing { font-size: .76rem; color: var(--text-dim); font-style: italic; }
.btn-ai-why {
  margin-top: .5em; cursor: pointer; padding: .3em .7em; font-size: .7rem;
  background: transparent; color: var(--info); border: 1px solid rgba(100,180,255,.4);
  border-radius: 3px; font-family: var(--font);
}
.btn-ai-why:hover { background: rgba(100,180,255,.08); }

/* ── Auth pages ─────────────────────────────────── */
.auth-wrap {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; padding: 2em 1em;
}
.auth-box {
  width: min(400px, 100%); padding: 2.5em 2em;
  background: var(--surface); border: 1px solid var(--border);
}
.auth-title {
  font-size: 1.1rem; letter-spacing: .3em; color: var(--accent);
  text-transform: uppercase; margin-bottom: .3em;
}
.auth-sub { font-size: .72rem; color: var(--text-dim); letter-spacing: .1em; margin-bottom: 2em; }
.auth-footer { margin-top: 1.5em; font-size: .75rem; color: var(--text-dim); text-align: center; }
.auth-footer a { color: var(--accent); text-decoration: none; }
.remember-me {
  display: flex; align-items: flex-start; gap: .65em; margin: -.3em 0 1.5em; cursor: pointer;
  font-size: .8rem; color: var(--text); line-height: 1.45;
}
.remember-me input { flex: 0 0 auto; width: 1.1em; height: 1.1em; margin-top: .1em; accent-color: var(--accent); cursor: pointer; }
.remember-me small { display: block; margin-top: .2em; font-size: .68rem; color: var(--text-dim); letter-spacing: .03em; }

/* ── Profile ────────────────────────────────────── */
.profile-avatar-wrap { position: relative; width: 80px; height: 80px; }
.profile-avatar {
  width: 80px; height: 80px; border-radius: 50%;
  object-fit: cover; border: 2px solid var(--border-h);
}
.profile-avatar-edit {
  position: absolute; bottom: 0; right: 0;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--border-h);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: .7em;
}
.profile-header { display: flex; align-items: center; gap: 1.5em; margin-bottom: 2em; }
.profile-info h2 { font-size: 1.1rem; color: var(--text-bright); letter-spacing: .08em; }
.profile-info .level { font-size: .75rem; color: var(--accent); letter-spacing: .15em; margin-top: .2em; }

/* ── Page header ────────────────────────────────── */
.page-header { margin-bottom: 2em; padding-bottom: 1em; border-bottom: 1px solid var(--border); }
.page-title  { font-size: 1.1rem; letter-spacing: .2em; text-transform: uppercase; margin-bottom: .3em; }
.page-crumb  { font-size: .72rem; color: var(--text-dim); letter-spacing: .1em; }
.page-crumb a{ color: var(--text-dim); text-decoration: none; }
.page-crumb a:hover { color: var(--text); }

/* ── Lesson list item ───────────────────────────── */
.lesson-item {
  display: flex; align-items: center; gap: 1em;
  padding: .9em 1.1em; border: 1px solid var(--border);
  background: var(--surface); margin-bottom: .5em;
  text-decoration: none; color: inherit; transition: all .2s;
}
.lesson-item:hover { border-color: var(--border-h); background: var(--surface-h); }
.lesson-item-title { flex: 1; font-size: .84rem; letter-spacing: .06em; }
.lesson-item-meta  { display: flex; gap: .8em; align-items: center; }
.lesson-badge-done { font-size: .68rem; color: var(--accent); letter-spacing: .08em; }
.lesson-badge-none { font-size: .68rem; color: var(--text-dim); letter-spacing: .08em; }

/* ── Misc ───────────────────────────────────────── */
.sep { height: 1px; background: var(--border); margin: 1.5em 0; }
.text-dim    { color: var(--text-dim); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }
.text-right  { text-align: right; }
.mt1 { margin-top: .8em; }
.mt2 { margin-top: 1.5em; }
.mt3 { margin-top: 2.5em; }
.mb1 { margin-bottom: .8em; }
.mb2 { margin-bottom: 1.5em; }
.flex-center { display: flex; align-items: center; gap: .7em; }
.section-color-tag {
  display: inline-block; padding: .2em .65em;
  font-size: .68rem; letter-spacing: .15em; border: 1px solid currentColor;
  text-transform: uppercase;
}

@media (max-width: 600px) {
  .learn-nav { flex-wrap: wrap; gap: .8em; }
  .learn-nav-spacer { display: none; }
  .stats-row { gap: 1em; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   REFONTE 17/10/2026 — parcours guidé, thème clair/sombre, leçons visuelles.
   Tout ce qui suit SURCHARGE l'existant (les règles plus bas gagnent) : le
   thème sombre d'origine reste la base, le clair s'active par
   <html data-theme="light"> (posé par _head.php avant l'affichage).
   ═══════════════════════════════════════════════════════════════════════════ */
:root {
  color-scheme: dark;
  --font-prose: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow: 0 2px 6px rgba(0,0,0,.25), 0 10px 30px rgba(0,0,0,.25);
  --code-bg: rgba(0,0,0,.5);
  --code-text: rgba(255,255,255,.85);
  --sc: var(--accent);
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg:          #f3f5f8;
  --surface:     #ffffff;
  --surface-h:   #f5f7fa;
  --border:      rgba(31,35,40,.13);
  --border-h:    rgba(26,127,55,.45);
  --accent:      #1a7f37;
  --accent-dim:  rgba(26,127,55,.35);
  --text:        #2b3138;
  --text-dim:    #5b6670;
  --text-bright: #0d1117;
  --danger:      #c7222e;
  --warn:        #9a6700;
  --info:        #0969da;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 6px 22px rgba(0,0,0,.07);
  --code-bg: #f6f8fa;
  --code-text: #24292f;
}
/* Couleur de la section : posée en ligne (style="--sc:#…"). En clair, le texte
   coloré est assombri automatiquement (les pastels néon sont illisibles sur blanc). */
[style*="--sc:"] { --sc-ink: var(--sc); }
:root[data-theme="light"] [style*="--sc:"] { --sc-ink: color-mix(in srgb, var(--sc) 55%, #000); }

/* ── Thème clair : composants qui avaient des fonds sombres en dur ─────── */
:root[data-theme="light"] body::before { display: none; }
:root[data-theme="light"] .learn-nav { background: rgba(255,255,255,.93); }
:root[data-theme="light"] .code-editor,
:root[data-theme="light"] .code-output-actual,
:root[data-theme="light"] .theory-content pre.theory-code,
:root[data-theme="light"] .theory-content pre,
:root[data-theme="light"] .tutor-msg.bot pre,
:root[data-theme="light"] .tutor-input,
:root[data-theme="light"] .diag-box { background: var(--code-bg); color: var(--code-text); }
:root[data-theme="light"] .tutor-fab { background: var(--surface); box-shadow: var(--shadow); }
:root[data-theme="light"] .tutor-panel { background: var(--surface); box-shadow: -6px 0 30px rgba(0,0,0,.12); }
:root[data-theme="light"] .tutor-msg.bot { color: var(--text); background: var(--surface-h); border-color: var(--border); }
:root[data-theme="light"] .code-output-expected { color: var(--accent); background: var(--code-bg); }
:root[data-theme="light"] .lb-table td { border-bottom-color: var(--border); }
:root[data-theme="light"] .card, :root[data-theme="light"] .lesson-item,
:root[data-theme="light"] .practical-box, :root[data-theme="light"] .auth-box { box-shadow: var(--shadow); }

/* ── Bouton de thème ──────────────────────────────────────────────────── */
.theme-toggle {
  cursor: pointer; flex: 0 0 auto; width: 34px; height: 34px; border-radius: 999px;
  display: grid; place-items: center; font-size: 1rem; line-height: 1;
  background: transparent; color: var(--text); border: 1px solid var(--border-h);
  transition: background .2s, transform .2s;
}
.theme-toggle:hover { background: var(--surface-h); transform: rotate(-12deg); }
.theme-toggle.floating { position: fixed; top: 1rem; right: 1rem; z-index: 1000; }

/* ── Mise en page large (utiliser l'écran) ────────────────────────────── */
.learn-wide { max-width: 1480px; margin: 0 auto; padding: 1.6rem clamp(1rem, 2.5vw, 2.2rem) 5rem; }
.crumb { font-family: var(--font-prose); font-size: .86rem; color: var(--text-dim); margin-bottom: 1rem; }
.crumb a { color: var(--text-dim); text-decoration: none; }
.crumb a:hover { color: var(--text-bright); text-decoration: underline; }

/* Puces, difficulté */
.chip {
  display: inline-flex; align-items: center; gap: .35rem; padding: .28rem .72rem;
  border-radius: 999px; border: 1px solid var(--border); background: var(--surface);
  font-family: var(--font-prose); font-size: .8rem; color: var(--text); white-space: nowrap;
}
.chip-sc { color: var(--sc-ink); border-color: color-mix(in srgb, var(--sc) 45%, transparent);
  background: color-mix(in srgb, var(--sc) 12%, transparent); font-weight: 600; }
.diff {
  display: inline-flex; align-items: center; gap: .45rem; padding: .26rem .7rem; border-radius: 999px;
  font-family: var(--font-prose); font-size: .8rem; font-weight: 700; white-space: nowrap;
  color: var(--d); background: color-mix(in srgb, var(--d) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--d) 42%, transparent);
}
:root[data-theme="light"] .diff { color: color-mix(in srgb, var(--d) 62%, #000); }
.diff-dots { display: inline-flex; gap: 3px; }
.diff-dots i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: .22; }
.diff-dots i.on { opacity: 1; }

/* Gros bouton d'action */
.btn-cta {
  display: inline-flex; align-items: center; gap: .55rem; padding: .85rem 1.5rem; border-radius: 12px;
  background: var(--accent); color: #04130a; border: 1px solid var(--accent); cursor: pointer;
  font-family: var(--font-prose); font-size: 1rem; font-weight: 700; text-decoration: none;
  transition: filter .15s, transform .15s;
}
.btn-cta:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-cta:disabled { opacity: .45; cursor: not-allowed; transform: none; filter: none; }
:root[data-theme="light"] .btn-cta { color: #fff; }
.btn-soft {
  display: inline-flex; align-items: center; gap: .5rem; padding: .7rem 1.2rem; border-radius: 12px;
  background: var(--surface); color: var(--text); border: 1px solid var(--border); cursor: pointer;
  font-family: var(--font-prose); font-size: .95rem; font-weight: 600; text-decoration: none;
}
.btn-soft:hover { border-color: var(--border-h); color: var(--text-bright); }

/* ── Leçon : barre latérale + contenu ─────────────────────────────────── */
.lesson-shell { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 2.2rem; align-items: start; }
.lesson-side {
  position: sticky; top: 70px; display: flex; flex-direction: column; gap: 1rem;
  max-height: calc(100vh - 86px); overflow: auto; padding-bottom: 1rem;
}
.side-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1rem 1.05rem; }
.side-title { font-family: var(--font); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--text-dim); margin-bottom: .7rem; }

.stepper { display: flex; flex-direction: column; gap: .5rem; }
.step {
  display: flex; align-items: center; gap: .75rem; width: 100%; text-align: left; cursor: pointer;
  padding: .65rem .75rem; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-h);
  font-family: var(--font-prose); color: var(--text); transition: border-color .15s, box-shadow .15s;
}
.step:hover { border-color: var(--border-h); }
.step-num {
  flex: 0 0 auto; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: .92rem; border: 2px solid var(--border-h); color: var(--text-bright);
}
.step-txt { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.step-label { font-weight: 700; font-size: .95rem; color: var(--text-bright); }
.step-sub { font-size: .78rem; color: var(--text-dim); }
.step.is-current { border-color: var(--sc-ink); box-shadow: 0 0 0 3px color-mix(in srgb, var(--sc) 22%, transparent); background: var(--surface); }
.step.is-done .step-num { background: var(--accent); border-color: var(--accent); color: #04130a; }
:root[data-theme="light"] .step.is-done .step-num { color: #fff; }
.step.is-locked { opacity: .55; cursor: not-allowed; }
.step.is-locked .step-num { border-style: dashed; }

.toc { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .15rem; }
.toc a {
  display: block; padding: .38rem .6rem; border-radius: 8px; border-left: 3px solid transparent;
  font-family: var(--font-prose); font-size: .86rem; color: var(--text-dim); text-decoration: none; line-height: 1.35;
}
.toc a:hover { color: var(--text-bright); background: var(--surface-h); }
.toc a.on { color: var(--sc-ink); border-left-color: var(--sc-ink); background: color-mix(in srgb, var(--sc) 9%, transparent); font-weight: 600; }

.prereq-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .45rem; }
.prereq-list li { display: flex; gap: .55rem; align-items: flex-start; font-family: var(--font-prose); font-size: .86rem; line-height: 1.35; }
.prereq-list .ok { color: var(--accent); } .prereq-list .ko { color: var(--warn); }
.prereq-list a { color: var(--text-bright); }

.lesson-hero {
  padding: clamp(1.2rem, 2.4vw, 2rem) clamp(1.2rem, 2.6vw, 2.2rem); border-radius: 20px; margin-bottom: 1.6rem;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, color-mix(in srgb, var(--sc) 16%, var(--surface)), var(--surface) 62%);
}
.lesson-hero h1 {
  font-family: var(--font-prose); font-size: clamp(1.55rem, 2.6vw, 2.35rem); line-height: 1.2;
  letter-spacing: -.01em; color: var(--text-bright); margin: .5rem 0 .9rem; text-transform: none;
}
.hero-meta { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }

.step-panel { display: none; }
.step-panel.active { display: block; animation: fadeIn .25s ease; }
.panel-card { background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: clamp(1.2rem, 2.6vw, 2.4rem); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.panel-head h2 { font-family: var(--font-prose); font-size: 1.35rem; color: var(--text-bright); text-transform: none; letter-spacing: 0; }
.panel-sub { font-family: var(--font-prose); font-size: .95rem; color: var(--text-dim); margin-top: .2rem; }

.gate {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; padding: 1.2rem 1.4rem;
  border-radius: 16px; border: 1px dashed var(--border-h); background: color-mix(in srgb, var(--accent) 6%, transparent);
}
.gate-txt { flex: 1; min-width: 220px; font-family: var(--font-prose); font-size: .95rem; color: var(--text); }
.gate-txt small { display: block; color: var(--text-dim); font-size: .82rem; margin-top: .2rem; }

.done-banner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.2rem 1.5rem; border-radius: 18px; margin: 0 0 1.6rem;
  background: color-mix(in srgb, var(--accent) 13%, var(--surface)); border: 1px solid var(--accent-dim);
  font-family: var(--font-prose); color: var(--text-bright);
}
.done-banner strong { font-size: 1.1rem; }

.lock-screen {
  max-width: 820px; margin: 2rem auto; padding: clamp(1.4rem, 3vw, 2.6rem); text-align: center;
  border-radius: 22px; border: 1px solid var(--border); background: var(--surface); font-family: var(--font-prose);
}
.lock-screen .big { font-size: 3.2rem; line-height: 1; }
.lock-screen h1 { font-size: clamp(1.4rem, 2.4vw, 2rem); color: var(--text-bright); margin: .8rem 0 .4rem; text-transform: none; letter-spacing: 0; }
.lock-screen p { color: var(--text-dim); font-size: 1rem; }
.lock-list { list-style: none; padding: 0; margin: 1.6rem 0; text-align: left; display: flex; flex-direction: column; gap: .7rem; }
.lock-list li {
  display: flex; align-items: center; gap: .9rem; padding: .9rem 1.1rem; border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--border)); background: color-mix(in srgb, var(--warn) 7%, transparent);
}
.lock-list li .li-ico { font-size: 1.4rem; }
.lock-list li .li-txt { flex: 1; color: var(--text); font-size: .98rem; }
.lock-list li .li-txt small { display: block; color: var(--text-dim); font-size: .82rem; }

/* ── Théorie : lisibilité et composants visuels ────────────────────────── */
.theory-content { font-family: var(--font-prose); color: var(--text); }
.theory-content p, .theory-content li { font-size: 1.03rem; line-height: 1.78; }
.theory-content p { margin-bottom: 1.05em; }
.theory-content h3 {
  font-family: var(--font-prose); font-size: 1.42rem; line-height: 1.3; color: var(--text-bright);
  text-transform: none; letter-spacing: -.005em; margin: 2.4rem 0 1rem; padding-top: .2rem;
  scroll-margin-top: 90px; display: flex; align-items: center; gap: .6rem;
}
.theory-content h3:first-child { margin-top: 0; }
.theory-content h4 { font-family: var(--font-prose); font-size: 1.12rem; color: var(--text-bright); margin: 1.6rem 0 .6rem; }
.theory-content strong { color: var(--text-bright); }
.theory-content code { font-family: var(--font); font-size: .88em; }
.theory-content pre.theory-code, .theory-content pre {
  font-size: .88rem; line-height: 1.7; border-radius: 12px; padding: 1rem 1.2rem; overflow-x: auto;
}
.theory-content .theory-table { font-family: var(--font-prose); font-size: .95rem; border-radius: 12px; overflow: hidden; }

.t-lead {
  font-size: 1.14rem !important; line-height: 1.75 !important; color: var(--text-bright);
  padding: 1.1rem 1.35rem; margin: 0 0 1.8rem !important; border-radius: 0 14px 14px 0;
  border-left: 4px solid var(--sc-ink, var(--accent)); background: color-mix(in srgb, var(--sc) 9%, transparent);
}
.t-split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 1.8rem; align-items: start; margin: 1.2rem 0 1.8rem; }
.t-split > div > :last-child { margin-bottom: 0; }

.callout {
  display: flex; gap: .9rem; padding: 1rem 1.2rem; border-radius: 14px; margin: 1.4rem 0;
  border: 1px solid color-mix(in srgb, var(--c) 36%, transparent); background: color-mix(in srgb, var(--c) 9%, transparent);
}
.callout > .ci { font-size: 1.4rem; line-height: 1.25; flex: 0 0 auto; }
.callout > div { min-width: 0; }
.callout > div > :last-child { margin-bottom: 0 !important; }
.callout .ct { display: block; font-weight: 800; margin-bottom: .3rem; color: var(--c); font-size: 1rem; }
:root[data-theme="light"] .callout .ct { color: color-mix(in srgb, var(--c) 68%, #000); }
.callout-info  { --c: #3b82f6; }
.callout-warn  { --c: #f59e0b; }
.callout-tip   { --c: #22c55e; }
.callout-cyber { --c: #a855f7; }

.t-key {
  margin: 2rem 0 0; padding: 1.2rem 1.4rem; border-radius: 16px;
  background: color-mix(in srgb, var(--sc) 8%, var(--surface-h)); border: 1px solid color-mix(in srgb, var(--sc) 30%, var(--border));
}
.t-key .ct { display: block; font-weight: 800; font-size: 1.05rem; color: var(--sc-ink, var(--text-bright)); margin-bottom: .6rem; }
.t-key ul { margin: 0 !important; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr)); gap: .3rem 1.6rem; }

.t-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1rem; margin: 1.2rem 0 1.8rem; }
.t-card { padding: 1.05rem 1.15rem; border-radius: 14px; border: 1px solid var(--border); background: var(--surface-h); }
.t-card .ti { font-size: 1.7rem; line-height: 1; }
.t-card h5 { font-family: var(--font-prose); font-size: 1.02rem; color: var(--text-bright); margin: .55rem 0 .3rem; }
.t-card p { font-size: .94rem !important; line-height: 1.6 !important; margin: 0 !important; }

.t-flow { display: flex; flex-wrap: wrap; align-items: center; gap: .55rem; margin: 1.2rem 0 1.6rem; }
.t-flow .node {
  padding: .6rem .95rem; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-h);
  font-family: var(--font-prose); font-weight: 700; font-size: .95rem; color: var(--text-bright);
}
.t-flow .node small { display: block; font-weight: 400; font-size: .78rem; color: var(--text-dim); }
.t-flow .node.on { border-color: var(--sc-ink); background: color-mix(in srgb, var(--sc) 12%, var(--surface)); }
.t-flow .arr { color: var(--text-dim); font-size: 1.35rem; }

.t-steps { list-style: none; counter-reset: st; padding: 0 !important; margin: 1rem 0 1.6rem; display: flex; flex-direction: column; gap: .7rem; }
.t-steps > li { counter-increment: st; position: relative; padding: .8rem 1rem .8rem 3.4rem; border-radius: 12px; background: var(--surface-h); border: 1px solid var(--border); }
.t-steps > li::before {
  content: counter(st); position: absolute; left: .9rem; top: .75rem; width: 1.8rem; height: 1.8rem; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; font-size: .9rem; color: #fff; background: var(--sc-ink, var(--accent));
}

/* Tables de base de données dessinées comme dans un vrai SGBD */
.db-table {
  width: 100%; border-collapse: separate; border-spacing: 0; margin: .4rem 0 1.5rem; overflow: hidden;
  border: 1px solid var(--border); border-radius: 12px; font-family: var(--font); font-size: .86rem;
}
.db-table caption { caption-side: top; text-align: left; padding: 0 0 .5rem; font-family: var(--font-prose); font-weight: 700; font-size: .95rem; color: var(--text-bright); }
.db-table th { text-align: left; padding: .55rem .85rem; font-weight: 700; color: var(--text-bright); background: color-mix(in srgb, var(--sc) 18%, var(--surface)); }
.db-table th small { display: block; font-weight: 400; font-size: .7rem; color: var(--text-dim); }
.db-table td { padding: .5rem .85rem; border-top: 1px solid var(--border); color: var(--text); background: var(--surface); }
.db-table tr.hl td  { background: color-mix(in srgb, #22c55e 14%, var(--surface)); }
.db-table tr.del td { background: color-mix(in srgb, #ef4444 12%, var(--surface)); text-decoration: line-through; opacity: .85; }
.db-table tr.dim td { opacity: .45; }
.db-table td.null { color: var(--text-dim); font-style: italic; }
.k-pk, .k-fk { display: inline-block; margin-left: .35rem; padding: .03rem .35rem; border-radius: 4px; font-size: .64rem; font-weight: 800; vertical-align: middle; font-family: var(--font-prose); }
.k-pk { background: #f59e0b; color: #1b1300; }
.k-fk { background: #3b82f6; color: #fff; }

.db-schema {
  display: flex; flex-wrap: wrap; gap: 1.2rem; align-items: center; justify-content: center;
  padding: 1.4rem; margin: 1rem 0 1.8rem; border-radius: 16px; border: 1px dashed var(--border-h);
  background: color-mix(in srgb, var(--sc) 4%, transparent);
}
.db-entity { min-width: 200px; border: 1px solid var(--border-h); border-radius: 12px; overflow: hidden; background: var(--surface); box-shadow: var(--shadow); }
.db-entity > header { padding: .55rem .85rem; font-family: var(--font-prose); font-weight: 800; color: var(--text-bright); background: color-mix(in srgb, var(--sc) 20%, var(--surface)); }
.db-entity ul { list-style: none; margin: 0 !important; padding: .35rem 0 !important; }
.db-entity li { display: flex; justify-content: space-between; gap: 1rem; padding: .22rem .85rem; font-family: var(--font); font-size: .82rem !important; line-height: 1.5 !important; }
.db-entity li span:last-child { color: var(--text-dim); }
.db-rel { font-family: var(--font-prose); font-weight: 700; font-size: .85rem; color: var(--text-dim); text-align: center; line-height: 1.3; }
.db-rel b { display: block; font-size: 1.5rem; color: var(--sc-ink, var(--accent)); }

.join-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 1rem; margin: 1rem 0 1.8rem; }
.join-card { padding: 1rem; border-radius: 14px; border: 1px solid var(--border); background: var(--surface-h); text-align: center; }
.join-card svg { width: 100%; max-width: 170px; height: auto; display: block; margin: 0 auto .5rem; }
.join-card h5 { font-family: var(--font); font-size: .9rem; color: var(--text-bright); margin: .2rem 0; }
.join-card p { font-size: .88rem !important; line-height: 1.5 !important; margin: 0 !important; }

/* Coloration syntaxique légère (SQL…) posée par learn.js */
.tok-kw  { color: #c678dd; font-weight: 600; }
.tok-fn  { color: #61afef; }
.tok-str { color: #98c379; }
.tok-num { color: #d19a66; }
.tok-com { color: #7f848e; font-style: italic; }
:root[data-theme="light"] .tok-kw  { color: #8250df; }
:root[data-theme="light"] .tok-fn  { color: #0550ae; }
:root[data-theme="light"] .tok-str { color: #0a3069; }
:root[data-theme="light"] .tok-num { color: #953800; }
:root[data-theme="light"] .tok-com { color: #6e7781; }

/* ── Quiz et exercices ─────────────────────────────────────────────────── */
.quiz-question { background: var(--surface-h); border: 1px solid var(--border); border-radius: 16px; padding: 1.2rem 1.35rem; margin-bottom: 1rem; }
.quiz-question:last-child { border-bottom: 1px solid var(--border); }
.quiz-q-num { font-family: var(--font); }
.quiz-q-text { font-family: var(--font-prose); font-size: 1.06rem; line-height: 1.55; color: var(--text-bright); }
.quiz-option {
  display: flex; align-items: center; gap: .7rem; padding: .75rem .95rem; margin-bottom: .5rem; border-radius: 12px;
  font-family: var(--font-prose); font-size: .98rem; background: var(--surface); border: 1px solid var(--border); cursor: pointer;
}
.quiz-result, .quiz-explanation { font-family: var(--font-prose); font-size: .92rem; }
.quiz-score-box { border-radius: 16px; }
.quiz-bar { display: flex; gap: .35rem; margin: 0 0 1.2rem; }
.quiz-bar span { flex: 1; height: 6px; border-radius: 99px; background: var(--border); }
.quiz-bar span.on { background: var(--sc-ink, var(--accent)); }

.practical-box { border-radius: 16px; }
.practical-title { font-family: var(--font-prose); letter-spacing: 0; text-transform: none; font-size: 1.05rem; font-weight: 700; }
.practical-desc { font-family: var(--font-prose); font-size: 1rem; line-height: 1.7; }
.prac-tag { font-family: var(--font-prose); font-size: .74rem; font-weight: 700; padding: .15rem .55rem; border-radius: 999px; }
.prac-tag.req   { color: var(--warn);   background: color-mix(in srgb, var(--warn) 14%, transparent); border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent); }
.prac-tag.bonus { color: var(--info);   background: color-mix(in srgb, var(--info) 12%, transparent); border: 1px solid color-mix(in srgb, var(--info) 35%, transparent); }
.prac-tag.ok    { color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); border: 1px solid var(--accent-dim); }

/* ── Page section : chapitres en cartes ────────────────────────────────── */
.sec-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1.6rem; align-items: center;
  padding: clamp(1.3rem, 2.6vw, 2.2rem); margin-bottom: 1.8rem; border-radius: 22px; border: 1px solid var(--border);
  background: linear-gradient(135deg, color-mix(in srgb, var(--sc) 18%, var(--surface)), var(--surface) 64%);
}
.sec-hero h1 { font-family: var(--font-prose); font-size: clamp(1.7rem, 3vw, 2.5rem); line-height: 1.15; color: var(--text-bright); margin: .5rem 0 .6rem; text-transform: none; letter-spacing: -.01em; }
.sec-hero p { font-family: var(--font-prose); font-size: 1.02rem; line-height: 1.65; color: var(--text); max-width: 75ch; }
.ring {
  --p: 0; width: 132px; height: 132px; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--sc-ink, var(--accent)) calc(var(--p) * 1%), var(--border) 0);
}
.ring > div { width: 104px; height: 104px; border-radius: 50%; background: var(--surface); display: grid; place-items: center; text-align: center; font-family: var(--font-prose); }
.ring strong { display: block; font-size: 1.6rem; color: var(--text-bright); line-height: 1; }
.ring small { font-size: .74rem; color: var(--text-dim); }

.ch-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 1.1rem; }
.ch-card {
  position: relative; display: flex; flex-direction: column; gap: .65rem; padding: 1.2rem 1.3rem; border-radius: 18px;
  border: 1px solid var(--border); background: var(--surface); text-decoration: none; color: inherit;
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.ch-card:hover { transform: translateY(-2px); border-color: var(--sc-ink, var(--border-h)); box-shadow: var(--shadow); }
.ch-card.is-done { border-color: color-mix(in srgb, var(--accent) 55%, transparent); }
.ch-card.is-locked { background: var(--surface-h); }
.ch-card.is-locked .ch-title, .ch-card.is-locked .ch-num { opacity: .6; }
.ch-card.is-locked:hover { transform: none; box-shadow: none; }
.ch-card.is-intro { grid-column: 1 / -1; background: linear-gradient(135deg, color-mix(in srgb, var(--sc) 13%, var(--surface)), var(--surface) 70%); }
.ch-top { display: flex; align-items: center; gap: .55rem; flex-wrap: wrap; }
.ch-num { font-family: var(--font); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--sc-ink, var(--accent)); }
.ch-state { margin-left: auto; font-size: 1.15rem; }
.ch-title { font-family: var(--font-prose); font-size: 1.1rem; font-weight: 800; line-height: 1.35; color: var(--text-bright); }
.ch-steps { display: flex; gap: .4rem; flex-wrap: wrap; }
.ch-steps span {
  font-family: var(--font-prose); font-size: .78rem; padding: .2rem .6rem; border-radius: 999px;
  background: var(--surface-h); border: 1px solid var(--border); color: var(--text-dim);
}
.ch-steps span.ok { color: var(--accent); border-color: var(--accent-dim); }
.ch-lock { font-family: var(--font-prose); font-size: .86rem; line-height: 1.4; color: var(--warn); }
.ch-bar { height: 6px; border-radius: 99px; background: var(--border); overflow: hidden; margin-top: auto; }
.ch-bar > i { display: block; height: 100%; background: var(--sc-ink, var(--accent)); border-radius: 99px; }

/* Leçon 0 : table des chapitres et usages en cybersécurité */
.ch-table { width: 100%; border-collapse: separate; border-spacing: 0 .5rem; font-family: var(--font-prose); margin: .6rem 0 1.6rem; }
.ch-table th { text-align: left; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-dim); padding: 0 .9rem; font-weight: 700; }
.ch-table td { padding: .8rem .9rem; background: var(--surface-h); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); font-size: .96rem; vertical-align: middle; }
.ch-table td:first-child { border-left: 1px solid var(--border); border-radius: 12px 0 0 12px; font-family: var(--font); color: var(--sc-ink, var(--accent)); white-space: nowrap; }
.ch-table td:last-child { border-right: 1px solid var(--border); border-radius: 0 12px 12px 0; white-space: nowrap; }
.ch-table td a { color: var(--text-bright); text-decoration: none; font-weight: 700; }
.ch-table td a:hover { text-decoration: underline; }
.ch-table .pre-chip { font-size: .8rem; color: var(--warn); }

.uses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 1rem; margin: 1rem 0 1.8rem; }
.use-card { padding: 1.1rem 1.2rem; border-radius: 16px; border: 1px solid color-mix(in srgb, #a855f7 30%, var(--border)); background: color-mix(in srgb, #a855f7 6%, var(--surface)); }
.use-card .ui { font-size: 1.8rem; line-height: 1; }
.use-card h5 { font-family: var(--font-prose); font-size: 1.04rem; color: var(--text-bright); margin: .6rem 0 .35rem; }
.use-card p { font-size: .94rem !important; line-height: 1.6 !important; margin: 0 !important; }
.use-card .later { display: block; margin-top: .55rem; font-size: .8rem; color: var(--text-dim); font-family: var(--font-prose); }

/* Accueil élargi */
.home-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1.1rem; }

@media (max-width: 1080px) {
  /* minmax(0, …) : sinon la plus longue ligne de code élargit toute la page (941 px pour 390) */
  .lesson-shell { grid-template-columns: minmax(0, 1fr); gap: 1.2rem; }
  .lesson-side { position: static; max-height: none; overflow: visible; }
  .stepper { flex-direction: row; overflow-x: auto; padding-bottom: .2rem; }
  .step { min-width: 190px; }
  .side-toc { display: none; }
}
@media (max-width: 900px) {
  .t-split { grid-template-columns: 1fr; }
  .sec-hero { grid-template-columns: 1fr; }
  .ring { width: 110px; height: 110px; } .ring > div { width: 86px; height: 86px; }
}
@media (max-width: 600px) {
  .ch-grid, .home-grid { grid-template-columns: 1fr; }
  .ch-table thead { display: none; }
  .ch-table td:nth-child(4) { display: none; }
  .theory-content p, .theory-content li { font-size: 1rem; }
  .theory-table th, .theory-table td { overflow-wrap: anywhere; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   CODE NUMÉROTÉ (comme IDLE) + EXÉCUTION PAS À PAS SUR PLACE — 18/10/2026
   learn.js range chaque bloc de code et chaque éditeur dans .code-block :
   [ .cb-nums | pre ou textarea ]. Le cadre porte fond, bordure et police ; le
   pre/textarea intérieur est neutralisé (transparent) pour que la barre .cb-hl
   de la ligne en cours passe DERRIÈRE le texte (z-index -1 dans le contexte
   isolé du cadre). Numéros et code partagent police, taille, interligne et
   marge haute : c'est ce qui les garde alignés ligne à ligne.
   ═══════════════════════════════════════════════════════════════════════════ */
/* Fira Code dessine « >= » en ⩾, « != » en ≠, « == » en trait long : un débutant
   recopierait ces signes, que Python refuse. Le code s'affiche donc tel qu'il se
   tape, comme dans IDLE. */
pre, code, kbd, samp, textarea, .code-block, .code-output, .pt-box, .idx { font-variant-ligatures: none; }
.code-block {
  position: relative; isolation: isolate; display: flex; align-items: stretch;
  margin: .8em 0 1.2em; border: 1px solid var(--border); border-left: 3px solid var(--accent-dim);
  border-radius: 12px; background: var(--code-bg); color: var(--code-text); overflow: hidden;
  font-family: var(--font); font-size: .88rem; line-height: 1.7;
}
.code-block > pre, .code-block > textarea {
  flex: 1 1 auto; min-width: 0; width: auto; min-height: 0; height: auto;
  margin: 0 !important; padding: 1rem 1.2rem 1rem .9rem !important;
  border: 0 !important; border-radius: 0 !important; box-shadow: none !important; background: transparent !important;
  font: inherit !important; color: inherit; white-space: pre; overflow-x: auto; overflow-y: hidden; tab-size: 4;
}
.code-block > textarea { display: block; resize: none; outline: none; }
.code-block > pre code { background: none; padding: 0; border-radius: 0; color: inherit; font-size: inherit; }
.code-block.has-tools { margin-bottom: .55rem; }
.cb-nums {
  flex: 0 0 auto; min-width: 3.2em; padding: 1rem .75em 1rem .5em; text-align: right; overflow: hidden;
  color: var(--text-dim); border-right: 1px solid var(--border); background: color-mix(in srgb, var(--text) 4%, transparent);
  user-select: none; -webkit-user-select: none; font-variant-numeric: tabular-nums;
}
.cb-nums > span { display: block; }
.cb-nums > span.on { color: var(--accent); font-weight: 700; }
.cb-hl {
  position: absolute; left: 0; right: 0; z-index: -1; pointer-events: none;
  background: color-mix(in srgb, var(--accent) 17%, transparent); box-shadow: inset 4px 0 0 var(--accent);
}
.cb-hl[hidden] { display: none; }
.cb-hl.is-err { background: color-mix(in srgb, #ef4444 20%, transparent); box-shadow: inset 4px 0 0 #ef4444; }
.code-block.is-editor { border-left-color: var(--accent); cursor: text; }
.code-block.is-editor:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.tutor-msg .code-block { margin: .5em 0; border-radius: 8px; font-size: .76rem; line-height: 1.55; }
.tutor-msg .code-block > pre, .tutor-msg .code-block .cb-nums { padding-top: .7em !important; padding-bottom: .7em !important; }

/* Un exemple qui montre ce que le programme AFFICHE (pas du code) : pas de numéros. */
.theory-content pre.out { position: relative; padding-top: 2rem; border-left-color: var(--info); }
.theory-content pre.out::before {
  content: "🖥️ Ce qui s'affiche"; position: absolute; top: .55rem; left: 1.2rem;
  font-family: var(--font-prose); font-size: .76rem; font-weight: 700; color: var(--text-dim);
}

/* Boutons sous un exemple exécutable */
.cb-tools { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0 0 1.3em; }
.cb-btn {
  display: inline-flex; align-items: center; gap: .4rem; padding: .48rem .95rem; border-radius: 10px; cursor: pointer;
  font-family: var(--font-prose); font-size: .92rem; font-weight: 700; transition: background .15s, color .15s;
  background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--accent); border: 1px solid var(--accent-dim);
}
.cb-btn:hover { background: var(--accent); color: #04130a; }
.cb-btn.ghost { background: transparent; color: var(--text); border-color: var(--border-h); font-weight: 600; }
.cb-btn.ghost:hover { background: var(--surface-h); color: var(--text-bright); }
:root[data-theme="light"] .cb-btn:not(.ghost):hover { color: #fff; }

/* Lecteur pas à pas : commandes, phrase d'explication, mémoire et console */
.pt-box {
  margin: 0 0 1.6rem; padding: .95rem 1.1rem 1.05rem; border-radius: 14px; font-family: var(--font-prose);
  border: 1px solid var(--border-h); background: color-mix(in srgb, var(--accent) 4%, var(--surface));
}
.pt-box[hidden], .pt-controls[hidden], .pt-panels[hidden] { display: none; }
.pt-controls { display: flex; align-items: center; gap: .45rem; flex-wrap: wrap; }
.pt-btn {
  padding: .42rem .8rem; border-radius: 9px; cursor: pointer; font-family: var(--font-prose); font-size: .88rem; font-weight: 600;
  background: var(--surface); color: var(--text); border: 1px solid var(--border-h);
}
.pt-btn:hover:not(:disabled) { color: var(--text-bright); border-color: var(--accent); }
.pt-btn:disabled { opacity: .4; cursor: default; }
.pt-btn.pt-next { background: var(--accent); color: #04130a; border-color: var(--accent); font-weight: 700; }
:root[data-theme="light"] .pt-btn.pt-next { color: #fff; }
.pt-stepinfo { min-width: 8.5em; text-align: center; font-family: var(--font); font-size: .8rem; color: var(--text-dim); }
.pt-caption { margin: .75rem 0 .85rem; font-size: .97rem; line-height: 1.65; color: var(--text); }
.pt-caption code { font-family: var(--font); font-size: .88em; padding: .05em .35em; border-radius: 4px;
  background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--accent); }
.pt-ko { color: var(--danger); }
.pt-panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: .8rem; }
.pt-panel-label { margin-bottom: .35rem; font-size: .82rem; font-weight: 700; color: var(--text-dim); }
.pt-vars, .pt-out {
  min-height: 3.4em; padding: .6em .8em; border-radius: 10px; border: 1px solid var(--border);
  background: var(--code-bg); color: var(--code-text); font-family: var(--font); font-size: .85rem; line-height: 1.55;
}
.pt-vars { display: flex; flex-direction: column; gap: .2em; }
.pt-out { white-space: pre-wrap; word-break: break-word; }
.pt-var { display: flex; gap: .5em; padding: .1em .35em; border-radius: 5px; }
.pt-var-name { color: var(--info); }
.pt-var-eq { color: var(--text-dim); }
.pt-var-val { color: var(--text-bright); word-break: break-all; }
.pt-var.is-new { background: color-mix(in srgb, #f59e0b 18%, transparent); }
.pt-var.is-new .pt-var-val { color: #f59e0b; font-weight: 700; }
:root[data-theme="light"] .pt-var.is-new .pt-var-val { color: #9a6700; }
.pt-new { color: var(--accent); font-weight: 700; }
.pt-dim { color: var(--text-dim); }

/* Règle d'index : un texte découpé case par case (slicing). --n = nb de cases. */
.idx {
  display: grid; grid-template-columns: repeat(var(--n), minmax(0, 2.5rem)); justify-content: start;
  margin: 1.1rem 0 1rem; font-family: var(--font);
}
.idx .c {
  grid-row: 1; display: grid; place-items: center; height: 2.6rem; margin-right: -1px;
  font-size: 1.15rem; font-weight: 600; color: var(--text-bright); background: var(--surface-h); border: 1px solid var(--border);
}
.idx .i { grid-row: 2; padding-top: .25rem; text-align: center; font-size: .74rem; color: var(--text-dim); }
.idx .br {
  grid-row: 3; margin: .35rem 3px 0; padding-top: .3rem; border-top: 3px solid var(--k); text-align: center;
  font-size: .78rem; font-weight: 700; white-space: nowrap; color: var(--k);
}
.idx .a { --k: #22c55e; }
.idx .x { --k: #ef4444; }
.idx .b { --k: #3b82f6; }
.idx .c.a, .idx .c.b { background: color-mix(in srgb, var(--k) 16%, var(--surface)); border-color: color-mix(in srgb, var(--k) 45%, transparent); }
.idx .c.x { background: color-mix(in srgb, var(--k) 12%, var(--surface)); border: 2px dashed var(--k); color: var(--k); }
.idx .br.x { border-top-color: transparent; }
:root[data-theme="light"] .idx .br, :root[data-theme="light"] .idx .c.x { color: color-mix(in srgb, var(--k) 70%, #000); }

/* « Le correcteur vérifie » sous chaque exercice de code (18/10/2026) : ce que le CODE
   doit contenir, pas seulement ce qu'il affiche ; ✓ / ✗ après « Vérifier ». */
.code-checks {
  margin: 0 0 1.1em; padding: .75rem .95rem; border-radius: 12px; font-family: var(--font-prose);
  border: 1px dashed var(--border-h); background: color-mix(in srgb, var(--accent) 4%, transparent);
}
.code-checks-title { margin-bottom: .4rem; font-size: .85rem; font-weight: 700; color: var(--text-dim); }
.code-checks ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .3rem; }
.code-checks li { display: flex; align-items: baseline; gap: .55rem; font-size: .95rem; line-height: 1.45; color: var(--text); }
.code-checks .cc-ico { flex: 0 0 1.1em; text-align: center; }
.code-checks .cc-ico::before { content: "○"; color: var(--text-dim); }
.code-checks li.ok .cc-ico::before { content: "✓"; color: var(--accent); font-weight: 800; }
.code-checks li.ko .cc-ico::before { content: "✗"; color: var(--danger); font-weight: 800; }
.code-checks li.ko .cc-txt { color: var(--text-bright); }
.code-checks .cc-why { color: var(--danger); font-size: .88rem; }

/* Questions de quiz avec du code (18/10/2026) : ```bloc``` → pre numéroté, `code` en ligne. */
.quiz-q-text code {
  font-family: var(--font); font-size: .9em; padding: .08em .38em; border-radius: 5px;
  background: color-mix(in srgb, var(--accent) 10%, transparent); color: var(--text-bright);
}
.quiz-q-text .code-block { margin: .7rem 0 .2rem; font-size: .86rem; }

/* ── Réseau, chapitre 1 : TCP dessiné (30/10/2026) ─────────────────────────
   Demande du user : développer le 3-way handshake avec un schéma, les numéros
   de séquence et tout ce qui compose un segment TCP. Composants :
   · .encap      — l'encapsulation : une barre (en-têtes + données) et, dessous,
                   les accolades segment / packet / frame ;
   · .tcp-ladder — l'échange en échelle (diagramme de séquence) : deux lignes de
                   vie, des flèches → / ← avec flags + seq/ack, des états entre
                   deux flèches, une flèche .lost qui se perd en route ;
   · .tcp-hdr    — l'en-tête TCP au bit près (32 colonnes = 32 bits par ligne,
                   16 sur téléphone), couleurs par rôle (--c) + .tcp-legend ;
   · .tcp-flags  — l'octet des 8 flags, bits levés en .on ;
   · .tcp-defs   — une fiche par champ, liseré de la couleur de son rôle.
   Couleurs mêlées à --surface : lisibles en clair comme en sombre. */
.c-port { --c: #3b82f6; } .c-seq { --c: #22c55e; } .c-ctl { --c: #94a3b8; } .c-flag { --c: #f59e0b; }
.c-win  { --c: #a855f7; } .c-sum { --c: #ef4444; } .c-opt { --c: #14b8a6; } .c-data { --c: #64748b; }

.encap { margin: 1.2rem 0 1.8rem; }
.encap-bar, .encap-br { display: grid; grid-template-columns: 1.2fr .8fr .9fr 2.3fr .7fr; }
.encap-bar > span {
  padding: .6rem .35rem; text-align: center; font: 700 .82rem/1.3 var(--font); color: var(--text-bright);
  border: 1px solid color-mix(in srgb, var(--c) 55%, transparent); background: color-mix(in srgb, var(--c) 18%, var(--surface));
  overflow-wrap: anywhere;
}
.encap-bar > span + span { border-left: 0; }
.encap-bar > span:first-child { border-radius: 10px 0 0 10px; }
.encap-bar > span:last-child  { border-radius: 0 10px 10px 0; }
.encap-bar small { display: block; font-weight: 400; font-size: .7rem; color: var(--text-dim); }
.encap-br { row-gap: .2rem; margin-top: .3rem; }
.encap-br > div { text-align: center; font: .86rem/1.3 var(--font-prose); color: var(--text); padding: 0 2px; }
.encap-br > div > i { display: block; height: .55rem; margin-bottom: .2rem; border: 2px solid var(--c); border-top: 0; border-radius: 0 0 8px 8px; }
.encap-br > div > b { color: var(--text-bright); }
.encap-br .b-seg { grid-column: 3 / 5; --c: #22c55e; }
.encap-br .b-pkt { grid-column: 2 / 5; --c: #3b82f6; }
.encap-br .b-frm { grid-column: 1 / 6; --c: #94a3b8; }

.tcp-ladder {
  --tl-side: 132px; --tl-go: var(--sc-ink, var(--accent)); --tl-back: #f59e0b;
  margin: 1.2rem 0 1.8rem; padding: 1rem 1rem .8rem; border-radius: 16px;
  border: 1px solid var(--border); background: var(--surface-h);
}
:root[data-theme="light"] .tcp-ladder { --tl-back: #b45309; }
.tl-head, .tl-row { display: grid; grid-template-columns: var(--tl-side) minmax(0, 1fr) var(--tl-side); }
.tl-end {
  text-align: center; padding: .55rem .35rem; border-radius: 12px; font-family: var(--font-prose);
  background: color-mix(in srgb, var(--sc, var(--accent)) 14%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--sc, var(--accent)) 40%, var(--border));
}
.tl-end b { display: block; font-size: 1rem; color: var(--text-bright); }
.tl-end small { display: block; font-size: .78rem; color: var(--text-dim); }
.tl-end code { display: block; margin-top: .15rem; font-size: .72rem; color: var(--text-bright); overflow-wrap: anywhere; }
.tl-head > .tl-end:first-child { grid-area: 1 / 1; }
.tl-head > .tl-end:last-child  { grid-area: 1 / 3; }
.tl-head > .tl-mid { align-self: center; text-align: center; font: .82rem/1.4 var(--font-prose); color: var(--text-dim); padding: 0 .5rem; }
.tl-row > .tl-life {
  display: flex; align-items: center; justify-content: center; min-height: 1.1rem;
  background: linear-gradient(var(--text-dim), var(--text-dim)) center / 2px 100% no-repeat;
}
.tl-life > span {
  position: relative; z-index: 1; padding: .18rem .4rem; border-radius: 6px; text-align: center;
  font: 700 .64rem/1.25 var(--font); letter-spacing: .03em; color: var(--text-bright);
  background: var(--surface); border: 1px solid var(--border-h); overflow-wrap: anywhere;
}
.tl-row.st { min-height: 1.9rem; }
.tl-msg {
  --c: var(--tl-go); position: relative; z-index: 2; margin: 0 calc(var(--tl-side) / -2);
  padding: .5rem 0 .45rem; display: flex; flex-direction: column; align-items: center; text-align: center;
}
.tl-msg.to-l { --c: var(--tl-back); }
.tl-top { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: .3rem .55rem; padding: 0 .9rem; }
.tl-flag { font: 800 .74rem/1 var(--font); padding: .28rem .5rem; border-radius: 6px; color: var(--bg); background: var(--c); letter-spacing: .02em; }
.tl-top code { font-family: var(--font); font-size: .8rem; color: var(--text-bright); }
.tl-line { position: relative; align-self: stretch; height: 2px; margin: .4rem 0; background: var(--c); }
.tl-line::after { content: ""; position: absolute; top: 50%; transform: translateY(-50%); border: 6px solid transparent; }
.to-r .tl-line::after { right: -2px; border-right: 0; border-left: 10px solid var(--c); }
.to-l .tl-line::after { left: -2px;  border-left: 0;  border-right: 10px solid var(--c); }
.tl-msg.lost .tl-line { align-self: flex-start; width: 58%; background: repeating-linear-gradient(90deg, var(--c) 0 7px, transparent 7px 11px); }
.tl-msg.lost .tl-line::after { content: "✗"; right: -1.15rem; border: 0; font: 800 1.15rem/1 var(--font-prose); color: var(--danger); }
.tl-note { font: .84rem/1.45 var(--font-prose); color: var(--text-dim); padding: 0 .9rem; }
.tl-note b { color: var(--text-bright); }

.tcp-hdr { margin: 1.2rem 0 .5rem; }
.th-ruler { display: flex; justify-content: space-between; font: .7rem var(--font); color: var(--text-dim); margin: 0 .2rem .3rem; }
.th-grid { display: grid; grid-template-columns: repeat(32, minmax(0, 1fr)); gap: 3px; }
.th-f {
  grid-column: span 16; min-height: 3.2rem; padding: .35rem .3rem; border-radius: 8px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  font: 700 .8rem/1.2 var(--font); color: var(--text-bright); overflow-wrap: anywhere;
  background: color-mix(in srgb, var(--c) 16%, var(--surface)); border: 1px solid color-mix(in srgb, var(--c) 50%, transparent);
}
.th-f small { margin-top: .15rem; font-weight: 400; font-size: .68rem; color: var(--text-dim); }
.th-f.w4  { grid-column: span 4; }
.th-f.w8  { grid-column: span 8; }
.th-f.w32 { grid-column: span 32; }
.th-f.dash { border-style: dashed; }
.th-f.data { background: transparent; }
.tcp-legend { display: flex; flex-wrap: wrap; gap: .35rem 1rem; margin: .7rem 0 1.6rem; font: .85rem/1.4 var(--font-prose); color: var(--text-dim); }
.tcp-legend span::before {
  content: ""; display: inline-block; width: .8rem; height: .8rem; margin-right: .35rem; vertical-align: -.1rem; border-radius: 3px;
  background: color-mix(in srgb, var(--c) 40%, var(--surface)); border: 1px solid var(--c);
}

.tcp-flags { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 4px; max-width: 560px; margin: 1rem 0 .5rem; }
.tcp-flags > div { text-align: center; padding: .45rem .15rem; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); font-family: var(--font); }
.tcp-flags b { display: block; font-size: .76rem; color: var(--text-bright); }
.tcp-flags i { display: block; font-style: normal; font-size: 1.1rem; font-weight: 800; color: var(--text-dim); }
.tcp-flags .on { border-color: #f59e0b; background: color-mix(in srgb, #f59e0b 22%, var(--surface)); }
.tcp-flags .on i { color: var(--text-bright); }
.tcp-cap { font: italic .86rem/1.5 var(--font-prose); color: var(--text-dim); margin: .2rem 0 1.5rem !important; }

.tcp-defs { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(285px, 100%), 1fr)); gap: .8rem; margin: 1rem 0 1.6rem; }
.tcp-defs > div { padding: .85rem 1rem; border-radius: 12px; background: var(--surface-h); border: 1px solid var(--border); border-left: 4px solid var(--c); }
.tcp-defs h5 { font: 700 .98rem/1.4 var(--font-prose); color: var(--text-bright); margin: 0 0 .3rem; }
.tcp-defs h5 small { font-weight: 400; font-size: .82rem; color: var(--text-dim); }
.tcp-defs p { font-size: .94rem !important; line-height: 1.6 !important; margin: 0 !important; }
.t-scroll { overflow-x: auto; }

@media (max-width: 640px) {
  /* Les flèches débordent de moitié sur les colonnes latérales : les élargir ne
     leur prend rien, et l'adresse IP entière tient enfin sur une ligne. */
  .tcp-ladder { --tl-side: 112px; padding: .8rem .45rem .6rem; }
  .tl-end { padding-left: .25rem; padding-right: .25rem; }
  .tl-end code { font-size: .62rem; padding: .05em .15em; }
  .tl-head > .tl-mid { grid-column: 1 / -1; grid-row: 2; padding: .45rem .3rem 0; }
  .th-grid { grid-template-columns: repeat(16, minmax(0, 1fr)); }
  .th-f.w32 { grid-column: span 16; }
  .th-ruler { display: none; }
  .encap-bar > span { font-size: .72rem; padding: .5rem .2rem; }
}
@media (max-width: 400px) {
  .tl-top { padding: 0 .4rem; }
  .tl-note { padding: 0 .4rem; }
}
@media (max-width: 360px) {
  .tcp-ladder { --tl-side: 104px; }
}

/* ── Réseau, chapitre 2 : sous-réseaux dessinés (30/10/2026) ────────────────
   Demande du user : un chapitre plus schématique pour calculer la plage
   disponible, le subnet mask, et le calcul IP ↔ mask (AND ; le OR du
   broadcast). Le HTML de ces schémas vient de SN (learn.js, §5) : la leçon et
   le calculateur partagent le même dessin.
   · .sn-32     — l'adresse sur 32 bits, une boîte par octet, une ligne par
                  opérande ; bits network .n (bleu) / host .h (ambre), .cut =
                  la coupe du mask, .hot = l'octet intéressant. @container :
                  4 octets par ligne, 2, ou 1 sur téléphone ;
   · .sn-dec    — les 4 octets en décimal, l'octet intéressant surligné ;
   · .sn-zoom   — un octet en gros plan, poids 128 → 1 en tête ;
   · .sn-truth  — la table du AND / du OR ;
   · .sn-blocks — l'octet découpé en blocs (block size), repère sur l'IP ;
   · .sn-range  — [network | usable hosts | broadcast] ;
   · .sn-res    — les résultats en tuiles ; .sn-lab — le calculateur.
   Couleurs mêlées à --surface : lisibles en clair comme en sombre. */
:root { --sn-n: #3b82f6; --sn-h: #f59e0b; --sn-u: #22c55e; --sn-b: #a855f7; --sn-cut: #ef4444; }
.sn-n { --c: var(--sn-n); } .sn-h { --c: var(--sn-h); } .sn-u { --c: var(--sn-u); } .sn-b { --c: var(--sn-b); } .sn-cutk { --c: var(--sn-cut); }

.sn-32, .sn-dec, .sn-zoom, .sn-truth {
  margin: 1.2rem 0 .6rem; padding: .85rem .95rem; border-radius: 16px;
  border: 1px solid var(--border); background: var(--surface-h); font-family: var(--font);
}
.sn-32 { container-type: inline-size; }
.sn-g { --rh: 1.9rem; display: grid; grid-template-columns: max-content repeat(4, minmax(0, 1fr)); gap: .55rem .6rem; align-items: start; }
.sn-lb, .sn-ob { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.sn-lb > span {
  height: var(--rh); display: flex; align-items: center; justify-content: flex-end; padding-right: .1rem;
  font: 600 .8rem/1 var(--font-prose); color: var(--text-dim); white-space: nowrap;
}
.sn-lb > span:first-child, .sn-oh { height: 1.25rem; }
.sn-lb > span.r { color: var(--text-bright); }
.sn-g > .sn-lb.x { display: none; }
.sn-ob { padding: 0 .3rem .3rem; border-radius: 10px; }
.sn-ob.hot { background: color-mix(in srgb, var(--sc, var(--accent)) 10%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--sc, var(--accent)) 50%, transparent); }
.sn-oh { display: flex; align-items: center; justify-content: center; font: .72rem/1 var(--font-prose); color: var(--text-dim); }
.sn-ob.hot .sn-oh { color: var(--sc-ink, var(--accent)); font-weight: 700; }
.sn-or { height: var(--rh); display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)) 2.4rem; gap: 2px; }
.sn-or > i {
  display: grid; place-items: center; min-width: 0; font-style: normal; font-size: .84rem; color: var(--text-dim);
  border-radius: 4px; background: var(--surface); border: 1px solid var(--border);
}
.sn-or > i.n { background: color-mix(in srgb, var(--sn-n) 15%, var(--surface)); border-color: color-mix(in srgb, var(--sn-n) 38%, transparent); }
.sn-or > i.h { background: color-mix(in srgb, var(--sn-h) 15%, var(--surface)); border-color: color-mix(in srgb, var(--sn-h) 38%, transparent); }
.sn-or > i.on { color: var(--text-bright); font-weight: 800; }
.sn-or > i.cut { box-shadow: -3px 0 0 var(--sn-cut); }
.sn-or > b { display: flex; align-items: center; justify-content: flex-end; font-size: .9rem; color: var(--text-bright); }
/* La ligne du résultat, sous un trait (comme une addition posée). Même trait,
   même hauteur côté étiquettes : les lignes restent alignées. */
.sn-or.r, .sn-lb > span.r { box-sizing: content-box; margin-top: 3px; padding-top: 4px; border-top: 2px solid var(--border-h); }
.sn-or.r > b { color: var(--sc-ink, var(--accent)); font-weight: 800; }
@container (max-width: 50rem) {
  .sn-g { grid-template-columns: max-content repeat(2, minmax(0, 1fr)); }
  .sn-g > .sn-lb.x2 { display: flex; }
}
@container (max-width: 27rem) {
  .sn-g { grid-template-columns: max-content minmax(0, 1fr); }
  .sn-g > .sn-lb.x { display: flex; }
}

.sn-dec {
  display: grid; grid-template-columns: max-content repeat(3, minmax(2.1rem, 3.6rem) .6rem) minmax(2.1rem, 3.6rem);
  gap: 4px 2px; align-items: center; width: max-content; max-width: 100%;
}
.sn-dec .l, .sn-zoom .l {
  font: 600 .8rem/1.2 var(--font-prose); color: var(--text-dim); text-align: right; padding-right: .55rem; white-space: nowrap;
}
.sn-dec .l.r, .sn-zoom .l.r { color: var(--text-bright); }
.sn-dec .o { text-align: center; padding: .3rem 0; border-radius: 7px; font-size: 1.02rem; font-weight: 600; color: var(--text-bright); }
.sn-dec .o.hot { background: color-mix(in srgb, var(--sc, var(--accent)) 16%, var(--surface)); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--sc, var(--accent)) 50%, transparent); }
.sn-dec .o.r { color: var(--sc-ink, var(--accent)); font-weight: 800; }
.sn-dec .d { text-align: center; font-style: normal; font-weight: 800; color: var(--text-dim); }
.sn-dec .nt { text-align: center; font: .68rem/1.25 var(--font-prose); color: var(--text-dim); padding-top: .15rem; }
.sn-dec .nt.hot { color: var(--sc-ink, var(--accent)); font-weight: 700; }
.sn-dec .sn-hr, .sn-zoom .sn-hr { grid-column: 1 / -1; height: 2px; background: var(--border-h); }

.sn-zoom {
  display: grid; grid-template-columns: max-content repeat(8, minmax(0, 2.6rem)) max-content;
  gap: 4px; align-items: center; width: max-content; max-width: 100%;
}
.sn-zoom .w { text-align: center; font-size: .7rem; color: var(--text-dim); }
.sn-zoom .bt {
  height: 2.15rem; display: grid; place-items: center; min-width: 0; border-radius: 7px; font-size: 1.02rem; color: var(--text-dim);
  background: var(--surface); border: 1px solid var(--border);
}
.sn-zoom .bt.on { color: var(--text-bright); font-weight: 800; }
.sn-zoom .bt.on:not(.n):not(.h) { background: color-mix(in srgb, var(--sc, var(--accent)) 18%, var(--surface)); border-color: color-mix(in srgb, var(--sc, var(--accent)) 50%, transparent); }
.sn-zoom .bt.n { background: color-mix(in srgb, var(--sn-n) 15%, var(--surface)); border-color: color-mix(in srgb, var(--sn-n) 40%, transparent); }
.sn-zoom .bt.h { background: color-mix(in srgb, var(--sn-h) 15%, var(--surface)); border-color: color-mix(in srgb, var(--sn-h) 40%, transparent); }
.sn-zoom .v { padding-left: .55rem; font-size: .95rem; font-weight: 700; color: var(--text-bright); white-space: nowrap; }
.sn-zoom .v.r { color: var(--sc-ink, var(--accent)); font-weight: 800; }
/* Le contre-exemple (IP OR mask) : le résultat en rouge, la valeur barrée. */
.sn-zoom.wrong .bt.r, .sn-zoom.wrong .v.r { color: var(--danger); }
.sn-zoom.wrong .v.r { text-decoration: line-through; text-decoration-thickness: 2px; }

.sn-truth {
  display: inline-grid; grid-template-columns: repeat(5, auto); gap: .25rem .55rem; align-items: center; justify-items: center;
  margin: .8rem 1rem .9rem 0; padding: .6rem 1rem; font-size: 1rem; vertical-align: top;
}
.sn-truth em { font-style: normal; font-size: .78rem; font-weight: 700; color: var(--text-dim); }
.sn-truth span, .sn-truth b { color: var(--text-dim); }
.sn-truth .on { color: var(--text-bright); font-weight: 800; }
.sn-truth b { min-width: 1.6rem; text-align: center; border-radius: 6px; }
.sn-truth b.on { background: color-mix(in srgb, var(--sc, var(--accent)) 22%, var(--surface)); }

.sn-blocks { display: flex; gap: 3px; margin: 1rem 0 .5rem; padding-top: 1.9rem; font-family: var(--font); }
.sn-bk {
  position: relative; flex: 1 1 0; min-width: 0; padding: .45rem .15rem; text-align: center;
  border-radius: 8px; border: 1px solid var(--border); background: var(--surface-h);
}
.sn-bk b { display: block; font-size: .92rem; color: var(--text-bright); }
.sn-bk small { display: block; font-size: .7rem; color: var(--text-dim); white-space: nowrap; }
.sn-bk.on { border-color: var(--sc-ink, var(--accent)); background: color-mix(in srgb, var(--sc, var(--accent)) 16%, var(--surface)); }
.sn-bk.more { flex: 0 0 1.9rem; display: grid; place-items: center; padding: .45rem 0; border-style: dashed; color: var(--text-dim); }
.sn-bk .pin, .sn-rg .pin {
  position: absolute; bottom: 100%; left: clamp(1.1rem, var(--p), calc(100% - 1.1rem)); transform: translateX(-50%); margin-bottom: .45rem;
  padding: .2rem .4rem; border-radius: 6px; white-space: nowrap; font: 700 .74rem/1.1 var(--font); font-style: normal;
  color: var(--bg); background: var(--sc-ink, var(--accent));
}
.sn-bk .pin::after, .sn-rg .pin::after {
  content: ""; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  border: 5px solid transparent; border-top-color: var(--sc-ink, var(--accent));
}

.sn-range {
  display: grid; grid-template-columns: minmax(4.4rem, 1fr) minmax(0, 2.4fr) minmax(4.4rem, 1fr); gap: 3px;
  margin: 1rem 0 .5rem; padding-top: 1.9rem; font-family: var(--font-prose);
}
.sn-range.one { grid-template-columns: minmax(0, 1fr); }
.sn-rg {
  --c: var(--sn-u); position: relative; min-width: 0; padding: .55rem .4rem; text-align: center; border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--c) 50%, transparent); background: color-mix(in srgb, var(--c) 15%, var(--surface));
}
.sn-rg.net { --c: var(--sn-n); border-radius: 12px 4px 4px 12px; }
.sn-rg.bc  { --c: var(--sn-b); border-radius: 4px 12px 12px 4px; }
.sn-range.one .sn-rg { border-radius: 12px; }
.sn-rg small { display: block; font-size: .72rem; color: var(--text-dim); }
.sn-rg b { display: block; margin: .1rem 0; font: 700 .95rem/1.35 var(--font); color: var(--text-bright); }
.sn-rg > span { display: block; font-size: .76rem; color: var(--text); }

.sn-res { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(16.5rem, 100%), 1fr)); gap: .55rem; margin: 1rem 0 1.2rem; }
.sn-res > div {
  --c: var(--border-h); min-width: 0; padding: .6rem .8rem; border-radius: 12px;
  border: 1px solid var(--border); border-left: 4px solid var(--c); background: var(--surface-h);
}
.sn-res > .net { --c: var(--sn-n); } .sn-res > .use, .sn-res > .cnt { --c: var(--sn-u); } .sn-res > .bc { --c: var(--sn-b); }
.sn-res small { display: block; font: .76rem/1.35 var(--font-prose); color: var(--text-dim); }
.sn-res small i { font-style: normal; }
.sn-res b { display: block; font: 700 1rem/1.4 var(--font); color: var(--text-bright); overflow-wrap: anywhere; }
.sn-res b i { font-style: normal; font-weight: 400; font-size: .8rem; color: var(--text-dim); }
.sn-res b + small { margin-top: .1rem; font-family: var(--font); }

/* Une bande décimale et son gros plan, côte à côte quand la place le permet. */
.sn-pair { display: flex; flex-wrap: wrap; align-items: flex-start; column-gap: 1rem; }
.sn-pair > .sn-dec, .sn-pair > .sn-zoom { margin-bottom: .2rem; }
.sn-pair + .tcp-cap, .sn-pair + p { margin-top: .6rem; }

.sn-lab {
  margin: 1.4rem 0 1.8rem; padding: 1rem 1.1rem 1.2rem; border-radius: 18px;
  border: 1px solid color-mix(in srgb, var(--sc, var(--accent)) 45%, var(--border)); background: color-mix(in srgb, var(--sc, var(--accent)) 5%, var(--surface));
}
.sn-form { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1rem; }
.sn-form label { display: flex; align-items: center; gap: .45rem; font: 700 .95rem var(--font); color: var(--text-bright); }
.sn-form input[type="text"], .sn-form input[type="number"] {
  font: 600 1.05rem var(--font); padding: .45rem .6rem; border-radius: 10px; min-width: 0;
  border: 1px solid var(--border-h); background: var(--surface); color: var(--text-bright);
}
.sn-f-ip input { width: 10.5em; }
.sn-f-p input { width: 4.2em; }
.sn-form input.bad { border-color: var(--danger); box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 20%, transparent); }
.sn-f-r { flex: 1 1 12rem; min-width: 0; accent-color: var(--sc-ink, var(--accent)); }
.sn-presets { display: flex; flex-wrap: wrap; gap: .4rem; margin: .75rem 0 .2rem; }
.sn-presets button {
  cursor: pointer; padding: .3rem .65rem; border-radius: 999px; font: .82rem var(--font);
  border: 1px solid var(--border-h); background: var(--surface); color: var(--text);
}
.sn-presets button:hover { border-color: var(--sc-ink, var(--accent)); color: var(--text-bright); }
.sn-presets button small { font-family: var(--font-prose); color: var(--text-dim); }
.sn-lab .sn-say { margin: .8rem 0 0 !important; font: 600 1rem/1.55 var(--font-prose) !important; color: var(--text-bright); overflow-wrap: anywhere; }
.sn-lab .sn-say.bad { color: var(--danger); }
.sn-out h5 { margin: 1.4rem 0 .1rem; font: 700 1rem/1.45 var(--font-prose); color: var(--text-bright); }
.sn-out h5 small { font-weight: 400; color: var(--text-dim); }
.sn-nojs { color: var(--text-dim); font-style: italic; }

@media (max-width: 640px) {
  /* Sur téléphone, les bits d'abord : étiquettes et valeurs prennent leur
     largeur la plus étroite (« wild-/card », « 64+/32+/4 » passent à la ligne). */
  .sn-32, .sn-dec, .sn-zoom { padding: .7rem .55rem; }
  .sn-zoom { grid-template-columns: min-content repeat(8, minmax(0, 2.6rem)) min-content; gap: 3px; }
  .sn-dec { grid-template-columns: min-content repeat(3, minmax(2rem, 3.6rem) .5rem) minmax(2rem, 3.6rem); }
  .sn-dec .l, .sn-zoom .l { font-size: .72rem; padding-right: .3rem; white-space: normal; }
  .sn-zoom .w { font-size: .62rem; letter-spacing: -.03em; }
  .sn-zoom .bt { font-size: .92rem; }
  .sn-zoom .v { padding-left: .3rem; font-size: .84rem; white-space: normal; }
  .sn-dec .nt { font-size: .62rem; }
  .sn-bk small { font-size: .6rem; white-space: normal; }
  .sn-rg b { font-size: .84rem; }
  .sn-lab { padding: .85rem .6rem 1rem; }
}