/* ── 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; }

/* Code cliquable : bouton « Visualiser ce code » sous un bloc runnable */
.theory-content pre.theory-code.runnable { margin-bottom: .4em; }
.theory-run-bar { margin: 0 0 1.3em; }
.theory-run-btn {
  font-family: var(--font); font-size: .74rem; cursor: pointer;
  background: rgba(119,255,136,.07); color: var(--accent);
  border: 1px solid var(--accent-dim); border-radius: 6px;
  padding: .4em .85em; letter-spacing: .03em; transition: background .15s, color .15s;
}
.theory-run-btn:hover { background: var(--accent); color: #061; border-color: var(--accent); }
.theory-runbox { margin: 0 0 1.6em; }
.theory-runbox .pytrace { margin: 0; }

.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); }

/* ── Visualiseur Python pas-à-pas ───────────────── */
.pytrace {
  margin: 1.2em 0; border: 1px solid var(--border-h);
  background: rgba(0,0,0,.35); border-radius: var(--radius); overflow: hidden;
}
.pt-head {
  padding: .55em 1em; background: rgba(119,255,136,.06);
  border-bottom: 1px solid var(--border);
}
.pt-title { font-size: .74rem; letter-spacing: .08em; color: var(--accent); }
.pt-editor { min-height: 120px; margin: .8em 1em 0; width: calc(100% - 2em); }
.pt-codeview {
  margin: .8em 1em; background: rgba(0,0,0,.5);
  border: 1px solid var(--border); border-left: 3px solid var(--accent-dim);
  font-size: .8rem; line-height: 1.6; overflow-x: auto;
}
.pt-line { display: flex; padding: .05em 0; white-space: pre; }
.pt-gutter {
  flex: 0 0 2.4em; text-align: right; padding-right: .9em;
  color: var(--text-dim); user-select: none; border-right: 1px solid rgba(255,255,255,.05);
}
.pt-src { padding-left: .9em; color: rgba(255,255,255,.72); }
.pt-line.pt-active { background: rgba(119,255,136,.13); }
.pt-line.pt-active .pt-gutter { color: var(--accent); }
.pt-line.pt-active .pt-src { color: #fff; }
.pt-line.pt-active::before { content: "▶"; color: var(--accent); position: absolute; margin-left: -.1em; }
.pt-controls { display: flex; align-items: center; gap: .7em; flex-wrap: wrap; padding: 0 1em .4em; }
.pt-player { display: flex; align-items: center; gap: .5em; flex-wrap: wrap; }
.pt-stepinfo { font-size: .72rem; color: var(--accent); letter-spacing: .05em; min-width: 6em; text-align: center; }
.pt-panels { display: grid; grid-template-columns: 1fr 1fr; gap: .8em; padding: 0 1em .8em; }
@media (max-width: 600px) { .pt-panels { grid-template-columns: 1fr; } }
.pt-panel-label {
  font-size: .64rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: .4em;
}
.pt-vars {
  min-height: 3em; padding: .6em .8em; background: rgba(0,0,0,.5);
  border: 1px solid var(--border); display: flex; flex-direction: column; gap: .25em;
}
.pt-var { display: flex; gap: .5em; font-size: .8rem; padding: .15em .3em; border-radius: 2px; }
.pt-var-name { color: var(--info); min-width: 4em; }
.pt-var-eq { color: var(--text-dim); }
.pt-var-val { color: #fff; }
.pt-var-changed { background: rgba(255,200,50,.16); }
.pt-var-changed .pt-var-val { color: #ffc832; font-weight: 600; }
.pt-out {
  min-height: 3em; margin: 0; padding: .6em .8em; background: rgba(0,0,0,.5);
  border: 1px solid var(--border); font-size: .79rem; line-height: 1.5;
  white-space: pre-wrap; word-break: break-word; color: rgba(255,255,255,.8);
}
.pt-dim { color: var(--text-dim); }
.pt-caption { padding: .2em 1em 1em; font-size: .75rem; color: var(--text-dim); line-height: 1.5; }

/* ── 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; }

/* ── 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; }
}