/* =========================================================
   Atelier Prompt Injection — palette terminal / CTF rétro
   Pas de web font externe : on s'appuie sur la pile mono système
   pour rester offline-capable et compatible avec la CSP nginx.
   ========================================================= */

:root {
  --bg: #0b0f0d;
  --bg-elev: #11161a;
  --bg-card: #161c20;
  --bg-hover: #1c2429;
  --border: #2a3a36;
  --border-hot: #3a5a52;
  --text: #d4e4d8;
  --text-dim: #8a9e94;       /* bumped pour atteindre WCAG AA sur --bg */
  --text-mute: #5a6a62;      /* bumped (était 4a5a52) */

  --green: #4ade80;
  --green-hot: #22c55e;
  --green-glow: rgba(74, 222, 128, 0.25);
  --green-soft: rgba(74, 222, 128, 0.08);
  --red: #ef4444;
  --red-glow: rgba(239, 68, 68, 0.2);
  --amber: #fbbf24;
  --amber-glow: rgba(251, 191, 36, 0.2);
  --blue: #60a5fa;
  --violet: #c084fc;

  --mono: 'JetBrains Mono', 'Fira Code', 'Menlo', 'Consolas', monospace;
  --display: 'JetBrains Mono', 'Fira Code', monospace;

  --radius: 6px;
  --radius-sm: 4px;
  --radius-lg: 10px;
  --pad-sm: 8px;
  --pad: 14px;
  --pad-lg: 24px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 0 1px var(--green-glow), 0 6px 20px rgba(74, 222, 128, 0.18);

  --ring: 0 0 0 2px var(--bg), 0 0 0 4px var(--green);

  --t-fast: 0.12s cubic-bezier(0.4, 0, 0.2, 1);
  --t-base: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(circle at 20% 0%, rgba(74, 222, 128, 0.06), transparent 50%),
    radial-gradient(circle at 80% 100%, rgba(96, 165, 250, 0.05), transparent 50%);
}

/* Sélection de texte */
::selection { background: var(--green-glow); color: var(--text); }
::-moz-selection { background: var(--green-glow); color: var(--text); }

/* Caret color global */
input, textarea { caret-color: var(--green); }

/* Scanline overlay subtile */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 3px
  );
  z-index: 1000;
}

/* A11y : focus visible (clavier uniquement) */
:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-color: var(--green) !important;
}
button:focus, input:focus, textarea:focus, select:focus, a:focus {
  outline: none;
}

/* Scrollbars unifiés (Firefox + Webkit) */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 8px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--border-hot); }

/* Layout général */
.shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--pad-lg);
}

.shell-wide {
  max-width: 1500px;
  margin: 0 auto;
  padding: var(--pad-lg);
}

/* Headers */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--pad);
  margin-bottom: var(--pad-lg);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 18px;
  color: var(--green);
  letter-spacing: 0.05em;
}

.brand::before {
  content: '> ';
  color: var(--green-hot);
}

.brand-sub {
  color: var(--text-dim);
  font-size: 12px;
  margin-left: 8px;
}

/* Boutons */
button, .btn {
  font-family: var(--mono);
  font-size: 13px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast),
              color var(--t-fast), box-shadow var(--t-fast),
              transform var(--t-fast);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

button:hover, .btn:hover {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-soft);
}

button:active, .btn:active {
  transform: translateY(1px);
}

button:disabled, .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

button:disabled:hover, .btn:disabled:hover {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
  transform: none;
}

.btn-primary {
  background: var(--green);
  color: var(--bg);
  border-color: var(--green);
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 0 0 0 var(--green-glow);
}

.btn-primary:hover {
  background: var(--green-hot);
  color: var(--bg);
  border-color: var(--green-hot);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 0 16px var(--green-glow);
}

.btn-danger {
  border-color: var(--red);
  color: var(--red);
}

.btn-danger:hover {
  background: var(--red-glow);
  color: var(--red);
  border-color: var(--red);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.25);
}

.btn-ghost {
  border-color: transparent;
  color: var(--text-dim);
  padding: 4px 10px;
}

.btn-ghost:hover {
  background: var(--bg-hover);
  border-color: var(--border);
  color: var(--text);
}

.btn-sm {
  font-size: 11px;
  padding: 4px 10px;
}

/* Inputs */
input, textarea, select {
  font-family: var(--mono);
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 9px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  width: 100%;
  transition: border-color var(--t-fast), background var(--t-fast),
              box-shadow var(--t-fast);
}

input::placeholder, textarea::placeholder {
  color: var(--text-mute);
  opacity: 1;
}

input:hover, textarea:hover, select:hover {
  border-color: var(--border-hot);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--green);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px var(--green-soft);
}

textarea {
  resize: vertical;
  min-height: 60px;
}

label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad-lg);
}

.card h2, .card h3 {
  margin-top: 0;
  font-family: var(--display);
  color: var(--text);
}

/* ============ LOGIN PAGE ============ */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--pad-lg);
}

.login-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: card-in 0.5s var(--t-slow);
}

/* Glow subtil au-dessus de la card */
.login-card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  opacity: 0.5;
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.login-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  color: var(--green);
  margin: 0 0 6px 0;
  text-align: center;
  letter-spacing: 0.02em;
}

.login-title::before { content: '$ '; }
/* Curseur clignotant en suffixe pour ambiance terminal */
.login-title::after {
  content: '_';
  color: var(--green);
  opacity: 1;
  animation: caret 1.1s steps(1) infinite;
  margin-left: 2px;
}
@keyframes caret {
  50% { opacity: 0; }
}

.login-sub {
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 28px;
}

.field { margin-bottom: 18px; }

.login-card .field input {
  font-size: 16px;
  letter-spacing: 0.15em;
  padding: 12px 14px;
}

.login-actions { margin-top: 24px; }

.login-actions button { width: 100%; padding: 13px; font-size: 14px; letter-spacing: 0.04em; }

.login-foot {
  text-align: center;
  margin-top: 24px;
  font-size: 12px;
}

.login-foot a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px dotted var(--text-mute);
}

.login-foot a:hover { color: var(--green); border-color: var(--green); }

@media (max-width: 480px) {
  .login-card { padding: 24px; }
  .login-title { font-size: 18px; }
}

.error {
  color: var(--red);
  background: var(--red-glow);
  border: 1px solid var(--red);
  padding: 10px;
  border-radius: var(--radius);
  font-size: 12px;
  margin-bottom: 16px;
}

.notice {
  color: var(--green);
  background: var(--green-glow);
  border: 1px solid var(--green);
  padding: 10px;
  border-radius: var(--radius);
  font-size: 12px;
  margin-bottom: 16px;
}

/* ============ LEVEL SELECTOR ============ */
.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

.level-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: border-color var(--t-base), transform var(--t-base),
              box-shadow var(--t-base), background var(--t-base);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  animation: card-in 0.4s var(--t-slow) backwards;
}

/* Stagger pour les cartes : index injecté en JS via style.setProperty('--i', n) */
.level-card { animation-delay: calc(var(--i, 0) * 50ms); }

.level-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 100% 0%, var(--green-soft), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-base);
  pointer-events: none;
}

.level-card:hover {
  border-color: var(--green);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--green-glow);
}

.level-card:hover::before { opacity: 1; }

.level-card.locked {
  opacity: 0.55;
  cursor: not-allowed;
  filter: grayscale(0.4);
}

.level-card.locked:hover {
  border-color: var(--border);
  transform: none;
  box-shadow: var(--shadow-sm);
}

.level-card.locked:hover::before { opacity: 0; }

.level-card.solved {
  border-color: rgba(74, 222, 128, 0.4);
  background: linear-gradient(180deg, var(--bg-card), rgba(74, 222, 128, 0.05));
}

.level-card.current {
  border-color: var(--amber);
  box-shadow: 0 0 0 1px var(--amber-glow), var(--shadow-md);
  animation: pulse-current 2.4s infinite ease-in-out;
}

@keyframes pulse-current {
  0%, 100% { box-shadow: 0 0 0 1px var(--amber-glow), var(--shadow-md); }
  50% { box-shadow: 0 0 0 6px var(--amber-glow), var(--shadow-md); }
}

.level-num {
  font-family: var(--display);
  font-size: 34px;
  font-weight: 700;
  color: var(--text-mute);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.level-card.solved .level-num { color: var(--green); }
.level-card.current .level-num { color: var(--amber); }

.level-name {
  font-family: var(--display);
  font-size: 18px;
  margin: 10px 0 6px 0;
  color: var(--text);
  letter-spacing: -0.01em;
}

.level-desc {
  color: var(--text-dim);
  font-size: 12px;
  min-height: 36px;
  line-height: 1.5;
}

.level-status {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  padding: 3px 8px;
  border-radius: 99px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  font-weight: 500;
}

.level-status.solved { color: var(--green); border-color: rgba(74, 222, 128, 0.35); background: rgba(74, 222, 128, 0.08); }
.level-status.locked { color: var(--text-mute); }
.level-status.current { color: var(--amber); border-color: rgba(251, 191, 36, 0.4); background: rgba(251, 191, 36, 0.08); }

/* ============ CHAT VIEW ============ */
.chat-shell {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: calc(100vh - 60px);
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
  gap: 14px;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 10px;
}

.chat-title {
  font-family: var(--display);
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.01em;
}

.chat-title .num {
  color: var(--green);
  margin-right: 6px;
  font-variant-numeric: tabular-nums;
}

.chat-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.model-badge {
  font-family: var(--mono);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 11px;
  color: var(--violet);
  letter-spacing: 0.04em;
}

.chat-window {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
}

.bubble {
  max-width: 82%;
  padding: 11px 15px;
  border-radius: 10px;
  font-size: 13px;
  white-space: pre-wrap;
  word-wrap: break-word;
  animation: bubble-in 0.25s var(--t-slow);
  box-shadow: var(--shadow-sm);
  line-height: 1.55;
}

@keyframes bubble-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.bubble-user {
  align-self: flex-end;
  background: var(--green);
  color: var(--bg);
  border-bottom-right-radius: 3px;
  font-weight: 500;
}

.bubble-assistant {
  align-self: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 3px;
}

.bubble-assistant::before {
  content: '◆ assistant';
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-mute);
  margin-bottom: 6px;
  font-weight: 600;
}

.bubble-hint {
  align-self: center;
  background: linear-gradient(180deg, var(--amber-glow), rgba(251, 191, 36, 0.08));
  border: 1px solid var(--amber);
  color: var(--amber);
  max-width: 92%;
  font-style: italic;
  border-radius: var(--radius);
  box-shadow: 0 0 16px rgba(251, 191, 36, 0.15);
}

.bubble-hint::before {
  content: '✦ Indice du formateur';
  display: block;
  font-style: normal;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 6px;
  font-weight: 700;
}

.thinking {
  align-self: flex-start;
  color: var(--text-dim);
  font-size: 12px;
  font-style: italic;
  padding: 8px 14px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.thinking::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--green);
  animation: dot-pulse 1.2s infinite ease-in-out;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.1); box-shadow: 0 0 8px var(--green-glow); }
}

.chat-input {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.chat-input textarea {
  min-height: 50px;
  max-height: 200px;
  font-size: 13px;
}

.chat-input button { padding: 10px 18px; }

.chat-foot {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 8px;
}

.chat-foot .counter { color: var(--text-mute); }

/* Verify box */
.verify-box {
  background: linear-gradient(180deg, var(--bg-card), var(--bg-elev));
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
  box-shadow: var(--shadow-sm);
}

.verify-box label {
  grid-column: 1 / -1;
  margin-bottom: 4px;
}

.verify-box input {
  font-size: 15px;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.verify-result {
  grid-column: 1 / -1;
  font-size: 12px;
  margin-top: 4px;
  min-height: 1em;
}

.verify-result.ok { color: var(--green); }
.verify-result.ko { color: var(--red); }

/* Success overlay */
.success-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 13, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadein 0.3s;
}

.success-overlay.hidden { display: none; }

@keyframes fadein {
  from { opacity: 0; }
  to { opacity: 1; }
}

.success-banner {
  text-align: center;
  font-family: var(--display);
  animation: success-in 0.4s var(--t-slow);
}

@keyframes success-in {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: none; }
}

.success-banner h1 {
  font-size: 56px;
  color: var(--green);
  margin: 0;
  letter-spacing: 0.06em;
  text-shadow: 0 0 20px var(--green-glow);
  animation: glow 1.4s infinite alternate ease-in-out;
}

.success-banner p {
  color: var(--text);
  margin-top: 16px;
  font-size: 14px;
}

@keyframes glow {
  from { text-shadow: 0 0 10px var(--green-glow); }
  to { text-shadow: 0 0 30px var(--green-glow), 0 0 60px var(--green-glow); }
}

/* ============ ADMIN DASHBOARD ============ */
.admin-grid {
  display: grid;
  grid-template-columns: 320px 1fr 380px;
  gap: 14px;
  height: calc(100vh - 100px);
}

.admin-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--shadow-sm);
}

.admin-col h2 {
  margin: 0 0 8px 0;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
}

.admin-col h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  margin: 14px 0 6px 0;
  font-weight: 500;
}

.session-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.session-item {
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color var(--t-fast), background var(--t-fast),
              transform var(--t-fast);
  background: var(--bg-elev);
}

.session-item:hover {
  border-color: var(--green);
  background: var(--bg-hover);
}
.session-item.selected {
  border-color: var(--green);
  background: var(--green-soft);
  box-shadow: inset 3px 0 0 var(--green);
}
.session-item.revoked { opacity: 0.55; }
.session-item.revoked .session-token { text-decoration: line-through; }
.session-item.demo {
  border-color: var(--violet);
  background: linear-gradient(180deg, var(--bg-elev), rgba(192, 132, 252, 0.05));
}

.session-token {
  font-family: var(--display);
  font-size: 16px;
  color: var(--green);
  letter-spacing: 0.1em;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.session-meta {
  font-size: 11px;
  color: var(--text-dim);
}

.session-badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  margin-left: 6px;
  background: var(--bg-elev);
  color: var(--text-dim);
}

.session-badge.new { background: var(--amber); color: var(--bg); animation: blink 1s infinite; }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.admin-conv {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.admin-conv-header {
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.admin-conv-secret {
  font-family: var(--display);
  background: var(--bg-elev);
  border: 1px dashed var(--green);
  color: var(--green);
  padding: 5px 12px;
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.12em;
  font-weight: 600;
  box-shadow: 0 0 12px rgba(74, 222, 128, 0.1);
}

.admin-level-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.admin-level-tab {
  font-size: 11px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
}

.admin-level-tab:hover { border-color: var(--green); color: var(--green); }
.admin-level-tab.active { border-color: var(--green); color: var(--green); background: var(--green-glow); }
.admin-level-tab.solved::after { content: ' ✓'; color: var(--green); }
.admin-level-tab.locked { opacity: 0.4; }

.admin-conv-body {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: var(--bg-elev);
  border-radius: var(--radius);
  min-height: 200px;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.25);
}

.admin-conv-foot {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.matrix-table th, .matrix-table td {
  padding: 6px 4px;
  text-align: center;
  border: 1px solid var(--border);
}

.matrix-table th {
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.matrix-table th:first-child, .matrix-table td:first-child {
  text-align: left;
  padding-left: 8px;
  white-space: nowrap;
}

.cell-locked { background: var(--bg); color: var(--text-mute); }
.cell-current { background: rgba(251, 191, 36, 0.1); color: var(--amber); }
.cell-solved { background: rgba(74, 222, 128, 0.1); color: var(--green); }
.cell-detail { font-size: 9px; color: var(--text-dim); display: block; margin-top: 2px; }

.token-popup {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 13, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: fadein 0.2s;
}

.token-popup.hidden { display: none; }

.token-popup-card {
  background: var(--bg-card);
  border: 1px solid var(--green);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  min-width: 340px;
  box-shadow: var(--shadow-lg), 0 0 40px var(--green-glow);
  animation: success-in 0.3s var(--t-slow);
}

.token-popup-card h3 {
  margin: 0 0 16px 0;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 500;
}

.token-popup-value {
  font-family: var(--display);
  font-size: 52px;
  color: var(--green);
  letter-spacing: 0.22em;
  margin: 12px 0 28px 0;
  text-shadow: 0 0 20px var(--green-glow);
  font-variant-numeric: tabular-nums;
}

.token-popup-actions { display: flex; gap: 10px; justify-content: center; }

/* ============ CHEATSHEET MODAL ============ */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(11, 15, 13, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
  animation: fadein 0.2s;
}

.modal.hidden { display: none; }

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--green);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(74, 222, 128, 0.15);
  animation: success-in 0.3s var(--t-slow);
  overflow: hidden;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-family: var(--display);
  color: var(--green);
  margin: 0;
  font-size: 16px;
}

.modal-title::before { content: '$ '; }

.modal-body {
  padding: 20px 28px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.6;
}

.modal-body h1, .modal-body h2, .modal-body h3, .modal-body h4 {
  font-family: var(--display);
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--green);
}

.modal-body h1 { font-size: 20px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.modal-body h2 { font-size: 16px; color: var(--amber); }
.modal-body h3 { font-size: 14px; color: var(--text); }
.modal-body h4 { font-size: 13px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }

.modal-body p { margin: 8px 0; }

.modal-body ul, .modal-body ol {
  margin: 8px 0;
  padding-left: 22px;
}

.modal-body li { margin-bottom: 4px; }

.modal-body code {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
  color: var(--violet);
}

.modal-body pre {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  padding: 12px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 12px;
  margin: 10px 0;
}

.modal-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text);
  white-space: pre;
}

.modal-body blockquote {
  border-left: 3px solid var(--amber);
  background: rgba(251, 191, 36, 0.06);
  margin: 10px 0;
  padding: 8px 14px;
  color: var(--amber);
  font-style: italic;
}

.modal-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
  font-size: 12px;
}

.modal-body th, .modal-body td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
}

.modal-body th {
  background: var(--bg-elev);
  color: var(--text-dim);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.modal-body hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 22px 0;
}

.modal-body strong { color: var(--text); font-weight: 700; }
.modal-body em { color: var(--text-dim); }
.modal-body a { color: var(--blue); text-decoration: none; }
.modal-body a:hover { text-decoration: underline; }

/* Tabs (Élèves / Démo) */
.tabbar {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
  padding: 3px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.tab {
  flex: 1;
  padding: 7px 10px;
  text-align: center;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
  font-weight: 500;
  transition: all var(--t-fast);
}

.tab:hover { color: var(--text); background: var(--bg-hover); }
.tab.active {
  color: var(--green);
  background: var(--bg-card);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 0 0 1px var(--green);
}

/* Demo banner */
.demo-banner {
  background: rgba(192, 132, 252, 0.1);
  border: 1px solid var(--violet);
  color: var(--violet);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 12px;
  margin-bottom: 14px;
  text-align: center;
}

/* Section divider */
.section { margin-top: 28px; }
.section-title {
  font-family: var(--display);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* Misc */
.spacer { flex: 1; }
.row { display: flex; gap: 10px; align-items: center; }
.row-end { display: flex; gap: 10px; align-items: center; justify-content: flex-end; }
.hidden { display: none !important; }
.muted { color: var(--text-dim); }
.tiny { font-size: 11px; }

/* Responsive */
@media (max-width: 1100px) {
  .admin-grid {
    grid-template-columns: 300px 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
    height: auto;
    min-height: calc(100vh - 100px);
  }
  .admin-col-progress { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 13px; }
  .shell, .shell-wide { padding: 14px; }
  .header { flex-wrap: wrap; gap: 10px; }
  .admin-grid {
    grid-template-columns: 1fr;
    height: auto;
    gap: 10px;
  }
  .admin-col { max-height: 60vh; }
  .levels-grid { grid-template-columns: 1fr; gap: 12px; }
  .chat-shell { padding: 10px; height: calc(100vh - 30px); gap: 10px; }
  .chat-header { font-size: 14px; }
  .chat-meta { font-size: 11px; gap: 6px; }
  .bubble { max-width: 92%; }
  .verify-box { padding: 12px; }
  .success-banner h1 { font-size: 36px; }
  .token-popup-value { font-size: 36px; letter-spacing: 0.18em; }
  .token-popup-card { padding: 28px; min-width: auto; }
}

/* Préférence mouvement réduit : on désactive les animations décoratives */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Touch targets : assure 40px min sur mobile */
@media (max-width: 720px) {
  button, .btn, .tab, .session-item {
    min-height: 40px;
  }
  .btn-sm { min-height: 32px; }
}

/* Utilitaires complémentaires */
.text-right { text-align: right; }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }