:root {
  --bg: #12101c;
  --bg-elevated: #1c1930;
  --bg-card: #221e3a;
  --border: #34304f;
  --primary: #8b5cf6;
  --primary-hover: #7c3aed;
  --secondary: #ec4899;
  --text: #f1eef9;
  --text-dim: #a29bc4;
  --success: #22c55e;
  --error: #f87171;
  --radius: 14px;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 0%, #251f45 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

.screen { display: none; min-height: 100vh; }
.screen.active { display: block; }

.btn {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: transform .08s ease, background .15s ease, opacity .15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: var(--bg-elevated); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--primary); }
.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: var(--text); }
.btn-block { width: 100%; }
.btn-large { padding: 16px; font-size: 1.1rem; }
.btn-small { padding: 6px 12px; font-size: 0.85rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ===== Auth ===== */
#screen-auth.active { display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 400px;
}
.brand { text-align: center; margin-bottom: 24px; }
.brand-emoji { font-size: 2.8rem; }
.brand h1 { margin: 8px 0 4px; font-size: 1.6rem; }
.tagline { color: var(--text-dim); margin: 0; font-size: .9rem; }

.tabs { display: flex; gap: 8px; margin-bottom: 20px; background: var(--bg-elevated); border-radius: 10px; padding: 4px; }
.tab-btn {
  flex: 1; padding: 10px; border: none; background: transparent; color: var(--text-dim);
  border-radius: 8px; cursor: pointer; font-weight: 600; font-family: inherit;
}
.tab-btn.active { background: var(--primary); color: #fff; }

.auth-form { display: none; flex-direction: column; gap: 14px; }
.auth-form.active { display: flex; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: .85rem; color: var(--text-dim); }
.auth-form input {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 12px; color: var(--text); font-size: 1rem; font-family: inherit;
}
.auth-form input:focus { outline: none; border-color: var(--primary); }
.form-error { color: var(--error); font-size: .85rem; min-height: 1.2em; margin: 0; }

/* ===== Topbar ===== */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border); background: var(--bg-elevated);
}
.topbar-brand { font-weight: 700; font-size: 1.1rem; display: flex; align-items: center; gap: 6px; }
.topbar-user { display: flex; align-items: center; gap: 12px; color: var(--text-dim); font-size: .9rem; }

/* ===== Home ===== */
.home-main { max-width: 900px; margin: 0 auto; padding: 40px 20px; text-align: center; }
.home-main h2 { font-size: 1.8rem; margin-bottom: 6px; }
.home-sub { color: var(--text-dim); margin-bottom: 32px; }
.home-actions { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; text-align: left; }
@media (max-width: 1000px) { .home-actions { grid-template-columns: 1fr 1fr; } }
@media (max-width: 700px) { .home-actions { grid-template-columns: 1fr; } }
.home-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; display: flex; flex-direction: column; gap: 12px;
}
.home-card h3 { margin: 0; }
.home-card p { color: var(--text-dim); margin: 0; font-size: .9rem; flex: 1; }
.code-input {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 12px; color: var(--text); font-size: 1.1rem; text-align: center;
  letter-spacing: 3px; text-transform: uppercase; font-family: inherit; font-weight: 700;
}
.solo-debug-wrap {
  display: flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--text-dim);
  background: var(--bg-elevated); border: 1px dashed var(--border); border-radius: 8px; padding: 8px 10px;
}
.public-rooms-list { display: flex; flex-direction: column; gap: 8px; min-height: 40px; }
.public-rooms-empty { color: var(--text-dim); font-size: .85rem; margin: 0; }
.public-room-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; font-size: .85rem;
}
.public-room-row .prr-info { display: flex; flex-direction: column; gap: 2px; }
.public-room-row .prr-host { font-weight: 600; }
.public-room-row .prr-count { color: var(--text-dim); font-size: .78rem; }

/* ===== Lobby ===== */
.lobby-main { max-width: 760px; margin: 0 auto; padding: 28px 20px 60px; }
.lobby-code-box {
  text-align: center; background: var(--bg-card); border: 1px dashed var(--primary);
  border-radius: var(--radius); padding: 18px; margin-bottom: 24px;
}
.lobby-code-label { display: block; font-size: .75rem; letter-spacing: 2px; color: var(--text-dim); margin-bottom: 4px; }
.lobby-code { font-size: 2rem; font-weight: 800; letter-spacing: 6px; color: var(--secondary); }

.lobby-players { margin-bottom: 24px; }
.lobby-players h3 { margin-bottom: 10px; }
.player-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.player-list li {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 20px;
  padding: 8px 14px; font-size: .9rem; display: flex; align-items: center; gap: 6px;
}
.player-list li.is-host::before { content: "👑"; }
.player-list li.is-me { border-color: var(--primary); }

.lobby-settings h3 { margin-bottom: 12px; }
.theme-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; margin-bottom: 24px; }
.theme-opt {
  background: var(--bg-elevated); border: 2px solid var(--border); border-radius: 10px;
  padding: 14px 8px; text-align: center; cursor: pointer; font-size: .85rem;
}
.theme-opt .emoji { font-size: 1.6rem; display: block; margin-bottom: 4px; }
.theme-opt { position: relative; }
.theme-opt.selected { border-color: var(--primary); background: rgba(139,92,246,0.15); }
.theme-opt.selected::after {
  content: "✓"; position: absolute; top: 4px; right: 6px; color: var(--primary);
  font-weight: 800; font-size: .8rem;
}

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 28px; }
@media (max-width: 600px) { .settings-grid { grid-template-columns: 1fr; } }
.setting-group h4 { margin: 0 0 8px; font-size: .85rem; color: var(--text-dim); font-weight: 600; }
.pill-options { display: flex; flex-wrap: wrap; gap: 8px; }
.pill-opt {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 20px;
  padding: 8px 14px; font-size: .85rem; cursor: pointer; color: var(--text);
}
.pill-opt.selected { background: var(--primary); border-color: var(--primary); }

.lobby-wait-msg { text-align: center; color: var(--text-dim); }

/* ===== Game ===== */
.game-topbar { justify-content: space-around; }
.game-round, .game-tiles-count { font-weight: 600; color: var(--text-dim); }
.game-timer { font-weight: 800; font-size: 1.3rem; color: var(--secondary); }

.game-main { display: flex; gap: 20px; padding: 20px; max-width: 1300px; margin: 0 auto; align-items: flex-start; flex-wrap: wrap; }
.game-board-wrap { flex: 2; min-width: 300px; display: flex; justify-content: center; }
.game-board {
  display: grid; width: min(80vh, 640px); max-width: 90vw; max-height: 80vh;
  aspect-ratio: 1 / 1; /* valeur par défaut, ajustée en JS selon l'image du round */
  background-size: cover; background-position: center;
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
  opacity: 1; transition: opacity .25s ease;
}
.game-board.board-loading { opacity: 0; }
.tile {
  background: var(--bg-elevated);
  border: 0.5px solid rgba(0,0,0,0.15);
  transition: opacity .35s ease;
}
.tile.revealed { opacity: 0; pointer-events: none; }

.game-side { flex: 1; min-width: 280px; display: flex; flex-direction: column; gap: 14px; max-height: 80vh; }
.scoreboard { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 12px; display: flex; flex-direction: column; gap: 6px; }
.score-row { display: flex; justify-content: space-between; font-size: .9rem; }
.score-row .rank { color: var(--text-dim); margin-right: 6px; }

.chat-feed {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px; flex: 1; overflow-y: auto; min-height: 200px; display: flex; flex-direction: column; gap: 6px;
}
.chat-msg { font-size: .88rem; padding: 6px 10px; border-radius: 8px; background: var(--bg-elevated); }
.chat-msg .author { font-weight: 700; margin-right: 6px; }
.chat-msg.correct { background: rgba(34,197,94,0.18); border: 1px solid var(--success); }
.chat-msg.correct .author::after { content: " ✅"; }

.guess-form { display: flex; gap: 8px; }
.guess-form input {
  flex: 1; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; color: var(--text); font-family: inherit; font-size: 1rem;
}
.guess-form input:focus { outline: none; border-color: var(--primary); }

.overlay {
  position: fixed; inset: 0; background: rgba(10,8,20,0.85); display: flex;
  align-items: center; justify-content: center; z-index: 50; padding: 20px;
}
.overlay-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; max-width: 480px; width: 100%; text-align: center;
}
.overlay-card h2 { margin-top: 0; }
#round-end-winners { display: flex; flex-direction: column; gap: 8px; margin: 16px 0; text-align: left; }

#toast-container { position: fixed; top: 16px; right: 16px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-card); border: 1px solid var(--border); border-left: 4px solid var(--primary);
  padding: 12px 16px; border-radius: 8px; font-size: .9rem; box-shadow: 0 4px 12px rgba(0,0,0,.3);
  animation: slidein .2s ease;
}
.toast.error { border-left-color: var(--error); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }