/* Codebreaker — Deep Red */
:root {
    --cb-accent: #DC2626;
    --cb-accent-light: #F87171;
    --cb-accent-dark: #7F1D1D;
    --cb-bg: #160806;
    --cb-surface: #24100D;
    --cb-surface-light: #341714;
    --cb-text: #FAEAEA;
    --cb-text-dim: #C39A9A;
    --cb-gold: #FACC15;

    --c1: #dc2626;
    --c2: #f97316;
    --c3: #fbbf24;
    --c4: #22c55e;
    --c5: #0ea5e9;
    --c6: #8b5cf6;
    --c7: #ec4899;
    --c8: #ffffff;
}

.cb-layout { display: flex; justify-content: center; gap: 20px; max-width: 1200px; margin: 0 auto; padding: 20px; min-height: calc(100vh - 80px); }
.ad-slot { width: 160px; flex-shrink: 0; }
.ad-slot--left, .ad-slot--right { display: flex; align-items: flex-start; }
.ad-placeholder--vertical { width: 160px; height: 600px; background: var(--cb-surface); border: 1px dashed var(--cb-text-dim); display: flex; align-items: center; justify-content: center; color: var(--cb-text-dim); font-size: 12px; border-radius: 8px; }

#codebreaker-app { flex: 1; max-width: 580px; min-width: 320px; color: var(--cb-text); }

.screen { display: none; }
.screen.active { display: block; animation: cbFade 0.3s ease; }
@keyframes cbFade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.cb-header { text-align: center; padding: 36px 0 24px; }
.cb-logo { display: inline-flex; gap: 6px; padding: 12px 16px; background: var(--cb-surface); border: 1px solid var(--cb-surface-light); border-radius: 14px; margin-bottom: 14px; }
.cb-logo .cb-peg { width: 22px; height: 22px; border-radius: 50%; box-shadow: inset 0 0 6px rgba(255,255,255,0.4), 0 0 12px rgba(220,38,38,0.4); }
.cb-header h1 { font-family: 'Syne', sans-serif; font-size: 2.2rem; font-weight: 800; color: var(--cb-accent-light); letter-spacing: 4px; margin: 0; text-shadow: 0 0 24px rgba(220,38,38,0.55); }
.subtitle { color: var(--cb-text-dim); font-size: 1rem; margin-top: 8px; }

.card { background: var(--cb-surface); border-radius: 14px; padding: 20px; margin-bottom: 16px; border: 1px solid var(--cb-surface-light); }
.card__title { font-family: 'Syne', sans-serif; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; color: var(--cb-accent-light); margin-bottom: 14px; }

.diff-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.diff-btn { background: var(--cb-surface-light); border: 1.5px solid transparent; color: var(--cb-text); padding: 14px 8px; border-radius: 10px; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 4px; font-family: 'DM Sans', sans-serif; font-size: 0.85rem; transition: transform 0.12s ease, border-color 0.12s ease; }
.diff-btn:hover { transform: translateY(-2px); border-color: var(--cb-accent); }
.diff-btn.selected { background: linear-gradient(135deg, var(--cb-accent-dark), var(--cb-accent)); border-color: var(--cb-accent-light); }
.diff-icon { font-family: 'JetBrains Mono', monospace; font-size: 0.95rem; font-weight: 700; color: var(--cb-accent-light); }
.diff-btn.selected .diff-icon { color: #fff; }
.diff-desc { font-size: 0.72rem; color: var(--cb-text-dim); }
.diff-btn.selected .diff-desc { color: rgba(255,255,255,0.85); }

.cb-rules { margin: 0; padding-left: 1.1rem; color: var(--cb-text-dim); font-size: 0.92rem; line-height: 1.6; }
.cb-rules li + li { margin-top: 6px; }

.btn { font-family: 'DM Sans', sans-serif; font-weight: 600; border-radius: 10px; border: none; cursor: pointer; padding: 12px 22px; transition: transform 0.12s ease, box-shadow 0.12s ease; font-size: 0.95rem; }
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn--primary { background: linear-gradient(135deg, var(--cb-accent), #f97316); color: #fff; box-shadow: 0 6px 18px rgba(220,38,38,0.35); }
.btn--primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn--outline { background: transparent; border: 1.5px solid var(--cb-accent); color: var(--cb-accent-light); }
.btn--outline:hover { background: rgba(220,38,38,0.12); }
.btn--ghost { background: transparent; color: var(--cb-text-dim); }
.btn--ghost:hover { color: var(--cb-accent-light); }
.btn--lg { padding: 16px 36px; font-size: 1.05rem; }
.btn--sm { padding: 8px 14px; font-size: 0.85rem; }
.menu-actions { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-top: 18px; }

#game-hud { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; background: var(--cb-surface); padding: 14px; border-radius: 12px; border: 1px solid var(--cb-surface-light); margin-bottom: 18px; }
.hud__cell { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hud__label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--cb-text-dim); }
.hud__value { font-family: 'JetBrains Mono', monospace; font-size: 1.3rem; font-weight: 700; color: var(--cb-accent-light); }

.cb-board {
    background: var(--cb-surface);
    border: 1px solid var(--cb-surface-light);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 18px 40px rgba(0,0,0,0.5);
}
.cb-rows {
    display: flex;
    flex-direction: column-reverse;
    gap: 6px;
}
.cb-row {
    display: grid;
    grid-template-columns: auto 80px;
    align-items: center;
    gap: 12px;
    background: rgba(0,0,0,0.2);
    padding: 8px;
    border-radius: 10px;
}
.cb-row.future { opacity: 0.4; }
.cb-row-pegs {
    display: flex; gap: 8px; justify-content: center;
}
.cb-peg-slot {
    width: 30px; height: 30px;
    border-radius: 50%;
    border: 2px solid var(--cb-surface-light);
    background: var(--cb-bg);
    transition: background 0.15s ease;
}
.cb-peg-slot.filled { box-shadow: inset 0 0 8px rgba(255,255,255,0.4), 0 0 8px rgba(0,0,0,0.4); border: none; }
.cb-feedback {
    display: grid; grid-template-columns: repeat(5, 1fr);
    gap: 3px; padding: 4px; background: var(--cb-bg);
    border-radius: 6px;
    min-height: 30px;
    align-items: center;
}
.cb-fb-peg {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--cb-surface-light);
    justify-self: center;
}
.cb-fb-peg.black { background: #111; border-color: #111; box-shadow: 0 0 6px rgba(0,0,0,0.6); }
.cb-fb-peg.white { background: #f8fafc; border-color: #f8fafc; box-shadow: 0 0 6px rgba(248,250,252,0.6); }

.cb-secret {
    margin-top: 12px;
    background: rgba(0,0,0,0.3);
    border: 1px dashed var(--cb-accent);
    padding: 10px;
    border-radius: 10px;
    display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.cb-secret-label {
    color: var(--cb-accent-light);
    font-family: 'Syne', sans-serif;
    font-size: 0.75rem;
    letter-spacing: 3px;
}
.cb-secret-pegs { display: flex; gap: 8px; }
.cb-secret-pegs .cb-peg-slot { background: var(--cb-accent-dark); }

.cb-current-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 12px;
    background: var(--cb-surface);
    padding: 12px;
    border-radius: 12px;
    border: 1.5px solid var(--cb-accent);
    margin-top: 14px;
}
.cb-current-pegs { display: flex; gap: 8px; justify-content: center; }
.cb-current-pegs .cb-peg-slot { width: 38px; height: 38px; cursor: pointer; transition: transform 0.1s ease; }
.cb-current-pegs .cb-peg-slot:hover { transform: scale(1.08); }
.cb-current-pegs .cb-peg-slot.active { box-shadow: 0 0 0 3px var(--cb-accent-light); }

.cb-palette {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 14px;
    flex-wrap: wrap;
}
.cb-color {
    width: 38px; height: 38px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.1s ease, border-color 0.1s ease;
    box-shadow: inset 0 0 8px rgba(255,255,255,0.4);
}
.cb-color:hover { transform: scale(1.1); }
.cb-color.selected { border-color: var(--cb-accent-light); box-shadow: 0 0 12px var(--cb-accent-light), inset 0 0 8px rgba(255,255,255,0.5); }

.cb-actions { display: flex; justify-content: center; gap: 10px; margin-top: 16px; }

.result-card, .lb-card { background: var(--cb-surface); border-radius: 16px; padding: 36px 28px; border: 1px solid var(--cb-surface-light); text-align: center; max-width: 480px; margin: 40px auto; box-shadow: 0 18px 36px rgba(0,0,0,0.4); }
.result-card h2 { font-family: 'Syne', sans-serif; font-size: 2rem; color: var(--cb-accent-light); letter-spacing: 4px; margin: 0 0 12px; text-shadow: 0 0 24px rgba(220,38,38,0.5); }
.result-score { font-family: 'JetBrains Mono', monospace; font-size: 3rem; font-weight: 700; color: var(--cb-gold); margin: 8px 0; }
.result-detail { color: var(--cb-text-dim); font-size: 0.95rem; margin-bottom: 18px; line-height: 1.6; }
#nickname { width: 100%; padding: 12px 14px; border-radius: 10px; background: var(--cb-bg); color: var(--cb-text); border: 1.5px solid var(--cb-surface-light); font-family: 'DM Sans', sans-serif; font-size: 0.95rem; margin-bottom: 12px; box-sizing: border-box; }
#nickname:focus { outline: none; border-color: var(--cb-accent); }
.result-actions { display: flex; gap: 10px; justify-content: center; margin-bottom: 10px; }

.lb-card h2 { font-family: 'Syne', sans-serif; color: var(--cb-accent-light); letter-spacing: 4px; margin-bottom: 18px; }
#leaderboard-list { list-style: none; padding: 0; margin: 0 0 16px; text-align: left; counter-reset: lb; }
#leaderboard-list li { counter-increment: lb; display: flex; justify-content: space-between; padding: 10px 14px; background: var(--cb-bg); margin-bottom: 6px; border-radius: 8px; border: 1px solid var(--cb-surface-light); }
#leaderboard-list li::before { content: counter(lb); color: var(--cb-accent-light); font-weight: 700; margin-right: 10px; min-width: 24px; }
#leaderboard-list li:nth-child(1) { border-color: var(--cb-gold); }
#leaderboard-list li:nth-child(1)::before { color: var(--cb-gold); }
#leaderboard-list .lb-score { font-family: 'JetBrains Mono', monospace; color: var(--cb-accent-light); font-weight: 600; }

@media (max-width: 900px) {
    .cb-layout { flex-direction: column; padding: 12px; }
    .ad-slot { width: 100%; }
    .ad-placeholder--vertical { width: 100%; height: 90px; }
    .cb-peg-slot { width: 24px; height: 24px; }
    .cb-current-pegs .cb-peg-slot { width: 32px; height: 32px; }
    .cb-color { width: 32px; height: 32px; }
}