/* ── Solitaire — Emerald Felt Theme ── */
:root {
    --sol-accent: #166534;
    --sol-accent-light: #4ADE80;
    --sol-accent-dark: #052E16;
    --sol-glow: rgba(74, 222, 128, 0.45);
    --sol-bg: #061B10;
    --sol-felt: #0F3D24;
    --sol-felt-light: #1B5E37;
    --sol-surface: #0F2A1B;
    --sol-surface-light: #1A3D2A;
    --sol-text: #ECFDF5;
    --sol-text-dim: #86C7A1;
    --sol-card-bg: #F8FAFC;
    --sol-card-back: linear-gradient(135deg, #166534 0%, #052E16 100%);
    --sol-red: #DC2626;
    --sol-black: #0F172A;
    --sol-gold: #FACC15;
    --sol-success: #4ADE80;
}

/* ── Layout ── */
.sol-layout {
    display: flex;
    justify-content: center;
    gap: 20px;
    max-width: 1400px;
    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(--sol-surface);
    border: 1px dashed var(--sol-text-dim);
    display: flex; align-items: center; justify-content: center;
    color: var(--sol-text-dim); font-size: 12px; border-radius: 8px;
}

#solitaire-app {
    flex: 1;
    max-width: 920px;
    min-width: 320px;
    color: var(--sol-text);
}

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

/* ── Header ── */
.sol-header {
    text-align: center;
    padding: 36px 0 24px;
}
.sol-logo { margin-bottom: 16px; }
.sol-logo-cards {
    display: inline-flex;
    gap: -16px;
}
.sol-mini-card {
    width: 50px; height: 70px;
    background: var(--sol-card-bg);
    border-radius: 8px;
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    border: 1px solid #cbd5e1;
    margin-left: -14px;
    transition: transform 0.3s ease;
}
.sol-mini-card:first-child { margin-left: 0; transform: rotate(-8deg); }
.sol-mini-card:nth-child(2) { transform: rotate(-3deg) translateY(-4px); }
.sol-mini-card:nth-child(3) { transform: rotate(3deg) translateY(-4px); }
.sol-mini-card:nth-child(4) { transform: rotate(8deg); }
.sol-mini-card.red { color: var(--sol-red); }
.sol-mini-card.black { color: var(--sol-black); }
.sol-header h1 {
    font-family: 'Syne', sans-serif;
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--sol-accent-light);
    letter-spacing: 6px;
    margin: 12px 0 0;
    text-shadow: 0 0 24px var(--sol-glow);
}
.subtitle {
    color: var(--sol-text-dim);
    font-size: 1rem;
    margin-top: 8px;
}

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

/* ── Difficulty ── */
.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}
.diff-btn {
    background: var(--sol-surface-light);
    border: 1.5px solid transparent;
    color: var(--sol-text);
    padding: 16px 10px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.9rem;
}
.diff-btn:hover { transform: translateY(-2px); border-color: var(--sol-accent-light); }
.diff-btn.selected {
    background: linear-gradient(135deg, var(--sol-accent-dark), var(--sol-accent));
    border-color: var(--sol-accent-light);
    box-shadow: 0 0 16px rgba(74, 222, 128, 0.3);
}
.diff-icon {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--sol-accent-light);
}
.diff-btn.selected .diff-icon { color: #fff; }
.diff-desc { font-size: 0.72rem; color: var(--sol-text-dim); }
.diff-btn.selected .diff-desc { color: rgba(255,255,255,0.85); }

/* ── Rules ── */
.sol-rules {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--sol-text-dim);
    font-size: 0.92rem;
    line-height: 1.7;
}
.sol-rules li + li { margin-top: 6px; }

/* ── Buttons ── */
.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, background 0.15s ease;
    font-size: 0.95rem;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
    background: linear-gradient(135deg, var(--sol-accent), var(--sol-accent-light));
    color: #fff;
    box-shadow: 0 6px 18px rgba(22, 101, 52, 0.4);
}
.btn--primary:hover { box-shadow: 0 10px 24px rgba(22, 101, 52, 0.55); }
.btn--outline {
    background: transparent;
    border: 1.5px solid var(--sol-accent-light);
    color: var(--sol-accent-light);
}
.btn--outline:hover { background: rgba(74, 222, 128, 0.12); }
.btn--ghost { background: transparent; color: var(--sol-text-dim); }
.btn--ghost:hover { color: var(--sol-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 ── */
#game-hud {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    background: var(--sol-surface);
    padding: 14px;
    border-radius: 12px;
    border: 1px solid var(--sol-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(--sol-text-dim);
}
.hud__value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--sol-accent-light);
}
.hud__timer { color: var(--sol-gold); }

/* ── Board ── */
.sol-board {
    background: var(--sol-felt);
    background-image:
        radial-gradient(ellipse at top, var(--sol-felt-light), transparent 70%),
        repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(0,0,0,0.03) 8px, rgba(0,0,0,0.03) 9px);
    border-radius: 18px;
    padding: 20px;
    border: 2px solid var(--sol-accent-dark);
    box-shadow: 0 14px 40px rgba(0,0,0,0.5), inset 0 0 60px rgba(0,0,0,0.4);
}
.sol-top-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
}
.sol-stock-area {
    display: flex;
    gap: 10px;
}
.sol-foundations {
    display: flex;
    gap: 10px;
}
.sol-tableau {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    min-height: 400px;
}

/* ── Pile ── */
.sol-pile {
    width: 78px;
    height: 110px;
    border-radius: 8px;
    background: rgba(0,0,0,0.18);
    border: 1.5px dashed rgba(255,255,255,0.15);
    position: relative;
}
.sol-pile--foundation::before {
    content: attr(data-suit);
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: rgba(255,255,255,0.12);
    font-family: serif;
}
.sol-pile--stock {
    cursor: pointer;
}
.sol-pile--stock.empty::after {
    content: "↻";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--sol-text-dim);
}
.sol-col {
    min-height: 110px;
    position: relative;
}

/* ── Cards ── */
.sol-card {
    width: 78px;
    height: 110px;
    border-radius: 8px;
    background: var(--sol-card-bg);
    border: 1px solid #cbd5e1;
    position: absolute;
    left: 0;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
    padding: 6px;
    box-sizing: border-box;
    font-family: 'DM Sans', sans-serif;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    user-select: none;
}
.sol-card.top-card { /* clickable top */
    cursor: grab;
}
.sol-card.face-down {
    background: var(--sol-card-back);
    background-image:
        var(--sol-card-back),
        repeating-linear-gradient(45deg, transparent, transparent 6px, rgba(255,255,255,0.08) 6px, rgba(255,255,255,0.08) 7px);
    border-color: var(--sol-accent-dark);
}
.sol-card.face-down::after {
    content: "";
    position: absolute;
    inset: 6px;
    border-radius: 4px;
    border: 2px solid rgba(255,255,255,0.15);
}
.sol-card.red { color: var(--sol-red); }
.sol-card.black { color: var(--sol-black); }
.sol-card-rank {
    font-weight: 800;
    font-size: 1.05rem;
    line-height: 1;
}
.sol-card-suit {
    font-size: 1.1rem;
    line-height: 1;
}
.sol-card-corner {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1px;
}
.sol-card-center {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
}
.sol-card-corner.bottom {
    position: absolute;
    right: 6px;
    bottom: 6px;
    transform: rotate(180deg);
    align-items: flex-start;
}
.sol-card.selected {
    box-shadow: 0 0 0 3px var(--sol-gold), 0 8px 18px rgba(0,0,0,0.4);
    transform: translateY(-6px);
    z-index: 100;
}
.sol-card.hint {
    box-shadow: 0 0 0 3px var(--sol-accent-light);
}
@keyframes solCardFlip {
    0% { transform: scale(0.9); }
    100% { transform: scale(1); }
}
.sol-card.placed { animation: solCardFlip 0.2s ease; }

/* tableau cascading offsets */
.sol-col .sol-card { top: 0; }
.sol-col .sol-card.face-down + .sol-card { top: 22px; }

/* ── Actions ── */
.sol-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

/* ── Result Card ── */
.result-card, .lb-card {
    background: var(--sol-surface);
    border-radius: 16px;
    padding: 36px 28px;
    border: 1px solid var(--sol-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(--sol-accent-light);
    letter-spacing: 4px;
    margin: 0 0 12px;
    text-shadow: 0 0 24px var(--sol-glow);
}
.result-score {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    font-weight: 700;
    color: var(--sol-gold);
    margin: 8px 0;
}
.result-detail {
    color: var(--sol-text-dim);
    font-size: 0.95rem;
    margin-bottom: 18px;
    line-height: 1.6;
}
#nickname {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    background: var(--sol-bg);
    color: var(--sol-text);
    border: 1.5px solid var(--sol-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(--sol-accent-light); }
.result-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 10px;
}

/* ── Leaderboard ── */
.lb-card h2 {
    font-family: 'Syne', sans-serif;
    color: var(--sol-accent-light);
    letter-spacing: 4px;
    margin-bottom: 18px;
    text-shadow: 0 0 24px var(--sol-glow);
}
#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(--sol-bg);
    margin-bottom: 6px;
    border-radius: 8px;
    border: 1px solid var(--sol-surface-light);
    font-family: 'DM Sans', sans-serif;
}
#leaderboard-list li::before {
    content: counter(lb);
    color: var(--sol-accent-light);
    font-weight: 700;
    margin-right: 10px;
    min-width: 24px;
}
#leaderboard-list li:nth-child(1) { border-color: var(--sol-gold); }
#leaderboard-list li:nth-child(1)::before { color: var(--sol-gold); }
.lb-score {
    font-family: 'JetBrains Mono', monospace;
    color: var(--sol-accent-light);
    font-weight: 600;
}

/* ── Responsive ── */
@media (max-width: 1100px) {
    .sol-pile, .sol-card { width: 64px; height: 92px; }
}
@media (max-width: 900px) {
    .sol-layout { flex-direction: column; padding: 12px; }
    .ad-slot { width: 100%; }
    .ad-placeholder--vertical { width: 100%; height: 90px; }
    .sol-header h1 { font-size: 2rem; letter-spacing: 3px; }
    .sol-board { padding: 12px; }
    .sol-top-row { flex-direction: column; gap: 12px; align-items: center; }
    .sol-foundations, .sol-stock-area { gap: 6px; }
    .sol-pile, .sol-card { width: 44px; height: 64px; padding: 3px; border-radius: 5px; }
    .sol-card-rank { font-size: 0.75rem; }
    .sol-card-suit { font-size: 0.78rem; }
    .sol-card-center { font-size: 1.3rem; }
    .sol-tableau { gap: 6px; min-height: 280px; }
    .sol-col .sol-card.face-down + .sol-card { top: 14px; }
    #game-hud { grid-template-columns: repeat(2, 1fr); }
}