/* Jewel Run — Royal Purple */
:root {
    --jr-accent: #7C3AED;
    --jr-accent-light: #C4B5FD;
    --jr-accent-dark: #5B21B6;
    --jr-glow: rgba(124, 58, 237, 0.55);
    --jr-bg: #0E0820;
    --jr-surface: #1A1138;
    --jr-surface-light: #261A4D;
    --jr-text: #F1ECFF;
    --jr-text-dim: #9C8FCC;
    --jr-success: #34D399;
    --jr-gold: #FBBF24;
    --jr-danger: #F87171;
}

.jr-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(--jr-surface);
    border: 1px dashed var(--jr-text-dim); display: flex; align-items: center;
    justify-content: center; color: var(--jr-text-dim); font-size: 12px; border-radius: 8px;
}
#jewelrun-app { flex: 1; max-width: 720px; min-width: 320px; color: var(--jr-text); }

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

.jr-header { text-align: center; padding: 36px 0 24px; }
.jr-logo { display: flex; justify-content: center; gap: 12px; margin-bottom: 14px; }
.jr-gem {
    display: inline-block; font-size: 2.6rem; transform: rotate(45deg);
    filter: drop-shadow(0 0 14px var(--jr-glow));
    animation: jrSpin 4s ease-in-out infinite;
}
.jr-gem:nth-child(2) { animation-delay: 0.3s; }
.jr-gem:nth-child(3) { animation-delay: 0.6s; }
.jr-gem--red { color: #EF4444; }
.jr-gem--green { color: #34D399; }
.jr-gem--blue { color: #60A5FA; }
@keyframes jrSpin { 0%,100% { transform: rotate(45deg) scale(1); } 50% { transform: rotate(45deg) scale(1.18); } }

.jr-header h1 {
    font-family: 'Syne', sans-serif; font-size: 2.6rem; font-weight: 800;
    color: var(--jr-accent-light); letter-spacing: 4px; margin: 0;
    text-shadow: 0 0 28px var(--jr-glow);
}
.subtitle { color: var(--jr-text-dim); margin-top: 8px; }

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

.difficulty-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.diff-btn {
    background: var(--jr-surface-light); border: 1.5px solid transparent;
    color: var(--jr-text); padding: 14px 8px; border-radius: 10px; cursor: pointer;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    transition: all 0.15s ease; font-family: 'DM Sans', sans-serif; font-size: 0.85rem;
}
.diff-btn:hover { transform: translateY(-2px); border-color: var(--jr-accent); }
.diff-btn.selected {
    background: linear-gradient(135deg, var(--jr-accent-dark), var(--jr-accent));
    border-color: var(--jr-accent-light); box-shadow: 0 0 16px var(--jr-glow);
}
.diff-icon { font-family: 'JetBrains Mono', monospace; font-size: 1rem; font-weight: 700; color: var(--jr-accent-light); }
.diff-btn.selected .diff-icon { color: #fff; }
.diff-desc { font-size: 0.7rem; color: var(--jr-text-dim); }
.diff-btn.selected .diff-desc { color: rgba(255,255,255,0.85); }

.jr-rules { margin: 0; padding-left: 1.1rem; color: var(--jr-text-dim); font-size: 0.92rem; line-height: 1.6; }
.jr-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 { transform: translateY(-1px); }
.btn--primary {
    background: linear-gradient(135deg, var(--jr-accent), var(--jr-accent-light));
    color: #fff; box-shadow: 0 6px 18px var(--jr-glow);
}
.btn--primary:hover { box-shadow: 0 10px 24px var(--jr-glow); }
.btn--outline { background: transparent; border: 1.5px solid var(--jr-accent); color: var(--jr-accent-light); }
.btn--outline:hover { background: rgba(124,58,237,0.12); }
.btn--ghost { background: transparent; color: var(--jr-text-dim); }
.btn--ghost:hover { color: var(--jr-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(5, 1fr); gap: 8px;
    background: var(--jr-surface); padding: 12px; border-radius: 12px;
    border: 1px solid var(--jr-surface-light); margin-bottom: 14px;
}
.hud__cell { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hud__label { font-size: 0.6rem; text-transform: uppercase; letter-spacing: 1px; color: var(--jr-text-dim); }
.hud__value { font-family: 'JetBrains Mono', monospace; font-size: 1.1rem; font-weight: 700; color: var(--jr-accent-light); }
.hud__hp { color: var(--jr-success); }
.hud__hp.low { color: var(--jr-danger); animation: jrPulse 0.8s ease-in-out infinite; }
.hud__gems { color: var(--jr-gold); }
.hud__time { color: var(--jr-accent-light); }
.hud__score { color: var(--jr-gold); }
@keyframes jrPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.jr-stage {
    background: var(--jr-bg); border-radius: 14px; padding: 8px;
    border: 1px solid var(--jr-surface-light); display: flex; justify-content: center;
    box-shadow: 0 14px 40px rgba(0,0,0,0.5);
}
#jr-canvas {
    background: #0A0418; border-radius: 8px; display: block;
    max-width: 100%; height: auto;
}

.jr-controls { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; gap: 12px; flex-wrap: wrap; }
.dpad { display: grid; grid-template-columns: repeat(3, 50px); grid-template-rows: repeat(3, 50px); gap: 4px; }
.dpad__btn {
    background: var(--jr-surface); color: var(--jr-accent-light);
    border: 1.5px solid var(--jr-surface-light); border-radius: 8px; cursor: pointer;
    font-family: 'JetBrains Mono', monospace; font-size: 1.1rem; transition: all 0.12s ease;
}
.dpad__btn:hover { background: var(--jr-accent-dark); color: #fff; }
.dpad__btn:active { transform: scale(0.92); }
.dpad__up { grid-column: 2; grid-row: 1; }
.dpad__left { grid-column: 1; grid-row: 2; }
.dpad__right { grid-column: 3; grid-row: 2; }
.dpad__down { grid-column: 2; grid-row: 3; }

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

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

@media (max-width: 900px) {
    .jr-layout { flex-direction: column; padding: 12px; }
    .ad-slot { width: 100%; }
    .ad-placeholder--vertical { width: 100%; height: 90px; }
    #game-hud { grid-template-columns: repeat(5, 1fr); }
    .difficulty-grid { grid-template-columns: repeat(3, 1fr); }
    .jr-header h1 { font-size: 2rem; letter-spacing: 2px; }
    .dpad { grid-template-columns: repeat(3, 44px); grid-template-rows: repeat(3, 44px); }
}