/* ==========================================================================
   DAILY SNAKE - 2026-08-14: STARRY NIGHT IMPRESSIONIST SERPENT
   Aesthetic: Van Gogh Post-Impressionism Oil Painting Canvas, Cobalt & Gold
   ========================================================================== */

:root {
    --bg-dark: #0a1128;
    --bg-canvas: #0c1836;
    --primary-gold: #ffc857;
    --primary-yellow: #ffee88;
    --cobalt-blue: #1d4ed8;
    --ultramarine: #1e3a8a;
    --star-cyan: #38bdf8;
    --emerald-green: #10b981;
    --crimson-accent: #ef4444;
    
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --text-gold: #fde047;

    --panel-glass: rgba(15, 23, 42, 0.75);
    --panel-border: rgba(255, 200, 87, 0.25);
    --panel-glow: rgba(56, 189, 248, 0.15);

    --font-heading: 'Playfair Display', 'Cinzel', serif;
    --font-body: 'Noto Sans SC', 'Outfit', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-body);
    overflow-x: hidden;
    position: relative;
}

/* Background Canvas Effects */
.starry-canvas-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 20%, #172554 0%, #0f172a 60%, #070a14 100%);
    z-index: -4;
}

.swirling-vector-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 200, 87, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
        repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.015) 0px, rgba(255, 255, 255, 0.015) 2px, transparent 2px, transparent 8px);
    z-index: -3;
    pointer-events: none;
}

.starry-glow-nebula {
    position: fixed;
    top: -10%;
    left: 50%;
    transform: translateX(-50%);
    width: 120vw;
    height: 60vh;
    background: radial-gradient(ellipse at center, rgba(30, 58, 138, 0.35) 0%, rgba(29, 78, 216, 0.15) 45%, transparent 80%);
    filter: blur(50px);
    z-index: -2;
    animation: nebulaPulse 12s infinite alternate ease-in-out;
}

@keyframes nebulaPulse {
    0% { opacity: 0.6; transform: translateX(-50%) scale(1); }
    100% { opacity: 0.9; transform: translateX(-50%) scale(1.1); }
}

/* Main Layout */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    max-width: 900px;
    margin: 0 auto;
}

/* Header Section */
.header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--panel-glass);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    margin-bottom: 12px;
}

.back-home-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-gold);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    padding: 8px 14px;
    background: rgba(255, 200, 87, 0.1);
    border: 1px solid rgba(255, 200, 87, 0.3);
    border-radius: 12px;
    transition: all 0.25s ease;
}

.back-home-btn:hover {
    background: rgba(255, 200, 87, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(255, 200, 87, 0.25);
}

.title-wrapper {
    text-align: center;
}

.main-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    letter-spacing: 1px;
    color: #ffffff;
    text-shadow: 0 0 12px rgba(255, 200, 87, 0.4);
}

.sub-highlight {
    font-size: 0.75rem;
    color: var(--primary-gold);
    display: inline-block;
    margin-left: 6px;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: scale(1.08);
}

/* Dashboard Section */
.main-content {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.dashboard {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.stat-card {
    background: var(--panel-glass);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.stat-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 800;
}

.card-blue .stat-value { color: var(--star-cyan); text-shadow: 0 0 10px rgba(56, 189, 248, 0.5); }
.card-gold .stat-value { color: var(--primary-gold); text-shadow: 0 0 10px rgba(255, 200, 87, 0.5); }
.card-star .stat-value { color: var(--primary-yellow); text-shadow: 0 0 10px rgba(255, 238, 136, 0.5); }

/* Energy Card & Progress Bar */
.energy-card {
    grid-column: span 1;
    align-items: stretch;
    justify-content: space-between;
}

.energy-bar-track {
    width: 100%;
    height: 10px;
    background: rgba(0, 0, 0, 0.4);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid rgba(255, 200, 87, 0.3);
    margin-top: 4px;
}

.energy-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #1d4ed8 0%, #38bdf8 50%, #ffc857 100%);
    box-shadow: 0 0 12px rgba(255, 200, 87, 0.8);
    transition: width 0.3s ease;
    border-radius: 6px;
}

/* Game Canvas Container */
.game-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    aspect-ratio: 1 / 1;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(29, 78, 216, 0.25);
    border: 2px solid var(--panel-border);
    background: #080f24;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background: transparent;
}

/* Vortex Overlay Indicator */
.starry-vortex-overlay {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.starry-vortex-overlay.active {
    opacity: 1;
    animation: vortexPulse 1.5s infinite alternate ease-in-out;
}

.vortex-badge {
    background: linear-gradient(90deg, rgba(29, 78, 216, 0.9), rgba(255, 200, 87, 0.95), rgba(56, 189, 248, 0.9));
    color: #050b1a;
    font-weight: 800;
    font-size: 0.82rem;
    padding: 8px 16px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(255, 200, 87, 0.6);
    letter-spacing: 0.5px;
}

@keyframes vortexPulse {
    0% { transform: translateX(-50%) scale(0.98); }
    100% { transform: translateX(-50%) scale(1.03); }
}

/* Overlay Screens (Start, Pause, GameOver) */
.overlay-screen {
    position: absolute;
    inset: 0;
    background: rgba(6, 11, 25, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 20;
}

.overlay-screen.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-card {
    width: 100%;
    max-width: 440px;
    background: rgba(15, 25, 50, 0.9);
    border: 1.5px solid var(--panel-border);
    border-radius: 24px;
    padding: 28px 24px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(56, 189, 248, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.art-icon-wrapper {
    margin-bottom: 12px;
    animation: iconFloat 4s ease-in-out infinite alternate;
}

@keyframes iconFloat {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-8px) rotate(5deg); }
}

.overlay-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    letter-spacing: 1.5px;
    color: var(--primary-gold);
    text-shadow: 0 0 16px rgba(255, 200, 87, 0.5);
    margin-bottom: 4px;
}

.overlay-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.rules-summary {
    width: 100%;
    background: rgba(0, 0, 0, 0.35);
    border-radius: 14px;
    padding: 12px 14px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: left;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.rule-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.8rem;
    line-height: 1.4;
    color: #e2e8f0;
}

.rule-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

/* Game Over Stats */
.gameover-stats {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.go-stat {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.go-stat span {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.go-stat strong {
    font-size: 1.25rem;
    color: var(--primary-gold);
    font-weight: 800;
}

.go-actions {
    display: flex;
    gap: 12px;
    width: 100%;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 14px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, #1d4ed8 0%, #38bdf8 50%, #ffc857 100%);
    color: #050b1a;
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 200, 87, 0.6);
}

.btn-glow {
    animation: btnPulse 2s infinite ease-in-out;
}

@keyframes btnPulse {
    0%, 100% { box-shadow: 0 0 15px rgba(255, 200, 87, 0.4); }
    50% { box-shadow: 0 0 30px rgba(255, 200, 87, 0.8); }
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Touch Controls for Mobile */
.touch-controls {
    display: none;
    width: 100%;
    max-width: 600px;
    margin-top: 14px;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px;
}

.dpad {
    position: relative;
    width: 140px;
    height: 140px;
}

.dpad-btn {
    position: absolute;
    width: 44px;
    height: 44px;
    background: rgba(30, 58, 138, 0.7);
    border: 1.5px solid var(--panel-border);
    color: var(--primary-gold);
    font-size: 1.1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.dpad-btn:active {
    background: var(--primary-gold);
    color: #050b1a;
    transform: scale(0.92);
}

.dpad-up { top: 0; left: 48px; }
.dpad-down { bottom: 0; left: 48px; }
.dpad-left { top: 48px; left: 0; }
.dpad-right { top: 48px; right: 0; }

.vortex-touch-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: radial-gradient(circle, #ffc857 0%, #1d4ed8 70%, #0f172a 100%);
    border: 2px solid var(--primary-gold);
    color: #ffffff;
    box-shadow: 0 6px 20px rgba(255, 200, 87, 0.5);
    touch-action: manipulation;
    transition: transform 0.15s ease;
}

.vortex-touch-btn:active {
    transform: scale(0.92);
}

.vortex-touch-btn .btn-icon {
    font-size: 1.8rem;
    line-height: 1;
}

.vortex-touch-btn .btn-text {
    font-size: 0.75rem;
    font-weight: 800;
    margin-top: 4px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(4, 8, 20, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    width: 100%;
    max-width: 520px;
    background: rgba(15, 25, 50, 0.95);
    border: 1.5px solid var(--panel-border);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-header h3 {
    font-family: var(--font-heading);
    color: var(--primary-gold);
    font-size: 1.25rem;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.6rem;
    cursor: pointer;
}

.modal-close-btn:hover { color: #fff; }

.help-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 0.88rem;
    line-height: 1.5;
    color: #cbd5e1;
}

.footer {
    width: 100%;
    text-align: center;
    padding: 16px 0;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 10px;
}

/* Responsive Media Queries */
@media (max-width: 768px) {
    .touch-controls {
        display: flex;
    }

    .app-container {
        padding: 8px 12px;
    }

    .header {
        padding: 10px 14px;
        margin-bottom: 8px;
    }

    .main-title {
        font-size: 1.2rem;
    }

    .subtitle {
        display: none;
    }

    .dashboard {
        gap: 6px;
    }

    .stat-card {
        padding: 6px 8px;
    }

    .stat-value {
        font-size: 1.1rem;
    }
}