/* CSS for Steampunk Clockwork Automaton Snake (2026-08-12) */
:root {
    --bg-dark: #120e0b;
    --bg-panel: rgba(30, 23, 17, 0.85);
    --gold-primary: #d4af37;
    --gold-light: #fff0aa;
    --copper-primary: #c87533;
    --amber-steam: #ff8c00;
    --ruby-red: #e63946;
    --cyan-spark: #00e5ff;
    --rust-gray: #4a3e3d;
    --border-brass: #8a6d27;
    --text-light: #f5eedc;
    --text-muted: #a69888;
    --font-heading: 'Cinzel', 'Noto Sans SC', serif;
    --font-ui: 'Orbitron', 'Outfit', sans-serif;
    --font-body: 'Outfit', 'Noto Sans SC', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Background & Ambient Visuals */
.steampunk-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 40%, #2b1f14 0%, #120e0b 80%);
    z-index: -3;
}

.steampunk-grid-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(rgba(212, 175, 55, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(212, 175, 55, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -2;
    pointer-events: none;
}

.steam-pipes-overlay {
    position: fixed;
    top: -50px;
    left: -50px;
    right: -50px;
    bottom: -50px;
    background: radial-gradient(ellipse at center, transparent 40%, rgba(10, 8, 6, 0.7) 100%);
    z-index: -1;
    pointer-events: none;
}

.ambient-fog {
    position: fixed;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(circle at 30% 70%, rgba(255, 140, 0, 0.06), transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(212, 175, 55, 0.06), transparent 50%);
    animation: fogDrift 25s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: -1;
}

@keyframes fogDrift {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-4%, 4%) scale(1.1); }
}

/* Container & Header */
.app-container {
    width: 100%;
    max-width: 900px;
    min-height: 100vh;
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-panel);
    border: 2px solid var(--border-brass);
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), inset 0 0 15px rgba(212, 175, 55, 0.15);
    backdrop-filter: blur(12px);
    margin-bottom: 16px;
}

.back-home-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--gold-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 8px 12px;
    border-radius: 8px;
    background: rgba(212, 175, 55, 0.1);
    border: 1px solid var(--border-brass);
    transition: all 0.25s ease;
}

.back-home-btn:hover {
    background: rgba(212, 175, 55, 0.25);
    box-shadow: 0 0 12px rgba(212, 175, 55, 0.4);
    transform: translateY(-2px);
}

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

.main-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    letter-spacing: 2px;
    color: var(--gold-light);
    text-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
    margin-bottom: 2px;
}

.sub-highlight {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    color: var(--copper-primary);
    background: linear-gradient(135deg, var(--gold-primary), var(--amber-steam));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(45, 34, 25, 0.8);
    border: 1px solid var(--border-brass);
    color: var(--gold-light);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: rgba(212, 175, 55, 0.2);
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.4);
    transform: scale(1.05);
}

/* Dashboard */
.dashboard {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-brass);
    border-radius: 12px;
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.4);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.stat-value {
    font-family: var(--font-ui);
    font-size: 1.3rem;
    font-weight: 800;
}

.card-gold .stat-value { color: var(--gold-primary); text-shadow: 0 0 8px rgba(212, 175, 55, 0.5); }
.card-copper .stat-value { color: var(--copper-primary); text-shadow: 0 0 8px rgba(200, 117, 51, 0.5); }
.card-ruby .stat-value { color: var(--ruby-red); text-shadow: 0 0 8px rgba(230, 57, 70, 0.5); }

.energy-card {
    grid-column: span 1;
}

.energy-bar-track {
    width: 100%;
    height: 12px;
    background: rgba(20, 15, 10, 0.9);
    border-radius: 6px;
    border: 1px solid var(--border-brass);
    overflow: hidden;
    position: relative;
}

.energy-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gold-primary), var(--amber-steam), var(--cyan-spark));
    box-shadow: 0 0 12px var(--amber-steam);
    transition: width 0.2s ease-out;
}

/* Game Viewport Container */
.game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    aspect-ratio: 1 / 1;
    border: 4px solid var(--border-brass);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.8), 0 0 25px rgba(212, 175, 55, 0.2);
    background: #0f0b08;
}

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

/* Overlays */
.steam-overlay {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 5;
}

.steam-overlay.active {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.steam-badge {
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.95), rgba(212, 175, 55, 0.95));
    color: #120e0b;
    font-weight: 800;
    font-size: 0.85rem;
    padding: 8px 18px;
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(255, 140, 0, 0.8);
    letter-spacing: 1px;
}

.overlay-screen {
    position: absolute;
    inset: 0;
    background: rgba(15, 11, 8, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 10;
}

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

.glass-panel {
    background: var(--bg-panel);
    border: 2px solid var(--border-brass);
    border-radius: 20px;
    padding: 28px;
    width: 88%;
    max-width: 440px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7), inset 0 0 20px rgba(212, 175, 55, 0.15);
}

.steampunk-icon-wrapper {
    margin-bottom: 12px;
}

.steampunk-svg {
    animation: rotateGear 16s linear infinite;
}

@keyframes rotateGear {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.overlay-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--gold-light);
    margin-bottom: 4px;
}

.overlay-subtitle {
    font-size: 0.85rem;
    color: var(--copper-primary);
    margin-bottom: 20px;
}

.rules-summary {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
    margin-bottom: 24px;
    background: rgba(15, 11, 8, 0.6);
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(212, 175, 55, 0.2);
}

.rule-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--text-light);
}

.rule-icon {
    font-size: 1.3rem;
}

.btn {
    padding: 12px 24px;
    font-family: var(--font-ui);
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: 10px;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold-primary), var(--copper-primary));
    color: #120e0b;
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--gold-light), var(--amber-steam));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 140, 0, 0.6);
}

.btn-secondary {
    background: rgba(45, 34, 25, 0.8);
    color: var(--gold-light);
    border: 1px solid var(--border-brass);
}

.btn-secondary:hover {
    background: rgba(212, 175, 55, 0.2);
}

.btn-glow {
    animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 10px rgba(212, 175, 55, 0.4); }
    100% { box-shadow: 0 0 25px rgba(255, 140, 0, 0.8); }
}

.text-danger {
    color: var(--ruby-red);
}

.gameover-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.go-stat {
    background: rgba(15, 11, 8, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.2);
    border-radius: 10px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.go-stat strong {
    font-family: var(--font-ui);
    font-size: 1.2rem;
    color: var(--gold-light);
    margin-top: 4px;
}

.go-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* Touch Controls */
.touch-controls {
    display: none;
    width: 100%;
    max-width: 600px;
    margin-top: 16px;
    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: var(--bg-panel);
    border: 1px solid var(--border-brass);
    color: var(--gold-primary);
    border-radius: 10px;
    font-size: 1.1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    touch-action: manipulation;
}

.dpad-btn:active {
    background: var(--gold-primary);
    color: #120e0b;
    transform: scale(0.95);
}

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

.steam-touch-btn {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--amber-steam), #993d00);
    border: 3px solid var(--gold-primary);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 20px rgba(255, 140, 0, 0.5);
    cursor: pointer;
    touch-action: manipulation;
    transition: all 0.2s ease;
}

.steam-touch-btn:active {
    transform: scale(0.95);
    box-shadow: 0 0 30px rgba(255, 140, 0, 0.8);
}

.steam-touch-btn .btn-icon {
    font-size: 2rem;
}

.steam-touch-btn .btn-text {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 800;
    margin-top: 4px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 8, 6, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

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

.modal-card {
    max-width: 500px;
    width: 90%;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(212, 175, 55, 0.3);
    padding-bottom: 10px;
}

.modal-header h3 {
    font-family: var(--font-heading);
    color: var(--gold-light);
}

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

.help-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
    font-size: 0.85rem;
    line-height: 1.5;
}

.footer {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 20px;
}

/* Responsive Media Queries */
@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .energy-card {
        grid-column: span 2;
    }
    
    .touch-controls {
        display: flex;
    }
    
    .main-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 8px 12px;
    }
    
    .back-home-btn span {
        display: none;
    }
    
    .stat-value {
        font-size: 1.1rem;
    }
}