:root {
    --bg-dark: #070D18;
    --bg-card: rgba(15, 27, 46, 0.85);
    --border-glass: rgba(0, 240, 255, 0.25);
    --border-glass-glow: rgba(0, 240, 255, 0.6);
    --aurora-cyan: #00F0FF;
    --aurora-emerald: #00FFB3;
    --aurora-violet: #C084FC;
    --aurora-pink: #F472B6;
    --rune-gold: #FBBF24;
    --rune-flame: #FF5555;
    --rune-ice: #38BDF8;
    --text-light: #F0F6FC;
    --text-muted: #94A3B8;
    --font-heading: 'Orbitron', 'Cinzel', 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-touch-callout: none;
}

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

/* Background Shader & Particles */
.aurora-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 20%, #0F2537 0%, #070D18 80%);
    z-index: -2;
}

.aurora-bg::before {
    content: '';
    position: absolute;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(0, 255, 179, 0.12) 0%, rgba(192, 132, 252, 0.08) 40%, transparent 70%);
    filter: blur(60px);
    animation: auroraWave 12s ease-in-out infinite alternate;
}

@keyframes auroraWave {
    0% { transform: translateY(0) scale(1); opacity: 0.7; }
    50% { transform: translateY(30px) scale(1.1); opacity: 0.9; }
    100% { transform: translateY(-20px) scale(1.05); opacity: 0.6; }
}

.snow-dust-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* App Container Layout */
.app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 10px 16px;
}

/* Header Navigation */
.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    margin-bottom: 10px;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--aurora-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 6px 12px;
    border-radius: 8px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.2);
    transition: all 0.2s ease;
}

.back-link:hover {
    background: rgba(0, 240, 255, 0.2);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

.game-title-group {
    text-align: center;
}

.game-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    letter-spacing: 2px;
    color: var(--text-light);
}

.nordic-text {
    color: var(--aurora-cyan);
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
}

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

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

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-light);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--aurora-cyan);
    color: var(--aurora-cyan);
}

/* Dashboard Panel */
.dashboard-panel {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    width: 100%;
    margin-bottom: 10px;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 8px 12px;
    backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-light);
}

.nordic-num {
    color: var(--aurora-emerald);
    text-shadow: 0 0 8px rgba(0, 255, 179, 0.4);
}

.rune-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(0, 240, 255, 0.12);
    border: 1px solid var(--aurora-cyan);
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--aurora-cyan);
}

.energy-box {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stat-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.stat-subval {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--rune-gold);
}

.energy-bar-track {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.energy-bar-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--aurora-cyan), var(--aurora-violet), var(--rune-gold));
    box-shadow: 0 0 10px var(--aurora-cyan);
    transition: width 0.3s ease;
}

.energy-ready .energy-bar-fill {
    animation: pulseGlow 1s infinite alternate;
}

@keyframes pulseGlow {
    0% { filter: brightness(1); }
    100% { filter: brightness(1.6); box-shadow: 0 0 16px var(--rune-gold); }
}

/* Main Game Canvas Wrapper */
.canvas-wrapper {
    position: relative;
    flex: 1;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    border-radius: 16px;
    background: rgba(7, 13, 24, 0.8);
    border: 1.5px solid var(--border-glass);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6), inset 0 0 20px rgba(0, 240, 255, 0.05);
    overflow: hidden;
}

#game-canvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
    border-radius: 12px;
}

/* Status Banner Overlay */
.status-banner {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%) translateY(-50px);
    background: linear-gradient(90deg, rgba(0, 240, 255, 0.9), rgba(192, 132, 252, 0.9));
    color: #070D18;
    padding: 6px 18px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    box-shadow: 0 4px 16px rgba(0, 240, 255, 0.5);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
    z-index: 10;
}

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

/* Overlays (Start, Pause, Game Over) */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(7, 13, 24, 0.88);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 20;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.overlay-card {
    background: var(--bg-card);
    border: 1.5px solid var(--border-glass-glow);
    border-radius: 20px;
    padding: 24px;
    max-width: 480px;
    width: 90%;
    text-align: center;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.7), 0 0 30px rgba(0, 240, 255, 0.2);
}

.aurora-rune-logo {
    width: 60px;
    height: 60px;
    margin: 0 auto 12px;
    background: radial-gradient(circle, rgba(0,240,255,0.2) 0%, transparent 70%);
    border: 2px solid var(--aurora-cyan);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--aurora-cyan);
}

.rune-symbol {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--aurora-cyan);
}

.overlay-card h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    letter-spacing: 1.5px;
    margin-bottom: 4px;
}

.danger-title {
    color: var(--rune-flame);
    text-shadow: 0 0 12px rgba(255, 85, 85, 0.5);
}

.subtitle-text {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 18px;
}

/* Guide Grid */
.guide-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    text-align: left;
    margin-bottom: 20px;
}

.guide-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 10px;
    border-radius: 10px;
}

.guide-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.guide-item strong {
    font-size: 0.8rem;
    display: block;
    color: var(--aurora-cyan);
}

.guide-item p {
    font-size: 0.7rem;
    color: var(--text-muted);
    line-height: 1.2;
    margin-top: 2px;
}

/* Glow Button */
.glow-btn {
    background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-emerald));
    color: #070D18;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 1px;
    border: none;
    border-radius: 12px;
    padding: 12px 28px;
    cursor: pointer;
    transition: all 0.25 ease;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
    width: 100%;
}

.glow-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 179, 0.7);
}

.outline-btn {
    background: transparent;
    border: 1px solid var(--border-glass);
    color: var(--text-light);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 12px;
    padding: 10px 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.outline-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--aurora-cyan);
}

.overlay-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* End Stats */
.end-stats {
    display: flex;
    justify-content: space-around;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 20px;
}

.end-stat-item {
    display: flex;
    flex-direction: column;
}

.end-stat-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.end-stat-item .value {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--aurora-cyan);
    font-weight: 700;
}

/* Mobile Touch Controls */
.mobile-controls-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-top: 10px;
    padding: 4px 10px;
}

.dpad-container {
    display: flex;
    flex-direction: column;
    align-items: center;

}

.dpad-row {
    display: flex;
    gap: 4px;
}

.dpad-btn {
    width: 44px;
    height: 44px;
    background: rgba(15, 27, 46, 0.85);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    color: var(--aurora-cyan);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    touch-action: manipulation;
    transition: background 0.1s ease;
}

.dpad-btn:active {
    background: var(--aurora-cyan);
    color: #070D18;
}

.dpad-center {
    width: 44px;
    height: 44px;
}

.skill-btn-wrapper {
    display: flex;
    align-items: center;
}

.skill-btn {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(15, 27, 46, 0.9) 0%, rgba(7, 13, 24, 0.95) 100%);
    border: 2px solid var(--border-glass);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.skill-btn .skill-icon {
    font-size: 1.6rem;
}

.skill-btn span {
    font-size: 0.7rem;
    font-weight: 700;
    margin-top: 2px;
}

.skill-btn small {
    font-size: 0.55rem;
    color: var(--text-muted);
}

.skill-btn:not(:disabled) {
    border-color: var(--rune-gold);
    box-shadow: 0 0 20px var(--rune-gold);
    animation: skillPulse 1.2s infinite alternate;
}

.skill-btn:not(:disabled):active {
    transform: scale(0.92);
}

@keyframes skillPulse {
    0% { transform: scale(1); box-shadow: 0 0 10px var(--rune-gold); }
    100% { transform: scale(1.06); box-shadow: 0 0 25px var(--rune-gold), 0 0 40px var(--aurora-cyan); }
}

/* Responsive Styles */
@media (max-width: 640px) {
    .app-container {
        padding: 6px;
    }

    .game-title {
        font-size: 1rem;
    }

    .dashboard-panel {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }

    .dpad-btn {
        width: 40px;
        height: 40px;
    }

    .dpad-center {
        width: 40px;
        height: 40px;
    }

    .skill-btn {
        width: 75px;
        height: 75px;
    }
}