/* Silicon Microchip & Logic Overclock Snake - Theme CSS */
:root {
    --bg-dark: #070d14;
    --pcb-grid: #0d1b2a;
    --pcb-trace: #1b2f48;
    --copper-glow: #e5a93c;
    --neon-cyan: #00f3ff;
    --neon-green: #39ff14;
    --neon-gold: #ffbd2e;
    --neon-pink: #ff2a6d;
    --neon-purple: #9d4edd;
    --text-main: #e2e8f0;
    --text-muted: #64748b;
    --glass-bg: rgba(13, 27, 42, 0.75);
    --glass-border: rgba(0, 243, 255, 0.25);
    --font-heading: 'Orbitron', 'Outfit', sans-serif;
    --font-code: 'Fira Code', monospace;
    --font-body: 'Noto Sans SC', 'Outfit', sans-serif;
}

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

html, body {
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow: hidden;
    position: fixed;
    touch-action: none;
}

/* Background PCB Lattice Effect */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(0, 243, 255, 0.05) 0%, transparent 70%),
        linear-gradient(90deg, rgba(27, 47, 72, 0.3) 1px, transparent 1px),
        linear-gradient(0deg, rgba(27, 47, 72, 0.3) 1px, transparent 1px);
    background-size: 100% 100%, 24px 24px, 24px 24px;
    z-index: 0;
    pointer-events: none;
}

/* Main Layout Container */
.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 14px;
    gap: 8px;
}

/* Top Navigation Header */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 8px 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), inset 0 0 15px rgba(0, 243, 255, 0.05);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--neon-cyan);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 12px;
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid rgba(0, 243, 255, 0.3);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.back-link:hover {
    background: rgba(0, 243, 255, 0.25);
    box-shadow: 0 0 12px rgba(0, 243, 255, 0.4);
    transform: translateY(-1px);
}

.back-link .icon {
    width: 16px;
    height: 16px;
}

.title-group {
    display: flex;
    flex-direction: column;
}

.game-tag {
    font-family: var(--font-code);
    font-size: 0.65rem;
    color: var(--neon-green);
    letter-spacing: 1px;
}

.game-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #ffffff 0%, var(--neon-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-main);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: rgba(0, 243, 255, 0.15);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    transform: translateY(-1px);
}

.icon-btn .icon {
    width: 20px;
    height: 20px;
}

.hidden {
    display: none !important;
}

/* Dashboard HUD Panel */
.hud-panel {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.hud-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.hud-label {
    font-family: var(--font-code);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 2px;
}

.hud-value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.neon-cyan { color: var(--neon-cyan); text-shadow: 0 0 8px rgba(0, 243, 255, 0.5); }
.neon-green { color: var(--neon-green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5); }
.neon-gold { color: var(--neon-gold); text-shadow: 0 0 8px rgba(255, 189, 46, 0.5); }
.neon-pink { color: var(--neon-pink); text-shadow: 0 0 8px rgba(255, 42, 109, 0.5); }

/* EMP Skill Gauge Bar */
.emp-gauge-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 6px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.emp-gauge-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    font-family: var(--font-code);
}

.emp-label { color: var(--text-main); font-weight: 600; }
.emp-status { color: var(--neon-gold); font-weight: 700; letter-spacing: 0.5px; }

.emp-progress-bar {
    position: relative;
    width: 100%;
    height: 10px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid rgba(0, 243, 255, 0.2);
}

.emp-fill {
    height: 100%;
    background: linear-gradient(90deg, #00f3ff 0%, #39ff14 50%, #ffbd2e 100%);
    box-shadow: 0 0 12px var(--neon-gold);
    transition: width 0.2s ease-out;
}

.emp-gauge-container.ready .emp-fill {
    animation: pulse-gold 1s infinite alternate;
}

@keyframes pulse-gold {
    0% { filter: brightness(1); box-shadow: 0 0 10px var(--neon-gold); }
    100% { filter: brightness(1.4); box-shadow: 0 0 20px #ffffff; }
}

/* Game Viewport & Canvas */
.game-viewport {
    position: relative;
    flex: 1;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(4, 10, 18, 0.85);
    border: 1.5px solid var(--glass-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), inset 0 0 40px rgba(0, 243, 255, 0.05);
}

#game-canvas {
    display: block;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Mobile Touch Skill Button */
.mobile-emp-btn {
    position: absolute;
    bottom: 16px;
    right: 16px;
    z-index: 10;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 189, 46, 0.3) 0%, rgba(13, 27, 42, 0.9) 100%);
    border: 2px solid var(--neon-gold);
    color: var(--neon-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(255, 189, 46, 0.4);
    cursor: pointer;
    touch-action: manipulation;
    opacity: 0.6;
    pointer-events: none;
    transition: all 0.2s ease;
}

.mobile-emp-btn.active {
    opacity: 1;
    pointer-events: auto;
    animation: btn-glow 1.2s infinite alternate;
}

.mobile-emp-btn .btn-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.emp-btn-icon { font-size: 1.4rem; }
.emp-btn-text { font-family: var(--font-heading); font-size: 0.6rem; font-weight: 700; margin-top: 2px; }

@keyframes btn-glow {
    0% { transform: scale(1); box-shadow: 0 0 15px var(--neon-gold); }
    100% { transform: scale(1.08); box-shadow: 0 0 30px #ffffff; }
}

/* Overlay Modal Screens */
.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(4, 10, 18, 0.88);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 50;
    animation: fadeIn 0.3s ease;
}

.modal-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 28px 24px;
    max-width: 480px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), inset 0 0 25px rgba(0, 243, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-icon-badge {
    font-family: var(--font-code);
    font-size: 0.7rem;
    color: var(--neon-pink);
    letter-spacing: 2px;
    background: rgba(255, 42, 109, 0.15);
    border: 1px solid rgba(255, 42, 109, 0.3);
    padding: 4px 12px;
    border-radius: 20px;
    align-self: center;
}

.modal-card h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: #ffffff;
}

.modal-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.score-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 8px 0;
}

.summary-box {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sum-label { font-size: 0.68rem; color: var(--text-muted); }
.sum-value { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; }

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.btn {
    padding: 10px 20px;
    border-radius: 10px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, #00a8ff 100%);
    color: #040a12;
    border: none;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 0 25px rgba(0, 243, 255, 0.7);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

/* Operational Help Guide Modal Styling */
.help-card {
    text-align: left;
    max-width: 540px;
}

.help-card h2 {
    text-align: center;
}

.guide-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.guide-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(0, 0, 0, 0.3);
    padding: 10px;
    border-radius: 10px;
    border: 1px solid rgba(0, 243, 255, 0.1);
}

.guide-icon {
    font-family: var(--font-code);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--neon-cyan);
    background: rgba(0, 243, 255, 0.15);
    padding: 6px 10px;
    border-radius: 6px;
    min-width: 50px;
    text-align: center;
}

.guide-text {
    font-size: 0.82rem;
    line-height: 1.4;
    color: var(--text-main);
}

.guide-text strong {
    color: var(--neon-green);
}

/* Mobile D-Pad Direction Controller Overlay */
.controls-overlay {
    display: none;
    justify-content: center;
    align-items: center;
    padding-bottom: 6px;
}

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

.dpad-btn {
    position: absolute;
    width: 44px;
    height: 44px;
    background: rgba(13, 27, 42, 0.85);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--neon-cyan);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    touch-action: manipulation;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
}

.dpad-btn:active {
    background: var(--neon-cyan);
    color: #040a12;
    box-shadow: 0 0 15px var(--neon-cyan);
}

.dpad-up { top: 0; left: 48px; }
.dpad-down { bottom: 0; left: 48px; }
.dpad-left { top: 48px; left: 0; }
.dpad-right { top: 48px; right: 0; }
.dpad-center { top: 48px; left: 48px; width: 44px; height: 44px; border-radius: 50%; opacity: 0.3; pointer-events: none; }

/* Responsive Adaptations for Mobile & Small Screen Devices */
@media (max-width: 768px) {
    .app-container {
        padding: 6px 8px;
        gap: 6px;
    }

    .top-bar {
        padding: 6px 10px;
    }

    .game-title {
        font-size: 0.92rem;
    }

    .game-tag {
        font-size: 0.58rem;
    }

    .hud-panel {
        grid-template-columns: repeat(4, 1fr);
        gap: 4px;
    }

    .hud-card {
        padding: 4px 6px;
    }

    .hud-label {
        font-size: 0.55rem;
    }

    .hud-value {
        font-size: 0.95rem;
    }

    .controls-overlay {
        display: flex;
    }

    .mobile-emp-btn {
        width: 60px;
        height: 60px;
        bottom: 12px;
        right: 12px;
    }

    .emp-btn-icon { font-size: 1.1rem; }
    .emp-btn-text { font-size: 0.5rem; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}