/* style.css - Abyssal Glow: Deep Sea Echolocation Snake */

:root {
    --bg-dark: #02040c;
    --bg-card: rgba(6, 11, 28, 0.65);
    --bg-inner: rgba(2, 4, 12, 0.85);
    
    --cyan: #00f2fe;
    --cyan-glow: rgba(0, 242, 254, 0.4);
    --cyan-dark: #008fa0;
    
    --magenta: #f857a6;
    --magenta-glow: rgba(248, 87, 166, 0.4);
    
    --gold: #ffd700;
    --gold-glow: rgba(255, 215, 0, 0.4);
    
    --green: #39ff14;
    --green-glow: rgba(57, 255, 20, 0.4);
    
    --red: #ff073a;
    --red-glow: rgba(255, 7, 58, 0.4);
    
    --text-primary: #e6ebf8;
    --text-muted: #8ba2c1;
    
    --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
    --font-mono: 'Orbitron', monospace;
    --font-sans: 'Inter', system-ui, sans-serif;
    
    --border-glow: 1px solid rgba(0, 242, 254, 0.25);
    --border-muted: 1px solid rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Background Atmosphere */
.abyss-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    background: radial-gradient(circle at 50% 50%, #0a1333 0%, #020512 80%);
    pointer-events: none;
}

.bubbles-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.15;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255,255,255,0.4) 1px, transparent 1px),
        radial-gradient(circle at 80% 40%, rgba(255,255,255,0.4) 2px, transparent 2px),
        radial-gradient(circle at 40% 70%, rgba(255,255,255,0.4) 1.5px, transparent 1.5px),
        radial-gradient(circle at 70% 90%, rgba(255,255,255,0.4) 2.5px, transparent 2px);
    background-size: 300px 300px;
    animation: floatingBubbles 20s linear infinite;
}

@keyframes floatingBubbles {
    0% { background-position: 0 0; }
    100% { background-position: 0 -300px; }
}

/* Vignette / Depth pressure overlay */
.vignette-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 2;
    background: radial-gradient(circle, transparent 20%, rgba(0, 1, 6, 0.9) 100%);
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.game-wrapper {
    width: 100%;
    max-width: 1200px;
    z-index: 3;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Header */
.game-header {
    display: grid;
    grid-template-columns: 180px 1fr 180px;
    align-items: center;
    background: var(--bg-card);
    border: var(--border-muted);
    border-radius: 12px;
    padding: 12px 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
}

.back-link {
    display: flex;
    align-items: center;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.1);
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(255,255,255,0.03);
    transition: all 0.2s ease;
}

.btn-back:hover {
    color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 12px var(--cyan-glow);
    background: rgba(0, 242, 254, 0.05);
}

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

.abyss-title {
    font-family: var(--font-heading);
    font-size: 30px;
    font-weight: 900;
    letter-spacing: 3px;
    background: linear-gradient(135deg, #ffffff 30%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0, 242, 254, 0.25);
}

.sub-title {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
    display: block;
    margin-top: 2px;
}

.abyss-badge {
    justify-self: end;
    font-family: var(--font-mono);
    border: 1px solid var(--cyan);
    color: var(--cyan);
    padding: 6px 12px;
    font-size: 13px;
    letter-spacing: 1px;
    border-radius: 6px;
    background: rgba(0, 242, 254, 0.08);
    box-shadow: inset 0 0 8px var(--cyan-glow);
}

/* Main Layout Grid */
.game-layout {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 15px;
}

/* Glass Cards */
.glass-card {
    background: var(--bg-card);
    border: var(--border-muted);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; height: 1.5px;
    background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.4), transparent);
}

.card-title {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 10px;
    margin-bottom: 15px;
    letter-spacing: 1px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hotkey {
    font-size: 10px;
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Left Panel Items */
.sonar-display-container {
    display: flex;
    justify-content: center;
    margin: 10px 0 20px 0;
}

.sonar-radar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 2px solid var(--cyan-dark);
    position: relative;
    overflow: hidden;
    background: rgba(0, 20, 40, 0.4);
    box-shadow: inset 0 0 20px rgba(0, 242, 254, 0.15);
}

.radar-line {
    position: absolute;
    width: 50%;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), transparent);
    top: 50%;
    left: 50%;
    transform-origin: left center;
    animation: radarSweep 3s linear infinite;
}

@keyframes radarSweep {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.sonar-wave-hud {
    position: absolute;
    top: 50%; left: 50%;
    width: 10px; height: 10px;
    border-radius: 50%;
    border: 2px solid var(--cyan);
    transform: translate(-50%, -50%);
    opacity: 0;
}

.sonar-wave-hud.pinging {
    animation: sonarPingHUD 1s ease-out;
}

@keyframes sonarPingHUD {
    0% { width: 10px; height: 10px; opacity: 1; }
    100% { width: 120px; height: 120px; opacity: 0; border-width: 0.5px; }
}

.sonar-readiness-hud {
    position: absolute;
    width: 100%;
    text-align: center;
    bottom: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--cyan);
    text-shadow: 0 0 5px var(--cyan);
}

.sonar-readiness-hud.cooldown {
    color: var(--text-muted);
    text-shadow: none;
}

.sonar-meter {
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.sonar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--cyan-dark), var(--cyan));
    box-shadow: 0 0 10px var(--cyan-glow);
    transition: width 0.1s linear;
}

/* Score Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 18px;
}

.stat-box {
    background: var(--bg-inner);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
}

.stat-title {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: 800;
}

.neon-cyan {
    color: var(--cyan);
    text-shadow: 0 0 8px var(--cyan-glow);
}

.neon-magenta {
    color: var(--magenta);
    text-shadow: 0 0 8px var(--magenta-glow);
}

.stat-row {
    background: var(--bg-inner);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.neon-bg-cyan {
    background: linear-gradient(90deg, var(--cyan-dark), var(--cyan));
    box-shadow: 0 0 10px var(--cyan-glow);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    color: var(--cyan);
}

/* System Controls */
.control-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.control-row:last-child {
    margin-bottom: 0;
}

.control-row label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.custom-select {
    background: var(--bg-inner);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 8px;
    font-size: 13px;
    outline: none;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: border-color 0.2s;
}

.custom-select:focus {
    border-color: var(--cyan);
}

.custom-select option {
    background: var(--bg-dark);
    color: var(--text-primary);
}

/* Custom Audio Toggle Switch */
.toggle-container {
    position: relative;
    width: 60px;
    height: 30px;
}

.toggle-container input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: .3s;
    border-radius: 30px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-muted);
    transition: .3s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: rgba(0, 242, 254, 0.15);
    border-color: var(--cyan);
    box-shadow: 0 0 10px var(--cyan-glow);
}

input:checked + .toggle-slider:before {
    transform: translateX(30px);
    background-color: var(--cyan);
    box-shadow: 0 0 8px var(--cyan);
}

/* Center Panel Layout */
.panel-center {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.canvas-container {
    background: #000105;
    border: 2px solid var(--cyan-dark);
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.9), 0 0 20px rgba(0, 242, 254, 0.1);
    position: relative;
    overflow: hidden;
    width: 600px;
    height: 600px;
}

/* Prevent double-tap zoom and touch scrolling inside canvas on mobile */
#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* Overlays */
.screen-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(1, 4, 15, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 10;
    padding: 30px;
    backdrop-filter: blur(8px);
    transition: opacity 0.3s ease;
}

.screen-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    max-width: 440px;
}

.abyss-logo, .death-icon, .pause-icon {
    font-size: 60px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px var(--cyan-glow));
}

.death-icon {
    filter: drop-shadow(0 0 15px var(--red-glow));
}

.overlay-title {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.neon-text-red {
    color: var(--red);
    text-shadow: 0 0 10px var(--red-glow);
}

.overlay-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 30px;
}

.overlay-desc strong {
    color: #ffffff;
}

.score-summary {
    background: var(--bg-inner);
    border: var(--border-muted);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 25px;
    font-family: var(--font-heading);
}

.score-summary p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.score-summary p:last-child {
    margin-bottom: 0;
}

.score-summary span {
    font-family: var(--font-mono);
    font-weight: 800;
    font-size: 18px;
}

.btn-action {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    color: var(--bg-dark);
    background: linear-gradient(135deg, #ffffff, var(--cyan));
    border: none;
    padding: 14px 40px;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4), 0 0 15px rgba(0, 242, 254, 0.25);
    transition: all 0.2s ease;
}

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 25px rgba(0, 242, 254, 0.5);
}

.btn-action:active {
    transform: translateY(1px);
}

/* Mobile Controls Styling */
.mobile-controls {
    display: none; /* Shown on screens under 1200px */
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.touch-control-hint {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

.sonar-btn {
    width: 100%;
    max-width: 250px;
    height: 54px;
    border-radius: 27px;
    border: 2px solid var(--cyan);
    background: rgba(0, 242, 254, 0.08);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
}

.sonar-btn-inner {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 2;
    color: #ffffff;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 1px;
}

.sonar-icon {
    font-size: 18px;
}

.sonar-btn-cooldown {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.15);
    z-index: 1;
    transform-origin: bottom center;
    transform: scaleY(0);
    transition: transform 0.1s linear;
}

.sonar-btn:active:not([disabled]) {
    transform: scale(0.97);
    background: rgba(0, 242, 254, 0.2);
}

/* Right Panel: Codex */
.codex-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 480px;
    overflow-y: auto;
    padding-right: 4px;
}

.codex-list::-webkit-scrollbar {
    width: 4px;
}
.codex-list::-webkit-scrollbar-track {
    background: transparent;
}
.codex-list::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}
.codex-list::-webkit-scrollbar-thumb:hover {
    background: var(--cyan-dark);
}

.codex-item {
    background: var(--bg-inner);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 12px;
    transition: border-color 0.2s ease;
}

.codex-item:hover {
    border-color: rgba(0, 242, 254, 0.15);
}

.codex-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.codex-icon {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 6px currentColor;
}

.color-plankton { color: var(--green); background-color: var(--green); }
.color-jellyfish { color: var(--magenta); background-color: var(--magenta); }
.color-pearl { color: var(--gold); background-color: var(--gold); }
.color-rock { color: #53647c; background-color: #53647c; border-radius: 3px; }
.color-angler { color: var(--red); background-color: var(--red); }

.codex-name {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
}

.codex-desc {
    font-size: 11px;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Responsiveness */
@media (max-width: 1200px) {
    body {
        padding: 10px;
    }
    .game-layout {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
        width: 100%;
        gap: 12px;
    }
    .panel-left {
        order: 2;
    }
    .panel-center {
        order: 1;
    }
    .panel-right {
        order: 3;
    }
    .game-header {
        grid-template-columns: auto 1fr;
        padding: 10px 16px;
    }
    .abyss-badge {
        display: none;
    }
    .mobile-controls {
        display: flex;
    }
    .sonar-card {
        display: none; /* Covered by mobile button and head indicators */
    }
}

@media (max-width: 640px) {
    .canvas-container {
        width: 100%;
        height: auto;
        aspect-ratio: 1;
    }
    .overlay-title {
        font-size: 24px;
    }
    .overlay-desc {
        font-size: 11px;
        margin-bottom: 20px;
    }
    .abyss-title {
        font-size: 22px;
    }
}

/* Mobile Overlays Height Optimization to prevent clipping */
@media (max-width: 640px) {
    .screen-overlay {
        padding: 15px;
        overflow-y: auto;
        justify-content: flex-start; /* safe scroll from top if content overflows */
    }
    
    .overlay-content {
        margin: auto 0; /* Centered unless overflowing */
    }

    .abyss-logo, .death-icon, .pause-icon {
        font-size: 44px;
        margin-bottom: 10px;
    }

    .overlay-title {
        font-size: 20px;
        margin-bottom: 8px;
        letter-spacing: 1px;
    }

    .overlay-desc {
        font-size: 11px;
        margin-bottom: 12px;
        line-height: 1.4;
    }

    .score-summary {
        padding: 10px;
        margin-bottom: 15px;
    }

    .score-summary p {
        font-size: 12px;
        margin-bottom: 4px;
    }

    .score-summary span {
        font-size: 15px;
    }

    .btn-action {
        padding: 10px 30px;
        font-size: 14px;
    }
}