:root {
    --bg-color: #050505;
    --primary-neon: #00f3ff;
    /* Cyan */
    --secondary-neon: #ff00ff;
    /* Magenta */
    --accent-neon: #00ff66;
    /* Lime Green */
    --text-color: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    /* Prevent text selection during play */
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    height: 100vh;
    height: 100dvh;
    /* Mobile viewport fix */
    overflow: hidden;
    /* Prevent scrolling */
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-container {
    width: 100%;
    height: 100%;
    max-width: 600px;
    /* Mobile-first constraint for desktop */
    display: flex;
    flex-direction: column;
    position: relative;
    background: radial-gradient(circle at center, #111, #000);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
}

/* --- Header --- */
header {
    padding: 1rem;
    text-align: center;
    position: relative;
    z-index: 10;
}

h1 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--primary-neon);
    margin-bottom: 0.5rem;
}

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

.score-display {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent-neon);
}

/* --- Game Area --- */
#game-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

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

/* --- Overlays --- */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 20;
}

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

.overlay-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    width: 80%;
    max-width: 400px;
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.1);
}

.overlay-content h2 {
    font-family: var(--font-display);
    color: var(--primary-neon);
    margin-bottom: 1rem;
    text-shadow: 0 0 5px var(--primary-neon);
}

.overlay-content p {
    margin-bottom: 1.5rem;
    line-height: 1.5;
    color: #ccc;
}

/* --- Buttons --- */
button {
    cursor: pointer;
    font-family: var(--font-display);
    border: none;
    outline: none;
    transition: all 0.2s ease;
    text-transform: uppercase;
    font-weight: 700;
}

.neon-btn {
    background: transparent;
    color: var(--primary-neon);
    border: 2px solid var(--primary-neon);
    padding: 12px 24px;
    font-size: 1.1rem;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
    margin: 0.5rem;
    width: 100%;
}

.neon-btn:hover {
    background: var(--primary-neon);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.6);
}

.secondary-btn {
    background: transparent;
    color: #888;
    padding: 10px 20px;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.secondary-btn:hover {
    color: #fff;
}

/* --- Inputs --- */
input[type="text"] {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--primary-neon);
    color: #fff;
    padding: 10px;
    font-family: var(--font-display);
    font-size: 1.1rem;
    text-align: center;
    width: 100%;
    margin-bottom: 1rem;
    border-radius: 5px;
}

input[type="text"]:focus {
    outline: none;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

/* --- High Scores List --- */
#highScoreList {
    list-style: none;
    text-align: left;
    margin-bottom: 1.5rem;
    max-height: 200px;
    overflow-y: auto;
}

#highScoreList li {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-family: var(--font-display);
    font-size: 0.9rem;
}

#highScoreList li:nth-child(1) {
    color: #ffd700;
    text-shadow: 0 0 5px #ffd700;
}

/* Gold */
#highScoreList li:nth-child(2) {
    color: #c0c0c0;
}

/* Silver */
#highScoreList li:nth-child(3) {
    color: #cd7f32;
}

/* Bronze */

/* --- Ads --- */
.ad-banner {
    background: #1a1a1a;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px dashed #333;
    color: #444;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.top-banner {
    height: 60px;
    width: 100%;
}

.bottom-banner {
    height: 60px;
    width: 100%;
}

/* --- Utilities --- */
.hidden {
    display: none !important;
}

/* --- Animations --- */
@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.new-record-text {
    color: var(--secondary-neon);
    font-weight: bold;
    animation: pulse 1s infinite;
    margin-bottom: 1rem;
}

/* --- Responsive Adjustments --- */
@media (max-height: 500px) {
    .top-banner {
        height: 40px;
        min-height: 40px;
    }

    header {
        padding: 0.2rem;
    }

    h1 {
        font-size: 1.5rem;
        margin-bottom: 0;
    }

    .score-display {
        font-size: 1rem;
    }
}