:root {
    /* --- VARSAYILAN (GECE MODU) --- */
    --bg-color: #1a1a1a;        /* Daha koyu gri arka plan */
    --table-color: #2b2b2b;     /* Saha zemini */
    --primary-yellow: #ffcc00;  /* Tok Sarı (Neon Rengi) */
    --accent-red: #ff4444;      /* Rakip Rengi */
    --text-color: #f8fafc;
    --border-color: #ffcc00;
    --shadow-color: rgba(255, 204, 0, 0.4);
}

/* --- GÜNDÜZ MODU --- */
body.light-mode {
    --bg-color: #e2e8f0;
    --table-color: #ffffff;
    --primary-yellow: #d97706; /* Gündüz için daha koyu bir sarı/turuncu (okunabilirlik için) */
    --accent-red: #dc2626;
    --text-color: #1e293b;
    --border-color: #94a3b8;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.top-bar {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 20;
}

.icon-btn {
    background: var(--table-color);
    border: 2px solid var(--primary-yellow);
    color: var(--primary-yellow);
    font-size: 24px;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: 0.3s;
}
.icon-btn:hover {
    transform: rotate(30deg);
    box-shadow: 0 0 10px var(--primary-yellow);
}

.ui-container {
    text-align: center;
    position: relative;
    width: 100%;
    max-width: 900px;
}

.game-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    margin-bottom: 10px;
    letter-spacing: 5px;
    color: var(--primary-yellow);
    text-shadow: 0 0 15px var(--shadow-color);
}

canvas {
    background-color: var(--table-color);
    border: 4px solid var(--border-color);
    border-radius: 15px;
    box-shadow: 0 0 30px var(--shadow-color);
    cursor: none; 
    max-width: 100%;
}

/* --- Menüler --- */
.menu-box {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--table-color);
    padding: 40px;
    border-radius: 20px;
    border: 2px solid var(--primary-yellow);
    box-shadow: 0 0 30px var(--shadow-color);
    z-index: 10;
    color: var(--text-color);
}

.hidden { display: none !important; }

.btn {
    display: block;
    width: 100%;
    margin: 15px 0;
    padding: 15px 30px;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    background: transparent;
    color: var(--primary-yellow);
    border: 2px solid var(--primary-yellow);
    border-radius: 50px;
    cursor: pointer;
    transition: 0.3s;
    font-weight: bold;
}

.btn:hover {
    background: var(--primary-yellow);
    color: var(--bg-color);
}

/* --- Skor Tablosu --- */
.scoreboard {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    margin-bottom: 15px;
    font-family: 'Orbitron', sans-serif;
}

.score-box {
    text-align: center;
    font-size: 2.5rem;
    font-weight: bold;
}
.score-box .label {
    display: block;
    font-size: 0.8rem;
    opacity: 0.7;
    margin-bottom: -5px;
}
.p1 { color: var(--primary-yellow); }
.p2 { color: var(--accent-red); }

.center-info {
    text-align: center;
}

.timer {
    font-size: 2rem;
    color: var(--text-color);
    font-weight: bold;
    background: var(--table-color);
    padding: 5px 20px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.speed-info {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-top: 5px;
    opacity: 0.8;
}