* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Orbitron', sans-serif;
}

body, html {
    width: 100%;
    height: 100%;
    background-color: #0d0d12;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    border-radius: 10px;
    z-index: 1;
}

#ui-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#scoreboard {
    width: 100%;
    max-width: 1000px;
    display: flex;
    justify-content: space-between;
    padding: 20px 40px;
}

.player-score {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 30px;
    border-radius: 12px;
    text-align: center;
    color: white;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.player-score.p1 {
    border-bottom: 4px solid #ff3366;
    box-shadow: 0 10px 30px rgba(255, 51, 102, 0.2);
}

.player-score.p2 {
    border-bottom: 4px solid #33ccff;
    box-shadow: 0 10px 30px rgba(51, 204, 255, 0.2);
}

.player-score.p3 {
    border-bottom: 4px solid #00ff66;
    box-shadow: 0 10px 30px rgba(0, 255, 102, 0.2);
}

.player-score.p4 {
    border-bottom: 4px solid #ffcc00;
    box-shadow: 0 10px 30px rgba(255, 204, 0, 0.2);
}

.player-score .name {
    display: block;
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 5px;
}

.player-score .laps {
    display: block;
    font-size: 24px;
    font-weight: 900;
}

#start-screen, #game-over-screen, #qualify-results-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(15, 15, 25, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 50px;
    border-radius: 24px;
    text-align: center;
    color: white;
    pointer-events: auto;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    transition: opacity 0.3s ease;
}

#start-screen h1 {
    font-size: 48px;
    margin-bottom: 10px;
    background: linear-gradient(90deg, #ff3366, #33ccff, #00ff66, #ffcc00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#start-screen p {
    font-size: 18px;
    opacity: 0.8;
    margin-bottom: 30px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
}

.control-box {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 12px;
    min-width: 150px;
}

.control-box h3 {
    margin-bottom: 10px;
    font-size: 20px;
}

.control-box p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 0 !important;
}

.add-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.6);
    font-size: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    width: 60px;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    box-shadow: none;
}

.add-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.track-select {
    text-align: center;
}

.track-btns {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.track-btn {
    background: rgba(255, 255, 255, 0.07);
    border: 2px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.7);
    font-family: 'Orbitron', sans-serif;
    font-size: 12px;
    font-weight: 700;
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: none;
}

.track-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--tc, #fff);
    color: white;
    box-shadow: 0 0 12px var(--tc, #fff);
    transform: translateY(-2px);
}

.track-btn.selected {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--tc, #fff);
    color: white;
    box-shadow: 0 0 16px var(--tc, #fff);
}

button {
    background: linear-gradient(45deg, #ff3366, #ff6699);
    border: none;
    padding: 15px 40px;
    font-size: 18px;
    font-weight: 700;
    color: white;
    border-radius: 30px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(255, 51, 102, 0.3);
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 51, 102, 0.5);
}

.hidden {
    opacity: 0;
    pointer-events: none !important;
}