@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&display=swap');

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

body {
    font-family: 'Orbitron', monospace;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    color: #00ffff;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(0, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(138, 43, 226, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.title {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(45deg, #00ffff, #ff00ff, #ffff00, #00ffff);
    background-size: 300% 300%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease-in-out infinite;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

.subtitle {
    font-size: 1.2rem;
    color: #8a2be2;
    margin-top: 0.5rem;
    letter-spacing: 2px;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.game-interface {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    grid-template-rows: auto auto auto;
    gap: 2rem;
    grid-template-areas:
        "tempo beat-zone score"
        "controls controls controls"
        "instructions instructions instructions";
}

.tempo-display {
    grid-area: tempo;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.bpm-counter {
    background: rgba(0, 255, 255, 0.1);
    border: 2px solid #00ffff;
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.bpm-value {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #00ffff;
}

.bpm-label {
    font-size: 0.9rem;
    color: #8a2be2;
    letter-spacing: 1px;
}

.tempo-indicator {
    width: 100px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

.tempo-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
    border-radius: 10px;
    transition: width 0.1s ease;
}

.beat-zone {
    grid-area: beat-zone;
    display: flex;
    justify-content: center;
    align-items: center;
}

.beat-circle {
    width: 200px;
    height: 200px;
    border: 3px solid #00ffff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: relative;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.1) 0%, transparent 70%);
    transition: all 0.1s ease;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.4);
}

.beat-circle:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.6);
}

.beat-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid #ff00ff;
    border-radius: 50%;
    opacity: 0;
    transform: scale(0.8);
}

.beat-pulse.active {
    animation: pulseAnimation 0.3s ease-out;
}

@keyframes pulseAnimation {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}

.beat-center {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    z-index: 2;
}

.controls {
    grid-area: controls;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.control-btn {
    padding: 1rem 2rem;
    font-family: 'Orbitron', monospace;
    font-size: 1rem;
    font-weight: 700;
    background: transparent;
    border: 2px solid;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.control-btn:hover::before {
    left: 100%;
}

.start-btn {
    border-color: #00ff00;
    color: #00ff00;
}

.start-btn:hover {
    background: rgba(0, 255, 0, 0.1);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.5);
}

.takeover-btn {
    border-color: #ffff00;
    color: #ffff00;
}

.takeover-btn:hover:not(:disabled) {
    background: rgba(255, 255, 0, 0.1);
    box-shadow: 0 0 20px rgba(255, 255, 0, 0.5);
}

.takeover-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.reset-btn {
    border-color: #ff4444;
    color: #ff4444;
}

.reset-btn:hover {
    background: rgba(255, 68, 68, 0.1);
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.5);
}

.score-panel {
    grid-area: score;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.score-item {
    background: rgba(138, 43, 226, 0.1);
    border: 2px solid #8a2be2;
    border-radius: 10px;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.3);
}

.score-label {
    display: block;
    font-size: 0.8rem;
    color: #8a2be2;
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.score-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ff00ff;
}

.instructions {
    grid-area: instructions;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 15px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.instructions p {
    margin-bottom: 0.5rem;
    color: #b0b0b0;
    font-size: 0.9rem;
}

.audio-visualizer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 4px;
    padding: 10px;
    z-index: -1;
}

.vis-bar {
    width: 6px;
    height: 20px;
    background: linear-gradient(to top, #00ffff, #ff00ff);
    border-radius: 3px;
    animation: visualize 1s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes visualize {
    0%, 100% {
        height: 20px;
        opacity: 0.3;
    }
    50% {
        height: 60px;
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-interface {
        grid-template-columns: 1fr;
        grid-template-areas:
            "beat-zone"
            "tempo"
            "score"
            "controls"
            "instructions";
    }
    
    .title {
        font-size: 2.5rem;
    }
    
    .beat-circle {
        width: 150px;
        height: 150px;
    }
    
    .controls {
        flex-direction: column;
        align-items: center;
    }
    
    .control-btn {
        width: 200px;
    }
}