:root {
    /* Matrix Theme (Default) */
    --primary-color: #00ff41;
    --primary-color-dim: rgba(0,255,65,0.3);
    --primary-glow: rgba(0,255,65,0.5);
    --gradient-start: #1e3c72;
    --gradient-end: #2a5298;
    --accent-color: #4CAF50;
    --accent-hover: #45a049;
}

[data-theme="cyberpunk"] {
    --primary-color: #ff00ff;
    --primary-color-dim: rgba(255,0,255,0.3);
    --primary-glow: rgba(255,0,255,0.5);
    --gradient-start: #1a0f2e;
    --gradient-end: #4a1058;
    --accent-color: #ff00aa;
    --accent-hover: #cc0088;
}

[data-theme="ocean"] {
    --primary-color: #00ffff;
    --primary-color-dim: rgba(0,255,255,0.3);
    --primary-glow: rgba(0,255,255,0.5);
    --gradient-start: #000046;
    --gradient-end: #1CB5E0;
    --accent-color: #00bcd4;
    --accent-hover: #0097a7;
}

[data-theme="sunset"] {
    --primary-color: #ff8c00;
    --primary-color-dim: rgba(255,140,0,0.3);
    --primary-glow: rgba(255,140,0,0.5);
    --gradient-start: #904e95;
    --gradient-end: #e96443;
    --accent-color: #ff5722;
    --accent-hover: #f4511e;
}

[data-theme="matrix"] {
    --primary-color: #00ff41;
    --primary-color-dim: rgba(0,255,65,0.3);
    --primary-glow: rgba(0,255,65,0.5);
    --gradient-start: #003300;  
    --gradient-end: #006600;    
    --accent-color: #4CAF50;
    --accent-hover: #45a049;
    background-color: #003300;  
}

.theme-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-selector select {
    padding: 8px 12px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    background: #2e2e2e;
    color: var(--primary-color);
    font-size: 0.9em;
    outline: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.theme-selector select:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--primary-color-dim);
}

.theme-selector select option {
    background: #424242;
    color: var(--primary-color);
}

.sound-style-selector {
    position: fixed;
    top: 60px;
    right: 20px;
    z-index: 1000;
}

.sound-style-selector select {
    padding: 8px 12px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    background: #2e2e2e;
    color: var(--primary-color);
    font-size: 0.9em;
    outline: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.sound-style-selector select:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--primary-color-dim);
}

.sound-style-selector select option {
    background: #424242;
    color: var(--primary-color);
}

.preset-selector {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 1000;
}

.preset-selector select {
    padding: 8px 12px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    background: #2e2e2e;
    color: var(--primary-color);
    font-size: 0.9em;
    outline: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.preset-selector select:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--primary-color-dim);
}

.preset-selector select option {
    background: #424242;
    color: var(--primary-color);
}

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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
    max-width: 1200px;
    padding: 20px;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.controls {
    margin: 30px 0;
    display: flex;
    gap: 15px;
    justify-content: center;
}

.play-btn, .stop-btn, .reset-btn {
    padding: 15px 30px;
    font-size: 1.2em;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.play-btn {
    background: var(--accent-color);
    color: white;
}

.stop-btn {
    background: #f44336;
    color: white;
}

.reset-btn {
    background: #ff9800;
    color: white;
}

.play-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.stop-btn:hover {
    background: #da190b;
    transform: scale(1.05);
}

.reset-btn:hover {
    background: #e68900;
    transform: scale(1.05);
}

.binary-display {
    margin: 30px 0;
    padding: 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.binary-number {
    font-family: 'Courier New', monospace;
    font-size: 2.5em;
    font-weight: bold;
    letter-spacing: 8px;
    margin-bottom: 10px;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-glow);
}

.decimal-value {
    font-size: 1.2em;
    color: #ccc;
}

.note-selector {
    margin: 30px 0;
    padding: 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.note-selector h3 {
    margin-bottom: 20px;
    color: #fff;
}

.note-controls {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    max-width: 800px;
    margin: 0 auto;
}

.note-control {
    background: rgba(255,255,255,0.2);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.note-control label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    font-size: 0.9em;
}

.note-control select {
    width: 100%;
    padding: 8px;
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    background: #2e2e2e;
    color: var(--primary-color);
    font-size: 0.9em;
    margin-bottom: 5px;
    outline: none;
    transition: all 0.3s ease;
}

.note-control select:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--primary-color-dim);
}

.note-control select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 15px var(--primary-glow);
}

.note-control select option {
    background: #424242;
    color: var(--primary-color);
}

.piano-bits {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.piano-bit {
    width: 80px;
    height: 100px;
    border: 3px solid #333;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    background: #222;
    cursor: pointer;
}

.piano-bit.active {
    background: var(--primary-color);
    color: #000;
    box-shadow: 0 0 20px var(--primary-glow);
    transform: scale(1.1);
}

.bit-position {
    font-size: 0.8em;
    margin-bottom: 5px;
    color: #999;
}

.piano-bit.active .bit-position {
    color: #000;
}

.bit-value {
    font-size: 2em;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

.bit-note {
    font-size: 0.7em;
    margin-top: 5px;
    color: #999;
}

.bit-tone {
    font-size: 0.7em;
    color: #999;
}

.piano-bit.active .bit-note {
    color: #000;
}

.piano-bit.active .bit-tone {
    color: #000;
}

.volume-control {
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.volume-control label {
    margin-bottom: 10px;
    color: #fff;
}

.volume-control input[type="range"] {
    width: 200px;
    -webkit-appearance: none;
    background: rgba(255,255,255,0.2);
    outline: none;
    border-radius: 10px;
    overflow: hidden;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    box-shadow: -200px 0 0 200px var(--primary-color-dim);
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
}

.position-control {
    margin: 20px 0;
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
}

.add-btn, .remove-btn {
    padding: 10px 20px;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: bold;
}

.add-btn {
    background: var(--accent-color);
    color: white;
}

.remove-btn {
    background: #f44336;
    color: white;
}

.add-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.remove-btn:hover {
    background: #da190b;
    transform: scale(1.05);
}

.position-count {
    font-size: 1.1em;
    color: #fff;
}

.speed-control {
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.speed-control label {
    margin-bottom: 10px;
    color: #fff;
}

.speed-control input[type="range"] {
    width: 200px;
    -webkit-appearance: none;
    background: rgba(255,255,255,0.2);
    outline: none;
    border-radius: 10px;
    overflow: hidden;
}

.speed-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
    box-shadow: -200px 0 0 200px var(--primary-color-dim);
}

.speed-control input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    cursor: pointer;
    border-radius: 50%;
}

@media (max-width: 768px) {
    .note-controls {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .piano-bits {
        gap: 5px;
    }
    
    .piano-bit {
        width: 60px;
        height: 80px;
    }
    
    .binary-number {
        font-size: 1.8em;
        letter-spacing: 4px;
    }
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background:;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 0px;
    border: 0px solid #111;
}