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

body {
    font-family: 'Comic Sans MS', 'Chalkboard SE', 'Comic Neue', cursive, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    animation: bounceIn 0.8s ease-out;
}

header h1 {
    font-size: 3rem;
    color: white;
    text-shadow: 3px 3px 0px rgba(0,0,0,0.2);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

header p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    text-shadow: 1px 1px 0px rgba(0,0,0,0.1);
}

.playground {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: start;
}

.wave-display h2 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.3rem;
    color: #2d3748;
    text-shadow: 1px 1px 0px rgba(0,0,0,0.1);
}

.wave-display {
    background: rgba(255,255,255,0.95);
    border-radius: 25px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 3px solid #4a5568;
    transform: rotate(-1deg);
    transition: transform 0.3s ease;
}

.wave-display:hover {
    transform: rotate(0deg) scale(1.02);
}

.canvas-container {
    position: relative;
    margin-bottom: 20px;
}

.wave-canvas {
    width: 100%;
    height: 200px;
    border: 2px dashed #cbd5e0;
    border-radius: 15px;
    background: #f7fafc;
    margin-bottom: 15px;
}

.wave-canvas.individual {
    opacity: 0;
    transform: translateY(-20px);
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.wave-canvas.individual.active {
    opacity: 1;
    transform: translateY(0);
}

.wave-labels {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: linear-gradient(135deg, #ffd89b 0%, #19547b 100%);
    color: white;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.individual-label {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.sum-label {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.controls {
    background: rgba(255,255,255,0.95);
    border-radius: 25px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    border: 3px solid #4a5568;
    transform: rotate(1deg);
    transition: transform 0.3s ease;
}

.controls:hover {
    transform: rotate(0deg) scale(1.02);
}

.controls h2 {
    text-align: center;
    margin-bottom: 15px;
    font-size: 1.3rem;
    color: #2d3748;
    text-shadow: 1px 1px 0px rgba(0,0,0,0.1);
}

.sliders-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.slider-group {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    padding: 8px 12px;
    border-radius: 12px;
    border: 2px solid #0284c7;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-group:hover {
    transform: translateX(-5px);
    box-shadow: 5px 5px 15px rgba(0,0,0,0.2);
}

.slider-group.active {
    background: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%);
    border-color: #ec4899;
    animation: pulse 0.6s ease-in-out;
}

.frequency-label {
    font-weight: bold;
    color: #1e293b;
    font-size: 0.9rem;
    min-width: 60px;
}

.frequency-value {
    background: #3b82f6;
    color: white;
    padding: 2px 6px;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: bold;
    min-width: 35px;
    text-align: center;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 8px;
    background: linear-gradient(90deg, #cbd5e0 0%, #4a5568 100%);
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
}

.slider:hover {
    transform: scaleY(1.2);
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: radial-gradient(circle, #fbbf24 0%, #f59e0b 100%);
    cursor: pointer;
    border: 2px solid #92400e;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
    background: radial-gradient(circle, #fcd34d 0%, #fbbf24 100%);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: radial-gradient(circle, #fbbf24 0%, #f59e0b 100%);
    cursor: pointer;
    border: 2px solid #92400e;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.preset-btn {
    padding: 12px 15px;
    border: none;
    border-radius: 15px;
    font-weight: bold;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
}

.preset-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.preset-btn:hover::before {
    width: 300px;
    height: 300px;
}

.preset-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.preset-btn:nth-child(1) {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.preset-btn:nth-child(2) {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.preset-btn:nth-child(3) {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
}

.preset-btn:nth-child(4) {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    color: white;
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3) translateY(-50px);
    }
    50% {
        transform: scale(1.05) translateY(10px);
    }
    70% {
        transform: scale(0.9) translateY(-5px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@media (max-width: 968px) {
    .playground {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .wave-display, .controls {
        transform: none;
    }
    
    .wave-display:hover, .controls:hover {
        transform: scale(1.02);
    }
}