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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #14141f;
    --bg-tertiary: #1a1a2e;
    --accent-primary: #00ff88;
    --accent-secondary: #00cc6a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0c0;
    --border-color: #2a2a3e;
    --shadow-color: rgba(0, 255, 136, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0;
    position: relative;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 10px var(--shadow-color)); }
    to { filter: drop-shadow(0 0 20px var(--shadow-color)); }
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 20px;
}

.language-selector {
    position: absolute;
    top: 0;
    right: 0;
}

.language-selector select {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-selector select:hover {
    border-color: var(--accent-primary);
}

section {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

section:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px var(--shadow-color);
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.preset-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 20px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.preset-btn:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.preset-btn:active {
    transform: translateY(0);
}

.preset-btn .icon {
    font-size: 2rem;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.control-group label {
    color: var(--text-secondary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-group select,
.control-group input[type="range"] {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 8px;
    width: 100%;
}

.control-group select {
    cursor: pointer;
}

input[type="range"] {
    -webkit-appearance: none;
    height: 8px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--shadow-color);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.control-group span {
    color: var(--accent-primary);
    font-weight: 600;
    text-align: center;
}

.effects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.effect-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 15px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.effect-checkbox:hover {
    border-color: var(--accent-primary);
}

.effect-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.action-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 15px 30px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.action-btn.primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.action-btn.primary:hover {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.action-btn.success {
    background: #00cc6a;
    color: var(--bg-primary);
    border-color: #00cc6a;
}

.action-btn.success:hover {
    background: #00a055;
    border-color: #00a055;
}

.visualizer {
    height: 200px;
    position: relative;
    overflow: hidden;
}

#waveformCanvas {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-secondary);
}

footer p {
    font-size: 14px;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .preset-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

    .controls-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 20px;
    }

    .action-btn {
        padding: 12px 20px;
        font-size: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}