:root {
    --bg-main: #0d0d12;
    --bg-panel: #16161d;
    --bg-panel-dark: #0f0f15;
    --text-main: #ffffff;
    --text-muted: #80808e;
    --accent-blue: #70a4ff;
    --accent-blue-hover: #8cb8ff;
    --accent-green: #00ff88;
    --border-color: #2a2a35;
    --font-ui: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-ui);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    background: var(--accent-blue);
    color: var(--bg-main);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    border-radius: 4px;
}

.logo h1 {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo .light-text {
    font-weight: 400;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-blue);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 100%;
    max-width: 900px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.panel-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.blue-dot {
    background: var(--accent-blue);
}

/* Upload Area */
.upload-area {
    background: var(--bg-panel-dark);
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    text-align: center;
    position: relative;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    margin-bottom: 2rem;
}

.upload-area:hover {
    border-color: var(--accent-blue);
    background: #1a1a24;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--accent-blue);
}

.file-name {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-main);
    word-break: break-all;
}

/* Player Section */
.player-section {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 1.5rem;
}

.time-display {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 400;
    color: var(--accent-blue);
    line-height: 1;
}

.time-display .ms {
    font-size: 1.5rem;
    color: var(--text-muted);
}

.controls {
    display: flex;
    gap: 1rem;
}

.btn {
    border: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.btn-icon {
    width: 48px;
    height: 48px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn-icon:hover:not(:disabled) {
    background: var(--border-color);
    color: var(--text-main);
}

.btn-primary {
    width: 64px;
    height: 48px;
    background: var(--accent-blue);
    color: var(--bg-main);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-blue-hover);
}

/* Visualizer */
.visualizer-container {
    height: 120px;
    background: var(--bg-panel-dark);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.playhead {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.5);
    left: 0;
    pointer-events: none;
    box-shadow: 0 0 10px rgba(255,255,255,0.5);
}

/* FX Controls */
.fx-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.control-header label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.value-display {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-blue);
}

/* Custom Sliders */
.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-panel-dark);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(112, 164, 255, 0.5);
}

.slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    border: none;
}

/* Toggle Switch */
.switch-group {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-switch {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-panel-dark);
    border: 1px solid var(--border-color);
    transition: .4s;
}

.slider-switch:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-muted);
    transition: .4s;
}

input:checked + .slider-switch {
    background-color: rgba(112, 164, 255, 0.2);
    border-color: var(--accent-blue);
}

input:checked + .slider-switch:before {
    transform: translateX(26px);
    background-color: var(--accent-blue);
    box-shadow: 0 0 10px rgba(112, 164, 255, 0.5);
}

.slider-switch.round {
    border-radius: 24px;
}

.slider-switch.round:before {
    border-radius: 50%;
}

/* Footer */
.app-footer {
    display: flex;
    justify-content: space-between;
    padding: 1rem 2rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    border-top: 1px solid var(--border-color);
}

.status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--accent-green);
    border-radius: 50%;
    margin-right: 6px;
    box-shadow: 0 0 8px var(--accent-green);
}

.separator {
    margin: 0 0.5rem;
    color: var(--border-color);
}