:root {
    --bg-dark: #121212;
    --bg-panel: #1e1e1e;
    --bg-hover: #2a2a2a;
    --border-color: #333;
    --primary-color: #00e5ff; /* Cyan */
    --accent-color: #ff00ff; /* Magenta */
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --waveform-color: #00e5ff;
    --waveform-bg: #000000;
    --selection-color: rgba(255, 0, 255, 0.3);
    --cursor-color: #ff0000;

    --font-ui: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-ui);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Header */
.app-header {
    height: 60px;
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000;
}

.btn-primary:hover {
    background-color: #00b8cc;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
}

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

/* Workspace */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.toolbar {
    height: 40px;
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 10px;
    gap: 10px;
    flex-shrink: 0;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 5px;
}

.tool-divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
    margin: 0 5px;
}

.tool-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.tool-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

#zoom-level {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: center;
}

/* Track List */
.track-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background-color: #0a0a0a;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
}

.track-item {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.track-header {
    padding: 8px 12px;
    background-color: #252525;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.track-title {
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.track-controls {
    display: flex;
    gap: 8px;
}

.track-controls button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

.track-controls button:hover {
    color: #ff4444;
}

.track-waveform {
    height: 120px;
    position: relative;
    background-color: var(--waveform-bg);
}

.track-waveform canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Scrollbar Container */
#timeline-scroll-container {
    height: 16px;
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    overflow-x: auto;
    overflow-y: hidden;
    flex-shrink: 0;
}

#timeline-scroll-content {
    height: 1px;
}

/* Footer Controls */
.playback-controls {
    height: 60px;
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0 20px;
    flex-shrink: 0;
}

.time-display {
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-size: 0.9rem;
}

.transport-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.control-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.play-btn {
    width: 48px;
    height: 48px;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.play-btn:hover {
    background-color: rgba(0, 229, 255, 0.1);
}

.volume-control {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    color: var(--text-secondary);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

/* Utility */
.hidden {
    display: none !important;
}