:root {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --accent-color: #4CAF50;
    --staff-bg: #ffffff;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
}

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

header {
    padding: 1rem;
    background-color: #2d2d2d;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

h1 {
    margin: 0;
    font-size: 1.2rem;
}

#controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

select {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid #444;
    background: #333;
    background: #333;
    color: white;
}

.octave-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: #333;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    border: 1px solid #444;
}

.audio-controls-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #2a2a2a;
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid #444;
}

.slider-control {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
}

.slider-control label {
    font-weight: bold;
    color: #bbb;
}

.slider-control input[type=range] {
    width: 60px;
    cursor: pointer;
}

.control-btn {
    background: #444;
    border: none;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.control-btn:hover {
    background: #555;
}

.control-btn:active {
    background: var(--accent-color);
}

#octave-display {
    font-size: 0.9rem;
    min-width: 70px;
    text-align: center;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 1rem;
    overflow-y: auto;
}

#notation-container {
    background-color: var(--staff-bg);
    border-radius: 8px;
    padding: 20px;
    max-width: 100%;
    overflow-x: auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

#audio-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.overlay-content {
    text-align: center;
    color: white;
    padding: 2rem;
    border: 2px solid var(--accent-color);
    border-radius: 10px;
    background: #222;
}

#audio-overlay.hidden {
    display: none;
}

#chord-display {
    height: 40px;
    margin-bottom: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-align: center;
}

#debug-container {
    width: 100%;
    margin-top: 20px;
    border: 1px solid #555;
    background: #333;
    border-radius: 4px;
    overflow: hidden;
}

#debug-header {
    padding: 0.5rem;
    background: #444;
    color: #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
}

#debug-toggle {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

#debug-log {
    padding: 10px;
    color: #0f0;
    font-family: monospace;
    height: 150px;
    overflow-y: scroll;
    box-sizing: border-box;
    transition: height 0.3s ease;
}

#debug-log.collapsed {
    height: 0;
    padding: 0 10px;
}

footer {
    padding: 0.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: #888;
}