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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background-color: #1a1a1a;
    color: #e0e0e0;
}

.app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #e0e0e0;
}

#grid-panel {
    border: 1px solid #444;
    margin: 0 auto;
    max-width: 100vw;
    overflow: auto;
}

#mode-toggle {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
    font-size: 16px;
}

#mode-toggle label {
    cursor: pointer;
    color: #e0e0e0;
}

#controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
}

#chord-controls, #scale-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

#controls label {
    color: #e0e0e0;
    font-size: 16px;
}

#controls select {
    padding: 5px;
    font-size: 16px;
    background: #2a2a2a;
    color: #e0e0e0;
    border: 1px solid #555;
}

#controls button {
    padding: 5px 10px;
    font-size: 16px;
    cursor: pointer;
    border: 1px solid #555;
    background: #2a2a2a;
    color: #e0e0e0;
}

#controls button:hover {
    background: #3a3a3a;
}

#voice-leading-label, #sevenths-label {
    margin-left: 8px;
    cursor: pointer;
    white-space: nowrap;
}

#info-panel {
    max-width: 100%;
    margin-top: 16px;
    padding: 12px 16px;
    background: #2a2a2a;
    border: 1px solid #444;
    font-size: 14px;
    text-align: center;
    min-height: 24px;
}

#info-panel:empty {
    display: none;
}

#info-panel h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #e0e0e0;
}

.chord-degrees {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.degree {
    padding: 4px 8px;
    border: 1px solid #555;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.degree:hover {
    background: #3a3a3a;
}

.scale-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.scale-item {
    padding: 4px 8px;
    border: 1px solid #555;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.scale-item:hover {
    background: #3a3a3a;
}