:root {
    --bg: #000;
    --fg: #fff;
    --border: #fff;
    --muted: #888;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background: var(--bg);
    color: var(--fg);
    font-family: 'Consolas', 'Courier New', monospace;
}

#root {
    min-height: 100vh;
}

/* Landing page */

.landing {
    min-height: 100vh;
    background: var(--bg);
}

/* Frets app */

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 20px 80px;
}

.brand {
    align-self: flex-start;
    max-width: 640px;
    width: 100%;
    color: var(--fg);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.brand:hover {
    text-decoration: underline;
}

.panel {
    width: 100%;
    max-width: 640px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 24px;
}

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

.field-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
}

select {
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 4px 8px;
    font-family: inherit;
    font-size: 0.95rem;
}

.tuning {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.notes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
}

.note-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    cursor: pointer;
}

input[type='checkbox'],
input[type='radio'] {
    width: 14px;
    height: 14px;
    accent-color: var(--fg);
    cursor: pointer;
}

.value-toggle {
    flex-direction: row;
    gap: 24px;
}

.value-toggle label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.button {
    align-self: flex-start;
    font-family: inherit;
    font-size: 0.95rem;
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 0;
    padding: 8px 20px;
    cursor: pointer;
}

.button:hover:not(:disabled) {
    background: var(--fg);
    color: var(--bg);
}

.button:disabled {
    color: var(--muted);
    border-color: var(--muted);
    cursor: not-allowed;
}

.error {
    margin: 0;
    color: var(--fg);
}

.spinner {
    width: 48px;
    height: 48px;
    margin-top: 40px;
    filter: grayscale(1) invert(1);
}

.image-container {
    width: 100vw;
    max-width: 100vw;
    margin-top: 32px;
    margin-left: calc(50% - 50vw);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.image-container img {
    display: block;
    width: 100%;
}