:root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8b949e;
    --accent: #58a6ff;
    --edge: #3fb950;
    --edge-bg: rgba(63, 185, 80, 0.15);
    --border: #30363d;
    --card: #161b22;
    --warn: #f0883e;
}

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

h2 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
}

.subtitle {
    color: var(--muted);
    max-width: 600px;
    margin: 0 auto;
}

section {
    margin-bottom: 3rem;
}

p {
    margin-bottom: 0.75rem;
    color: var(--fg);
}

code {
    background: var(--card);
    color: var(--accent);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9em;
}

pre {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin: 0.5rem 0;
}

pre code {
    background: none;
    padding: 0;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* === Input === */

.input-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

input[type="text"] {
    flex: 1;
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--fg);
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    font-family: 'SF Mono', Consolas, monospace;
    font-size: 0.9rem;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
}

button {
    background: var(--accent);
    color: var(--bg);
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
}

button:hover {
    opacity: 0.9;
}

/* === Npub display === */

.npub-display {
    font-family: 'SF Mono', Consolas, monospace;
    font-size: 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    word-break: break-all;
    margin-bottom: 0.5rem;
}

.edge {
    color: var(--edge);
    background: var(--edge-bg);
    padding: 0.1rem 0.15rem;
    border-radius: 3px;
    font-weight: 600;
}

.stats {
    color: var(--muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.stats strong {
    color: var(--fg);
}

/* === Bar chart === */

.chart {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
}

.chart-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.chart-label {
    width: 2rem;
    text-align: right;
    color: var(--muted);
    font-family: monospace;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.chart-bars {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 2px;
}

.bar-container {
    display: flex;
    align-items: center;
    width: 50%;
    min-width: 150px;
}

.suffix-side {
    justify-content: flex-end;
}

.prefix-side {
    justify-content: flex-start;
}

.bar {
    height: 1.1rem;
    border-radius: 3px;
    transition: width 0.2s ease;
}

.bar.prefix {
    background: var(--accent);
    opacity: 0.5;
}

.bar.suffix {
    background: var(--warn);
    opacity: 0.5;
}

.bar.best {
    opacity: 1;
}

.bar.prefix.best {
    background: var(--edge);
    box-shadow: 0 0 8px rgba(63, 185, 80, 0.4);
}

.bar.suffix.best {
    background: var(--edge);
    box-shadow: 0 0 8px rgba(63, 185, 80, 0.4);
}

.bar-value {
    font-family: monospace;
    font-size: 0.75rem;
    color: var(--muted);
    padding: 0 4px;
    min-width: 2.5rem;
}

.prefix-side .bar-value {
    text-align: left;
}

.suffix-side .bar-value {
    text-align: right;
}

.bar-suffix-label, .bar-prefix-label {
    font-size: 0.8rem;
    color: var(--muted);
    width: 50%;
    min-width: 150px;
}

.bar-suffix-label {
    text-align: right;
}

/* === Gallery === */

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 1rem;
}

.gallery-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
}

.gallery-card.mined {
    border-color: var(--edge);
}

.gallery-label {
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gallery-card.mined .gallery-label {
    color: var(--edge);
}

.gallery-npub {
    font-family: 'SF Mono', Consolas, monospace;
    font-size: 0.85rem;
    word-break: break-all;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.gallery-stats {
    font-size: 0.85rem;
    color: var(--muted);
}

.gallery-stats strong {
    color: var(--fg);
}

/* === Tables === */

.example-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.5rem 0 1.5rem;
}

.example-table th,
.example-table td {
    text-align: left;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.example-table th {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.85rem;
}

/* === Footer === */

footer {
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

/* === Alphabet display === */

.alphabet-display {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    margin: 1rem 0;
}

.charset {
    font-family: 'SF Mono', Consolas, monospace;
    font-size: 1.1rem;
    letter-spacing: 0.15rem;
    color: var(--accent);
    word-break: break-all;
}

/* === Entropy spectrum === */

.entropy-spectrum {
    margin: 1.5rem 0;
}

.spectrum-bar {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(to right, var(--edge), var(--warn), var(--muted));
    position: relative;
    margin-bottom: 0.5rem;
}

.spectrum-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border-radius: 6px;
}

.spectrum-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--muted);
    text-align: center;
}

.spectrum-left {
    color: var(--edge);
    text-align: left;
}

.spectrum-mid {
    color: var(--warn);
}

.spectrum-right {
    color: var(--muted);
    text-align: right;
}

.spectrum-labels small {
    color: var(--muted);
    font-size: 0.7rem;
}