:root {
    --bg: #ffffff;
    --fg: #1a1a2e;
    --bg-secondary: #f5f5f7;
    --border: #d1d1d6;
    --accent: #0071e3;
    --accent-hover: #0060c0;
    --input-bg: #ffffff;
    --input-border: #c7c7cc;
    --input-focus: #0071e3;
    --code-bg: #f0f0f3;
    --success-bg: #e8f5e9;
    --success-border: #4caf50;
    --error-bg: #fdecea;
    --error-border: #f44336;
    --error-fg: #c62828;
    --hint-fg: #8e8e93;
    --font-mono: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;

    --severity-none: #636366;
    --severity-none-bg: #f0f0f3;
    --severity-low: #34c759;
    --severity-low-bg: #e8f5e9;
    --severity-medium: #f5a623;
    --severity-medium-bg: #fff8e1;
    --severity-high: #ff6b35;
    --severity-high-bg: #fff3e0;
    --severity-critical: #ff3b30;
    --severity-critical-bg: #fdecea;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1c1c1e;
        --fg: #f5f5f7;
        --bg-secondary: #2c2c2e;
        --border: #48484a;
        --accent: #0a84ff;
        --accent-hover: #409cff;
        --input-bg: #2c2c2e;
        --input-border: #48484a;
        --input-focus: #0a84ff;
        --code-bg: #3a3a3c;
        --success-bg: #1b3a1b;
        --success-border: #4caf50;
        --error-bg: #3a1b1b;
        --error-border: #f44336;
        --error-fg: #ef9a9a;
        --hint-fg: #98989d;

        --severity-none: #98989d;
        --severity-none-bg: #2c2c2e;
        --severity-low: #30d158;
        --severity-low-bg: #1b3a1b;
        --severity-medium: #ffd60a;
        --severity-medium-bg: #3a351b;
        --severity-high: #ff9f0a;
        --severity-high-bg: #3a2a1b;
        --severity-critical: #ff453a;
        --severity-critical-bg: #3a1b1b;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.5;
    padding: 2rem 1rem;
}

.container {
    max-width: 680px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.badge {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.85em;
    padding: 0.1em 0.45em;
    border-radius: 6px;
    vertical-align: baseline;
}

.subtitle {
    color: var(--hint-fg);
    font-size: 0.95rem;
}

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

.subtitle a:hover {
    text-decoration: underline;
}

.input-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.vector-input {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    padding: 0.6rem 0.8rem;
    border: 2px solid var(--input-border);
    border-radius: 10px;
    background: var(--input-bg);
    color: var(--fg);
    outline: none;
    transition: border-color 0.2s;
}

.vector-input:focus {
    border-color: var(--input-focus);
}

.vector-input::placeholder {
    color: var(--hint-fg);
    opacity: 0.7;
}

.share-btn {
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--border);
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--fg);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    white-space: nowrap;
}

.share-btn:hover:not(:disabled) {
    background: var(--border);
}

.share-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.share-btn.copied {
    border-color: var(--success-border);
    color: var(--success-border);
}

.hint {
    color: var(--hint-fg);
    font-style: italic;
    text-align: center;
    padding: 2rem 0;
}

.error {
    background: var(--error-bg);
    border: 2px solid var(--error-border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    color: var(--error-fg);
}

.error strong {
    display: block;
    margin-bottom: 0.25rem;
}

.success {
    background: var(--success-bg);
    border: 2px solid var(--success-border);
    border-radius: 10px;
    padding: 1.25rem;
}

.score-banner {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.version-badge {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.2em 0.6em;
    border-radius: 6px;
    background: var(--code-bg);
    color: var(--fg);
}

.nomenclature-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.2em 0.5em;
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--hint-fg);
}

.score {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

.severity-label {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.15em 0.6em;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.severity-none { color: var(--severity-none); }
.severity-low { color: var(--severity-low); }
.severity-medium { color: var(--severity-medium); }
.severity-high { color: var(--severity-high); }
.severity-critical { color: var(--severity-critical); }

.severity-label.severity-none { background: var(--severity-none-bg); }
.severity-label.severity-low { background: var(--severity-low-bg); }
.severity-label.severity-medium { background: var(--severity-medium-bg); }
.severity-label.severity-high { background: var(--severity-high-bg); }
.severity-label.severity-critical { background: var(--severity-critical-bg); }

.scores-detail {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.score-item strong {
    font-family: var(--font-mono);
}

.metric-group {
    margin-top: 1rem;
}

.metric-group h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--hint-fg);
    margin-bottom: 0.4rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid var(--border);
}

.metrics {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.metrics tr:not(:last-child) {
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
}

.metrics td {
    padding: 0.3rem 0.5rem;
    vertical-align: top;
}

.metric-abbr {
    width: 3.5rem;
    white-space: nowrap;
}

.metric-abbr code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    font-weight: 600;
    background: var(--code-bg);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

.metric-name {
    color: var(--hint-fg);
}

.metric-value code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 0.1em 0.35em;
    border-radius: 4px;
}

footer {
    text-align: center;
    margin-top: 2.5rem;
    color: var(--hint-fg);
    font-size: 0.85rem;
}

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

footer a:hover {
    text-decoration: underline;
}