:root {
    --md-primary: #00a6fb;
    --md-on-primary: #00243d;
    --md-background: #f4f6fb;
    --md-on-background: #1a1c1e;
    --md-surface: #ffffff;
    --md-on-surface: #1a1c1e;
    --md-outline: #5b7290;
    --md-border: #d0d7e2;
    --mono: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --md-primary: #00a6fb;
        --md-on-primary: #eaf7ff;
        --md-background: #101318;
        --md-on-background: #e2e2e6;
        --md-surface: #171b21;
        --md-on-surface: #e2e2e6;
        --md-outline: #93a8c4;
        --md-border: #2a323d;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--sans);
    background: var(--md-background);
    color: var(--md-on-background);
}

a {
    color: var(--md-primary);
}

/* Header */

.masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: var(--md-surface);
    border-bottom: 1px solid var(--md-border);
}

.masthead__title {
    font-family: var(--mono);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--md-on-surface);
    text-decoration: none;
}

.nav-bar {
    display: flex;
    gap: 20px;
}

.nav-bar a {
    font-family: var(--mono);
    color: var(--md-outline);
    text-decoration: none;
    font-size: 0.8125rem;
}

.nav-bar a:hover,
.nav-bar a[aria-current="page"] {
    color: var(--md-primary);
}

main {
    flex: 1;
    width: 100%;
}

.main {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Home: 3-block grid */

.block-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.block {
    display: block;
    padding: 24px;
    background: var(--md-surface);
    border: 1px solid var(--md-border);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.block:hover {
    border-color: var(--md-primary);
    background: color-mix(in srgb, var(--md-primary) 6%, var(--md-surface));
}

.block h2 {
    margin: 8px 0 4px;
    font-size: 1.125rem;
    font-weight: 600;
}

.block p {
    margin: 0;
    color: var(--md-outline);
    font-size: 0.875rem;
}

/* Shared technical label */

.block__label {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--md-primary);
    letter-spacing: 0.5px;
}

/* Section listing */

.page-title {
    margin: 8px 0 24px;
    font-size: 1.5rem;
    font-weight: 600;
}

.item-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.item-list li {
    padding: 16px 0;
    border-bottom: 1px solid var(--md-border);
}

.item-list a {
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--md-on-surface);
    text-decoration: none;
}

.item-list a:hover {
    color: var(--md-primary);
}

.item-list time {
    display: inline-block;
    margin-left: 8px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--md-outline);
}

.item-list .summary {
    margin: 4px 0 0;
    color: var(--md-outline);
    font-size: 0.875rem;
}

/* Single page/post */

.single time {
    display: block;
    margin-top: 8px;
    font-family: var(--mono);
    font-size: 0.8125rem;
    color: var(--md-outline);
}

.single h1 {
    margin: 8px 0 0;
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.2;
}

.ai-disclosure {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding: 6px 12px;
    background: var(--md-surface);
    border: 1px solid var(--md-border);
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--md-outline);
}

.ai-disclosure__badge {
    font-weight: 700;
    color: var(--md-primary);
    letter-spacing: 0.5px;
}

.prose {
    margin-top: 24px;
}

.prose p {
    line-height: 1.7;
    margin-bottom: 1.2em;
}

.prose h2 {
    margin: 36px 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--md-border);
    font-family: var(--mono);
    font-size: 1.1875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prose h2:first-child {
    margin-top: 0;
}

.prose h3 {
    margin: 20px 0 8px;
    font-family: var(--mono);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--md-primary);
}

.prose ul,
.prose ol {
    padding-left: 1.25em;
    line-height: 1.7;
    margin-bottom: 1.2em;
}

.prose li {
    margin-bottom: 0.4em;
}

.prose strong {
    font-weight: 600;
}

.prose table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5em;
    font-size: 0.9375rem;
    display: block;
    overflow-x: auto;
}

.prose th,
.prose td {
    text-align: left;
    padding: 8px 12px;
    border-bottom: 1px solid var(--md-border);
    vertical-align: top;
    overflow-wrap: break-word;
}

.prose th {
    font-family: var(--mono);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--md-outline);
    font-weight: 700;
    white-space: nowrap;
}

.prose td:nth-child(2) {
    font-family: var(--mono);
    font-size: 0.8125rem;
}

footer {
    padding: 16px 24px;
    text-align: center;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--md-outline);
    border-top: 1px solid var(--md-border);
}

/* Responsive */

@media (max-width: 720px) {
    .block-grid {
        grid-template-columns: 1fr;
    }
}