:root {
    /* Surfaces */
    --bg: #111413;
    --surface: #181c1a;
    --surface-hover: #1d2220;

    /* Text ladder, brightest to dimmest */
    --text-1: #ecefed;
    --text-2: #d8dcda;
    --text-3: #bcc2bf;
    --text-4: #a2a9a5;
    --text-5: #878e8a;
    --text-6: #6b716d;

    /* Green */
    --accent: #7cb496;
    --accent-hover: #9bcdb1;
    --accent-dim: #4f8a6b;

    /* Edges */
    --edge: rgba(255, 255, 255, 0.06);
    --edge-hover: rgba(255, 255, 255, 0.1);
    --line: rgba(255, 255, 255, 0.08);

    --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    --max-width: 50rem;
    --radius: 0.7rem;
    --radius-small: 0.3rem;
    --ease: 0.25s ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text-4);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
}

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

a:hover {
    color: var(--accent-hover);
}

a:focus-visible {
    outline: 1px solid var(--accent-dim);
    outline-offset: 3px;
    border-radius: 2px;
}

.page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 2rem;
    flex-wrap: wrap;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--line);
}

.brand {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-2);
}

.brand span {
    font-weight: 400;
    color: var(--text-6);
}

.brand:hover {
    color: var(--text-1);
}

.nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
}

.nav a {
    color: var(--text-5);
}

.nav a:hover,
.nav a[aria-current="page"] {
    color: var(--text-2);
}

/* Hero */

.hero {
    padding: 5rem 0 0;
    text-align: center;
}

.eyebrow {
    margin: 0 0 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-dim);
}

h1 {
    margin: 0;
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--text-1);
}

.subtitle {
    margin: 1.25rem auto 0;
    max-width: 34rem;
    color: var(--text-4);
}

/* Sections */

.section {
    padding: 5rem 0 0;
}

h2 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--text-2);
    text-align: center;
}

.section-note {
    margin: 0.75rem auto 0;
    max-width: 32rem;
    font-size: 0.9rem;
    color: var(--text-5);
    text-align: center;
}

/* Cards */

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1rem;
    margin-top: 2.25rem;
}

.card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: var(--surface);
    border: 1px solid var(--edge);
    border-radius: var(--radius);
    transition:
        background-color var(--ease),
        border-color var(--ease);
}

.card:hover {
    background-color: var(--surface-hover);
    border-color: var(--edge-hover);
}

.card h3 {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-2);
}

.card p:not(.card-links) {
    margin: 0.625rem 0 1.25rem;
    font-size: 0.9rem;
    color: var(--text-5);
}

.card-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    font-size: 0.85rem;
}

.card .card-links {
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--edge);
}

/* Fact panel */

.facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 1px;
    margin-top: 2.25rem;
    background-color: var(--edge);
    border: 1px solid var(--edge);
    border-radius: var(--radius);
    overflow: hidden;
}

.facts > div {
    padding: 1.5rem;
    background-color: var(--bg);
}

.facts dt {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-6);
}

.facts dd {
    margin: 0.5rem 0 0;
    font-size: 0.95rem;
    color: var(--text-3);
}

/* Document list */

.docs {
    margin: 2.25rem 0 0;
    padding: 0;
    list-style: none;
    border: 1px solid var(--edge);
    border-radius: var(--radius);
    overflow: hidden;
}

.docs li {
    border-top: 1px solid var(--edge);
}

.docs li:first-child {
    border-top: 0;
}

.docs a {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.25rem 1rem;
    padding: 1.125rem 1.5rem;
    background-color: var(--surface);
    transition: background-color var(--ease);
}

.docs a:hover {
    background-color: var(--surface-hover);
}

.docs strong {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent);
    transition: color var(--ease);
}

.docs a:hover strong {
    color: var(--accent-hover);
}

.docs span {
    font-size: 0.875rem;
    color: var(--text-5);
}

/* Footer */

.footer {
    margin-top: 6rem;
    padding: 1.75rem 0 3rem;
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 2rem;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-6);
}

.footer-links {
    display: flex;
    gap: 1.25rem;
}

.footer-links a {
    color: var(--text-5);
}

.footer-links a:hover {
    color: var(--text-2);
}

@media (max-width: 36rem) {
    .page {
        padding: 0 1.25rem;
    }

    .hero {
        padding-top: 3.5rem;
    }

    h1 {
        font-size: 1.9rem;
    }

    .section {
        padding-top: 3.5rem;
    }

    .facts {
        grid-template-columns: 1fr;
    }

    .footer {
        margin-top: 4rem;
    }
}