:root {
    --font: Inter, system-ui, sans-serif;
    --text: #16181d;
    --muted: #5c606a;
    --brand: #7ce38b;
    --rule: #e6e7ea;
    --nav-height: 64px;
    --content-width: 800px;
    --measure: 64ch;
}

/* ---------- base ---------- */

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

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

a:focus-visible {
    outline: 2px solid var(--text);
    outline-offset: 3px;
}

h1, h2, p { margin: 0; }

/* one rule for "centered column", reused everywhere */
.container {
    max-width: var(--content-width);
    margin-inline: auto;
    padding-inline: 24px;
}

/* ---------- nav ---------- */

.nav {
    display: flex;
    align-items: center;
    gap: 40px;
    height: var(--nav-height);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.brand-mark {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a:hover { color: var(--muted); }

.lang-switch {
    margin: 0 0 0 auto;
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    color: var(--muted);
}

.lang-switch [aria-current] {
    color: var(--text);
    font-weight: 600;
}

.lang-switch a:hover { color: var(--text); }

/* ---------- hero ---------- */

.hero {
    padding-block: 160px 112px;
}

.mission {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

/* ---------- essay ---------- */

.essay {
    max-width: var(--measure);
}

.essay section + section {
    margin-top: 80px;
}

.essay h2 {
    font-size: 1.375rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.01em;
    margin-bottom: 24px;
}

.numeral {
    color: var(--muted);
    font-weight: 500;
    margin-right: 0.35em;
}

.essay p {
    font-size: 1.125rem;
}

.essay p + p {
    margin-top: 1.4em;
}

.essay ul {
    max-width: var(--measure);
    margin: 1.4em 0 0;
    padding-left: 1.5em;
    list-style: none;
    font-size: 1.125rem;
}

.essay li {
    position: relative;
}

.essay li + li {
    margin-top: 0.9em;
}

.essay li::before {
    content: "\2014";          /* em dash, in place of a bullet */
    position: absolute;
    left: -1.5em;
    color: var(--muted);
}

.essay li strong {
    font-weight: 600;
}

.essay a {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-decoration-color: var(--muted);
    text-underline-offset: 4px;
}

.essay a:hover {
    text-decoration-color: var(--text);
}

.byline {
    margin-top: 80px;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
    color: var(--muted);
    font-size: 1rem;
}

.footer {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 64px;        /* was 112px — less needed without the rule */
    padding-block: 0 48px;   /* no top padding, just bottom */
    font-size: 0.875rem;
    color: var(--muted);
}

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

/* ---------- sub-page head ---------- */

.page-head {
    padding-block: 128px 64px;
}

.page-kicker {
    margin: 0 0 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.page-kicker a:hover { color: var(--text); }

.page-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
}

.page-intro {
    margin-top: 24px;
    max-width: var(--measure);
    font-size: 1.125rem;
    color: var(--muted);
}

/* ---------- post list ---------- */

.post-list {
    margin: 0 0 96px;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--text);
}

.post-item {
    border-bottom: 1px solid var(--rule);
}

.post-link {
    display: grid;
    grid-template-columns: 9rem 1fr;
    gap: 40px;
    align-items: start;
    padding-block: 32px;
}

.post-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-top: 0.35em;
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.04em;
    color: var(--muted);
}

.post-number {
    color: var(--text);
    font-weight: 600;
}

.post-title {
    display: block;
    font-size: 1.375rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.01em;
}

.post-excerpt {
    display: block;
    margin-top: 10px;
    max-width: var(--measure);
    font-size: 1rem;
    color: var(--muted);
}

.post-link:hover .post-title {
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* ---------- single post ---------- */

.post-head {
    max-width: var(--measure);
    padding-block: 128px 56px;
}

.post-heading {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.post-standfirst {
    margin-top: 20px;
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--muted);
}

.post-head-date {
    display: block;
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--rule);
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.04em;
    color: var(--muted);
}

.post-nav {
    max-width: var(--measure);
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
    font-size: 0.9375rem;
    color: var(--muted);
}

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

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9em;
}

/* ---------- generic section (sub-pages) ---------- */

.section + .section {
    margin-top: 80px;
}

.section:last-of-type {
    margin-bottom: 96px;
}

.section-title {
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--text);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.section-text {
    max-width: var(--measure);
    font-size: 1.125rem;
}

/* ---------- sessions table ---------- */

.table-scroll {
    overflow-x: auto;
}

.sessions {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-variant-numeric: tabular-nums;
}

.sessions th {
    padding-bottom: 12px;
    border-bottom: 1px solid var(--rule);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    white-space: nowrap;
}

.sessions td {
    padding-block: 18px;
    border-bottom: 1px solid var(--rule);
    font-size: 1rem;
    vertical-align: baseline;
}

.sessions th + th,
.sessions td + td {
    padding-left: 32px;
}

.col-num {
    width: 3rem;
    color: var(--muted);
}

.col-time {
    white-space: nowrap;
}

.table-note {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--muted);
}

/* ---------- button ---------- */

.cta {
    margin-top: 32px;
}

.button {
    display: inline-block;
    padding: 15px 28px;
    background: var(--text);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.button:hover {
    background: var(--muted);
}

/* ---------- mobile ---------- */

@media (max-width: 640px) {
    /* brand and language switch on the first row, links on the second */
    .nav {
        flex-wrap: wrap;
        height: auto;
        min-height: var(--nav-height);
        padding-block: 16px;
        gap: 12px 24px;
    }
    .lang-switch { order: 1; }
    .nav-links { order: 2; width: 100%; }
    .hero { padding-block: 96px 72px; }
    .essay section + section { margin-top: 56px; }
    .essay p { font-size: 1.0625rem; }
    .essay ul { font-size: 1.0625rem; }
    .footer { margin-top: 80px; }
    .page-head { padding-block: 80px 48px; }
    .post-head { padding-block: 80px 40px; }
    .post-list { margin-bottom: 64px; }
    .post-link { grid-template-columns: 1fr; gap: 12px; padding-block: 24px; }
    .post-meta { flex-direction: row; gap: 16px; padding-top: 0; }
    .section + .section { margin-top: 56px; }
    .section-text { font-size: 1.0625rem; }
    .sessions th + th,
    .sessions td + td { padding-left: 20px; }
}