/* Archive layout. Tokens live in tokens.css — add no raw hexes here. */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
}

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

.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* ── top bar ─────────────────────────────────────────────────────────────── */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner {
    max-width: 1140px; margin: 0 auto; padding: 0 20px;
    height: 46px; display: flex; align-items: stretch; gap: .15rem;
}
.brand {
    display: flex; align-items: center; font-weight: 700; font-size: .95rem;
    color: var(--text-main); padding-right: 1rem; white-space: nowrap;
}
.site-nav {
    display: flex; align-items: stretch; gap: .15rem; flex: 1; min-width: 0;
    overflow-x: auto; scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
    display: flex; align-items: center; color: var(--text-muted);
    font-size: .85rem; font-weight: 500; padding: 0 .8rem; white-space: nowrap;
    border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--text-main); border-bottom-color: var(--border); }
.site-nav .count {
    margin-left: .4rem; font-size: .72rem; color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.nav-right {
    display: flex; align-items: center; gap: .9rem; margin-left: auto;
    padding-left: .8rem; font-size: .8rem; white-space: nowrap;
}
/* Same octicon and solid button as the classic view. A bare "GitHub ↗" text
   link read as an afterthought next to it, and the repo is the point of the
   site — the two views should not disagree about how prominent it is. */
.github-link {
    display: inline-flex; align-items: center; gap: .4rem;
    padding: .3rem .7rem; border-radius: var(--radius-sm);
    background: var(--text-main); color: var(--primary-fg);
    font-size: .82rem; font-weight: 500;
    transition: background-color .2s;
}
.github-link:hover { background: var(--text-strong); color: var(--primary-fg); }

/* ── page head ───────────────────────────────────────────────────────────── */
header.page { padding: 2rem 0 1.25rem; }
header.page h1 { font-size: 2.1rem; font-weight: 700; letter-spacing: -0.035em; }
header.page .subtitle {
    font-size: 1.02rem; color: var(--text-muted); max-width: 52rem;
    margin-top: .35rem;
}

/* ── search ──────────────────────────────────────────────────────────────── */
.filter-bar {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-md); padding: 1rem 1.2rem;
    box-shadow: var(--shadow-sm); margin: 1.25rem 0 1.75rem;
}
.search { position: relative; }
.search input {
    width: 100%; padding: .55rem .8rem .55rem 2rem;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-sm); font-family: inherit; font-size: .9rem;
    color: var(--text-main);
}
.search input:focus { outline: none; border-color: var(--primary); }
.search-ic {
    position: absolute; left: .6rem; top: 50%; transform: translateY(-50%);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: .8rem; color: var(--text-muted);
    border: 1px solid var(--border); border-radius: 4px; padding: 0 .3rem;
}

/* ── pillar block ────────────────────────────────────────────────────────── */
.pillar {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
    padding: 1.4rem 1.5rem; margin-bottom: 1.5rem;
}
.pillar-head {
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 1rem; border-bottom: 1px solid var(--border);
    padding-bottom: .8rem; margin-bottom: .4rem;
}
.pillar-head h2 { font-size: 1.3rem; font-weight: 700; }
.pillar-desc { font-size: .85rem; color: var(--text-muted); margin-top: .15rem; }
.stats {
    font-size: .78rem; color: var(--text-muted); white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.stats b { color: var(--text-main); font-weight: 600; }

/* ── sheet rows ──────────────────────────────────────────────────────────── */
.sheet-list { list-style: none; }
.sheet-row {
    display: flex; align-items: center; gap: 1rem;
    padding: .7rem 0; border-bottom: 1px solid var(--border);
}
.sheet-row:last-child { border-bottom: none; }
/* Inter with tabular figures, not a monospace stack. The numbers only need to
   line up, and the coding fonts that ui-monospace resolves to draw a slashed
   or dotted zero — a programmer's disambiguation mark that means nothing on a
   worksheet index. tabular-nums gives the alignment without it. */
.sheet-num {
    font-variant-numeric: tabular-nums;
    font-size: .78rem; color: var(--text-muted); width: 1.8rem; flex-shrink: 0;
}
.sheet-body { flex: 1; min-width: 0; }
.sheet-name { display: block; font-size: .95rem; font-weight: 500; }

/* The day's new tools. These replaced exam-source labels deliberately: a tag
   saying "TMUA P1" tells a reader nothing they cannot get from the pillar, but
   a tag naming the tool the sheet introduces is the reason to open it. */
.tools { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .3rem; }
.tool {
    font-size: .72rem; color: var(--text-muted);
    background: var(--secondary); border: 1px solid var(--border);
    border-radius: 999px; padding: .1rem .55rem; white-space: nowrap;
}
.qcount {
    font-size: .78rem; color: var(--text-muted); white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.links { display: flex; gap: .5rem; flex-shrink: 0; }
.pdf-link {
    display: inline-block; padding: .25rem .75rem; background: var(--bg);
    color: var(--primary); font-size: .82rem; font-weight: 600;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    transition: background-color .15s, color .15s, border-color .15s;
}
.pdf-link:hover {
    background: var(--primary); color: var(--primary-fg);
    border-color: var(--primary);
}
.pdf-link.ans { color: var(--danger); }
.pdf-link.ans:hover {
    background: var(--danger); color: var(--primary-fg); border-color: var(--danger);
}

.coming-soon {
    background: var(--bg); padding: 1rem; text-align: center;
    border-radius: var(--radius-sm); font-size: .88rem; color: var(--text-muted);
    margin-top: .8rem;
}
.no-match {
    padding: 1.5rem; text-align: center; color: var(--text-muted);
    font-size: .9rem;
}

footer {
    text-align: center; padding: 1.5rem 0 2.5rem;
    color: var(--text-muted); font-size: .82rem;
}

@media (max-width: 720px) {
    header.page h1 { font-size: 1.7rem; }
    .pillar { padding: 1.1rem; }
    .sheet-row { flex-wrap: wrap; gap: .5rem 1rem; }
    .qcount { order: 3; }
    .links { order: 4; margin-left: auto; }
}