/* ExamSiri: one small stylesheet, mobile first. Colours follow the Exams Hub app (primary #205D8D). */
:root {
  --primary: #205d8d; --primary-dark: #143b59; --primary-soft: #e8f0f7;
  --bg: #f4f6f9; --surface: #fff; --text: #1d2733; --muted: #5d6b7a; --line: #e1e6ec;
  --pdf: #c62828; --pdf-soft: #fdecec; --radius: 12px; --shadow: 0 1px 2px rgba(16, 32, 48, .06), 0 2px 8px rgba(16, 32, 48, .05);
  color-scheme: light;
}
:root.dark {
  --primary: #6fa8d6; --primary-dark: #0f2b42; --primary-soft: #1d3346;
  --bg: #0f151c; --surface: #18212b; --text: #e6ebf0; --muted: #98a6b5; --line: #2a3644;
  --pdf: #ef7d7d; --pdf-soft: #3a2224; --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", Arial, sans-serif; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: .2rem 0 .3rem; }
h2 { font-size: 1.15rem; }
.wrap { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.ic { width: 20px; height: 20px; flex: 0 0 auto; }
[hidden] { display: none !important; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: var(--primary-dark); color: #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, .2); }
.bar { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; font-size: 1.3rem; letter-spacing: .2px; }
.brand:hover { text-decoration: none; }
.brand img { display: block; }
.brand b { color: #ffc857; font-weight: 700; }
.bar-actions { display: flex; gap: 4px; }
.icon-btn { display: inline-grid; place-items: center; width: 40px; height: 40px; border: 0; border-radius: 50%; background: transparent; color: #fff; cursor: pointer; }
.icon-btn:hover, .icon-btn:focus-visible { background: rgba(255, 255, 255, .12); }
.menu { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 10px; scrollbar-width: none; }
.menu::-webkit-scrollbar { display: none; }
.menu a { flex: 0 0 auto; color: #dce8f3; padding: 5px 12px; border-radius: 999px; background: rgba(255, 255, 255, .08); font-size: .92rem; }
.menu a:hover { background: rgba(255, 255, 255, .18); text-decoration: none; color: #fff; }

/* search */
.search-panel { background: var(--surface); color: var(--text); border-bottom: 1px solid var(--line); padding: 12px 0; }
.search-box, .filter { display: flex; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 0 14px; color: var(--muted); }
.search-box:focus-within, .filter:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search-box input, .filter input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: inherit; padding: 11px 0; }
.search-results { max-height: 60vh; overflow: auto; margin-top: 8px; }
.search-results a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--text); }
.search-results a:hover, .search-results a.active { background: var(--primary-soft); text-decoration: none; }
.search-results small { display: block; color: var(--muted); }
.search-results p { color: var(--muted); padding: 8px 12px; margin: 0; }

/* page */
.page { padding-top: 16px; padding-bottom: 32px; min-height: 60vh; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; font-size: .88rem; color: var(--muted); margin-bottom: 8px; }
.crumbs .sep { width: 14px; height: 14px; opacity: .6; }
.lead { color: var(--muted); margin: 0 0 16px; }
.empty { color: var(--muted); text-align: center; padding: 24px 0; }

.hero { text-align: center; padding: 20px 4px 24px; }
.hero h1 { font-size: 1.8rem; }
.hero p { color: var(--muted); max-width: 640px; margin: 8px auto 18px; }
.hero-search { display: inline-flex; align-items: center; gap: 10px; width: 100%; max-width: 560px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--muted); font: inherit; padding: 12px 18px; cursor: text; box-shadow: var(--shadow); }

/* cards, tiles and rows (the hub app's home and folder screens) */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 14px; overflow: hidden; }
.card-head, .group-head { display: flex; align-items: center; gap: 12px; padding: 12px 14px; color: var(--text); }
.card-head:hover { text-decoration: none; background: var(--primary-soft); }
.card-title, .row-title { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.card-title span { font-weight: 650; font-size: 1.05rem; }
.card-title small, .row-title small, .tile small, .group-head small { color: var(--muted); font-size: .82rem; }
.card-subtitle { margin: 0; padding: 12px 14px 4px; font-size: 1rem; }
.badge { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; background: var(--primary-soft); color: var(--primary); flex: 0 0 auto; }
.badge.pdf { background: var(--pdf-soft); color: var(--pdf); }
.badge .ic { width: 22px; height: 22px; }
.chev { color: var(--muted); width: 18px; height: 18px; }
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; padding: 0 14px 14px; }
.tile { display: flex; flex-direction: column; justify-content: center; min-height: 64px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--text); background: var(--bg); }
.tile span { font-weight: 600; line-height: 1.3; }
.tile:hover { border-color: var(--primary); text-decoration: none; background: var(--primary-soft); }
.rows { list-style: none; margin: 0; padding: 0; }
.rows li + li { border-top: 1px solid var(--line); }
.row { display: flex; align-items: center; gap: 12px; padding: 10px 14px; color: var(--text); }
.row:hover { background: var(--primary-soft); text-decoration: none; }
.row-title span { line-height: 1.35; overflow-wrap: anywhere; }

/* exam page: groups that open and close */
.filter { margin-bottom: 14px; }
.group-head { cursor: pointer; list-style: none; font-weight: 650; }
.group-head::-webkit-details-marker { display: none; }
.group-head span { flex: 1; }
.group-head .chev { transform: rotate(90deg); transition: transform .15s; }
.group:not([open]) .group-head .chev { transform: none; }
.group[open] .group-head { border-bottom: 1px solid var(--line); }

/* paper page */
.paper-title { font-size: 1.35rem; }
.viewer { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; height: 78vh; min-height: 420px; }
.viewer iframe { width: 100%; height: 100%; border: 0; display: block; }
.viewer:fullscreen { border-radius: 0; height: 100%; }
.actions { display: flex; gap: 8px; margin: 12px 0 18px; }
.btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 999px; padding: 8px 16px; font: inherit; font-size: .95rem; cursor: pointer; }
.btn:hover { border-color: var(--primary); text-decoration: none; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
:root.dark .btn.primary { color: #0f151c; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }
.pager-link { display: flex; flex-direction: column; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--text); min-width: 0; }
.pager-link small { color: var(--muted); }
.pager-link span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pager-link.next { text-align: right; grid-column: 2; }
.pager-link:hover { border-color: var(--primary); text-decoration: none; }

/* text pages */
.prose { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; max-width: 820px; }
.prose h2 { margin-top: 1.6rem; }
.prose code { overflow-wrap: anywhere; background: var(--bg); padding: 2px 6px; border-radius: 6px; }
.contact-mail { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.notice { text-align: center; padding: 40px 8px; }
.stack { text-align: left; overflow: auto; background: var(--surface); padding: 12px; border-radius: 8px; font-size: .8rem; }

/* footer */
.foot { background: var(--primary-dark); color: #c9d7e4; padding: 28px 0 0; margin-top: 24px; }
.foot a { color: #e3edf6; }
.foot-grid { display: grid; gap: 20px; grid-template-columns: 1fr; }
.foot h2 { font-size: .95rem; color: #fff; margin: 0 0 8px; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot ul.two-col { columns: 2; }
.foot li { margin-bottom: 4px; }
.foot p { margin: 8px 0 0; font-size: .92rem; }
.foot-bottom { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 20px; padding: 14px 16px; font-size: .85rem; }

@media (min-width: 760px) {
  h1 { font-size: 1.9rem; }
  .hero { padding: 36px 0 32px; }
  .hero h1 { font-size: 2.3rem; }
  .tiles { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .foot-grid { grid-template-columns: 1.4fr 1.6fr 1fr; }
}