:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f5;
  --bg-hover: #f1f1ef;
  --text: #191919;
  --muted: #787774;
  --line: #e9e9e7;
  --line-strong: #d9d9d6;
  --link: #2383e2;
  --black: #191919;
  --white: #ffffff;
  --radius: 6px;
  --max: 1080px;
  --font: "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 .45em; line-height: 1.25; letter-spacing: -.02em; font-weight: 600; }
h1 { font-size: 30px; }
h2 { font-size: 20px; }
h3 { font-size: 15px; }
p { margin: 0 0 .9em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.nowrap { white-space: nowrap; }
.empty { color: var(--muted); padding: 24px 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }

/* header — Notion-like */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { height: 52px; display: flex; align-items: center; gap: 14px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  flex-shrink: 0;
}
.brand:hover { text-decoration: none; }
.brand span span { color: var(--muted); }
.brand-mark { width: 22px; height: 22px; border-radius: 4px; }
.nav { display: flex; align-items: center; gap: 2px; margin-left: 6px; }
.nav a {
  color: var(--muted);
  font-size: 13.5px;
  padding: 5px 8px;
  border-radius: 4px;
}
.nav a:hover { color: var(--text); background: var(--bg-hover); text-decoration: none; }
.head-search {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px 2px 2px 9px;
}
.head-search input {
  width: 170px;
  border: 0;
  outline: 0;
  background: transparent;
  font: inherit;
  font-size: 13px;
  color: var(--text);
  padding: 4px 0;
}
.head-search input::placeholder { color: #9b9a97; }
.head-search button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 7px;
  border-radius: 3px;
  cursor: pointer;
}
.head-search button:hover { background: var(--bg-hover); color: var(--text); }
.menu-btn {
  display: none;
  margin-left: auto;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 4px;
  width: 32px;
  height: 32px;
  font-size: 16px;
  cursor: pointer;
}

/* home */
.hero { padding: 42px 0 18px; background: #fff; color: var(--text); }
.hero h1 { font-size: clamp(28px, 4vw, 36px); max-width: 760px; margin-bottom: 10px; }
.hero h1 span { color: var(--text); }
.hero p { color: var(--muted); font-size: 15px; max-width: 620px; margin-bottom: 18px; }
.hero-search {
  display: flex;
  gap: 6px;
  max-width: 640px;
  margin-bottom: 12px;
}
.hero-search input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: #fff;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 8px 11px;
  outline: 0;
}
.hero-search input:focus { border-color: #b8b8b4; box-shadow: 0 0 0 2px rgba(35, 131, 226, .12); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 14px; }
.chips a {
  color: var(--muted);
  background: var(--bg-soft);
  border-radius: 4px;
  font-size: 12.5px;
  padding: 3px 8px;
}
.chips a:hover { color: var(--text); background: var(--bg-hover); text-decoration: none; }
.hero-stats { display: flex; gap: 20px; color: var(--muted); font-size: 13px; }
.hero-stats strong { color: var(--text); font-weight: 600; margin-right: 4px; }

.section { padding: 30px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head h2 { margin: 0; }
.section-head p { color: var(--muted); font-size: 13px; margin: 3px 0 0; }
.eyebrow { display: none; }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 6px 11px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.3;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-mint { background: var(--black); color: #fff; }
.btn-mint:hover { background: #333; }
.btn-ghost { background: #fff; border-color: var(--line-strong); color: var(--text); }
.btn-ghost:hover { background: var(--bg-soft); }
.btn-sm { padding: 4px 8px; font-size: 12px; }
.btn-lg { padding: 9px 15px; font-size: 14px; }

/* exam list — dense, borderless */
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 24px; }
.exam-card {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--text);
  background: transparent;
  border-radius: 0;
}
.exam-card:hover { background: var(--bg-soft); text-decoration: none; }
.exam-card .icon { display: none; }
.exam-card h3 { margin: 0; font-size: 13.5px; font-weight: 500; }
.exam-card p { margin: 0; font-size: 12px; color: var(--muted); white-space: nowrap; }

/* exam page */
.crumbs { padding-top: 14px; font-size: 12px; color: var(--muted); }
.crumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 5px; }
.crumbs li + li::before { content: "/"; color: #c7c7c3; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--text); }
.crumbs span { color: var(--text); }
.exam-head { padding: 24px 0 18px; background: #fff; border-bottom: 1px solid var(--line); }
.exam-head h1 { margin: 6px 0 8px; font-size: 28px; }
.exam-head .lead { color: var(--muted); font-size: 14px; max-width: 780px; margin-bottom: 10px; }
.exam-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.pill { color: var(--muted); background: var(--bg-soft); border-radius: 4px; padding: 3px 8px; font-size: 12px; }
.pill strong { color: var(--text); font-weight: 600; }
.filters { display: flex; flex-wrap: wrap; gap: 6px; align-items: end; padding: 16px 0; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.filters label { display: none; }
.filters select, .filters input {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 6px 8px;
  font: inherit;
  font-size: 13px;
  background: #fff;
  color: var(--text);
  outline: 0;
}
.filters .grow { flex: 1; min-width: 180px; }
.filters .grow input { width: 100%; }
.filters button { border: 0; }
.series-list { display: flex; flex-wrap: wrap; gap: 5px; margin: 0 0 14px; }
.series-list a { color: var(--muted); background: var(--bg-soft); border-radius: 4px; padding: 3px 8px; font-size: 12px; }
.series-list a:hover { color: var(--text); text-decoration: none; }

/* paper table — Notion database */
.paper-table-wrap { background: #fff; border: 0; border-radius: 0; overflow: hidden; }
.paper-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.paper-table th {
  text-align: left;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--muted);
  padding: 7px 8px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.paper-table td { padding: 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.paper-table tr:hover td { background: var(--bg-soft); }
.paper-title { color: var(--text); font-weight: 500; }
.paper-title:hover { color: var(--link); text-decoration: underline; }
.paper-sub { display: flex; flex-wrap: wrap; gap: 6px; font-size: 11.5px; color: var(--muted); margin-top: 1px; }
.paper-sub span + span::before { content: "·"; margin-right: 6px; }

/* paper page */
.paper-main { padding: 22px 0 50px; }
.paper-grid { display: grid; grid-template-columns: minmax(0, 1fr) 270px; gap: 42px; align-items: start; }
.paper-card { background: transparent; border: 0; border-radius: 0; padding: 0; }
.paper-card h1 { margin: 8px 0 8px; font-size: 28px; }
.paper-badges { display: flex; flex-wrap: wrap; gap: 5px; }
.badge { display: inline-block; background: var(--bg-soft); color: var(--muted); border-radius: 3px; padding: 2px 6px; font-size: 11px; font-weight: 500; }
.badge.grey { background: var(--bg-soft); color: var(--muted); }
.paper-actions { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 10px; }
.paper-info { color: var(--muted); font-size: 13px; }
.paper-info strong { color: var(--text); font-weight: 500; }
.preview { border: 1px solid var(--line); border-radius: 4px; overflow: hidden; background: var(--bg-soft); margin: 16px 0; }
.preview img { width: 100%; max-height: 520px; object-fit: contain; }
.preview .no-thumb { display: grid; place-items: center; min-height: 240px; color: var(--muted); font-size: 13px; }
.aside-card { background: transparent; border: 0; border-top: 1px solid var(--line); border-radius: 0; padding: 14px 0 0; }
.aside-card h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 500; margin-bottom: 8px; }
.aside-card ul { list-style: none; padding: 0; margin: 0; }
.aside-card li { margin: 0; padding: 5px 0; border-bottom: 1px solid var(--line); font-size: 12.5px; line-height: 1.35; }
.aside-card li a { color: var(--text); }
.aside-card li a:hover { color: var(--link); }
.aside-card li span { display: block; color: var(--muted); font-size: 11px; margin-top: 1px; }
.faqs { margin-top: 24px; }
.faqs h2 { font-size: 16px; margin-bottom: 8px; }
.faqs details { border-bottom: 1px solid var(--line); padding: 8px 0; }
.faqs summary { cursor: pointer; font-size: 13.5px; font-weight: 500; }
.faqs p { margin: 6px 0 0; color: var(--muted); font-size: 13px; }

/* search */
.search-head { padding: 36px 0 20px; background: #fff; border-bottom: 1px solid var(--line); }
.search-head h1 { color: var(--text); font-size: 28px; }
.search-head p { color: var(--muted); font-size: 14px; }
.search-form { display: flex; gap: 6px; max-width: 620px; margin-top: 12px; }
.search-form input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  padding: 8px 10px;
  font: inherit;
  font-size: 14px;
  outline: 0;
}
.search-form input:focus { border-color: #b8b8b4; box-shadow: 0 0 0 2px rgba(35, 131, 226, .12); }
.search-results { padding: 20px 0 50px; }
.search-results h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 500; margin: 18px 0 4px; }
.result { display: flex; align-items: center; gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line); background: transparent; border-radius: 0; margin: 0; }
.result .grow { flex: 1; min-width: 0; }
.result h3 { margin: 0 0 1px; font-size: 13.5px; font-weight: 500; }
.result h3 a { color: var(--text); }
.result h3 a:hover { color: var(--link); }
.result p { margin: 0; color: var(--muted); font-size: 12px; }
.result .meta { font-size: 10.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

/* ads */
.ad { margin: 22px 0; min-height: 90px; display: flex; flex-direction: column; align-items: center; justify-content: center; background: var(--bg-soft); border: 0; border-radius: 4px; overflow: hidden; }
.ad::before { content: "Advertisement"; font-size: 9px; letter-spacing: .1em; text-transform: uppercase; color: #b3b3af; padding: 3px; }
.ad ins { width: 100%; }

/* footer */
.footer { border-top: 1px solid var(--line); background: #fff; margin-top: 20px; }
.footer-inner { padding: 22px 24px 30px; display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; justify-content: space-between; }
.footer-brand { color: var(--text); font-weight: 600; font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-links a { color: var(--muted); font-size: 12px; }
.footer-links a:hover { color: var(--text); }
.footer .muted { color: var(--muted); font-size: 11.5px; }

/* prose/legal */
.prose { background: transparent; border: 0; border-radius: 0; padding: 0; max-width: 760px; }
.prose h1 { font-size: 28px; }
.prose h2 { margin-top: 1.4em; font-size: 18px; }
.prose p, .prose li { color: #37352f; font-size: 14.5px; }
.prose a { color: var(--link); }

/* admin — same minimal language */
.admin { background: #fff; }
.admin-shell { display: grid; grid-template-columns: 210px minmax(0, 1fr); min-height: 100vh; }
.admin-side { background: #fbfbfa; border-right: 1px solid var(--line); padding: 18px 10px; }
.admin-side a { display: block; color: var(--muted); padding: 5px 8px; border-radius: 4px; font-size: 13px; }
.admin-side a:hover, .admin-side a.active { background: var(--bg-hover); color: var(--text); text-decoration: none; }
.admin-brand { font-weight: 600; font-size: 13px; color: var(--text); margin: 0 0 14px; padding: 0 8px; }
.admin-main { padding: 28px 30px; }
.admin-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.admin-card { background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 16px; margin-bottom: 14px; }
.admin-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 16px; }
.admin-stats div { background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 12px; }
.admin-stats strong { display: block; font-size: 20px; font-weight: 600; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.admin-table th, .admin-table td { text-align: left; padding: 7px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
.admin-table th { font-size: 11px; color: var(--muted); font-weight: 500; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.form-grid .full { grid-column: 1 / -1; }
label.field { display: block; font-size: 12px; font-weight: 500; color: var(--muted); }
label.field input, label.field select, label.field textarea {
  width: 100%;
  margin-top: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 7px 8px;
  font: inherit;
  font-size: 13px;
  background: #fff;
  color: var(--text);
  outline: 0;
}
label.field textarea { min-height: 70px; }
.actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.flash { background: var(--bg-soft); border: 1px solid var(--line); color: var(--text); border-radius: 4px; padding: 8px 10px; font-size: 12.5px; margin-bottom: 12px; }
.danger { color: #c0392b; }

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .paper-grid { grid-template-columns: 1fr; gap: 24px; }
  .admin-shell { grid-template-columns: 1fr; }
  .admin-side { display: flex; flex-wrap: wrap; gap: 2px; border-right: 0; border-bottom: 1px solid var(--line); }
  .admin-brand { width: 100%; margin-bottom: 6px; }
  .admin-stats { grid-template-columns: repeat(2, 1fr); }
  .admin-main { padding: 18px; }
}
@media (max-width: 700px) {
  .wrap { padding: 0 16px; }
  .header-inner { height: 50px; }
  .nav { display: none; position: absolute; top: 50px; left: 0; right: 0; background: #fff; padding: 6px 16px 10px; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); box-shadow: 0 8px 20px rgba(0,0,0,.06); }
  .nav.open { display: flex; }
  .nav a { padding: 8px 8px; }
  .head-search { display: none; }
  .menu-btn { display: block; }
  .brand span span { color: var(--muted); }
  .hero { padding: 28px 0 12px; }
  .hero-search { flex-direction: column; }
  .hero-search .btn { width: 100%; padding: 8px; }
  .grid { grid-template-columns: 1fr; }
  .section { padding: 24px 0; }
  .section-head { display: block; }
  .paper-table th:nth-child(2), .paper-table td:nth-child(2), .paper-table th:nth-child(3), .paper-table td:nth-child(3) { display: none; }
  .hide-sm { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .result { flex-direction: column; align-items: flex-start; gap: 6px; }
  .result .btn { width: 100%; }
  .footer-inner { display: block; }
  .footer-links { margin-top: 10px; }
  .paper-card h1, .exam-head h1, .search-head h1 { font-size: 24px; }
}