:root {
  --page: #f3f7fc;
  --surface: #ffffff;
  --surface-soft: #f7faff;
  --surface-blue: #e9f1ff;
  --ink: #0b1f3a;
  --text: #33445f;
  --muted: #6b7c98;
  --line: #d9e4f2;
  --line-strong: #c3d4e8;
  --blue: #1d4ed8;
  --blue-strong: #173ea8;
  --blue-soft: #dbe8ff;
  --navy: #0a2540;
  --navy-2: #0d3157;
  --cyan: #0e7490;
  --green: #0f766e;
  --amber: #b45309;
  --red: #b42318;
  --radius: 10px;
  --radius-sm: 7px;
  --side-width: 264px;
  --measure: 760px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #071527;
  --surface: #0d2038;
  --surface-soft: #102741;
  --surface-blue: #122f54;
  --ink: #eef5ff;
  --text: #b9c9df;
  --muted: #8ea3bf;
  --line: #1d3958;
  --line-strong: #2a4c72;
  --blue: #6ea2ff;
  --blue-strong: #8db8ff;
  --blue-soft: #143258;
  --navy: #061426;
  --navy-2: #0a2039;
  --cyan: #67d3e8;
  --green: #6ee7d2;
  --amber: #f3b562;
  --red: #fda29b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--page);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-strong); }
img { max-width: 100%; height: auto; }
button { font: inherit; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--blue) 35%, transparent); outline-offset: 2px; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 200; padding: 10px 16px; background: var(--blue); color: #fff; }
.skip-link:focus { left: 12px; top: 12px; border-radius: var(--radius-sm); }

/* Shell */
.app-shell { display: grid; grid-template-columns: var(--side-width) minmax(0, 1fr); min-height: 100vh; }
.app-main { min-width: 0; display: flex; flex-direction: column; }
.shell { width: min(1120px, calc(100% - 56px)); margin: 0 auto; }
.content-wrap { padding: 28px 0 56px; }

/* Sidebar */
.sidebar {
  position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column;
  padding: 24px 18px 18px; color: #dbe8fa;
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 40;
}
.side-brand { display: flex; align-items: center; gap: 10px; color: #fff; padding: 0 8px 22px; }
.side-brand img { width: 38px; height: 30px; flex: 0 0 auto; }
.side-brand strong { display: block; font-size: 16px; letter-spacing: .01em; }
.side-brand span { display: block; color: #91aed4; font-size: 11px; letter-spacing: .08em; }
.side-nav { display: grid; gap: 3px; }
.nav-label { margin: 18px 10px 6px; color: #6f8db5; font-size: 10px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.nav-item {
  display: flex; align-items: center; gap: 10px; min-height: 40px; padding: 8px 10px;
  border-radius: var(--radius-sm); color: #c5d7ef; font-size: 14px; font-weight: 600;
  border: 1px solid transparent;
}
.nav-item:hover { color: #fff; background: rgba(255, 255, 255, .07); }
.nav-item.active { color: #fff; background: var(--blue); border-color: color-mix(in srgb, var(--blue) 60%, #fff); }
.nav-item .dot { width: 6px; height: 6px; border-radius: 50%; background: #7aa7e6; }
.nav-item.active .dot { background: #fff; }
.side-card {
  margin-top: auto; padding: 14px; border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, .12); background: rgba(255, 255, 255, .05);
  font-size: 12px; color: #b8cce7;
}
.side-card strong { display: block; color: #fff; font-size: 13px; margin-bottom: 4px; }
.side-card a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.side-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 14px; padding: 0 4px; }
.side-foot a, .side-foot button {
  color: #a9c1e0; background: none; border: 0; padding: 6px 0; font-size: 12px; cursor: pointer;
}
.side-foot a:hover, .side-foot button:hover { color: #fff; }

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 14px;
  min-height: 66px; padding: 10px 0; background: color-mix(in srgb, var(--page) 92%, transparent);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(12px);
}
.topbar .shell { display: flex; align-items: center; gap: 14px; width: min(1120px, calc(100% - 56px)); }
.crumbs { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--ink); }
.crumbs span { margin: 0 6px; color: var(--line-strong); }
.quick-search { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.quick-search input {
  width: min(260px, 26vw); min-height: 38px; padding: 8px 12px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--ink); background: var(--surface);
  font-size: 13px;
}
.user-chip {
  display: inline-flex; align-items: center; gap: 7px; min-height: 36px; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px; color: var(--text); background: var(--surface);
  font-size: 12px; font-weight: 600; max-width: 190px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.user-chip:hover { border-color: var(--blue); color: var(--blue); }
.menu-button { display: none; min-height: 38px; min-width: 38px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); cursor: pointer; }

/* Base components */
.eyebrow { margin: 0 0 8px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.muted { color: var(--muted); }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 42px; padding: 9px 18px; border: 1px solid var(--blue);
  border-radius: var(--radius-sm); color: #fff; background: var(--blue);
  font-size: 14px; font-weight: 700; cursor: pointer;
}
.button:hover { background: var(--blue-strong); border-color: var(--blue-strong); color: #fff; }
.button-secondary { color: var(--ink); background: var(--surface); border-color: var(--line-strong); }
.button-secondary:hover { color: var(--blue); border-color: var(--blue); background: var(--surface); }
.button-sm { min-height: 34px; padding: 6px 12px; font-size: 12px; border-radius: 6px; }
.panel, .card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 3px 9px;
  border-radius: 999px; font-size: 11px; font-weight: 700; white-space: nowrap;
}
.badge-public { color: var(--blue); background: var(--blue-soft); }
.badge-subscriber { color: var(--amber); background: color-mix(in srgb, var(--amber) 12%, var(--surface)); }
.badge-transcript { color: var(--green); background: color-mix(in srgb, var(--green) 11%, var(--surface)); }
.badge-muted { color: var(--muted); background: var(--surface-soft); }
.notice, .error { padding: 12px 14px; border: 1px solid; border-radius: var(--radius-sm); font-size: 13px; line-height: 1.7; }
.notice { color: var(--amber); background: color-mix(in srgb, var(--amber) 7%, var(--surface)); border-color: color-mix(in srgb, var(--amber) 25%, var(--line)); }
.error { color: var(--red); background: color-mix(in srgb, var(--red) 7%, var(--surface)); border-color: color-mix(in srgb, var(--red) 25%, var(--line)); }
.messages { padding-top: 16px; display: grid; gap: 8px; }
.empty-state { padding: 40px 20px; border: 1px dashed var(--line-strong); border-radius: var(--radius); color: var(--muted); background: var(--surface); text-align: center; }

/* Typography blocks */
.hero-panel {
  display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr); gap: 32px;
  padding: 44px 40px; margin-bottom: 24px; border-radius: var(--radius);
  color: #eaf2ff; background:
    radial-gradient(circle at 88% 18%, rgba(94, 165, 255, .35), transparent 34%),
    linear-gradient(120deg, var(--navy) 0%, #123d7a 58%, var(--blue) 100%);
  border: 1px solid color-mix(in srgb, var(--blue) 45%, #fff);
}
.hero-panel .eyebrow { color: #9fc4ff; }
.hero-panel h1 { margin: 0 0 14px; color: #fff; font-size: clamp(30px, 4vw, 46px); line-height: 1.16; letter-spacing: -.035em; }
.hero-panel p { margin: 0; max-width: 640px; color: #cfe0f8; font-size: 16px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-panel .button { background: #fff; color: var(--navy); border-color: #fff; }
.hero-panel .button:hover { background: #eaf2ff; border-color: #eaf2ff; color: var(--navy); }
.hero-panel .button-secondary { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .5); }
.hero-panel .button-secondary:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.hero-aside { display: grid; align-content: center; gap: 10px; padding: 22px; border: 1px solid rgba(255, 255, 255, .18); border-radius: var(--radius); background: rgba(4, 22, 44, .28); }
.hero-aside strong { color: #fff; font-size: 34px; line-height: 1.1; }
.hero-aside span { color: #b9d2f1; font-size: 12px; }
.hero-aside hr { width: 100%; border: 0; border-top: 1px solid rgba(255, 255, 255, .16); margin: 6px 0; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 30px; }
.stat-row div { padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.stat-row strong { display: block; color: var(--ink); font-size: 21px; letter-spacing: -.02em; }
.stat-row span { color: var(--muted); font-size: 11px; }

.section { margin: 30px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 14px; }
.section-head h2 { margin: 0; color: var(--ink); font-size: 22px; letter-spacing: -.02em; }
.section-head p { margin: 0; color: var(--muted); font-size: 13px; }
.section-head a { font-size: 13px; }

.author-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.author-card { padding: 20px; }
.author-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.avatar { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: #fff; background: var(--blue); font-weight: 800; font-size: 17px; }
.author-card h3 { margin: 0; color: var(--ink); font-size: 18px; }
.author-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.author-meta { display: flex; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 12px; margin: 10px 0 14px; }

/* Lists */
.doc-list { display: grid; gap: 8px; }
.doc-row {
  display: grid; grid-template-columns: 76px minmax(0, 1fr) auto; align-items: center; gap: 14px;
  padding: 13px 16px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--text);
}
.doc-row:hover { border-color: var(--blue); background: var(--surface-soft); }
.doc-date { color: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.doc-main { min-width: 0; }
.doc-title { display: block; color: var(--ink); font-size: 14px; font-weight: 650; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-sub { display: block; color: var(--muted); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-row .badge { justify-self: end; }

/* Filters */
.filter-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 16px 0; }
.filter-bar select, .search-bar input {
  min-height: 38px; padding: 7px 10px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); font-size: 13px;
}
.chip { padding: 6px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: var(--surface); font-size: 12px; }
.chip.active, .chip:hover { color: var(--blue); border-color: var(--blue); background: var(--blue-soft); }
.search-bar { display: flex; gap: 8px; margin: 16px 0; }
.search-bar input { flex: 1; min-height: 44px; font-size: 14px; }

/* Reading */
.reading-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 28px; align-items: start; }
.reading-main { min-width: 0; }
.doc-head { padding-bottom: 18px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.doc-head h1 { margin: 10px 0; color: var(--ink); font-size: clamp(26px, 3.2vw, 36px); line-height: 1.28; letter-spacing: -.03em; }
.doc-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: var(--muted); font-size: 12px; }
.doc-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.doc-body { max-width: var(--measure); font-size: 17px; line-height: 1.92; color: var(--text); }
.doc-body h1, .doc-body h2, .doc-body h3, .doc-body h4 { color: var(--ink); line-height: 1.4; letter-spacing: -.02em; margin: 1.7em 0 .6em; }
.doc-body h1 { font-size: 28px; }
.doc-body h2 { font-size: 23px; }
.doc-body h3 { font-size: 19px; }
.doc-body p { margin: 0 0 .95em; }
.doc-body blockquote { margin: 1.2em 0; padding: 10px 16px; border-left: 3px solid var(--blue); background: var(--surface-soft); color: var(--text); }
.doc-body code { padding: 2px 5px; border-radius: 4px; background: var(--surface-soft); border: 1px solid var(--line); font-size: .86em; }
.doc-body pre { padding: 14px; overflow: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-soft); }
.doc-body img { display: block; margin: 1.4em auto; border: 1px solid var(--line); border-radius: var(--radius); }
.doc-body table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 13px; }
.doc-body th, .doc-body td { padding: 7px 9px; border: 1px solid var(--line); text-align: left; }
.doc-body ul, .doc-body ol { padding-left: 1.4em; }
.doc-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; }
.reading-aside { position: sticky; top: 84px; display: grid; gap: 12px; }
.aside-card { padding: 15px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.aside-card h3 { margin: 0 0 9px; color: var(--ink); font-size: 12px; letter-spacing: .04em; }
.aside-card p { margin: 0 0 5px; color: var(--muted); font-size: 12px; }
.aside-card .button { width: 100%; margin-top: 8px; }
.toc-list { display: grid; gap: 2px; max-height: 45vh; overflow: auto; }
.toc-list a { display: block; padding: 4px 0 4px 8px; border-left: 2px solid transparent; color: var(--muted); font-size: 12px; }
.toc-list a:hover, .toc-list a.active { color: var(--blue); border-left-color: var(--blue); }
.paywall-card { max-width: 640px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.paywall-card h2 { margin: 0 0 8px; color: var(--ink); font-size: 20px; }
.paywall-card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.paywall-actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* Files / forms / account */
.file-list { display: grid; gap: 8px; }
.file-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; padding: 13px 15px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.file-name { color: var(--ink); font-weight: 650; overflow-wrap: anywhere; }
.file-meta { color: var(--muted); font-size: 11px; }
.file-actions { display: flex; align-items: center; gap: 8px; }
.file-note { color: var(--muted); font-size: 12px; margin-top: 8px; }
.form-panel { max-width: 540px; padding: 26px; margin: 24px auto; }
.form-panel h1 { margin: 0 0 6px; color: var(--ink); font-size: 26px; letter-spacing: -.03em; }
.form-panel .lead { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
form .field { display: grid; gap: 6px; margin-bottom: 14px; }
form label { color: var(--ink); font-size: 13px; font-weight: 650; }
form input, form textarea, form select {
  min-height: 42px; width: 100%; padding: 9px 12px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); font-size: 14px;
}
.help-text { color: var(--muted); font-size: 11px; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 8px; }
.inline-form { display: inline; }
.code-input input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .04em; text-transform: uppercase; }
.account-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 16px; align-items: start; }
.subscription-card { padding: 22px; }
.subscription-card h2 { margin: 0 0 6px; color: var(--ink); font-size: 20px; }
.expiry { margin: 12px 0; color: var(--ink); font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.progress { height: 6px; border-radius: 999px; background: var(--surface-soft); border: 1px solid var(--line); overflow: hidden; }
.progress span { display: block; height: 100%; background: var(--blue); }
.section-title { margin: 26px 0 10px; color: var(--ink); font-size: 17px; }
.table { width: 100%; border-collapse: collapse; font-size: 12px; }
.table th, .table td { padding: 8px 6px; border-bottom: 1px solid var(--line); text-align: left; }
.table th { color: var(--muted); font-weight: 700; }
.ops-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 16px 0; }
.ops-stat { padding: 15px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.ops-stat strong { display: block; color: var(--ink); font-size: 23px; }
.ops-stat span { color: var(--muted); font-size: 11px; }

/* Footer */
.site-footer { margin-top: auto; border-top: 1px solid var(--line); padding: 20px 0 26px; color: var(--muted); font-size: 12px; }
.site-footer .shell { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer strong { color: var(--ink); }
.site-footer a { color: var(--muted); margin-right: 12px; }
.site-footer a:hover { color: var(--blue); }

@media (max-width: 1200px) {
  .reading-layout { grid-template-columns: minmax(0, 1fr); }
  .reading-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 960px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; width: min(300px, 86vw);
    transform: translateX(-102%); transition: transform .2s ease; box-shadow: 0 0 40px rgba(2, 15, 35, .35);
  }
  .sidebar.open { transform: translateX(0); }
  .menu-button { display: inline-flex; align-items: center; justify-content: center; }
  .hero-panel { grid-template-columns: 1fr; padding: 30px 22px; }
  .hero-aside { grid-template-columns: repeat(3, 1fr); align-items: center; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .account-grid { grid-template-columns: 1fr; }
  .ops-grid { grid-template-columns: repeat(2, 1fr); }
  .backdrop { position: fixed; inset: 0; z-index: 35; background: rgba(4, 15, 30, .45); }
}
@media (max-width: 720px) {
  .shell, .topbar .shell { width: calc(100% - 28px); }
  .quick-search { display: none; }
  .user-chip { max-width: 120px; }
  .author-grid { grid-template-columns: 1fr; }
  .doc-row { grid-template-columns: 1fr auto; }
  .doc-date { grid-column: 1 / -1; }
  .file-row { grid-template-columns: 1fr; }
  .reading-aside { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .table { display: block; overflow-x: auto; }
  .hero-panel h1 { font-size: 30px; }
  .hero-aside { grid-template-columns: 1fr; }
}
@media (max-width: 390px) {
  .stat-row { grid-template-columns: 1fr; }
  .button { width: 100%; }
  .doc-actions .button, .file-actions .button { width: auto; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print {
  .sidebar, .topbar, .site-footer, .reading-aside, .doc-actions, .doc-nav, .messages { display: none !important; }
  .app-shell { display: block; }
  body { background: #fff; }
}