/* ===== Spec site styles — Swiss/Sky-blue, inspired by the theme itself ===== */

:root {
  --ink: #0f172a;
  --ink-2: #1e293b;
  --ink-3: #334155;
  --mute: #64748b;
  --line: #e2e8f0;
  --line-2: #cbd5e1;
  --bg: #ffffff;
  --bg-2: #f8fafc;
  --bg-3: #f1f5f9;
  --sky-50: #f0f9ff;
  --sky-100: #e0f2fe;
  --sky-300: #7dd3fc;
  --sky-500: #0ea5e9;
  --sky-600: #0284c7;
  --sky-700: #0369a1;
  --sky-800: #075985;
  --amber: #f59e0b;
  --green: #16a34a;
  --red: #dc2626;
  --indigo: #4f46e5;

  --font-sans: "Inter", "Nunito Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", system-ui, sans-serif;
  --font-serif: "Source Serif 4", "Noto Serif JP", Georgia, serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;

  --sidebar-w: 280px;
  --toc-w: 220px;
  --content-max: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink-2);
  background: var(--bg);
  font-feature-settings: "palt", "kern";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
  font-size: 15px;
}

body.font-serif { font-family: var(--font-serif); }
body.font-mono { font-family: var(--font-mono); font-size: 14px; }

a { color: var(--sky-700); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-3);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--ink);
}

/* ================= Layout ================= */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--toc-w);
  min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--line);
  background: var(--bg-2);
  overflow-y: auto;
  padding: 24px 20px 40px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 18px;
}
.brand-mark {
  width: 10px; height: 28px;
  background: var(--sky-600);
  flex-shrink: 0;
  transform: translateY(6px);
}
.brand-title {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.1;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--mute);
  margin-top: 2px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-section {
  margin-bottom: 10px;
}
.nav-heading {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--sky-800);
  text-transform: uppercase;
  padding: 10px 8px 6px;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-heading .chev {
  transition: transform 0.15s ease;
  color: var(--mute);
  font-size: 10px;
}
.nav-section.collapsed .chev { transform: rotate(-90deg); }
.nav-section.collapsed .nav-list { display: none; }

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0 0 6px 0;
  border-left: 1px solid var(--line);
  margin-left: 8px;
}
.nav-list a {
  display: block;
  padding: 4px 12px;
  color: var(--ink-3);
  font-size: 13px;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.15s, border-color 0.15s;
}
.nav-list a:hover {
  color: var(--sky-700);
  text-decoration: none;
}
.nav-list a.active {
  color: var(--sky-700);
  border-left-color: var(--sky-600);
  font-weight: 600;
}

/* ---- Main content ---- */
main {
  padding: 48px 56px 120px;
  max-width: calc(var(--content-max) + 112px);
  width: 100%;
}

section.doc-section {
  padding-top: 48px;
  scroll-margin-top: 20px;
}
section.doc-section:first-child { padding-top: 0; }

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0;
}
h1 { font-size: 40px; margin-bottom: 8px; }
h2 {
  font-size: 28px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
  display: flex;
  align-items: baseline;
  gap: 12px;
}
h2 .num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--sky-700);
  font-weight: 700;
  letter-spacing: 0.05em;
}
h3 {
  font-size: 20px;
  margin: 28px 0 10px;
  color: var(--ink-2);
}
h4 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--sky-800);
  margin: 20px 0 8px;
}

p { margin: 0 0 12px; }
p .en, .en-label {
  color: var(--mute);
  font-style: italic;
  font-size: 0.92em;
}

.lede {
  font-size: 17px;
  color: var(--ink-3);
  margin: 12px 0 24px;
  max-width: 68ch;
}
.lede .en { display: block; margin-top: 4px; font-size: 14px; }

/* ---- Meta / hero ---- */
.hero {
  padding: 36px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}
.hero-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 18px;
}
.hero-row .dot { color: var(--sky-600); }
.hero-row .tag {
  background: var(--sky-50);
  color: var(--sky-700);
  padding: 4px 10px;
  border: 1px solid var(--sky-300);
  border-radius: 3px;
}
.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--bg-2);
}
.hero-meta .cell {
  display: flex;
  flex-direction: column;
}
.hero-meta .k {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.hero-meta .v {
  font-weight: 700;
  color: var(--ink);
  font-size: 14px;
}

/* ---- Code blocks ---- */
.code-wrap {
  position: relative;
  margin: 14px 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: #0f172a;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #1e293b;
  border-bottom: 1px solid #334155;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #94a3b8;
  letter-spacing: 0.05em;
}
.code-head .lang {
  text-transform: uppercase;
  color: #7dd3fc;
  font-weight: 600;
}
.copy-btn {
  background: transparent;
  border: 1px solid #334155;
  color: #cbd5e1;
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 3px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: all 0.15s;
}
.copy-btn:hover { background: #334155; color: #fff; }
.copy-btn.copied { background: var(--green); color: #fff; border-color: var(--green); }

pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: #e2e8f0;
  background: transparent;
}
pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }

/* Simple token coloring */
.tok-k { color: #f472b6; }   /* keyword */
.tok-s { color: #86efac; }   /* string */
.tok-n { color: #fbbf24; }   /* number */
.tok-c { color: #64748b; font-style: italic; } /* comment */
.tok-t { color: #7dd3fc; }   /* tag / type */
.tok-a { color: #c4b5fd; }   /* attr */
.tok-p { color: #e2e8f0; }   /* punctuation */

/* ---- Prop tables ---- */
.prop-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 18px;
  font-size: 13px;
}
.prop-table th, .prop-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.prop-table th {
  background: var(--bg-3);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink);
  border-bottom: 2px solid var(--ink);
}
.prop-table td code { font-size: 12px; }
.prop-table .req {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 3px;
  margin-left: 4px;
  vertical-align: middle;
  letter-spacing: 0.05em;
}
.prop-table .opt {
  display: inline-block;
  background: var(--bg-3);
  color: var(--mute);
  font-size: 9px;
  font-weight: 600;
  padding: 2px 5px;
  border-radius: 3px;
  margin-left: 4px;
  vertical-align: middle;
  letter-spacing: 0.05em;
}
.prop-table td .type { font-family: var(--font-mono); color: var(--sky-700); font-size: 12px; }
.prop-table td .dflt { font-family: var(--font-mono); color: var(--mute); font-size: 12px; }

/* ---- Preview frame ---- */
.preview {
  border: 1px solid var(--line);
  border-radius: 6px;
  margin: 14px 0 18px;
  overflow: hidden;
}
.preview-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-2);
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.preview-head .label { font-weight: 700; color: var(--sky-800); }
.preview-body {
  padding: 28px;
  background: #fff;
  min-height: 60px;
}
.preview-body.tight { padding: 16px; }
.preview-body.dark { background: var(--ink); color: #e2e8f0; }

/* Tweaks (prop toggles) */
.tweaks {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  padding: 8px 14px;
  background: var(--sky-50);
  border-bottom: 1px solid var(--sky-300);
  font-size: 12px;
}
.tweak {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--sky-800);
  font-family: var(--font-mono);
  font-size: 11px;
}
.tweak select, .tweak input[type="text"] {
  font-family: var(--font-mono);
  font-size: 11px;
  border: 1px solid var(--sky-300);
  background: #fff;
  padding: 3px 6px;
  border-radius: 3px;
  color: var(--ink);
}
.tweak input[type="text"] { width: 110px; }

/* ---- Callouts ---- */
.callout {
  border-left: 4px solid;
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 0 4px 4px 0;
  background: var(--bg-2);
  font-size: 14px;
}
.callout.info { border-color: var(--sky-600); background: var(--sky-50); }
.callout.warn { border-color: var(--amber); background: #fffbeb; }
.callout.tip  { border-color: var(--green); background: #f0fdf4; }
.callout strong { color: var(--ink); }

/* ---- Right TOC ---- */
.toc {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 56px 20px;
  border-left: 1px solid var(--line);
  background: #fff;
}
.toc-title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--sky-800);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.toc ul { list-style: none; padding: 0; margin: 0; border-left: 1px solid var(--line); }
.toc ul a {
  display: block;
  padding: 3px 10px;
  color: var(--mute);
  font-size: 12px;
  border-left: 2px solid transparent;
  margin-left: -1px;
}
.toc ul a:hover { color: var(--sky-700); text-decoration: none; }
.toc ul a.active { color: var(--sky-700); border-left-color: var(--sky-600); }

/* ---- Bib lists / utility ---- */
.kv-list {
  list-style: none;
  padding: 0;
  margin: 8px 0 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.kv-list li {
  display: grid;
  grid-template-columns: 180px 1fr;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.kv-list li:last-child { border-bottom: none; }
.kv-list li:nth-child(odd) { background: var(--bg-2); }
.kv-list .k { font-family: var(--font-mono); color: var(--sky-700); font-size: 12px; }

/* ---- Badge ---- */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 700;
  background: var(--bg-3);
  color: var(--ink-3);
  vertical-align: middle;
  margin-left: 8px;
}
.badge.sky  { background: var(--sky-100); color: var(--sky-800); }
.badge.amb  { background: #fef3c7; color: #92400e; }

/* ---- Footer ---- */
.foot {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--mute);
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* =================================================== */
/* ============ COMPONENT PREVIEW STYLES ============ */
/* These reproduce the theme's look inside previews.   */
/* =================================================== */

/* Citation */
.pv-citation-sup {
  color: var(--sky-600);
  font-weight: 600;
  font-size: 0.75em;
  vertical-align: super;
  cursor: help;
}
.pv-citation-sup:hover { color: var(--sky-800); }

/* SectionTitle */
.pv-section-title {
  display: flex; align-items: center; gap: 16px;
  padding: 8px 0;
}
.pv-section-title .bar {
  width: 12px; height: 40px; border-radius: 2px;
  background: var(--sky-800);
  flex-shrink: 0;
}
.pv-section-title h2 {
  font-size: 36px; font-weight: 800; margin: 0;
  letter-spacing: 0.01em;
  color: #111827;
  border: 0; padding: 0;
  line-height: 1.1;
}

/* SubSectionTitle */
.pv-subsection {
  display: flex; align-items: center; gap: 4px;
  margin: 4px 0;
}
.pv-subsection .chev {
  width: 40px; height: 40px;
  color: var(--sky-700);
  font-size: 40px;
  line-height: 1;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-weight: 300;
}
.pv-subsection h2 {
  font-size: 28px; font-weight: 800; margin: 0;
  color: #111827; border: 0; padding: 0;
  line-height: 1.1;
}

/* AlertBox */
.pv-alert {
  display: flex; align-items: center; gap: 14px;
  border-left: 6px solid;
  padding: 12px 14px;
  border-radius: 0 8px 8px 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  margin: 6px 0;
}
.pv-alert .ico {
  width: 32px; height: 32px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.pv-alert .body { font-size: 17px; font-weight: 700; color: #1e293b; line-height: 1.5; }
.pv-alert.warning { background: #f8fafc; border-color: #475569; }
.pv-alert.warning .ico { color: #ef4444; }
.pv-alert.info    { background: linear-gradient(to right,#f8fafc,#fff); border-color: #4f46e5; }
.pv-alert.info .ico { color: #eab308; }
.pv-alert.success { background: #f0fdf4; border-color: #16a34a; }
.pv-alert.success .ico { color: #16a34a; }
.pv-alert.error   { background: #fef2f2; border-color: #dc2626; }
.pv-alert.error .ico { color: #ef4444; }
.pv-alert.result  { background: linear-gradient(to right,#f8fafc,#fff); border-color: #4f46e5; }
.pv-alert.result .ico { color: #16a34a; }

/* HighlightText */
.pv-hl { font-weight: 700; padding: 0 2px; }
.pv-hl.orange { color: #c2410c; border-bottom: 4px solid #fdba74; }
.pv-hl.indigo { color: #4338ca; text-decoration: underline; text-decoration-color: #a5b4fc; text-decoration-thickness: 4px; text-underline-offset: 6px; }
.pv-hl.red    { color: #b91c1c; border-bottom: 4px solid #fca5a5; }
.pv-hl.green  { color: #15803d; border-bottom: 4px solid #86efac; }

/* TextColorBox */
.pv-colorbox {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  max-width: 480px;
}
.pv-colorbox .title {
  background: rgba(2,132,199,0.3);
  text-align: center;
  font-weight: 800;
  padding: 8px 12px;
  color: #0c4a6e;
  font-size: 16px;
}
.pv-colorbox .text {
  background: #fff;
  padding: 10px 16px;
  line-height: 1.6;
  font-size: 14px;
  color: #1e293b;
}

/* EqRef */
.pv-eqref {
  color: #2563eb;
  font-weight: 500;
  cursor: help;
}

/* Header (simplified replica) */
.pv-header {
  padding: 14px 18px;
  background: #fff;
  border-bottom: 2px solid var(--sky-600);
  position: relative;
}
.pv-header .chapters {
  display: flex; gap: 10px; align-items: stretch; margin-bottom: 8px;
}
.pv-header .chap {
  min-width: 110px; display: flex; flex-direction: column; gap: 6px;
}
.pv-header .chap .t {
  font-size: 12px; font-weight: 700; color: #1e293b; white-space: nowrap;
}
.pv-header .chap .bar {
  display: flex; gap: 2px; height: 4px; width: 100%; border-radius: 2px; overflow: hidden;
}
.pv-header .chap .seg { flex: 1; background: #e2e8f0; border-radius: 2px; }
.pv-header .chap .seg.done { background: #334155; }
.pv-header .chap .seg.cur  { background: var(--sky-500); }
.pv-header .title-row {
  display: flex; justify-content: space-between; align-items: flex-end;
}
.pv-header .big-title {
  font-size: 30px; font-weight: 800; color: #1e293b; line-height: 1.1;
}
.pv-header .counter {
  border: 3px solid #1c1917;
  border-radius: 6px;
  width: 56px; height: 56px;
  display: flex; flex-direction: column;
  flex-shrink: 0;
}
.pv-header .counter .cur {
  flex: 1; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 800; color: #1c1917;
  border-bottom: 2px solid #1c1917;
}
.pv-header .counter .tot {
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; padding: 2px 0; color: #1c1917;
}

/* CitationListPage */
.pv-citlist { font-size: 13px; line-height: 1.7; }
.pv-citlist .item {
  border-left: 2px solid #7dd3fc;
  padding: 4px 10px;
  display: flex; gap: 10px;
  align-items: baseline;
  margin-bottom: 4px;
}
.pv-citlist .item:hover { background: rgba(14,165,233,0.05); border-left-width: 3px; }
.pv-citlist .num { color: var(--sky-700); font-weight: 700; width: 28px; text-align: right; flex-shrink: 0; }
.pv-citlist .text { color: #334155; flex: 1; }
.pv-citlist .text em { font-style: italic; }
.pv-citlist .text .year { font-weight: 600; }
.pv-citlist .doi { color: #2563eb; font-size: 12px; display: block; margin-top: 2px; }

/* MathText preview */
.pv-math {
  font-size: 16px; line-height: 1.6;
  padding: 6px 0;
}
.pv-math .inline-eq {
  font-style: italic;
  color: #0066cc;
  background: #f0f8ff;
  padding: 1px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.95em;
}
.pv-math .block-eq {
  display: block;
  text-align: center;
  margin: 10px 0;
  font-style: italic;
  color: #0066cc;
  background: #f0f8ff;
  padding: 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.pv-math .eq-num {
  float: right;
  color: #374151;
  font-style: normal;
  font-family: var(--font-sans);
}

/* SectionDivider mini */
.pv-divider {
  position: relative;
  background: #fff;
  padding: 40px 36px;
  min-height: 280px;
  overflow: hidden;
}
.pv-divider::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(#0f172a 1px, transparent 1px),
    linear-gradient(to right, #0f172a 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.08;
  pointer-events: none;
}
.pv-divider .corner-tl, .pv-divider .corner-tl2 { position: absolute; background: #0f172a; }
.pv-divider .corner-tl  { top: 0; left: 0; width: 6px; height: 80px; }
.pv-divider .corner-tl2 { top: 0; left: 0; width: 80px; height: 6px; }
.pv-divider .accent-strip {
  position: absolute; right: 0; top: 0; height: 100%; width: 100px;
  background: #f8fafc;
  border-left: 1px solid #e2e8f0;
}
.pv-divider .accent-block {
  position: absolute; right: 0; top: 30%; width: 60px; height: 40px;
  background: rgba(14,165,233,0.3);
}
.pv-divider .contents-label {
  position: absolute; bottom: 8px; left: 14px;
  font-family: var(--font-mono); font-size: 9px;
  letter-spacing: 0.15em; color: #1e293b;
}
.pv-divider-inner {
  position: relative; z-index: 10;
  display: grid; grid-template-columns: 1fr 1fr; gap: 30px;
}
.pv-divider .chap {
  border-left: 4px solid #e2e8f0; padding-left: 14px;
}
.pv-divider .chap.next { border-left-color: var(--sky-500); border-left-width: 6px; }
.pv-divider .chap .next-badge {
  display: inline-block; background: var(--sky-500); color: #fff;
  font-size: 9px; font-weight: 800; padding: 2px 6px; letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 6px;
}
.pv-divider .chap .num { font-size: 36px; font-weight: 800; color: #0f172a; line-height: 1; font-family: var(--font-mono); }
.pv-divider .chap .t  {
  font-size: 14px; font-weight: 800; color: #0f172a;
  border-bottom: 1px solid #0f172a;
  padding-bottom: 4px; margin: 4px 0 6px;
}
.pv-divider .chap .sec {
  font-size: 11px; color: #475569;
  display: flex; align-items: center; gap: 6px;
}
.pv-divider .chap .sec::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: #94a3b8; }

/* Cover slide mini */
.pv-cover {
  position: relative;
  background: #fff;
  min-height: 340px;
  padding: 32px 36px;
  overflow: hidden;
  font-family: var(--font-sans);
  color: #0f172a;
}
.pv-cover::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(#0f172a 1px, transparent 1px),
    linear-gradient(to right, #0f172a 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.08;
  pointer-events: none;
}
.pv-cover .strip { position: absolute; right: 0; top: 0; width: 28%; height: 100%; background: #f8fafc; }
.pv-cover .strip-accent { position: absolute; right: 4%; top: 0; width: 80px; height: 100%; background: rgba(2,132,199,0.1); }
.pv-cover .strip-bar { position: absolute; right: 8%; bottom: 0; width: 8px; height: 60%; background: #0f172a; }
.pv-cover .strip-sky { position: absolute; right: 0; top: 28%; width: 50%; height: 40px; background: var(--sky-500); }
.pv-cover-inner { position: relative; z-index: 5; }
.pv-cover .tag {
  display: flex; flex-direction: column; gap: 2px; margin-bottom: 16px;
}
.pv-cover .tag .bar { width: 50px; height: 4px; background: #0f172a; margin-bottom: 8px; }
.pv-cover .tag .meeting { font-size: 10px; font-weight: 800; letter-spacing: 0.2em; text-transform: uppercase; color: #1e293b; }
.pv-cover .tag .date    { font-family: var(--font-mono); font-size: 10px; color: var(--sky-800); }
.pv-cover .big {
  font-size: 44px; font-weight: 800; line-height: 0.95; letter-spacing: -0.02em;
  margin: 18px 0;
}
.pv-cover .big .l2 { color: #94a3b8; display: block; }
.pv-cover .authors {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 20px;
  position: relative; z-index: 5;
}
.pv-cover .authors .k {
  font-size: 9px; font-weight: 700; letter-spacing: 0.15em; color: #94a3b8;
  text-transform: uppercase; margin-bottom: 4px;
}
.pv-cover .authors .name { font-size: 18px; font-weight: 800; color: #0f172a; }
.pv-cover .authors .aff  { font-size: 11px; color: var(--sky-700); margin-top: 2px; }

/* End slide mini */
.pv-end {
  position: relative; min-height: 260px; background: #fff;
  padding: 36px; overflow: hidden;
}
.pv-end::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(#0f172a 1px, transparent 1px),
    linear-gradient(to right, #0f172a 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.08;
}
.pv-end .center {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 240px; height: 240px; border: 2px dashed #cbd5e1; border-radius: 50%;
  opacity: 0.6;
}
.pv-end .center2 {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 180px; height: 180px; border: 2px dotted var(--sky-700); border-radius: 50%;
  opacity: 0.35;
}
.pv-end .tl-sq {
  position: absolute; top: 30px; left: 30px;
  width: 80px; height: 80px; background: rgba(14,165,233,0.3);
}
.pv-end-inner {
  position: relative; z-index: 5;
  display: flex; flex-direction: column; gap: 12px;
  align-items: flex-start; padding: 18px;
}
.pv-end .bar { width: 50px; height: 4px; background: #0f172a; }
.pv-end .ty { font-size: 40px; font-weight: 800; color: #0f172a; line-height: 0.95; letter-spacing: -0.02em; }
.pv-end .ty .l2 { display: block; color: #cbd5e1; }
.pv-end .msg { font-size: 14px; font-family: var(--font-mono); color: var(--sky-800); margin-top: 4px; }
.pv-end .contact { font-size: 11px; color: #475569; margin-top: 8px; display: flex; gap: 10px; align-items: center; }
.pv-end .contact .k { font-weight: 800; color: #0f172a; font-size: 10px; letter-spacing: 0.1em; }

/* Language label */
.ja-en { display: block; }
.ja-en .ja { display: block; }
.ja-en .en { display: block; color: var(--mute); font-style: italic; font-size: 0.92em; font-weight: 500; margin-top: 2px; }

/* Responsive */
@media (max-width: 1200px) {
  .toc { display: none; }
  .app { grid-template-columns: var(--sidebar-w) 1fr; }
}
@media (max-width: 860px) {
  .sidebar { display: none; }
  .app { grid-template-columns: 1fr; }
  main { padding: 24px 20px 80px; }
  .hero-meta { grid-template-columns: 1fr 1fr; }
}