/* ============================================================
   Nexus (rag-app) — Editorial Archive v4
   Entry point. Imports tokens, typography, components, then
   adds layout, topbar, bottombar, page shells.
   ============================================================ */

@import url('/css/tokens.css?v=18');
@import url('/css/type.css?v=18');
@import url('/css/components.css?v=35');

/* ── Reset ─────────────────────────────────────────────────── */

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

[hidden] { display: none !important; }

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--rule-strong) transparent;
}
html[data-theme="light"] { color-scheme: light; }

body {
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Grain overlay — only visible in light mode (subtle paper texture) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.11, 0 0 0 0 0.09, 0 0 0 0 0.07, 0 0 0 0.85 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: var(--grain-opacity);
  mix-blend-mode: multiply;
}

button { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

/* ── Topbar ────────────────────────────────────────────────── */

.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-4) var(--s-6);
  background: var(--overlay);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 20;
}

/* Left stack: brand above, tools below */
.topbar-left {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  min-width: 0;
}

.topbar-brand {
  display: flex;
  align-items: center;
  min-width: 0;
}
.topbar h1 {
  font-family: var(--font-display);
  font-size: var(--t-lg);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-snug);
  line-height: 1;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin: 0;
}

.topbar .brand-logo {
  display: inline-block;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background: url('/lib/img/cf-logo.png?v=18') center / contain no-repeat;
}

.topbar .brand-name {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--font-display);
  font-size: var(--t-lg);
}
.topbar h1 .sub {
  font-family: var(--font-body);
  color: var(--ink-muted);
  font-weight: var(--w-book);
  font-size: var(--t-sm);
  letter-spacing: var(--tracking-normal);
}

/* ── Tool tabs (Q&A / Transkript) — primary switcher ───────── */

.topbar-tools {
  display: flex;
  gap: var(--s-2);
  align-items: stretch;
  padding-left: calc(36px + var(--s-3));  /* align with brand text, past the logo */
}

.tool-tab {
  display: inline-flex;
  align-items: center;
  padding: var(--s-2) var(--s-3);
  font-family: var(--font-display);
  font-size: var(--t-lg);
  font-style: italic;
  font-weight: var(--w-med);
  letter-spacing: var(--tracking-snug);
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
  font-variation-settings: 'opsz' 72, 'SOFT' 50;
  line-height: 1;
  margin-bottom: -1px;   /* sit on the topbar bottom border so active underline meets it */
}
.tool-tab:first-child { padding-left: 0; }
.tool-tab:hover { color: var(--ink); }
.tool-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-variation-settings: 'opsz' 72, 'SOFT' 100, 'WONK' 1;
}

/* ── Utils nav (right side) ─────────────────────────────────── */

.topbar-utils {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  font-family: var(--font-body);
  font-size: var(--t-sm);
  color: var(--ink-dim);
  letter-spacing: var(--tracking-snug);
  justify-content: flex-end;
}
.topbar-utils a,
.topbar-utils .util-link {
  color: var(--ink-dim);
  font-family: var(--font-body);
  font-weight: var(--w-med);
  padding: var(--s-2) var(--s-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.topbar-utils a:hover {
  color: var(--ink);
}
.topbar-utils a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.topbar-utils .user-tag {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-muted);
  letter-spacing: var(--tracking-snug);
  padding-left: var(--s-3);
  border-left: 1px solid var(--rule);
}

/* Keep the old .user class for pages not yet migrated */
.topbar .user {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-dim);
}
.topbar .user a,
.topbar .user a:hover { color: inherit; }

/* Theme toggle button */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-dim);
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 999px;
  font-size: var(--t-base);
  transition: border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--ink); color: var(--ink); }

/* Minimal topbar variant (login) — no tools column */
.topbar--minimal { grid-template-columns: auto auto; }

/* ── Responsive — stack tools on narrow screens ───────────── */

@media (max-width: 720px) {
  .topbar { grid-template-columns: 1fr auto; gap: var(--s-3); }
  .topbar-tools { padding-left: 0; }
  .tool-tab { padding: var(--s-2) var(--s-3); font-size: var(--t-base); }
}

@media (max-width: 600px) {
  .topbar .brand-name .sub { display: none; }
  .topbar-utils { font-size: var(--t-xs); gap: var(--s-3); }
  .topbar-utils .user-tag { display: none; }
}

/* ── Bottombar ─────────────────────────────────────────────── */

.bottombar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: var(--s-4) var(--s-6);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-faint);
  letter-spacing: var(--tracking-snug);
  border-top: 1px solid var(--rule);
  margin-top: auto;
  background: var(--overlay);
}

/* ── Stage / layout ────────────────────────────────────────── */

.stage {
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
  padding: var(--s-7) var(--s-5);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
  position: relative;
  z-index: 2;
}

/* Prose-zentriertes Layout für Q&A-Flow (Frage stellen, History-Detail).
   Alle direkten Stage-Kinder werden in eine zentrierte Lesespalte gezogen,
   damit Hero, Antwort und Quellen als zusammenhängende Zeitungsspalte wirken
   statt links-flush in einer zu breiten Bühne. */
.stage--prose {
  max-width: 900px;
}
.stage--prose > * {
  width: 100%;
  max-width: min(68ch, 100%);
  margin-inline: auto;
}
.stage--prose .hero h2 {
  max-width: none;
}

/* Editorial 12-col layout with optional margin column */
.editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: var(--s-7);
  align-items: start;
}
@media (max-width: 960px) {
  .editorial-grid { grid-template-columns: 1fr; }
}

.margin-col {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-muted);
  letter-spacing: var(--tracking-snug);
  line-height: var(--lh-loose);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.margin-col h4 {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  font-weight: var(--w-med);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--ink-faint);
  padding-bottom: var(--s-1);
  border-bottom: 1px solid var(--rule);
  margin-bottom: var(--s-2);
}

/* ── Hero block (page titles) ──────────────────────────────── */

.hero {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding-bottom: var(--s-5);
  border-bottom: 2px solid var(--ink);
  position: relative;
}

.hero h2 {
  font-family: var(--font-display);
  font-size: clamp(var(--t-3xl), 6vw, var(--t-4xl));
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-tight);
  line-height: var(--lh-tight);
  font-variation-settings: 'opsz' 144, 'SOFT' 30;
  max-width: 18ch;
}
.hero h2 .accent,
.hero h2 em {
  font-style: italic;
  color: var(--accent);
  font-variation-settings: 'opsz' 144, 'SOFT' 100, 'WONK' 1;
}

.hero .lede {
  font-family: var(--font-display);
  font-size: var(--t-xl);
  font-style: italic;
  font-weight: var(--w-book);
  color: var(--ink-dim);
  line-height: var(--lh-snug);
  max-width: 52ch;
  font-variation-settings: 'opsz' 72, 'SOFT' 80;
}

/* ── Reveal animations (staggered on load) ─────────────────── */

@media (prefers-reduced-motion: no-preference) {
  .stage > * {
    opacity: 0;
    transform: translateY(8px);
    animation: reveal 500ms var(--ease-out) forwards;
  }
  .stage > *:nth-child(1) { animation-delay: 0ms; }
  .stage > *:nth-child(2) { animation-delay: 80ms; }
  .stage > *:nth-child(3) { animation-delay: 160ms; }
  .stage > *:nth-child(4) { animation-delay: 240ms; }
  .stage > *:nth-child(5) { animation-delay: 320ms; }
  .stage > *:nth-child(n+6) { animation-delay: 400ms; }

  @keyframes reveal {
    to { opacity: 1; transform: translateY(0); }
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── View Transitions API (Chrome/Edge/Safari 18+) ─────────── */

@supports (view-transition-name: none) {
  @view-transition { navigation: auto; }

  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: var(--dur-page);
    animation-timing-function: var(--ease-out);
  }
}

.topbar { view-transition-name: topbar; }
.bottombar { view-transition-name: bottombar; }

/* ── Answer (Q&A render) ───────────────────────────────────── */

.answer {
  font-family: var(--font-body);
  font-size: var(--t-base);
  line-height: var(--lh-loose);
  color: var(--ink);
  max-width: var(--prose-max);
}
.answer > p:first-of-type { /* drop-cap lives on an added class, not first-p automatically */ }
.answer h1, .answer h2, .answer h3, .answer h4 {
  font-family: var(--font-display);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-snug);
  color: var(--ink);
  margin: 1.5em 0 0.5em;
  line-height: var(--lh-snug);
}
.answer h1 { font-size: var(--t-2xl); font-style: italic; }
.answer h2 { font-size: var(--t-xl); }
.answer h3 { font-size: var(--t-lg); }
.answer p  { margin: 0.8em 0; }
.answer ul, .answer ol { margin: 0.8em 0 0.8em 1.6em; }
.answer li { margin: 0.35em 0; }
.answer code {
  background: var(--inset);
  padding: 0.12em 0.4em;
  font-size: 0.88em;
  color: var(--accent);
  border-bottom: 1px solid var(--rule);
}
.answer pre {
  background: var(--inset);
  padding: var(--s-4);
  overflow-x: auto;
  margin: 1em 0;
  border-left: 2px solid var(--accent);
  font-size: var(--t-sm);
  line-height: var(--lh-body);
}
.answer pre code {
  background: transparent;
  padding: 0;
  border: none;
  color: var(--ink);
}
.answer strong { color: var(--ink); font-weight: var(--w-semi); }
.answer em { font-style: italic; color: var(--ink); }
.answer blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--t-lg);
  color: var(--ink-dim);
  border-left: 2px solid var(--accent);
  padding: 0.3em 0 0.3em 1.2em;
  margin: 1.2em 0;
  line-height: var(--lh-snug);
}
.answer a {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
  text-underline-offset: 4px;
}

/* ── Filter-bar (history page) ─────────────────────────────── */

.filter-bar {
  display: flex;
  gap: var(--s-4);
  align-items: center;
  flex-wrap: wrap;
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--rule);
}
.filter-bar input[type='text'],
.filter-bar input[type='search'] {
  flex: 1;
  min-width: 200px;
  border: none;
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.5em 0;
  background: transparent;
  font-family: var(--font-body);
}
.filter-bar input:focus { border-bottom-color: var(--accent); }
.filter-bar select {
  width: auto;
  min-width: 140px;
  border: none;
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.5em 0;
  background: transparent;
}
.filter-bar .label.inline {
  margin: 0;
  flex-shrink: 0;
}
.filter-bar .status { margin-left: auto; }

.label.inline { display: inline-block; margin-bottom: 0; }

/* ── History rows ──────────────────────────────────────────── */

.history-list {
  counter-reset: row;
  display: flex;
  flex-direction: column;
}
.history-row {
  display: grid;
  grid-template-columns: 3rem 8ch 1fr 6ch 7ch;
  gap: var(--s-4);
  padding: var(--s-4) 0;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  align-items: baseline;
  transition: color var(--dur-fast) var(--ease),
              padding-left var(--dur-fast) var(--ease);
  counter-increment: row;
}
.history-row:first-of-type { border-top: 2px solid var(--ink); }
.history-row::before {
  content: counter(row, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-faint);
  letter-spacing: var(--tracking-wider);
}
.history-row:hover {
  color: var(--accent);
  padding-left: var(--s-2);
}
.history-row .date {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-muted);
  letter-spacing: var(--tracking-snug);
}
.history-row .title {
  font-family: var(--font-body);
  font-size: var(--t-base);
  color: var(--ink);
}
.history-row .num {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  color: var(--ink-muted);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

@media (max-width: 640px) {
  .history-row { grid-template-columns: 2rem 1fr auto; }
  .history-row .date, .history-row .num:not(:last-child) { display: none; }
}

/* ── Scrollbars ────────────────────────────────────────────── */

*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--rule-strong);
  border-radius: 0;
}
*::-webkit-scrollbar-thumb:hover { background: var(--ink-muted); }