:root {
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #0b0d10;
  --surface: #101318;
  --surface-2: #151920;
  --surface-3: #1b2028;
  --text: #f3f4f6;
  --text-soft: #c9ced6;
  --muted: #878e99;
  --line: #262c35;
  --line-strong: #343c47;
  --accent: #d5dae2;
  --live: #70c998;
  --warning: #d8b46a;
  --danger: #d78080;

  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --input-h: 44px;
  --icon: 20px;
  --rail-w: 92px;
  --content-max: 1180px;
  --reader-max: 760px;

  --bp-mobile: 720px;
  --bp-tablet: 1100px;
}

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

html { background: var(--bg); color-scheme: dark; }

body {
  margin: 0;
  min-width: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 72% -10%, rgba(255,255,255,.035), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
svg { width: var(--icon); height: var(--icon); fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

:focus-visible {
  outline: 2px solid #d8dce3;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-3);
  left: var(--space-3);
  padding: .65rem .85rem;
  transform: translateY(-180%);
  background: var(--text);
  color: var(--bg);
  border-radius: var(--radius-sm);
}
.skip-link:focus { transform: translateY(0); }

.svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.app-shell {
  min-height: 100vh;
  padding-left: var(--rail-w);
}

.nav-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 30;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border-right: 1px solid var(--line);
  background: rgba(11,13,16,.94);
  backdrop-filter: blur(16px);
}

.brand {
  min-height: 92px;
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--line);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
}
.brand-copy { display: none; }

.primary-nav {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-2);
}

.primary-nav a,
.account-link {
  min-height: 58px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .35rem;
  color: var(--muted);
  border-radius: var(--radius-md);
  font-size: .63rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: background .18s ease, color .18s ease;
}

.primary-nav a:hover,
.account-link:hover { color: var(--text-soft); background: rgba(255,255,255,.025); }

.primary-nav a[aria-current="page"],
.account-link[aria-current="page"] {
  color: var(--text);
  background: var(--surface-2);
}

.account-link {
  margin: 0 var(--space-2) var(--space-4);
  border-top: 1px solid transparent;
}

.avatar {
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--text-soft);
  font-size: .75rem;
}

.mobile-topbar,
.bottom-nav { display: none; }

.route-view {
  min-width: 0;
  min-height: 100vh;
}

.page {
  width: min(100%, var(--content-max));
  min-width: 0;
  margin: 0 auto;
  padding: var(--space-12) clamp(1.25rem, 4vw, 4rem) var(--space-16);
}

.page--reader {
  width: min(100%, calc(var(--reader-max) + 8rem));
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--muted);
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: var(--space-3);
  font-size: clamp(1.8rem, 3.2vw, 3.15rem);
  line-height: 1.04;
  letter-spacing: -.045em;
}
h2 {
  margin-bottom: var(--space-4);
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  letter-spacing: -.025em;
}
h3 {
  margin-bottom: var(--space-2);
  font-size: 1rem;
}
.lede {
  max-width: 62ch;
  margin-bottom: 0;
  color: var(--text-soft);
  line-height: 1.65;
}
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.meta { color: var(--muted); font-size: .82rem; }

.status-line {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  color: var(--text-soft);
  font-size: .78rem;
  font-weight: 650;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}
.status-dot.live { background: var(--live); box-shadow: 0 0 0 4px rgba(112,201,152,.08); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: var(--text-soft);
  font-size: .9rem;
}
.text-link:hover { color: var(--text); }
.text-link svg { width: 16px; height: 16px; }

.section {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--line);
}
.section:first-of-type { border-top: 0; }

.action-list,
.content-list,
.case-list,
.session-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.action-row,
.content-row,
.case-row,
.session-row {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--line);
}
.action-row p,
.content-row p,
.case-row p,
.session-row p { margin: .25rem 0 0; color: var(--muted); line-height: 1.5; }
.row-title { font-weight: 650; letter-spacing: -.01em; }

.chip-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.chip {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 .8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: .78rem;
}
.chip.active {
  color: var(--text);
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.quick-links a {
  min-height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-5);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--text-soft);
}
.quick-links a:hover { background: rgba(255,255,255,.018); color: var(--text); }
.quick-links svg { width: 17px; height: 17px; }

.closed-hero {
  min-height: 48vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 780px;
}
.closed-hero .next-session {
  margin-top: var(--space-8);
  color: var(--text-soft);
  font-size: .95rem;
}

.cafe-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: var(--space-10);
}
.chat-shell { min-width: 0; }
.chat-stream {
  min-height: 52vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-6);
  padding: var(--space-6) 0;
}
.message {
  max-width: 72ch;
}
.message-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: .35rem;
}
.message-author { font-weight: 650; font-size: .9rem; }
.message-time { color: var(--muted); font-size: .72rem; }
.message-body { color: var(--text-soft); line-height: 1.6; }
.message.self { margin-left: auto; text-align: right; }
.message.system .message-body { color: var(--muted); font-size: .88rem; }

.composer {
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.composer input {
  min-width: 0;
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
}
.composer input::placeholder { color: #666e78; }
.composer button {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--surface-3);
}
.composer button:disabled { opacity: .55; cursor: not-allowed; }

.context-panel {
  align-self: start;
  position: sticky;
  top: var(--space-8);
  padding-top: var(--space-2);
}
.context-title {
  margin-bottom: var(--space-4);
  color: var(--muted);
  font-size: .72rem;
  font-weight: 650;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.online-list {
  display: grid;
  gap: var(--space-4);
}
.online-person {
  display: grid;
  grid-template-columns: 9px minmax(0,1fr);
  gap: var(--space-3);
  align-items: start;
}
.online-person .presence {
  width: 7px; height: 7px; margin-top: .4rem; border-radius: 50%; background: var(--live);
}
.online-person strong { display: block; font-size: .88rem; }
.online-person span { display: block; margin-top: .2rem; color: var(--muted); font-size: .72rem; }

.context-drawer { display: none; }

.library-grid,
.pdf-grid,
.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--space-8);
}
.library-card,
.pdf-card,
.tool-card {
  min-width: 0;
  padding: var(--space-6) 0;
  border-top: 1px solid var(--line);
}
.library-card h2,
.pdf-card h2,
.tool-card h2 { margin-bottom: var(--space-2); font-size: 1.15rem; }
.library-card p,
.pdf-card p,
.tool-card p { color: var(--muted); line-height: 1.55; }
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
  color: var(--muted);
  font-size: .76rem;
}
.cover {
  aspect-ratio: 16/9;
  display: grid;
  place-items: end start;
  margin-bottom: var(--space-5);
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background:
    linear-gradient(145deg, rgba(255,255,255,.04), transparent 60%),
    var(--surface-2);
  color: var(--muted);
  font-size: .72rem;
  letter-spacing: .08em;
}
.pdf-card .cover { aspect-ratio: 4/5; max-height: 280px; }

.article-head {
  padding: var(--space-8) 0 var(--space-10);
  border-bottom: 1px solid var(--line);
}
.article-body {
  padding: var(--space-10) 0;
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.85;
}
.article-body p { margin-bottom: 1.4em; }
.article-body h2 { margin-top: 2.2em; color: var(--text); }

.quiz-shell { max-width: 820px; }
.quiz-question {
  margin-bottom: var(--space-8);
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.35;
  letter-spacing: -.025em;
}
.choice-list {
  display: grid;
  gap: var(--space-3);
}
.choice {
  width: 100%;
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: .75rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: transparent;
  text-align: left;
}
.choice:hover { border-color: var(--line-strong); background: rgba(255,255,255,.018); }
.choice-key {
  width: 30px; height: 30px; display: grid; place-items: center;
  border: 1px solid var(--line-strong); border-radius: 50%; color: var(--muted); font-size: .78rem;
}

.radio-stage {
  min-height: 56vh;
  display: grid;
  align-content: center;
  max-width: 760px;
}
.now-playing {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.track-title { font-size: clamp(1.5rem, 3vw, 2.6rem); letter-spacing: -.04em; }
.track-artist { color: var(--muted); }
.player-row {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-top: var(--space-6);
}
.play-button {
  width: 52px; height: 52px; border: 1px solid var(--line-strong); border-radius: 50%; background: var(--surface-2);
}
.progress { flex: 1; height: 2px; background: var(--line); }
.progress span { display: block; width: 32%; height: 100%; background: var(--text-soft); }

.account-grid {
  display: grid;
  grid-template-columns: 240px minmax(0,1fr);
  gap: var(--space-12);
}
.profile-summary {
  padding-top: var(--space-2);
}
.profile-avatar {
  width: 72px; height: 72px; display: grid; place-items: center;
  margin-bottom: var(--space-5); border: 1px solid var(--line-strong); border-radius: 50%;
  font-size: 1.25rem;
}
.definition-list { margin: 0; }
.definition-row {
  display: grid;
  grid-template-columns: minmax(140px, .45fr) minmax(0,1fr);
  gap: var(--space-6);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--line);
}
.definition-row dt { color: var(--muted); }
.definition-row dd { margin: 0; }

.admin-frame {
  display: grid;
  grid-template-columns: 190px minmax(0,1fr);
  gap: var(--space-12);
}
.admin-nav {
  align-self: start;
  position: sticky;
  top: var(--space-8);
  display: grid;
  gap: .15rem;
}
.admin-nav .admin-label {
  margin-bottom: var(--space-4);
  color: var(--muted);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.admin-nav a {
  min-height: 38px;
  display: flex;
  align-items: center;
  padding: 0 .7rem;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: .84rem;
}
.admin-nav a:hover,
.admin-nav a[aria-current="page"] { background: var(--surface-2); color: var(--text); }

.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
}
.notice-state {
  width: 8px; height: 8px; margin-top: .4rem; border-radius: 50%; background: var(--warning);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}
.case-row {
  grid-template-columns: minmax(0,1fr) auto auto;
}
.case-state { color: var(--warning); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.case-time { color: var(--muted); font-size: .75rem; }

.empty-note {
  padding: var(--space-8) 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 1100px) {
  :root { --rail-w: 76px; }
  .page { padding-inline: clamp(1.25rem, 3.5vw, 2.5rem); }
  .cafe-layout { grid-template-columns: minmax(0,1fr); }
  .context-panel { display: none; }
  .context-drawer {
    display: block;
    margin: 0 0 var(--space-4);
    border-bottom: 1px solid var(--line);
  }
  .context-drawer summary {
    min-height: 44px;
    display: flex;
    align-items: center;
    color: var(--muted);
    cursor: pointer;
    list-style: none;
  }
  .context-drawer summary::-webkit-details-marker { display: none; }
  .context-drawer .online-list { padding-bottom: var(--space-5); }
  .admin-frame { grid-template-columns: 160px minmax(0,1fr); gap: var(--space-8); }
}

@media (max-width: 720px) {
  :root { --rail-w: 0px; }
  body { padding-bottom: calc(70px + env(safe-area-inset-bottom)); }
  .app-shell { padding-left: 0; }
  .nav-rail { display: none; }
  .mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 25;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    border-bottom: 1px solid var(--line);
    background: rgba(11,13,16,.94);
    backdrop-filter: blur(16px);
  }
  .mobile-brand { font-size: .82rem; font-weight: 700; letter-spacing: .08em; }
  .mobile-brand span { color: var(--muted); font-weight: 500; }
  .mobile-account { min-width: 44px; min-height: 44px; display: grid; place-items: center; }
  .bottom-nav {
    position: fixed;
    z-index: 40;
    inset: auto 0 0;
    min-height: calc(66px + env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: repeat(5, minmax(0,1fr));
    padding-bottom: env(safe-area-inset-bottom);
    border-top: 1px solid var(--line);
    background: rgba(11,13,16,.96);
    backdrop-filter: blur(18px);
  }
  .bottom-nav a {
    min-width: 0;
    min-height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .3rem;
    color: var(--muted);
    font-size: .66rem;
  }
  .bottom-nav a[aria-current="page"] { color: var(--text); }
  .bottom-nav svg { width: 19px; height: 19px; }

  .page { padding: var(--space-8) 1rem var(--space-12); }
  .page-head { display: block; margin-bottom: var(--space-8); }
  .page-head > :last-child:not(:first-child) { margin-top: var(--space-4); }

  .closed-hero { min-height: 42vh; }
  .quick-links { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .quick-links a { min-height: 92px; padding: var(--space-4); }

  .chat-stream { min-height: 46vh; }
  .message { max-width: 92%; }
  .composer { border-radius: var(--radius-md); }

  .library-grid,
  .pdf-grid,
  .tool-grid { grid-template-columns: minmax(0,1fr); gap: var(--space-4); }
  .pdf-card .cover { max-height: 230px; }

  .article-body { font-size: 1rem; line-height: 1.78; }

  .account-grid { grid-template-columns: minmax(0,1fr); gap: var(--space-8); }
  .definition-row { grid-template-columns: minmax(0,1fr); gap: .35rem; }

  .admin-frame { grid-template-columns: minmax(0,1fr); gap: var(--space-6); }
  .admin-nav {
    position: static;
    display: flex;
    gap: .25rem;
    overflow-x: auto;
    padding-bottom: var(--space-2);
    scrollbar-width: none;
  }
  .admin-nav::-webkit-scrollbar { display: none; }
  .admin-nav .admin-label { display: none; }
  .admin-nav a { flex: 0 0 auto; border: 1px solid var(--line); }
  .case-row { grid-template-columns: minmax(0,1fr); gap: var(--space-2); }
  .case-state, .case-time { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* FAZ 3 — Authentication */
.auth-page{min-height:100vh;display:grid;align-items:center}
.auth-shell{width:min(100%,540px);margin:0 auto;padding-block:var(--space-12)}
.auth-head{margin-bottom:var(--space-8)}
.auth-form{display:grid;gap:var(--space-5);padding-top:var(--space-2)}
.auth-field{display:grid;gap:.55rem;color:var(--text-soft);font-size:.82rem}
.auth-field input{width:100%;min-height:var(--input-h);padding:0 .9rem;border:1px solid var(--line);border-radius:var(--radius-sm);outline:0;background:var(--surface);color:var(--text)}
.auth-field input:focus{border-color:var(--line-strong);box-shadow:0 0 0 3px rgba(255,255,255,.035)}
.auth-submit{min-height:46px;margin-top:var(--space-2);border:1px solid var(--line-strong);border-radius:var(--radius-sm);background:var(--text);color:var(--bg);font-weight:700;cursor:pointer}
.auth-submit:hover{opacity:.92}
.auth-hint{margin:calc(var(--space-2)*-1) 0 0;color:var(--muted);font-size:.76rem;line-height:1.55}
.auth-status{min-height:1.5rem;margin-top:var(--space-5);color:var(--muted);font-size:.84rem;line-height:1.5}
.auth-status[data-kind="success"]{color:var(--live)}
.auth-status[data-kind="error"]{color:var(--danger)}
.auth-links{display:flex;flex-wrap:wrap;gap:var(--space-4);margin-top:var(--space-6);padding-top:var(--space-5);border-top:1px solid var(--line);color:var(--muted);font-size:.82rem}
.auth-links a:hover{color:var(--text)}
@media(max-width:720px){.auth-page{align-items:start}.auth-shell{padding-block:var(--space-6)}.auth-submit{min-height:48px}}