:root {
  --paper: #f3eee4;
  --paper-2: #e7dfd0;
  --ink: #1d1915;
  --muted: #6d6256;
  --line: #d9d0c2;
  --cinnabar: #c2452d;
  --cinnabar-ink: #fff8f4;
  --moss: #2c5b4c;
  --think: rgba(194, 69, 45, 0.08);
  --shadow: 0 24px 60px rgba(60, 36, 18, 0.08);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #141210;
    --paper-2: #211c17;
    --ink: #f4ecdf;
    --muted: #b5a794;
    --line: #3a332b;
    --cinnabar: #e38470;
    --cinnabar-ink: #2a1210;
    --moss: #9dccb8;
    --think: rgba(227, 132, 112, 0.12);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(194, 69, 45, 0.08), transparent 55%),
    var(--paper);
  color: var(--ink);
  font-family: "Noto Serif SC", "Newsreader", "Iowan Old Style", Palatino, serif;
  font-size: 17px;
  line-height: 1.65;
}

button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.kicker {
  margin: 0;
  font-family: Outfit, "Avenir Next", "PingFang SC", sans-serif;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cinnabar);
}
.seal {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border: 1.5px solid var(--cinnabar);
  border-radius: 50%;
  color: var(--cinnabar);
  font-weight: 600;
}
.boot, .gate {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}
.boot { gap: 16px; text-align: center; }
.boot p, .hint, .status, .empty p, .session small, .think summary, .refs {
  font-family: Outfit, "Avenir Next", "PingFang SC", sans-serif;
}
.gate-card {
  width: min(460px, 100%);
  padding: 36px 32px 28px;
  background: color-mix(in srgb, var(--paper) 88%, white);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.gate-card h1, .empty h2, .top h1 {
  font-weight: 600;
  letter-spacing: -0.03em;
}
.gate-card h1 { margin: 10px 0 8px; font-size: 40px; }
.lede { margin: 0 0 22px; color: var(--muted); }
.gate-form, #gate-form { display: grid; gap: 8px; }
label { font-family: Outfit, sans-serif; font-size: 13px; }
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 16px;
  padding: 12px 14px;
  outline: none;
}
input:focus, textarea:focus { border-color: var(--cinnabar); }
.hint { margin: 0; color: var(--muted); font-size: 13px; }
.error { min-height: 1.2em; margin: 0; color: var(--cinnabar); font-family: Outfit, sans-serif; font-size: 14px; }
button[type="submit"], .send, .new-chat {
  border: 0;
  background: var(--cinnabar);
  color: var(--cinnabar-ink);
  border-radius: 999px;
  padding: 10px 18px;
  font-family: Outfit, sans-serif;
}
button:disabled { opacity: 0.55; cursor: wait; }

.app {
  height: 100dvh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 0;
  padding: 22px 16px 16px;
  background: var(--paper-2);
  border-right: 1px solid var(--line);
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand strong { display: block; font-size: 22px; line-height: 1; }
.brand span { color: var(--muted); font-family: Outfit, sans-serif; font-size: 13px; }
.new-chat { width: 100%; }
.session-list { flex: 1; overflow: auto; display: flex; flex-direction: column; gap: 6px; }
.session {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 16px;
  padding: 4px 8px 4px 4px;
}
.session.active { background: var(--paper); border-color: var(--line); }
.session .open {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 6px 8px;
}
.session b { font-weight: 600; }
.session small { color: var(--muted); font-size: 12px; }
.session .trash {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: Outfit, sans-serif;
  font-size: 12px;
}
.text-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: Outfit, sans-serif;
  text-align: left;
  padding: 4px;
  text-decoration: none;
}
main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.top {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px 8px;
}
.top h1 { margin: 0; font-size: 28px; }
.menu { display: none; }
.status { margin: 0; color: var(--moss); font-size: 13px; min-height: 1.2em; }
.thread {
  flex: 1;
  overflow: auto;
  padding: 12px 28px 20px;
}
.empty { max-width: 640px; padding: 12vh 0 0; }
.empty h2 { margin: 8px 0; font-size: 42px; }
.empty p { color: var(--muted); }
.message { max-width: 760px; margin: 0 auto 22px; }
.message.user { display: flex; justify-content: flex-end; }
.slip {
  max-width: min(560px, 100%);
  padding: 12px 16px;
  border-left: 3px solid var(--cinnabar);
  background: color-mix(in srgb, var(--paper-2) 70%, transparent);
}
.answer { font-size: 18px; }
.answer p { margin: 0 0 0.8em; }
.answer p:last-child { margin-bottom: 0; }
.answer code, .think code {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.86em;
  background: var(--think);
  padding: 0.1em 0.35em;
  border-radius: 6px;
}
.answer pre {
  overflow: auto;
  padding: 12px 14px;
  background: var(--paper-2);
  border-radius: 16px;
}
.think {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 15px;
}
.think summary { cursor: pointer; color: var(--cinnabar); }
.think p { margin: 8px 0 0; }
.refs { margin: 8px 0 0; padding: 0; list-style: none; font-size: 13px; }
.refs a { color: var(--moss); }
.note {
  max-width: 760px;
  margin: 0 auto 16px;
  color: var(--cinnabar);
  font-family: Outfit, sans-serif;
  font-size: 14px;
}
.composer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
  margin: 0 28px 18px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: color-mix(in srgb, var(--paper) 80%, white);
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
}
textarea {
  resize: none;
  max-height: 180px;
  border: 0;
  padding: 10px 4px;
}
.toggles { display: flex; gap: 6px; padding-bottom: 4px; }
.toggle {
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 999px;
  padding: 6px 10px;
  font-family: Outfit, sans-serif;
  font-size: 13px;
}
.toggle.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.send.stop { background: transparent; color: var(--cinnabar); border: 1px solid var(--cinnabar); }
.noscript { padding: 24px; }

.ledger { max-width: 980px; margin: 0 auto; padding: 28px 20px 64px; }
.ledger-head, .row-actions, .stat-grid, .add-form { display: flex; gap: 12px; align-items: center; }
.ledger-head { justify-content: space-between; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin: 22px 0; }
.stat { padding: 14px 16px; border: 1px solid var(--line); border-radius: 18px; background: color-mix(in srgb, var(--paper) 80%, white); }
.stat b { display: block; font-size: 28px; line-height: 1.1; }
.stat span, .quota, .account small { color: var(--muted); font-family: Outfit, sans-serif; font-size: 13px; }
.quota, .account, .add-card { border: 1px solid var(--line); border-radius: 22px; padding: 16px 18px; margin: 12px 0; }
.account { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; }
.account h2 { margin: 0; font-size: 22px; }
.pill { font-family: Outfit, sans-serif; font-size: 12px; border-radius: 999px; padding: 3px 8px; border: 1px solid var(--line); }
.pill.ok { color: var(--moss); }
.pill.dead, .pill.cooldown { color: var(--cinnabar); }
.add-form { align-items: end; }
.add-form label { flex: 1; display: grid; gap: 6px; }
.danger, button.quiet { background: transparent; border-radius: 999px; padding: 8px 12px; font-family: Outfit, sans-serif; }
.danger { color: var(--cinnabar); border: 1px solid var(--cinnabar); }
button.quiet { color: var(--ink); border: 1px solid var(--line); }
@media (max-width: 800px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .add-form, .account, .ledger-head { display: grid; }
}

@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    z-index: 3;
    inset: 0 auto 0 0;
    width: min(84vw, 320px);
    transform: translateX(-105%);
    transition: transform 160ms ease;
  }
  .sidebar.open { transform: none; }
  .backdrop { position: fixed; inset: 0; background: rgba(20, 16, 12, 0.35); z-index: 2; }
  .menu { display: inline-flex; border: 0; background: transparent; font-family: Outfit, sans-serif; padding: 8px 0; }
  .top, .thread { padding-left: 16px; padding-right: 16px; }
  .composer { margin-left: 12px; margin-right: 12px; grid-template-columns: 1fr auto; }
  .toggles { grid-column: 1 / -1; }
  .empty h2, .gate-card h1 { font-size: 32px; }
}