:root {
  color-scheme: dark;
  --bg: #0b0f17;
  --panel: #111827;
  --panel-2: #172033;
  --border: #2d374b;
  --text: #f8fafc;
  --muted: #9ca3af;
  --accent: #60a5fa;
  --accent-2: #facc15;
  --danger: #f87171;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.shell { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  background: #111827;
  border-right: 1px solid var(--border);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand-mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 8px; background: #eab308; color: #111827; font-weight: 800;
}
.brand strong, .brand span { display: block; }
.brand span, .muted, .panel p, .status-card span { color: var(--muted); }
.nav { display: grid; gap: 10px; }
.nav-item, button, input, textarea {
  font: inherit;
}
.nav-item, .ghost, .primary {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
  cursor: pointer;
}
.nav-item.active, .primary { background: #2563eb; border-color: #3b82f6; }
.ghost:hover, .nav-item:hover { border-color: var(--accent); }
.status-card {
  margin-top: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: grid;
  gap: 4px;
}
.status-card strong { font-size: 32px; }
.main { padding: 36px clamp(20px, 4vw, 64px); position: relative; }
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}
h1, h2 { margin: 0; letter-spacing: 0; }
h1 { font-size: 30px; }
h2 { font-size: 20px; }
.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 8px;
  padding: 22px;
  margin-bottom: 18px;
}
.panel-head { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.mode-pill {
  align-self: start;
  border: 1px solid #3b82f6;
  color: #bfdbfe;
  padding: 8px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.stack { display: grid; gap: 14px; }
label { display: grid; gap: 8px; font-weight: 650; }
input, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  padding: 12px;
}
textarea { resize: vertical; min-height: 180px; line-height: 1.55; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.primary, .ghost { padding: 0 16px; }
.tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.tab {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  padding: 10px 14px;
}
.tab.active { color: var(--text); background: var(--panel-2); }
.auth-panel { max-width: 620px; }
.answer {
  white-space: pre-wrap;
  line-height: 1.65;
  font-size: 16px;
}
.citation-status {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 18px;
  line-height: 1.5;
}
.citation-status.verified { border-left-color: #34d399; background: #0d2924; color: #d1fae5; }
.citation-status.warning { border-left-color: #f59e0b; background: #33230c; color: #fef3c7; }
.sources-list { display: grid; gap: 12px; }
.source-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  background: #0f172a;
}
.source-card strong { display: block; margin-bottom: 6px; }
.source-card dl {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 5px 12px;
  margin: 10px 0 0;
}
.source-card dt { color: var(--muted); }
.empty { color: var(--muted); }
.account-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}
.account-grid > div {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
}
.account-grid span, .account-grid strong { display: block; }
.topup-form { display: flex; gap: 12px; align-items: end; max-width: 520px; }
.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  max-width: 420px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #1f2937;
  box-shadow: 0 18px 45px rgba(0,0,0,.35);
}
.hidden { display: none !important; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .topbar, .panel-head { flex-direction: column; }
  .account-grid { grid-template-columns: 1fr; }
  .topup-form { display: grid; }
}