:root {
  /* First Light's light palette (index.html :root; docs/kb-notes/reference-ui-design-system.md).
     The portal kept its own blues and grays until the S423 UI pass. */
  --seal-blue: #002F6D;
  --cobalt: #0047AB;
  --cobalt-on-dark: #7DA1D4;
  --paper: #F4F2ED;
  --surface-opaque: #FFFFFF;
  --surface-subtle: #F7F5F1;
  --surface-muted: #ECE9E2;
  --border: rgba(28,28,26,.14);
  --border-strong: rgba(28,28,26,.30);
  --text-strong: #1C1C1A;
  --text-body: #3A3A36;
  --text-muted: #5C5C55;
  --mustard-on-dark: #E3B341;
  --hunter: #2C601A;
  --crimson: #920000;
  --on-seal: #FFFFFF;
  --overlay: rgba(28,28,26,.55);
  --code-ground: #1C1C1A;
  --code-ink: #F4F2ED;
  --tint-info: #EAF0F8;
  --tint-success: #EAF2E6;
  --tint-error: #F8E9E9;
  --tint-quote: #FBF6E8;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--paper);
  color: var(--text-strong);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.container { max-width: 760px; margin: 0 auto; padding: 24px; width: 100%; }
a { color: var(--cobalt); }

/* A skip link, off screen until it takes focus. */
.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus { left: 8px; top: 8px; z-index: 2000; background: var(--surface-opaque); color: var(--cobalt); padding: 6px 10px; }

/* ── header ── */
header.brand {
  background: var(--seal-blue);
  color: var(--on-seal);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
header.brand h1 { margin: 0; font-size: 1.15rem; font-weight: 600; letter-spacing: 0.02em; }
header.brand .sub { font-size: 0.82rem; opacity: 0.85; }
.header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.session-box { display: flex; align-items: center; gap: 10px; }
.session-email { font-size: 0.85rem; opacity: 0.9; }

/* ── cards / generic ── */
.card {
  background: var(--surface-opaque);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.card h2 { margin-top: 0; color: var(--seal-blue); font-size: 1.2rem; }
.muted { color: var(--text-muted); font-size: 0.92rem; }
.ask-box {
  background: var(--seal-blue);
  color: var(--on-seal); padding: 20px 24px; border-radius: 8px; margin-bottom: 20px;
}
.ask-box .amount { font-size: 1.8rem; font-weight: 700; }
.ask-box .breakdown { font-size: 0.95rem; opacity: 0.92; margin-top: 4px; }

/* ── forms / buttons ── */
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 4px; }
.field input[type="email"], .field input[type="password"] {
  width: 100%; padding: 10px 12px; font-size: 1rem;
  border: 1px solid var(--border); border-radius: 6px;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  /* Controls are underlined words (Sam, 2026-10-09): no border, no fill, 24px tall. */
  display: inline-flex; align-items: center; min-height: 24px;
  border: 0; background: none; color: var(--cobalt); font: inherit; font-size: 0.95rem; font-weight: 600;
  padding: 2px 0; cursor: pointer;
  text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px;
}
.btn:hover { text-decoration-thickness: 2px; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--cobalt); outline-offset: 2px;
}
.btn-sm { font-size: 0.88rem; }
.btn:disabled { color: var(--text-muted); cursor: default; text-decoration: none; }
.actions { row-gap: 8px; column-gap: 20px; }
header.brand .btn { color: var(--on-seal); }
header.brand .btn:focus-visible { outline-color: var(--on-seal); }

.status-banner { padding: 12px 16px; border-radius: 6px; font-size: 0.92rem; }
.status-banner.info    { background: var(--tint-info); color: var(--seal-blue); border: 1px solid var(--border); }
.status-banner.success { background: var(--tint-success); color: var(--hunter); border: 1px solid var(--border); }
.status-banner.error   { background: var(--tint-error); color: var(--crimson); border: 1px solid var(--border); }

/* ── footer ── */
.foot {
  margin-top: auto; text-align: center; font-size: 0.82rem; color: var(--text-muted);
  padding: 18px; border-top: 1px solid var(--border);
}

/* ── reader layout ── */
.reader { flex: 1; display: grid; grid-template-columns: 280px 1fr; min-height: 0; }
.sidebar {
  border-right: 1px solid var(--border); background: var(--surface-opaque);
  padding: 16px; overflow-y: auto; max-height: calc(100vh - 52px);
}
.nav-filter {
  width: 100%; padding: 8px 10px; font-size: 0.9rem; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: 6px;
}
.nav-group { margin-bottom: 14px; }
.nav-group-label {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); font-weight: 700; margin: 6px 4px;
}
.nav-link {
  display: block; padding: 6px 10px; border-radius: 6px; font-size: 0.9rem;
  color: var(--text-strong); text-decoration: none;
}
.nav-link:hover { background: var(--surface-muted); }
.nav-link.active { background: var(--seal-blue); color: var(--on-seal); }

.content { padding: 28px 36px; overflow-y: auto; max-height: calc(100vh - 52px); }
.doc-meta { margin-bottom: 8px; }
.src-link { font-size: 0.82rem; color: var(--cobalt); display: inline-flex; align-items: center; min-height: 24px; }
.welcome { max-width: 640px; }

/* ── markdown ── */
.markdown-body { max-width: 820px; }
.markdown-body h1 { color: var(--seal-blue); font-size: 1.7rem; margin-top: 0; }
.markdown-body h2 { color: var(--seal-blue); font-size: 1.3rem; border-bottom: 1px solid var(--border); padding-bottom: 4px; margin-top: 1.8em; }
.markdown-body h3 { font-size: 1.08rem; margin-top: 1.4em; }
.markdown-body p, .markdown-body li { font-size: 0.96rem; }
.markdown-body a { color: var(--cobalt); }
.markdown-body code {
  background: var(--surface-muted); padding: 1px 5px; border-radius: 4px; font-size: 0.88em;
}
.markdown-body pre { background: var(--code-ground); color: var(--code-ink); padding: 14px; border-radius: 8px; overflow-x: auto; }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body blockquote {
  margin: 1em 0; padding: 10px 16px; border-left: 4px solid var(--mustard-on-dark);
  background: var(--tint-quote); border-radius: 0 6px 6px 0;
}
.markdown-body table { border-collapse: collapse; width: 100%; margin: 1em 0; font-size: 0.9rem; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.markdown-body th { background: var(--surface-muted); }

/* ── New-doc composer (modal) ── */
.composer-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: var(--overlay);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 28px 16px; overflow-y: auto;
}
.composer {
  background: var(--surface-opaque); border: 1px solid var(--border);
  border-radius: 10px; width: 100%; max-width: 760px; padding: 22px 24px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.composer-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.composer-head h2 { margin: 0; color: var(--seal-blue); font-size: 1.2rem; }
.composer-x {
  background: transparent; border: none; font-size: 1.05rem; cursor: pointer;
  color: var(--text-muted); padding: 4px 9px; border-radius: 6px; line-height: 1;
}
.composer-x:hover { background: var(--surface-muted); color: var(--text-strong); }
.composer-intro { margin: 6px 0 16px; }
.composer-row { display: flex; gap: 14px; flex-wrap: wrap; }
.composer-row .field { flex: 1 1 220px; }
.composer input[type="text"], .composer select, .composer textarea {
  width: 100%; padding: 10px 12px; font-size: 0.95rem;
  border: 1px solid var(--border); border-radius: 6px;
  font-family: inherit; background: var(--surface-opaque); color: var(--text-strong);
}
.composer textarea {
  resize: vertical; min-height: 180px; line-height: 1.45;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.86rem;
}
.composer-actions { margin-top: 6px; }
.composer-foot { margin: 14px 0 0; font-size: 0.8rem; }

/* attachments */
.composer-attach-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.composer-attach-hint { font-size: 0.8rem; }
.composer-attach-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.composer-attach-list:empty { display: none; }
.composer-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--surface-muted); border: 1px solid var(--border);
  border-radius: 14px; padding: 4px 6px 4px 10px; font-size: 0.82rem;
}
.composer-chip-extracting { opacity: 0.7; }
.composer-chip-error { background: var(--tint-error); border-color: var(--border); color: var(--crimson); }
.composer-chip-x {
  background: transparent; border: none; cursor: pointer;
  font-size: 0.8rem; line-height: 1; color: var(--text-muted); padding: 0 2px;
  min-width: 24px; min-height: 24px;
}
.composer-chip-x:hover { color: var(--text-strong); }

@media (max-width: 600px) { .composer { padding: 16px; } }

/* ── responsive ── */
@media (max-width: 720px) {
  .reader { grid-template-columns: 1fr; }
  .sidebar { max-height: none; border-right: none; border-bottom: 1px solid var(--border); }
  .content { max-height: none; padding: 20px; }
}
.composer input[type="file"] { min-height: 24px; }