/* investor-kb SPA — vanilla CSS, no framework, no build step.
   Mobile-friendly, single-user, dark-on-light. */

*, *::before, *::after { box-sizing: border-box; }
:root {
  --bg: #fafaf7;
  --panel: #ffffff;
  --ink: #1c2330;
  --muted: #5b6473;
  --faint: #8a93a3;
  --line: #e7e3da;
  --accent: #1f6f6b;
  --accent-soft: #e6f0ef;
  --accent-ink: #0f4d49;
  --good: #1f7a4d;
  --good-soft: #e7f3ec;
  --warn: #a9762a;
  --warn-soft: #f7efe1;
  --bad: #b23b3b;
  --bad-soft: #f6e9e8;
  --code-bg: #f3f1ea;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}
.container { max-width: 880px; margin: 0 auto; padding: 0 24px; }

/* ── Header ─────────────────────────────────────────────────────── */
header.top {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  padding: 18px 0;
  margin-bottom: 32px;
}
header.top .row {
  display: flex; align-items: center; gap: 16px;
  justify-content: space-between; flex-wrap: wrap;
}
header.top h1 { margin: 0; font-size: 20px; letter-spacing: -.01em; font-weight: 700; }
header.top h1 a { color: var(--ink); text-decoration: none; }
header.top h1 .small { color: var(--faint); font-weight: 400; font-size: 14px; margin-left: 6px; }
.user { font-size: 14px; color: var(--muted); }
.user a { color: var(--accent-ink); }

/* ── Buttons & links ────────────────────────────────────────────── */
.btn, button {
  font: inherit; cursor: pointer; text-decoration: none;
  background: var(--accent); color: white; border: none; border-radius: 8px;
  padding: 8px 14px; font-weight: 500; line-height: 1.3;
  display: inline-block;
}
.btn.secondary, button.secondary {
  background: var(--accent-soft); color: var(--accent-ink);
}
.btn:hover, button:hover { opacity: 0.88; }
.btn:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Lists ──────────────────────────────────────────────────────── */
.section-title {
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--faint); margin: 32px 0 12px; font-weight: 700;
}
.article-list { list-style: none; padding: 0; margin: 0; }
.article-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 20px; margin-bottom: 12px;
}
.article-card a.title {
  color: var(--ink); text-decoration: none; font-weight: 600; font-size: 17px;
}
.article-card .meta { font-size: 13px; color: var(--muted); margin-top: 6px; }
.badge {
  display: inline-block; font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 999px; margin-right: 6px; letter-spacing: .03em;
  background: var(--accent-soft); color: var(--accent-ink);
}
.badge.status-draft      { background: #f0eee2; color: #877327; }
.badge.status-review     { background: #e2eaf0; color: #2d5a87; }
.badge.status-accepted   { background: var(--good-soft); color: var(--good); }
.badge.status-superseded { background: var(--bad-soft); color: var(--bad); }

/* ── Article body (rendered markdown) ───────────────────────────── */
article.body {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 28px 32px; margin-bottom: 24px;
}
article.body > :first-child { margin-top: 0; }
article.body > :last-child { margin-bottom: 0; }
article.body h1, article.body h2, article.body h3, article.body h4 { line-height: 1.25; }
article.body h1 { font-size: 28px; margin-top: 32px; }
article.body h2 { font-size: 22px; margin-top: 28px; }
article.body h3 { font-size: 18px; margin-top: 22px; }
article.body code { background: var(--code-bg); padding: 2px 5px; border-radius: 4px; font-size: .9em; }
article.body pre {
  background: var(--code-bg); padding: 14px; border-radius: 8px;
  overflow-x: auto; border: 1px solid var(--line);
}
article.body pre code { background: transparent; padding: 0; }
article.body table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: 14px; }
article.body th, article.body td {
  border-bottom: 1px solid var(--line); padding: 8px 12px;
  text-align: left; vertical-align: top;
}
article.body th { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; }
article.body blockquote {
  border-left: 3px solid var(--accent); margin: 16px 0; padding: 4px 16px;
  background: var(--accent-soft); color: var(--accent-ink); border-radius: 0 6px 6px 0;
}
article.body a { color: var(--accent-ink); }

/* ── Actions, comments, forms, misc ─────────────────────────────── */
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 24px; }
.comments-section { margin-top: 32px; }
.comment {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 18px; margin-bottom: 10px;
}
.comment .meta { font-size: 12px; color: var(--faint); margin-bottom: 6px; }
.comment .body > :first-child { margin-top: 0; }
.comment .body > :last-child { margin-bottom: 0; }
form.add-comment textarea {
  width: 100%; min-height: 90px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px;
  font: inherit; resize: vertical; background: var(--panel);
}
form.add-comment .row { margin-top: 8px; display: flex; gap: 10px; justify-content: flex-end; }
.empty { color: var(--muted); font-style: italic; padding: 12px 0; }
.error {
  background: var(--bad-soft); color: var(--bad); border: 1px solid var(--bad);
  padding: 10px 14px; border-radius: 8px; margin: 16px 0; font-size: 14px;
}
.signin-screen { text-align: center; padding: 60px 20px; }
.signin-screen h2 { font-weight: 600; margin-bottom: 8px; }
.signin-screen p { color: var(--muted); }
.signin-screen .btn { margin-top: 24px; }
.crumb { font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.crumb a { color: var(--accent-ink); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

/* ── Mobile ─────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  article.body { padding: 20px 18px; }
  article.body h1 { font-size: 24px; }
  header.top h1 .small { display: none; }
}