/* China Credit Brief — Phase 0 site stylesheet.
   Self-contained: system font stacks only, no external fonts/images/CDN.
   Palette: paper off-white, ink navy, one hairline gold accent. */

:root {
  --paper: #faf9f6;
  --paper-deep: #f2efe9;
  --ink: #1b1f24;
  --muted: #5d6470;
  --hairline: #e2ded5;
  --navy: #173a5e;
  --navy-deep: #0f2a46;
  --gold: #a8842c;
  --amber-bg: #fdf6e7;
  --amber-edge: #c9a04e;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", "Songti SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, .wordmark {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.01em;
}

a { color: var(--navy); }
a:hover { color: var(--navy-deep); }

/* ---------- header / footer chrome ---------- */

.site-header {
  border-bottom: 1px solid var(--hairline);
  background: rgba(250, 249, 246, 0.96);
}

.header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.wordmark {
  font-size: 19px;
  color: var(--navy);
  text-decoration: none;
}

.header-nav a {
  margin-left: 22px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
}

.header-nav a:hover { color: var(--navy); }

.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--hairline);
  background: var(--paper-deep);
  color: var(--muted);
  font-size: 13.5px;
}

.site-footer .wrap {
  padding-top: 26px;
  padding-bottom: 34px;
}

.site-footer p { margin: 0 0 10px; }

.footer-links a { color: var(--navy); }

/* ---------- landing: hero ---------- */

.hero {
  padding: 84px 0 56px;
  max-width: 820px;
}

.eyebrow {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 18px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.18;
  margin: 0 0 22px;
  color: var(--ink);
}

.hero .lede {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 30px;
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 3px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--navy);
}

.btn-primary {
  background: var(--navy);
  color: #fff;
}

.btn-primary:hover { background: var(--navy-deep); color: #fff; }

.btn-ghost {
  background: transparent;
  color: var(--navy);
}

.btn-ghost:hover { background: var(--paper-deep); }

/* ---------- landing: honest scope strip ---------- */

.scope-strip {
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  background: var(--paper-deep);
  padding: 20px 0;
}

.scope-strip p {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
}

.scope-strip .scope-label {
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12.5px;
  margin-right: 10px;
}

/* ---------- landing: sections ---------- */

section { padding: 56px 0 8px; }

section > h2 {
  font-size: 27px;
  margin: 0 0 10px;
}

.section-sub {
  color: var(--muted);
  max-width: 720px;
  margin: 0 0 30px;
}

/* value cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--navy);
  background: #fffdf9;
  padding: 24px 22px 20px;
}

.card-num {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
  display: block;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 18px;
  margin: 0 0 10px;
}

.card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

/* sample library */

.samples-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.sample-card {
  border: 1px solid var(--hairline);
  background: #fffdf9;
  padding: 24px 22px 20px;
  display: flex;
  flex-direction: column;
}

.sample-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
}

.sample-card h3 {
  font-size: 20px;
  margin: 0 0 8px;
}

.sample-ticker {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 14px;
  margin: 0 0 12px;
}

.sample-card p {
  font-size: 14.5px;
  color: var(--muted);
  margin: 0 0 16px;
  flex-grow: 1;
}

.sample-card .read-link {
  font-weight: 600;
  font-size: 14.5px;
  text-decoration: none;
}

.sample-card .read-link:hover { text-decoration: underline; }

/* transparency */

.transparency-callout {
  border-left: 3px solid var(--gold);
  background: var(--amber-bg);
  padding: 26px 28px;
}

.transparency-callout h2 { margin-top: 0; }

.transparency-callout .section-sub { margin-bottom: 22px; }

.t-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

/* ---------- access / email form ---------- */

.access-box {
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--gold);
  background: #fffdf9;
  padding: 34px 32px 30px;
  max-width: 640px;
}

.access-box h2 { margin-top: 0; }

.access-box .section-sub { margin-bottom: 24px; }

.access-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.access-form label {
  flex-basis: 100%;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
}

.access-form input[type="email"] {
  flex: 1 1 260px;
  padding: 11px 14px;
  font-size: 15px;
  font-family: var(--sans);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  background: #fff;
  color: var(--ink);
}

.access-form input[type="email"]:focus {
  outline: 2px solid var(--navy);
  outline-offset: -1px;
}

.access-form .btn { border: 0; cursor: pointer; }

.form-note {
  font-size: 13px;
  color: var(--muted);
  margin: 14px 0 0;
}

.form-fallback {
  border: 1px solid var(--amber-edge);
  background: var(--amber-bg);
  padding: 16px 18px;
  font-size: 14.5px;
}

.form-fallback p { margin: 0 0 8px; }
.form-fallback p:last-child { margin-bottom: 0; }

/* ---------- brief pages ---------- */

.brief-page main { padding-top: 34px; }

.meta-strip {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.pill {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
  border: 1px solid var(--navy);
  border-radius: 2px;
  padding: 3px 9px;
}

.meta-ticker {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--gold);
}

.meta-note { font-size: 13px; color: var(--muted); }

.notice-banner {
  border-left: 4px solid var(--amber-edge);
  background: var(--amber-bg);
  padding: 20px 24px;
  font-size: 15px;
  margin-bottom: 30px;
}

/* ---------- brief body (markdown output) ---------- */

.prose { max-width: 900px; }

.prose h1 {
  font-size: 31px;
  line-height: 1.25;
  margin: 6px 0 14px;
}

.prose h2 {
  font-size: 23px;
  margin: 44px 0 12px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline);
}

.prose p, .prose li { font-size: 15.5px; }

.prose ul, .prose ol { padding-left: 24px; }

.prose li { margin-bottom: 7px; }

.prose li > ul { margin-top: 7px; }

.prose blockquote {
  margin: 18px 0;
  padding: 14px 20px;
  border-left: 3px solid var(--navy);
  background: var(--paper-deep);
  color: var(--ink);
  font-size: 14.5px;
}

.prose blockquote p { margin: 0 0 8px; }
.prose blockquote p:last-child { margin-bottom: 0; }

.prose hr {
  border: 0;
  border-top: 1px solid var(--hairline);
  margin: 40px 0 18px;
}

.prose code {
  font-family: "SF Mono", Menlo, Consolas, "Courier New", monospace;
  font-size: 0.86em;
  background: var(--paper-deep);
  border: 1px solid var(--hairline);
  border-radius: 2px;
  padding: 1px 4px;
}

.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
}

.table-scroll {
  overflow-x: auto;
  margin: 14px 0 22px;
  border: 1px solid var(--hairline);
}

.prose th, .prose td {
  border-bottom: 1px solid var(--hairline);
  padding: 7px 11px;
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}

.prose thead th {
  background: var(--paper-deep);
  font-family: var(--serif);
  font-size: 13px;
  border-bottom: 2px solid var(--navy);
}

.prose tbody tr:nth-child(even) { background: #fbfaf7; }

.prose tbody tr:last-child td { border-bottom: 0; }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .samples-grid, .t-cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 31px; }
  .hero { padding-top: 56px; }
  .header-nav a { margin-left: 14px; }
}

/* ---------- honeypot + form states ---------- */

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.form-success { color: var(--navy); font-weight: 600; }
.form-error { color: #9a3b26; font-weight: 600; }