/* Galois Field Limited — magazine layout, HK business light */
:root {
  --paper: #f7f8fb;
  --wash: #f1f5ff; /* cool light blue */
  --tint: rgba(31, 75, 143, 0.06);
  --tint-2: rgba(15, 118, 110, 0.06);
  --wash-blue: #edf3ff;
  --wash-teal: #eefaf7;
  --wash-ink: rgba(31, 41, 55, 0.03);
  --ink: #1f2937;
  --ink-2: rgba(31, 41, 55, 0.72);
  --hairline: rgba(31, 41, 55, 0.20);
  --hairline-2: rgba(31, 41, 55, 0.12);
  --accent: #1f4b8f; /* HK business blue */
  --accent-2: #0f766e; /* muted teal */
  --radius: 12px;
  --container: 1080px;
  --measure: 68ch;
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, "Noto Sans";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='44' height='44' viewBox='0 0 44 44'%3E%3Cg fill='none'%3E%3Cpath d='M0 .5H44' stroke='%231f2937' stroke-opacity='.05'/%3E%3Cpath d='M.5 0V44' stroke='%231f2937' stroke-opacity='.05'/%3E%3Ccircle cx='22' cy='22' r='1' fill='%231f4b8f' fill-opacity='.08'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 44px 44px;
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible {
  outline: 2px solid rgba(31, 75, 143, 0.35);
  outline-offset: 3px;
  border-radius: 6px;
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.measure {
  max-width: var(--measure);
}

.rule {
  height: 1px;
  background: var(--hairline-2);
  border: 0;
  margin: 26px 0;
}

/* Soft divider that avoids any “banding” or hard transitions. */
.rule.is-soft {
  height: 14px;
  margin: 22px 0;
  background: rgba(31, 41, 55, 0.02);
  border-top: 1px solid var(--hairline-2);
  border-bottom: 1px solid rgba(31, 41, 55, 0.06);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--hairline);
  border-radius: 10px;
}

.skip-link:focus {
  left: 10px;
  z-index: 1000;
}

/* Header: no sticky blur, keep it paper-like */
.site-header {
  background: rgba(241, 245, 255, 0.78);
  border-bottom: 1px solid var(--hairline-2);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}

.wordmark strong {
  font-weight: 750;
  letter-spacing: -0.02em;
}

.wordmark span {
  font-weight: 650;
  color: var(--ink-2);
}

/* Mobile nav: <details> disclosure (structure difference) */
.nav-disclosure {
  position: relative;
}

.nav-disclosure summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
  border: 1px solid var(--hairline);
  background: rgba(241, 245, 255, 0.72);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-disclosure summary::-webkit-details-marker {
  display: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-link {
  padding: 6px 8px;
  border-bottom: 1px solid transparent;
  color: rgba(17, 24, 39, 0.82);
}

.nav-link.is-active {
  border-bottom-color: rgba(31, 75, 143, 0.55);
  color: var(--ink);
}

.nav-link:hover {
  text-decoration: none;
  color: var(--accent);
}

/* Page blocks */
.page {
  padding: 46px 0 54px;
}

.kicker {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.62);
  margin: 0 0 10px;
  font-family: var(--mono);
}

.title {
  margin: 0 0 12px;
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.subtitle {
  margin: 0;
  color: var(--ink-2);
  max-width: var(--measure);
}

.lede {
  margin: 18px 0 0;
  color: var(--ink-2);
  max-width: var(--measure);
}

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
  align-items: start;
}

.quote {
  margin: 0;
  padding: 16px 16px;
  border-left: 3px solid rgba(31, 75, 143, 0.42);
  background: var(--tint);
  border-top: 1px solid rgba(31, 75, 143, 0.12);
  border-bottom: 1px solid rgba(31, 75, 143, 0.10);
}

.quote p {
  margin: 0 0 10px;
  color: rgba(17, 24, 39, 0.86);
  font-size: 15px;
}

.quote footer {
  color: rgba(17, 24, 39, 0.62);
  font-weight: 650;
  font-size: 13px;
}

.caps {
  font-variant-caps: all-small-caps;
  letter-spacing: 0.08em;
}

.section {
  padding: 10px 0 0;
}

.band {
  padding: 18px 18px;
  border-radius: var(--radius);
  border: 1px solid rgba(31, 41, 55, 0.12);
}

.band-blue {
  background: var(--wash-blue);
  border-color: rgba(31, 75, 143, 0.18);
}

.band-teal {
  background: var(--wash-teal);
  border-color: rgba(15, 118, 110, 0.18);
}

.band-ink {
  background: var(--wash-ink);
  border-color: rgba(31, 41, 55, 0.14);
}

.h2 {
  margin: 0 0 10px;
  font-size: 18px;
  letter-spacing: -0.01em;
  position: relative;
}

.h2::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  border-radius: 999px;
  background: rgba(31, 75, 143, 0.55);
  margin-top: 8px;
}

.legal-doc .h2 {
  margin-top: 28px;
}

.legal-doc .h2:first-child {
  margin-top: 0;
}

.legal-doc .h3 {
  margin: 22px 0 8px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.legal-doc .h2 + .lede,
.legal-doc .h3 + .lede {
  margin-top: 8px;
}

.legal-doc .lede {
  margin-top: 12px;
}

.legal-list {
  margin: 12px 0 0;
  padding-left: 1.35em;
  color: var(--ink-2);
  max-width: var(--measure);
}

.legal-list li {
  margin-top: 8px;
}

.legal-list li:first-child {
  margin-top: 0;
}

.fine {
  color: rgba(17, 24, 39, 0.62);
  font-size: 13px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.feature {
  padding: 10px 0;
  border-top: 1px solid var(--hairline-2);
}

.feature strong {
  display: block;
  font-weight: 750;
}

.feature span {
  display: block;
  color: var(--ink-2);
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--hairline);
  background: rgba(241, 245, 255, 0.82);
  font-size: 13px;
  font-family: var(--mono);
}

.pill a {
  color: var(--accent);
  font-weight: 750;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(31, 41, 55, 0.18);
  background: rgba(255, 255, 255, 0.80);
  font-weight: 750;
  color: rgba(31, 75, 143, 0.98);
}

.btn:hover {
  text-decoration: none;
  background: rgba(31, 75, 143, 0.12);
  border-color: rgba(31, 75, 143, 0.24);
}

.btn-primary {
  background: rgba(31, 75, 143, 0.16);
  border-color: rgba(31, 75, 143, 0.34);
  color: rgba(31, 75, 143, 1);
}

.btn-primary:hover {
  background: rgba(31, 75, 143, 0.22);
}

.btn-secondary {
  background: rgba(15, 118, 110, 0.10);
  border-color: rgba(15, 118, 110, 0.22);
  color: rgba(15, 118, 110, 0.98);
}

.btn-secondary:hover {
  background: rgba(15, 118, 110, 0.14);
}

.site-footer {
  padding: 28px 0 42px;
  border-top: 1px solid var(--hairline-2);
  background: rgba(241, 245, 255, 0.60);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 18px;
  align-items: start;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
}

.muted {
  color: var(--ink-2);
  margin: 10px 0 0;
}

/* Responsive */
@media (max-width: 900px) {
  .two-col {
    grid-template-columns: 1fr;
  }
  .feature-list {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }

  .nav-disclosure[open] .nav-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    position: absolute;
    right: 0;
    top: 46px;
    min-width: 180px;
    padding: 12px 12px;
    border: 1px solid var(--hairline);
    background: rgba(246, 245, 241, 0.98);
    border-radius: var(--radius);
  }
}