/* siptilsend.org — shared stylesheet */

:root {
  --ink: #1A2B3A;
  --ink-soft: #4A5E73;
  --ink-mute: #7A8A9A;
  --paper: #FCFBF8;
  --paper-alt: #F2EFE8;
  --rule: rgba(26, 43, 58, 0.14);
  --rule-soft: rgba(26, 43, 58, 0.08);
  --accent: #1F5673;
  --ongoing: #B8823A;
  --caution: #9A4A2E;
  --max: 760px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

a { color: var(--accent); }

h1, h2, h3, h4 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
}

/* NAV */
nav {
  padding: 20px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: 'Source Serif 4', serif;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
}

.logo-mark { width: 20px; height: 20px; flex-shrink: 0; }
.logo-mark svg { width: 100%; height: 100%; }
.logo .dot { color: var(--ink-mute); }

.nav-links {
  display: flex;
  gap: 26px;
  align-items: center;
  font-size: 14px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
}

.nav-links a:hover { color: var(--accent); }
.nav-links a.active { font-weight: 600; border-bottom: 2px solid var(--ink); padding-bottom: 2px; }

/* LAYOUT */
main { max-width: 900px; margin: 0 auto; padding: 0 32px; }

.page-header {
  padding: 48px 0 28px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 36px;
}

.kicker {
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-mute);
  margin-bottom: 14px;
  font-weight: 600;
}

h1.page-title {
  font-size: 34px;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 15.5px;
  color: var(--ink-soft);
  max-width: var(--max);
}

section { margin-bottom: 44px; }

h2.section-title {
  font-size: 21px;
  margin-bottom: 16px;
}

p { max-width: var(--max); }
p + p { margin-top: 12px; }

.lead p { font-size: 16px; }

/* HOME HERO */
.hero { padding: 44px 0 36px; max-width: var(--max); }
.hero h1 { font-size: 36px; letter-spacing: -0.015em; margin-bottom: 14px; }
.hero .sub { font-size: 16.5px; color: var(--ink-soft); }

/* DEFINITION / FACT LIST */
.fact-block p { font-size: 15.5px; margin-bottom: 12px; }
.fact-block p.muted { color: var(--ink-soft); font-size: 14.5px; }

/* REGIMEN COMPARISON */
.regimen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.regimen-card {
  border: 1px solid var(--rule);
  padding: 18px;
}

.regimen-card h4 { font-size: 15.5px; margin-bottom: 3px; }
.regimen-card .rule-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
.regimen-card p { font-size: 13.5px; color: var(--ink-soft); }

/* TIMELINE */
.tl { list-style: none; }

.tl-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--rule-soft);
}
.tl-row:last-child { border-bottom: 1px solid var(--rule-soft); }

.tl-year {
  font-size: 13px;
  color: var(--ink-mute);
  font-weight: 600;
  padding-top: 1px;
}

.tl-content h4 { font-size: 15px; margin-bottom: 2px; }
.tl-content p { font-size: 13.5px; color: var(--ink-soft); }

/* PAPER LIST */
.paper-section-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 8px;
}
.paper-section-heading h2 { font-size: 19px; }
.paper-section-heading .hint {
  font-size: 11.5px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.paper {
  padding: 16px 0;
  border-top: 1px solid var(--rule-soft);
}
.paper:last-child { border-bottom: 1px solid var(--rule-soft); }

.paper.ongoing {
  border-left: 3px solid var(--ongoing);
  padding-left: 14px;
}

.paper.caution {
  border-left: 3px solid var(--caution);
  padding-left: 14px;
}

.paper-meta {
  font-size: 12px;
  color: var(--ink-mute);
  margin-bottom: 4px;
}
.paper-meta .journal { color: var(--ink); font-weight: 600; }
.paper-meta .status-tag {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 10.5px;
}
.status-tag.ongoing { color: var(--ongoing); }
.status-tag.caution { color: var(--caution); }

.paper h4 { font-size: 15.5px; line-height: 1.35; margin-bottom: 3px; }
.paper .authors { font-size: 13px; color: var(--ink-mute); font-style: italic; margin-bottom: 6px; }
.paper .design {
  font-size: 11px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}
.paper .summary { font-size: 14px; color: var(--ink-soft); line-height: 1.55; }
.paper .summary strong { color: var(--ink); font-weight: 600; }
.paper .link-row { margin-top: 8px; }
.paper .link-row a { font-size: 12.5px; text-decoration: underline; text-underline-offset: 2px; }

/* GUIDELINES TABLE-LIKE ROWS */
.g-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-top: 1px solid var(--rule-soft);
}
.g-row:last-child { border-bottom: 1px solid var(--rule-soft); }
.g-body-label { font-weight: 600; font-size: 13.5px; }
.g-region { font-size: 11.5px; color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 2px; }
.g-title { font-size: 15px; font-weight: 500; line-height: 1.4; }
.g-meta { font-size: 13px; color: var(--ink-mute); margin-top: 3px; }
.g-row a { font-size: 12.5px; text-decoration: underline; text-underline-offset: 2px; }

/* CASE STUDIES (implementation) */
.case {
  padding: 18px 0;
  border-top: 1px solid var(--rule-soft);
}
.case:last-child { border-bottom: 1px solid var(--rule-soft); }
.case-header { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 4px; flex-wrap: wrap; }
.case-site { font-size: 12px; color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }
.case-year { font-size: 12px; color: var(--ink-mute); }
.case h4 { font-size: 15.5px; margin-bottom: 8px; }
.case-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 13px;
  margin-bottom: 8px;
}
.case-meta-grid span { color: var(--ink-mute); }
.case-body { font-size: 14px; color: var(--ink-soft); margin-bottom: 6px; }
.case a { font-size: 12.5px; text-decoration: underline; text-underline-offset: 2px; }

/* FEED */
.feed-controls { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.feed-chip {
  padding: 6px 12px;
  background: var(--paper-alt);
  border: 1px solid var(--rule);
  font-size: 12.5px;
  color: var(--ink-soft);
  cursor: pointer;
}
.feed-chip.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.feed-status {
  font-size: 12.5px;
  color: var(--ink-mute);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
.pulse { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }

.feed-item { padding: 14px 0; border-bottom: 1px solid var(--rule-soft); }
.feed-date { font-size: 12px; color: var(--ink-mute); margin-bottom: 3px; }
.feed-item h4 { font-size: 15px; line-height: 1.4; margin-bottom: 3px; }
.feed-item h4 a { color: var(--ink); text-decoration: none; }
.feed-item h4 a:hover { color: var(--accent); }
.feed-item .authors { font-size: 13px; color: var(--ink-mute); font-style: italic; }
.feed-item .pubtype {
  display: inline-block;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  margin-left: 6px;
  padding: 1px 6px;
  background: var(--paper-alt);
}

.feed-note, .note-box {
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--paper-alt);
  font-size: 13.5px;
  color: var(--ink-soft);
  border-left: 2px solid var(--ink-mute);
}
.feed-note strong, .note-box strong { color: var(--ink); font-weight: 600; }

/* DISCLAIMER */
.disclaimer {
  padding: 24px 0;
  border-top: 1px solid var(--rule);
  margin-top: 56px;
}
.disclaimer-tag {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
  font-weight: 600;
}
.disclaimer p { font-size: 13px; line-height: 1.6; color: var(--ink-soft); max-width: 820px; margin-bottom: 6px; }

footer {
  padding: 20px 0 40px;
  font-size: 12.5px;
  color: var(--ink-mute);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-right { display: flex; gap: 18px; }
.footer-right a { color: var(--ink-mute); text-decoration: none; }
.footer-right a:hover { color: var(--accent); }

@media (max-width: 640px) {
  .regimen-grid { grid-template-columns: 1fr; }
  .tl-row { grid-template-columns: 1fr; gap: 4px; }
  .g-row { grid-template-columns: 1fr; gap: 6px; }
  .case-meta-grid { grid-template-columns: 1fr; }
  h1.page-title { font-size: 28px; }
  .hero h1 { font-size: 28px; }
}