/* FlightRadiation — NASA technical report aesthetic
   Palette: paper white, NASA blue, lunar gray, signal red
   Type: IBM Plex Mono for technical, Inter for body
*/

:root {
  --paper: #ffffff;
  --paper-tint: #f4f6f9;
  --rule: #c9d0d8;
  --rule-soft: #e3e7ec;
  --ink: #0b1320;
  --ink-soft: #424c5c;
  --lunar: #8a92a0;
  --lunar-deep: #3a4250;
  --nasa-blue: #0b3d91;
  --nasa-blue-deep: #062462;
  --signal-red: #fc3d21;
  --signal-amber: #ffb000;
  --ok-green: #1f8a3b;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-feature-settings: 'ss01', 'cv11';
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ============ MASTHEAD ============ */
.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
}
.meta-block {
  display: flex;
  align-items: baseline;
  gap: 18px;
}
.agency {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--nasa-blue);
}
.doc-id {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--lunar);
  letter-spacing: 0.1em;
}
.top-nav {
  display: flex;
  gap: 28px;
}
.top-nav a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .15s, border-color .15s;
}
.top-nav a:hover {
  color: var(--nasa-blue);
  border-color: var(--nasa-blue);
}

.rule-strip {
  display: flex;
  height: 6px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.rule-strip span {
  flex: 1;
  border-right: 1px solid var(--rule-soft);
}
.rule-strip span:nth-child(8n+1) { background: var(--nasa-blue); }
.rule-strip span:nth-child(13n+2) { background: var(--signal-red); }
.rule-strip span:nth-child(17n+3) { background: var(--lunar); }
.rule-strip span:last-child { border-right: 0; }

/* ============ HERO ============ */
.hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--rule);
}
.hero-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--signal-red);
  margin-bottom: 22px;
}
.hero h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(46px, 7vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.hero h1 .subhead {
  display: block;
  margin-top: 14px;
  font-weight: 400;
  font-size: clamp(24px, 3.2vw, 36px);
  letter-spacing: -0.01em;
  color: var(--ink-soft);
}
.lede {
  margin-top: 32px;
  max-width: 720px;
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.hero-cta {
  margin-top: 40px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-block;
  padding: 16px 28px;
  background: var(--nasa-blue);
  color: var(--paper);
  text-decoration: none;
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--nasa-blue);
  transition: background .15s, color .15s;
  position: relative;
}
.btn-primary:hover {
  background: var(--nasa-blue-deep);
  border-color: var(--nasa-blue-deep);
}
.btn-large {
  padding: 22px 36px;
  font-size: 14px;
}
.cta-note {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lunar);
}

.hero-stats {
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.hero-stats > div {
  padding: 20px 24px;
  border-right: 1px solid var(--rule-soft);
}
.hero-stats > div:last-child { border-right: 0; }
.hero-stats dt {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--lunar);
  margin-bottom: 8px;
}
.hero-stats dd {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

/* ============ DIAGRAM STRIP ============ */
.diagram-strip {
  background: var(--paper-tint);
  padding: 70px 0;
  border-bottom: 1px solid var(--rule);
}
.diagram {
  position: relative;
  border: 1px solid var(--rule);
  background: var(--paper);
  height: 380px;
  overflow: hidden;
}
.atmos-layer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  border-bottom: 1px dashed var(--rule);
  position: relative;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--lunar-deep);
}
.atmos-layer span { font-weight: 600; }
.atmos-layer em {
  font-style: normal;
  color: var(--lunar);
  font-size: 10px;
}
.layer-space    { height: 12%; background: #0b1320; color: #f4f6f9; }
.layer-space em { color: #8a92a0; }
.layer-meso     { height: 14%; background: #1a2540; color: #d9def0; }
.layer-meso em  { color: #9099b8; }
.layer-strato   { height: 20%; background: linear-gradient(180deg, #2c3e6e 0%, #4e6aa0 100%); color: #f4f6f9; }
.layer-strato em{ color: #d1d9ee; }
.layer-flight   { height: 14%; background: linear-gradient(180deg, #6e8bc4 0%, #98b3e0 100%); color: var(--nasa-blue-deep); border-top: 2px solid var(--signal-red); border-bottom: 2px solid var(--signal-red); position: relative; }
.layer-flight em{ color: var(--nasa-blue-deep); opacity: .8; }
.plane-mark {
  position: absolute;
  right: 38%;
  top: 50%;
  transform: translateY(-50%) rotate(-12deg);
  font-size: 22px;
  color: var(--signal-red);
}
.layer-tropo    { height: 28%; background: linear-gradient(180deg, #cad9f0 0%, #e6edf5 100%); }
.layer-ground   { height: 12%; background: #d9d9cf; color: var(--lunar-deep); border-bottom: 0; }

.ray {
  position: absolute;
  top: -8px;
  width: 1px;
  height: 360px;
  background: linear-gradient(180deg, rgba(252,61,33,0) 0%, rgba(252,61,33,0.7) 30%, rgba(252,61,33,0.3) 70%, rgba(252,61,33,0) 100%);
  transform-origin: top center;
}
.ray-1 { left: 18%; transform: rotate(8deg); }
.ray-2 { left: 38%; transform: rotate(-6deg); }
.ray-3 { left: 62%; transform: rotate(12deg); }
.ray-4 { left: 82%; transform: rotate(-9deg); }

.diagram-caption {
  margin-top: 18px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--lunar-deep);
  line-height: 1.6;
}

/* ============ SECTION HEAD ============ */
.section-head {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 32px;
  align-items: start;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 48px;
}
.section-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal-red);
  padding-top: 14px;
  border-top: 3px solid var(--signal-red);
}
.section-head h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: clamp(32px, 4vw, 46px);
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--ink);
}
.section-sub {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 680px;
}

/* ============ SAMPLE REPORT ============ */
.sample { padding: 90px 0; border-bottom: 1px solid var(--rule); }

.report-frame {
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 8px 8px 0 var(--rule-soft);
}
.report-header {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--ink);
}
.report-header > div {
  padding: 18px 22px;
  border-right: 1px solid var(--rule);
}
.report-header > div:last-child { border-right: 0; }
.rp-key {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--lunar);
  margin-bottom: 8px;
}
.rp-val {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.report-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--ink);
}
.report-col {
  padding: 36px 32px;
  border-right: 1px solid var(--rule);
  min-width: 0;
}
.report-col .rp-table { display: block; overflow-x: auto; }
.report-col:last-child { border-right: 0; }

.rp-h {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--nasa-blue);
  margin: 28px 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule-soft);
}
.report-col > .rp-h:first-child { margin-top: 0; }

.rp-p {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-bottom: 8px;
}
.rp-p strong { color: var(--ink); font-weight: 600; }

.rp-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
}
.rp-table th, .rp-table td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--rule-soft);
}
.rp-table th {
  color: var(--lunar);
  font-weight: 500;
  border-bottom: 1px solid var(--rule);
  letter-spacing: 0.06em;
}
.rp-table td:not(:first-child) { text-align: right; }
.rp-table.limits td:first-child { color: var(--ink-soft); }
.rp-table .lim { color: var(--ink); font-weight: 600; }

.dose-figure {
  margin: 8px 0 4px;
  padding: 22px 24px;
  background: var(--nasa-blue);
  color: var(--paper);
  position: relative;
}
.dose-figure::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--signal-red);
}
.dose-number {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}
.dose-number small {
  font-size: 18px;
  font-weight: 400;
  margin-left: 8px;
  color: rgba(255,255,255,0.7);
}
.dose-cap {
  margin-top: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.8);
}

.bar-chart {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}
.bar-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 14px;
  align-items: center;
}
.bar-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-soft);
}
.bar-track {
  position: relative;
  height: 22px;
  background: var(--paper-tint);
  border: 1px solid var(--rule);
}
.bar {
  height: 100%;
  position: relative;
}
.bar-subject { background: var(--signal-red); }
.bar-action  { background: var(--signal-amber); }
.bar-public  { background: var(--nasa-blue); }
.bar-bg      { background: var(--lunar); }
.bar-val {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: var(--ink);
  background: rgba(255,255,255,0.85);
  padding: 1px 5px;
  border-radius: 2px;
}

.report-footer {
  padding: 32px 32px 38px;
}
.rec-list {
  margin-top: 10px;
  padding-left: 22px;
}
.rec-list li {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
  padding: 8px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.rec-list li:last-child { border-bottom: 0; }

.report-cta {
  margin-top: 48px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

/* ============ METHOD ============ */
.method { padding: 90px 0; background: var(--paper-tint); border-bottom: 1px solid var(--rule); }

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.method-cell {
  padding: 36px 32px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.method-cell:nth-child(2n) { border-right: 0; }
.method-cell:nth-child(n+3) { border-bottom: 0; }
.cell-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--signal-red);
  margin-bottom: 14px;
}
.method-cell h4 {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--ink);
}
.method-cell p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ============ CTA BAND ============ */
.cta-band {
  background: var(--nasa-blue);
  color: var(--paper);
  padding: 64px 0;
  position: relative;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--signal-red);
}
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.cta-band p {
  margin-top: 10px;
  max-width: 540px;
  font-size: 15px;
  color: rgba(255,255,255,0.8);
}
.cta-band .btn-primary {
  background: var(--paper);
  color: var(--nasa-blue);
  border-color: var(--paper);
}
.cta-band .btn-primary:hover {
  background: var(--signal-red);
  color: var(--paper);
  border-color: var(--signal-red);
}

/* ============ FOOTER ============ */
.site-footer {
  padding: 60px 0 40px;
  background: var(--ink);
  color: var(--paper);
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
}
.foot-brand {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  letter-spacing: 0.18em;
  font-size: 14px;
  color: var(--paper);
  margin-bottom: 14px;
}
.foot-tag {
  font-size: 13px;
  color: var(--lunar);
  line-height: 1.6;
  max-width: 320px;
}
.foot-h {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--lunar);
  margin-bottom: 16px;
}
.foot-col a {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--paper);
  text-decoration: none;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
  transition: color .15s;
}
.foot-col a:hover { color: var(--signal-red); }
.foot-fine {
  margin-top: 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--lunar);
  letter-spacing: 0.1em;
  line-height: 1.6;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .container { padding: 0 22px; }
  .top-nav { gap: 16px; }
  .hero { padding: 50px 0 40px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats > div { border-bottom: 1px solid var(--rule-soft); }
  .hero-stats > div:nth-child(2) { border-right: 0; }
  .report-header { grid-template-columns: 1fr 1fr; }
  .report-header > div { border-bottom: 1px solid var(--rule); }
  .report-header > div:nth-child(2) { border-right: 0; }
  .report-body { grid-template-columns: minmax(0, 1fr); }
  .report-col { border-right: 0; border-bottom: 1px solid var(--rule); padding: 28px 20px; min-width: 0; }
  .report-frame { box-shadow: 4px 4px 0 var(--rule-soft); max-width: 100%; }
  .report-col:last-child { border-bottom: 0; }
  .method-grid { grid-template-columns: 1fr; }
  .method-cell { border-right: 0 !important; border-bottom: 1px solid var(--rule); }
  .method-cell:last-child { border-bottom: 0; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .section-head { grid-template-columns: 1fr; gap: 14px; }
  .section-num { padding-top: 10px; }
  .bar-row { grid-template-columns: 130px 1fr; }
  .diagram { height: 320px; }
  .cta-band-inner { flex-direction: column; align-items: flex-start; }
  .cta-band { padding: 48px 0; }
  .report-header > div { padding: 14px 18px; }
  .rp-val { font-size: 12px; }
  /* horizontal-scroll wrappers for tabular content */
  .rp-table, .article-body table.fact-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; }
  .rp-table thead, .rp-table tbody, .article-body table.fact-table thead, .article-body table.fact-table tbody { display: table; width: 100%; }
}

/* MOBILE — hamburger toggle */
.nav-toggle{
  display:none;
  width:48px;
  height:48px;
  background:transparent;
  border:0;
  cursor:pointer;
  padding:0;
  position:relative;
  align-items:center;
  justify-content:center;
  margin:-8px -8px -8px 0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:'';
  display:block;
  position:absolute;
  width:26px;
  height:2.5px;
  background:var(--ink);
  border-radius:2px;
  transition:transform .22s ease, opacity .18s ease;
}
.nav-toggle span{ top:50%; left:50%; transform:translate(-50%,-50%); }
.nav-toggle span::before{ top:-8px; left:0; }
.nav-toggle span::after{ top:8px; left:0; }
.nav-toggle[aria-expanded="true"] span{ background:transparent; }
.nav-toggle[aria-expanded="true"] span::before{ top:0; transform:rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after{ top:0; transform:rotate(-45deg); }

@media (max-width: 760px) {
  .masthead-inner { flex-wrap: wrap; align-items: center; padding: 16px 22px; row-gap: 0; }
  .meta-block { flex: 1 1 auto; }
  .nav-toggle { display: inline-flex; }
  .top-nav {
    display: none;
    flex-direction: column;
    gap: 0;
    width: 100%;
    order: 3;
    margin-top: 16px;
    border-top: 1px solid var(--rule);
  }
  .top-nav.open { display: flex; }
  .top-nav a {
    padding: 17px 4px;
    border-bottom: 1px solid var(--rule-soft);
    font-size: 14px;
    letter-spacing: 0.08em;
    min-height: 52px;
    display: flex;
    align-items: center;
    border-color: transparent transparent var(--rule-soft) transparent;
  }
  .top-nav a:last-child { border-bottom: 0; }
}

@media (max-width: 560px) {
  .meta-block { gap: 12px; }
  .doc-id { font-size: 10px; }
  .agency { font-size: 13px; }
  .hero { padding: 42px 0 34px; }
  .hero-label { margin-bottom: 16px; font-size: 10px; }
  .hero-stats { grid-template-columns: 1fr; margin-top: 44px; }
  .hero-stats > div { border-right: 0; border-bottom: 1px solid var(--rule-soft); padding: 16px 20px; }
  .hero-stats > div:last-child { border-bottom: 0; }
  .lede { font-size: 16px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .bar-row { grid-template-columns: 1fr; gap: 6px; }
  .bar-label { font-size: 10px; }
  .bar-track { margin-right: 0; }
  .bar-val { right: 6px; font-size: 10.5px; padding: 1px 4px; }
  .rp-h { white-space: normal; }
  .diagram-strip { padding: 44px 0; }
  .diagram { height: 260px; }
  .atmos-layer { font-size: 9px; padding: 0 14px; letter-spacing: 0.08em; }
  .atmos-layer em { font-size: 9px; }
  .layer-flight span { display: block; }
  .diagram-caption { font-size: 11px; }
  .sample { padding: 60px 0; }
  .method { padding: 60px 0; }
  .order-section { padding: 60px 0; }
  .section-head { padding-bottom: 24px; margin-bottom: 32px; }
  .method-cell { padding: 26px 22px; }
  .method-cell h4 { font-size: 19px; }
  .rp-h { font-size: 11px; margin: 22px 0 10px; }
  .rp-p { font-size: 13px; }
  .rp-table, .article-body table.fact-table { font-size: 12px; }
  .dose-number { font-size: 44px; }
  .dose-figure { padding: 18px 20px; }
  .cta-band h2 { font-size: 26px; }
  .cta-band .btn-large { padding: 18px 26px; font-size: 13px; }
  .btn-primary { padding: 14px 22px; font-size: 12px; letter-spacing: 0.12em; }
  .btn-large { padding: 18px 26px; font-size: 13px; }
  .report-cta { gap: 14px; }
  .report-cta .cta-note { font-size: 10px; }
  .cta-note { font-size: 10px; }
  .report-footer { padding: 24px 22px 30px; }
  .of-submit { flex-direction: column; align-items: stretch; gap: 14px; }
  .of-submit button { width: 100%; text-align: center; }
  .plane-mark { font-size: 18px; right: 30%; }
}

/* Extra-narrow (< 400px, e.g. iPhone SE / mini) */
@media (max-width: 400px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 40px; }
  .hero h1 .subhead { font-size: 22px; }
  .rp-val { font-size: 11px; }
  .rp-key { font-size: 9px; }
  .article-page h1 { font-size: 30px; }
  .doc-page h1 { font-size: 32px; }
  .article-lede { font-size: 17px; padding-left: 14px; }
  .article-body { font-size: 16px; }
  .article-body h2 { font-size: 22px; margin: 36px 0 12px; padding-top: 14px; }
  .doc-page h2 { font-size: 20px; margin: 36px 0 12px; padding-top: 14px; }
  .article-stamp { gap: 12px; font-size: 10px; }
  .article-crumb { font-size: 10px; }
  .article-cta { padding: 24px 20px; }
  .article-cta h3 { font-size: 19px; }
  .article-sources { padding: 20px; }
  .guide-card { padding: 24px 22px; }
  .guide-card h2 { font-size: 19px; }
  .doc-page { padding: 44px 0 70px; }
  .article-page { padding: 40px 0 70px; }
  .doc-callout { padding: 18px 20px; }
  .faq-list .faq-q { font-size: 16px; }
  .faq-list .faq-a { font-size: 14px; }
}

/* ============ ORDER FORM ============ */
.order-section {
  padding: 90px 0;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.orderform {
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 8px 8px 0 var(--rule-soft);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.of-row { display: block; }
.of-row.of-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.of-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.of-field.of-full { width: 100%; }
.of-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lunar);
}
.of-label em {
  font-style: normal;
  color: var(--lunar);
  opacity: 0.7;
  text-transform: none;
  letter-spacing: 0.04em;
  font-size: 10px;
  margin-left: 6px;
}
.orderform input[type="text"],
.orderform input[type="email"],
.orderform input[type="number"],
.orderform select {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 12px 14px;
  outline: none;
  transition: border-color .12s;
  letter-spacing: 0.02em;
}
.orderform input:focus,
.orderform select:focus {
  border-color: var(--nasa-blue);
  box-shadow: inset 0 -2px 0 var(--signal-red);
}
.orderform input[name="origin_iata"],
.orderform input[name="dest_iata"] {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 600;
}
.of-submit {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.of-submit button {
  cursor: pointer;
}
.order-status {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  padding: 10px 14px;
  border-left: 3px solid var(--lunar);
  background: var(--paper-tint);
  color: var(--ink-soft);
}
.order-status.err {
  border-left-color: var(--signal-red);
  background: #fff0ec;
  color: var(--ink);
}
@media (max-width: 700px) {
  .of-row.of-row-2 { grid-template-columns: 1fr; }
  .orderform { padding: 26px 22px; }
}

/* ---- blog layout (appended by scaffold) ---- */


/* === BLOG LAYOUT (added by scaffold_blogs_v2.py) ============================ */
/* Blog inherits all of the site's :root vars, body font, and h1/h2/p baselines. */
/* These classes add layout only — colour comes from the site's accent var.     */
.blog-wrap{max-width:46rem;margin:0 auto;padding:3.5rem 2rem 4rem;}
.blog-back{font-size:12px;letter-spacing:0.18em;text-transform:uppercase;color:var(--ink);text-decoration:none;font-weight:600;display:inline-block;margin-bottom:2rem;}
.blog-back:hover{text-decoration:underline;text-underline-offset:4px;}
.blog-kicker{font-size:11px;letter-spacing:0.28em;text-transform:uppercase;color:var(--ink);font-weight:600;}
.blog-h1{font-size:clamp(2.4rem,5vw,3.8rem);line-height:1.05;margin:0.6rem 0 1rem;letter-spacing:-0.02em;}
.blog-h1 em{color:var(--ink);}
.blog-intro{font-size:1.15rem;opacity:0.78;margin:0 0 2.5rem;max-width:34rem;}
.blog-pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:0 0 3rem;padding:1.5rem 0;border-top:1px solid currentColor;border-bottom:1px solid currentColor;border-color:rgba(0,0,0,0.12);}
.blog-pillar h3{font-size:11px;letter-spacing:0.22em;text-transform:uppercase;color:var(--ink);margin:0 0 0.3rem;font-weight:600;}
.blog-pillar p{font-size:13.5px;line-height:1.5;margin:0;opacity:0.78;}
.blog-list{margin:0;padding:0;list-style:none;}
.blog-post{padding:1.6rem 0;border-bottom:1px solid rgba(0,0,0,0.12);}
.blog-post:last-child{border-bottom:none;}
.blog-post .blog-meta{font-size:11px;letter-spacing:0.18em;text-transform:uppercase;opacity:0.55;}
.blog-post .blog-meta em{color:var(--ink);font-style:normal;font-weight:600;}
.blog-post h2{font-size:1.7rem;line-height:1.2;letter-spacing:-0.015em;margin:0.3rem 0 0.4rem;}
.blog-post h2 a{color:inherit;text-decoration:none;}
.blog-post h2 a:hover{color:var(--ink);}
.blog-post .blog-deck{margin:0;opacity:0.7;font-size:1rem;}
.blog-post.coming h2{opacity:0.6;}
.blog-subscribe{margin-top:3rem;padding:2rem;text-align:center;border:1px solid rgba(0,0,0,0.16);}
.blog-subscribe h3{font-size:1.3rem;margin:0 0 0.4rem;}
.blog-subscribe h3 em{color:var(--ink);}
.blog-subscribe form{display:inline-flex;gap:0.4rem;margin-top:0.6rem;flex-wrap:wrap;justify-content:center;}
.blog-subscribe input{padding:0.6rem 0.9rem;border:1px solid rgba(0,0,0,0.2);background:transparent;color:inherit;font:inherit;min-width:14rem;}
.blog-subscribe button{padding:0.6rem 1rem;border:none;background:var(--ink);color:#fff;font:inherit;font-weight:600;cursor:pointer;letter-spacing:0.04em;}
@media(max-width:700px){.blog-pillars{grid-template-columns:1fr;}}

/* Article layout for individual posts at /blog/<slug>/ */
.blog-article{max-width:38rem;margin:0 auto;padding:3rem 2rem 4rem;}
.blog-article .post-meta{font-size:11px;letter-spacing:0.18em;text-transform:uppercase;opacity:0.55;margin:0 0 0.6rem;}
.blog-article .post-meta em{color:var(--ink);font-style:normal;font-weight:600;}
.blog-article h1{font-size:clamp(2rem,4.5vw,3.2rem);line-height:1.1;letter-spacing:-0.02em;margin:0 0 1rem;max-width:none;}
.blog-article h1 em{color:var(--ink);}
.blog-article .post-deck{font-size:1.2rem;opacity:0.8;margin:0 0 2.5rem;line-height:1.5;font-style:italic;}
.blog-article .post-body{font-size:1.08rem;line-height:1.75;}
.blog-article .post-body p{margin:0 0 1.2rem;}
.blog-article .post-body h2{font-size:1.6rem;margin:2.5rem 0 0.8rem;letter-spacing:-0.015em;}
.blog-article .post-body h2 em{color:var(--ink);}
.blog-article .post-body h3{font-size:1.25rem;margin:2rem 0 0.6rem;}
.blog-article .post-body blockquote{margin:1.2rem 0;padding:0.8rem 1.2rem;border-left:3px solid var(--ink);font-style:italic;opacity:0.85;}
.blog-article .post-body code{font-family:ui-monospace,monospace;font-size:0.92em;padding:0.1em 0.3em;background:rgba(0,0,0,0.06);border-radius:3px;}
.blog-article .post-body pre{padding:1rem;border-radius:6px;overflow:auto;font-size:0.88em;line-height:1.55;background:rgba(0,0,0,0.85);color:#F8F4EE;}
.blog-article .post-body pre code{background:none;padding:0;}
.blog-article .post-body ul,.blog-article .post-body ol{padding-left:1.4rem;margin:0 0 1.2rem;}
.blog-article .post-body li{margin:0.4rem 0;}
.blog-article .post-body a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;}
.blog-article .post-cta{margin-top:3rem;padding:1.6rem;border:1px solid var(--ink);text-align:center;}
.blog-article .post-cta h3{margin:0 0 0.4rem;font-size:1.3rem;}
.blog-article .post-cta a.cta-btn{display:inline-block;margin-top:0.6rem;padding:0.7rem 1.4rem;background:var(--ink);color:#fff;text-decoration:none;font-weight:600;letter-spacing:0.04em;font-size:14px;}
.blog-article .post-nav{margin-top:3rem;padding-top:1rem;border-top:1px solid rgba(0,0,0,0.12);display:flex;justify-content:space-between;font-size:12px;letter-spacing:0.18em;text-transform:uppercase;}
.blog-article .post-nav a{color:inherit;text-decoration:none;opacity:0.7;}
.blog-article .post-nav a:hover{opacity:1;color:var(--ink);}

/* ============================================================
   ARTICLE + INFRASTRUCTURE PAGES (Tier 1 + Tier 2)
   Appended 2026-06-30 — matches NASA-blue / signal-red system
   ============================================================ */

/* ---- Generic content page wrapper ---- */
.doc-page { padding: 70px 0 100px; background: var(--paper); }
.doc-page .container { max-width: 880px; }

.doc-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--signal-red);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.doc-page h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 18px;
}
.doc-page .doc-lede {
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 680px;
  margin-bottom: 40px;
}
.doc-page h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 50px 0 16px;
  padding-top: 18px;
  border-top: 2px solid var(--nasa-blue);
  display: inline-block;
  padding-right: 18px;
}
.doc-page h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--nasa-blue);
  text-transform: uppercase;
  margin: 32px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule-soft);
}
.doc-page p, .doc-page li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.doc-page p { margin-bottom: 18px; }
.doc-page ul, .doc-page ol { margin: 0 0 22px 22px; }
.doc-page li { margin-bottom: 8px; }
.doc-page strong { color: var(--ink); font-weight: 600; }
.doc-page a {
  color: var(--nasa-blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.doc-page a:hover { color: var(--signal-red); }

.doc-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--lunar);
  padding: 14px 18px;
  background: var(--paper-tint);
  border-left: 3px solid var(--nasa-blue);
  margin-bottom: 36px;
  text-transform: uppercase;
}

.doc-callout {
  margin: 28px 0;
  padding: 22px 24px;
  background: var(--paper-tint);
  border-left: 4px solid var(--signal-red);
}
.doc-callout p:last-child { margin-bottom: 0; }
.doc-callout .callout-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--signal-red);
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}

/* ---- Source list ---- */
.source-list { list-style: none; margin-left: 0; }
.source-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 14.5px;
  line-height: 1.55;
}
.source-list li:last-child { border-bottom: 0; }
.source-list .src-title {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--nasa-blue);
  font-weight: 600;
  margin-bottom: 4px;
}
.source-list .src-pub {
  display: block;
  font-size: 12px;
  color: var(--lunar);
  font-family: 'IBM Plex Mono', monospace;
  margin-bottom: 6px;
}

/* ---- FAQ accordion-ish ---- */
.faq-list { list-style: none; margin-left: 0; }
.faq-list .faq-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}
.faq-list .faq-q {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.faq-list .faq-a {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.faq-list .faq-a p { margin-bottom: 10px; }
.faq-list .faq-a p:last-child { margin-bottom: 0; }

/* ---- Article (Tier 2) ---- */
.article-page { padding: 60px 0 90px; background: var(--paper); }
.article-page .container { max-width: 760px; }
.article-crumb {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lunar);
  text-transform: uppercase;
  margin-bottom: 26px;
}
.article-crumb a { color: var(--lunar); text-decoration: none; }
.article-crumb a:hover { color: var(--nasa-blue); }
.article-crumb span.sep { margin: 0 8px; color: var(--rule); }

.article-page h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 22px;
}

.article-stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  padding: 14px 0;
  margin-bottom: 32px;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lunar);
  text-transform: uppercase;
}
.article-stamp span strong { color: var(--ink); font-weight: 600; margin-left: 6px; }

.article-lede {
  font-family: 'Inter', sans-serif;
  font-size: 20px;
  line-height: 1.55;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 36px;
  padding-left: 18px;
  border-left: 3px solid var(--signal-red);
}

.article-body { font-size: 17px; line-height: 1.72; color: var(--ink-soft); }
.article-body p { margin-bottom: 20px; }
.article-body h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 50px 0 16px;
  padding-top: 18px;
  border-top: 2px solid var(--nasa-blue);
  display: inline-block;
  padding-right: 14px;
}
.article-body h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--nasa-blue);
  text-transform: uppercase;
  margin: 30px 0 12px;
}
.article-body strong { color: var(--ink); font-weight: 600; }
.article-body em { font-style: italic; }
.article-body a {
  color: var(--nasa-blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--signal-red); }
.article-body ul, .article-body ol { margin: 0 0 22px 22px; }
.article-body li { margin-bottom: 8px; }

.article-body table.fact-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
}
.article-body table.fact-table th,
.article-body table.fact-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.article-body table.fact-table th {
  background: var(--paper-tint);
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.article-body table.fact-table td.num,
.article-body table.fact-table th.num { text-align: right; font-variant-numeric: tabular-nums; }

.article-body blockquote {
  margin: 26px 0;
  padding: 18px 22px;
  background: var(--paper-tint);
  border-left: 3px solid var(--nasa-blue);
  font-size: 16px;
  color: var(--ink);
}

.source-cite {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--nasa-blue);
  margin-left: 2px;
  vertical-align: super;
  line-height: 1;
}

.article-footer-block {
  margin-top: 50px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}
.article-sources {
  margin: 36px 0;
  padding: 24px;
  background: var(--paper-tint);
  border: 1px solid var(--rule);
}
.article-sources h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--signal-red);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.article-sources ol { margin-left: 22px; }
.article-sources li {
  font-size: 13.5px;
  line-height: 1.55;
  margin-bottom: 10px;
  color: var(--ink-soft);
}
.article-sources li a { color: var(--nasa-blue); }

.article-reviewed {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lunar);
  text-transform: uppercase;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-soft);
}

.article-cta {
  margin-top: 44px;
  padding: 32px;
  background: var(--nasa-blue);
  color: var(--paper);
  position: relative;
}
.article-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--signal-red);
}
.article-cta h3 {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  border: 0;
  padding: 0;
  text-transform: none;
}
.article-cta p {
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 18px;
}
.article-cta .btn-primary {
  background: var(--paper);
  color: var(--nasa-blue);
  border-color: var(--paper);
}
.article-cta .btn-primary:hover {
  background: var(--signal-red);
  color: var(--paper);
  border-color: var(--signal-red);
}

.article-related {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--rule);
}
.article-related h3 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-red);
  margin-bottom: 18px;
}
.article-related ul { list-style: none; margin: 0; }
.article-related li {
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-soft);
}
.article-related a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
}
.article-related a:hover { color: var(--nasa-blue); }

/* ---- Guide hub index ---- */
.guide-hub { padding: 70px 0 90px; background: var(--paper); }
.guide-hub .container { max-width: 1080px; }
.guide-hub h1 {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
  color: var(--ink);
}
.guide-hub .hub-lede {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 680px;
  margin-bottom: 50px;
  line-height: 1.6;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--rule);
}
.guide-card {
  padding: 32px 28px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  transition: background .15s;
  background: var(--paper);
}
.guide-card:hover { background: var(--paper-tint); }
.guide-card .gc-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal-red);
  margin-bottom: 14px;
}
.guide-card h2 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.015em;
  margin-bottom: 10px;
  line-height: 1.18;
  color: var(--ink);
  border: 0;
  padding: 0;
}
.guide-card p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 14px;
  flex-grow: 1;
}
.guide-card .gc-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--lunar);
  text-transform: uppercase;
  margin-top: auto;
}

@media (max-width: 800px) {
  .guide-grid { grid-template-columns: 1fr; }
  .article-page .container, .doc-page .container { padding: 0 22px; }
  .article-body table.fact-table { font-size: 11.5px; }
}

/* --- HORIZONTAL OVERFLOW GUARDS (mobile hardening) --- */
html, body { overflow-x: hidden; max-width: 100vw; }
img, svg, video, table { max-width: 100%; height: auto; }
.container { max-width: min(1120px, 100vw); box-sizing: border-box; }
section { max-width: 100vw; overflow-x: clip; }
/* Section header numbers stack under H3 on mobile so they don't waste width */
@media (max-width: 480px) {
  .rp-h { display: block; }
  .rp-h::first-line { line-height: 1.2; }
}