/* ==========================================================================
   Add Bleed to PDF — "Clinical Blueprint" (frosted paper)
   Static site stylesheet. System font stacks only. No webfonts.
   ========================================================================== */

:root {
  --paper: #F4F6F8;
  --paper-raised: #FBFCFD;
  --grid-line: #DCE3EA;
  --ink: #12263A;
  --ink-soft: #3C5164;
  --ink-faint: #6B8098;
  --cyan: #0E7490;
  --cyan-dark: #0B5A70;
  --cyan-tint: #E3F1F4;
  --amber: #B5651D;
  --line: #C9D4DD;
  --line-strong: #9FB0BF;
  --danger: #9A3B3B;
  --radius: 3px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Consolas, "Roboto Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --grid-size: 24px;
  --maxw: 1180px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

a { color: var(--cyan-dark); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--cyan); }

::selection { background: var(--cyan-tint); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand:hover { color: var(--cyan-dark); }
.brand .mark { width: 26px; height: 26px; flex: none; }
.brand .brand-sub {
  display: block;
  font-family: var(--sans);
  font-weight: 400;
  font-size: 0.66rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}
.main-nav a:not(.btn) {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.main-nav a:not(.btn):hover { color: var(--cyan-dark); }

.nav-toggle {
  display: none;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  padding: 11px 20px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--cyan);
  color: #FFFFFF;
  border-color: var(--cyan-dark);
}
.btn-primary:hover { background: var(--cyan-dark); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan-dark); }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Crosshair / registration mark motif ---------- */
.reg-mark {
  display: inline-block;
  width: 14px;
  height: 14px;
  position: relative;
  flex: none;
}
.reg-mark::before, .reg-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}
.reg-mark::before { left: 50%; top: 0; width: 1px; height: 100%; transform: translateX(-50%); }
.reg-mark::after { top: 50%; left: 0; height: 1px; width: 100%; transform: translateY(-50%); }

/* ---------- Hero ---------- */
.hero {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
}
.hero .wrap { display: grid; gap: 28px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cyan-dark);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--cyan-tint);
  border: 1px dashed var(--cyan);
  border-radius: 999px;
  padding: 5px 12px 5px 10px;
  margin-bottom: 18px;
}
h1 {
  font-size: clamp(2rem, 4.4vw, 3rem);
  line-height: 1.12;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
  max-width: 22ch;
}
.hero .subhead {
  font-size: 1.13rem;
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 26px;
}
.hero-cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 14px; }
.trust-line {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.trust-line .sep { color: var(--line-strong); }

.hero-figure {
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  border-radius: var(--radius);
  padding: 18px;
}

/* ---------- Section scaffolding ---------- */
section { padding: 56px 0; }
section.alt { background: rgba(255,255,255,0.5); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 68ch; margin: 0 0 34px; }
.section-head .kicker {
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cyan-dark);
  margin: 0 0 8px;
}
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 10px; letter-spacing: -0.01em; }
.section-head p { color: var(--ink-soft); margin: 0; }

/* ---------- How it works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.step {
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
  position: relative;
}
.step .step-no {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--cyan-dark);
  border: 1px dashed var(--cyan);
  border-radius: 999px;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.step svg { margin-bottom: 12px; }
.step h3 { margin: 0 0 8px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: 0.94rem; }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.feature {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--paper-raised);
}
.feature h3 {
  font-size: 1rem;
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.feature p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- Calculator ---------- */
.calc-panel {
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  border-radius: var(--radius);
  padding: 28px;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 28px;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}
.field select, .field input {
  font: inherit;
  font-family: var(--mono);
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}
.field select:focus, .field input:focus { border-color: var(--cyan); }

.calc-output {
  margin-top: 24px;
  border: 1px dashed var(--cyan);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--cyan-tint);
}
.calc-output .out-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(14,116,144,0.18);
  font-size: 0.95rem;
}
.calc-output .out-row:last-child { border-bottom: none; }
.calc-output .out-label { color: var(--ink-soft); }
.calc-output .out-value { font-family: var(--mono); font-weight: 600; color: var(--ink); }
.calc-note { margin-top: 14px; font-size: 0.82rem; color: var(--ink-faint); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 78ch; }
details.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  margin-bottom: 12px;
  padding: 4px 20px;
}
details.faq-item summary {
  cursor: pointer;
  padding: 15px 0;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "+";
  font-family: var(--mono);
  font-size: 1.2rem;
  color: var(--cyan-dark);
  flex: none;
}
details.faq-item[open] summary::after { content: "\2212"; }
details.faq-item p { margin: 0 0 16px; color: var(--ink-soft); }

/* ---------- Blog cards ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.blog-card {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-raised);
  padding: 22px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 120ms ease, transform 120ms ease;
}
.blog-card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.blog-card .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cyan-dark);
  margin-bottom: 10px;
  display: block;
}
.blog-card h3 { margin: 0 0 8px; font-size: 1.08rem; line-height: 1.35; }
.blog-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }
.blog-card .read-more { margin-top: 12px; font-family: var(--mono); font-size: 0.82rem; color: var(--cyan-dark); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 30px;
  background: rgba(255,255,255,0.4);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 30px;
}
.footer-col h4 {
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-faint);
  margin: 0 0 14px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-col a { color: var(--ink-soft); text-decoration: none; font-size: 0.92rem; }
.footer-col a:hover { color: var(--cyan-dark); }
.footer-col p { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 14px; max-width: 34ch; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
}
.footer-bottom a { color: var(--ink-faint); }
.footer-bottom a:hover { color: var(--cyan-dark); }

/* ---------- Article layout ---------- */
.article-header { padding: 48px 0 24px; border-bottom: 1px solid var(--line); }
.breadcrumb {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-bottom: 18px;
}
.breadcrumb a { color: var(--ink-faint); }
.breadcrumb a:hover { color: var(--cyan-dark); }
.article-header h1 { max-width: 30ch; }
.byline {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--ink-faint);
  margin-top: 10px;
}

.article-body { padding: 40px 0 20px; }
.article-body .wrap { max-width: 780px; }
.article-body h2 { margin-top: 2.2em; scroll-margin-top: 90px; }
.article-body h3 { margin-top: 1.6em; font-size: 1.15rem; }
.article-body p { color: var(--ink-soft); margin: 0 0 1.1em; }
.article-body ul, .article-body ol { color: var(--ink-soft); margin: 0 0 1.2em; padding-left: 1.3em; }
.article-body li { margin-bottom: 0.4em; }
.article-body strong { color: var(--ink); }

.answer-block {
  border: 1px solid var(--cyan);
  border-left: 4px solid var(--cyan);
  background: var(--cyan-tint);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 0 0 2em;
  font-size: 1.02rem;
  color: var(--ink);
}
.answer-block .answer-tag {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--cyan-dark);
  margin-bottom: 8px;
}

figure {
  margin: 2em 0;
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  border-radius: var(--radius);
  padding: 18px;
}
figure svg { display: block; width: 100%; height: auto; }
figcaption {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-faint);
  margin-top: 12px;
  border-top: 1px dashed var(--line-strong);
  padding-top: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.92rem;
}
caption {
  text-align: left;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--line);
}
th {
  background: var(--paper);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}
tbody tr:nth-child(even) { background: rgba(255,255,255,0.5); }

blockquote {
  margin: 1.6em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--line-strong);
  color: var(--ink-soft);
  font-style: italic;
}

.cta-band {
  margin: 2.4em 0;
  border: 1px dashed var(--cyan);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--cyan-tint);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.cta-band p { margin: 0; color: var(--ink); font-weight: 500; max-width: 42ch; }

.faq-article { margin-top: 2.4em; }

.external-link-note {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin-top: 2.4em;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

/* ---------- Blog index ---------- */
.blog-index-header { padding: 56px 0 20px; border-bottom: 1px solid var(--line); }
.blog-index-header h1 { max-width: 24ch; }

/* ---------- 404 ---------- */
.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
}
.error-page .wrap { text-align: left; }
.error-code {
  font-family: var(--mono);
  font-size: 4.5rem;
  color: var(--cyan);
  margin: 0;
  line-height: 1;
}
.error-page h1 { margin-top: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .steps, .feature-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .calc-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav { position: fixed; inset: 60px 0 0 0; background: var(--paper); flex-direction: column; align-items: flex-start; padding: 24px 20px; gap: 18px; border-top: 1px solid var(--line); transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity 140ms ease, transform 140ms ease; }
  .main-nav.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .main-nav a.btn { width: 100%; }
  .nav-toggle { display: inline-flex; }
  .steps, .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  h1 { max-width: none; }
}

@media (max-width: 420px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 40px; }
  section { padding: 44px 0; }
}