/* ==========================================================================
   Bates Numbering PDF — "Frosted Glass Cathedral" (midnight utility)
   Deep midnight background, frosted glass panels, electric-green single CTA.
   System font stacks only. Mobile-first, WCAG AA contrast.
   ========================================================================== */

:root {
  --midnight: #0d1220;
  --midnight-deep: #090c16;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-strong: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glow: rgba(52, 211, 153, 0.18);
  --action: #34d399;
  --action-dark: #10b981;
  --text: #eef1f6;
  --text-muted: #c7cdd9;
  --text-dim: #8f97a8;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 9px;
  --maxw: 1180px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(52, 211, 153, 0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(90, 130, 255, 0.08), transparent 55%),
    var(--midnight);
  color: var(--text-muted);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

a { color: var(--action); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--action);
  outline-offset: 3px;
  border-radius: 4px;
}

h1, h2, h3, h4 {
  color: var(--text);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.1rem, 4.5vw + 1rem, 3.4rem); }
h2 { font-size: clamp(1.5rem, 2vw + 1rem, 2.1rem); margin-top: 2.6em; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Glass panel primitive ---------- */
.glass {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset, 0 30px 60px -30px rgba(0,0,0,0.6);
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 18, 32, 0.72);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; opacity: 0.9; }
.brand svg { width: 28px; height: 28px; }

.nav-links {
  display: none;
  align-items: center;
  gap: 26px;
}
.nav-links a:not(.btn) { color: var(--text-muted); font-size: 0.95rem; }
.nav-links a:not(.btn):hover { color: var(--text); }

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

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text);
  cursor: pointer;
}

@media (min-width: 860px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--glass-border);
  background: rgba(13, 18, 32, 0.96);
}
.mobile-menu.open { display: block; }
.mobile-menu .container { padding: 14px 24px 20px; display: flex; flex-direction: column; gap: 14px; }
.mobile-menu a:not(.btn) { color: var(--text-muted); font-size: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(180deg, var(--action) 0%, var(--action-dark) 100%);
  color: #06251a;
  box-shadow: 0 8px 24px -8px rgba(52, 211, 153, 0.55);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 12px 28px -8px rgba(52, 211, 153, 0.7); text-decoration: none; }
.btn-primary:active { transform: translateY(0); }
.btn-sm { padding: 9px 18px; font-size: 0.88rem; }
.btn-ghost {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text);
}
.btn-ghost:hover { background: var(--glass-strong); text-decoration: none; }

/* ---------- Hero ---------- */
.hero {
  padding: 84px 0 60px;
  text-align: center;
  position: relative;
}
.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--action);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero h1 { max-width: 820px; margin-left: auto; margin-right: auto; }
.hero .subhead {
  max-width: 620px;
  margin: 18px auto 30px;
  font-size: 1.12rem;
  color: var(--text-muted);
}
.hero .cta-row { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.trust-line {
  margin-top: 22px;
  font-size: 0.86rem;
  color: var(--text-dim);
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.trust-line span:not(:last-child)::after { content: "•"; margin-left: 10px; color: var(--glass-border); }

/* ---------- Sections ---------- */
main section { padding: 56px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 40px; }
.section-head p { color: var(--text-dim); }
.kicker {
  display: block;
  color: var(--action);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* ---------- How it works ---------- */
.steps {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
}
.step {
  padding: 28px 24px;
  position: relative;
}
.step .step-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--glow);
  border: 1px solid rgba(52,211,153,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.step .step-icon svg { width: 24px; height: 24px; }
.step .step-num {
  position: absolute;
  top: 22px;
  right: 24px;
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: 0.85rem;
}
.step h3 { margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 0.95rem; margin: 0; }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .feature-grid { grid-template-columns: repeat(3, 1fr); } }
.feature {
  padding: 24px;
}
.feature h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature p { color: var(--text-dim); font-size: 0.93rem; margin: 0; }
.feature .f-icon { color: var(--action); margin-bottom: 12px; }
.feature .f-icon svg { width: 22px; height: 22px; }

/* ---------- Calculator ---------- */
.calc-panel { padding: 32px; }
.calc-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
  margin-bottom: 24px;
}
@media (min-width: 720px) { .calc-grid { grid-template-columns: repeat(4, 1fr); } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.82rem; color: var(--text-dim); font-weight: 600; }
.field input {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 11px 13px;
  color: var(--text);
  font-size: 0.98rem;
  font-family: var(--font-mono);
}
.field input:focus { outline: 2px solid var(--action); outline-offset: 1px; }
.calc-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 22px; }

.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--glass-border); }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 480px; }
thead th {
  text-align: left;
  padding: 12px 16px;
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--glass-border);
}
tbody td {
  padding: 11px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: var(--text-muted);
  font-family: var(--font-mono);
}
tbody tr:last-child td { border-bottom: none; }
tbody td:first-child { font-family: var(--font-sans); color: var(--text); }
.calc-note { font-size: 0.85rem; color: var(--text-dim); margin-top: 14px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 820px; margin: 0 auto; }
details.faq-item {
  padding: 6px 22px;
  border-radius: var(--radius-md);
}
details.faq-item summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--action);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
details.faq-item[open] summary::after { transform: rotate(45deg); }
details.faq-item p { padding-bottom: 18px; margin: 0; color: var(--text-dim); font-size: 0.95rem; }

/* ---------- Blog cards ---------- */
.blog-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
.blog-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
}
.blog-card .tag {
  color: var(--action);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.blog-card h3 { font-size: 1.15rem; margin: 0; }
.blog-card p { color: var(--text-dim); font-size: 0.93rem; margin: 0; flex-grow: 1; }
.blog-card .read-more { font-size: 0.9rem; font-weight: 600; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--glass-border);
  margin-top: 60px;
  padding: 48px 0 32px;
}
.footer-grid {
  display: grid;
  gap: 28px;
  grid-template-columns: 1fr;
  margin-bottom: 32px;
}
@media (min-width: 700px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-brand { color: var(--text); font-weight: 700; margin-bottom: 10px; display: block; }
.footer-brand:hover { text-decoration: none; }
.site-footer p.desc { color: var(--text-dim); font-size: 0.9rem; max-width: 340px; }
.footer-col h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--text-muted); font-size: 0.92rem; }
.footer-col a:hover { color: var(--action); }
.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.83rem;
  color: var(--text-dim);
}
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--action); }

/* ---------- Article ---------- */
.article-hero { padding: 56px 0 20px; }
.breadcrumb { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--action); }
.article-hero h1 { max-width: 780px; }
.byline { color: var(--text-dim); font-size: 0.9rem; margin-top: 10px; }

.answer-block {
  padding: 24px 26px;
  margin: 28px 0 40px;
  border-left: 3px solid var(--action);
}
.answer-block p { margin: 0; color: var(--text); font-size: 1.02rem; }

.article-body { max-width: 760px; margin: 0 auto; padding-bottom: 20px; }
.article-body h2 { scroll-margin-top: 90px; }
.article-body h2:first-of-type { margin-top: 0.4em; }
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body li { margin-bottom: 8px; }
.article-body figure {
  margin: 30px 0;
  padding: 20px;
  border-radius: var(--radius-md);
}
.article-body figcaption {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 12px;
  text-align: center;
}
.article-body table { font-size: 0.88rem; }
.article-cta {
  margin: 44px 0;
  padding: 32px;
  text-align: center;
}
.article-cta h3 { margin-bottom: 8px; }
.article-cta p { color: var(--text-dim); margin-bottom: 20px; }
.article-body blockquote {
  border-left: 3px solid var(--glass-border);
  margin: 20px 0;
  padding: 4px 20px;
  color: var(--text-dim);
  font-style: italic;
}

/* ---------- 404 ---------- */
.error-hero { padding: 120px 0; text-align: center; }
.error-hero .code {
  font-family: var(--font-mono);
  font-size: 5rem;
  color: var(--action);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 10px;
}

/* ---------- utility ---------- */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.text-dim { color: var(--text-dim); }