:root {
  --ivp-navy: #012853;
  --ivp-navy-deep: #001b3d;
  --ivp-teal: #0aa6b2;
  --ivp-bg: #f6fafc;
  --ivp-card: #ffffff;
  --ivp-text: #0b1f33;
  --ivp-muted: #536675;
  --ivp-border: #d7e2e8;
  --ivp-radius: 16px;
  --ivp-max: 920px;
  --ivp-font: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--ivp-font);
  color: var(--ivp-text);
  background:
    radial-gradient(1200px 480px at 10% -10%, rgba(10, 166, 178, 0.14), transparent 60%),
    radial-gradient(900px 420px at 100% 0%, rgba(1, 40, 83, 0.10), transparent 55%),
    var(--ivp-bg);
  line-height: 1.55;
}

a { color: var(--ivp-teal); }
a:hover { color: var(--ivp-navy); }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ivp-navy);
  color: #fff;
  padding: 8px 12px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

.site-header {
  background: linear-gradient(135deg, var(--ivp-navy-deep), var(--ivp-navy) 55%, #03407a);
  color: #fff;
  padding: 20px 16px 28px;
}
.site-header .inner,
.site-main,
.site-footer .inner {
  max-width: var(--ivp-max);
  margin: 0 auto;
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand-row img {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: #fff;
  object-fit: contain;
}
.brand-row h1 {
  margin: 0;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 750;
  letter-spacing: 0.01em;
}
.brand-row p {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.95rem;
}
.nav-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.nav-pills a {
  text-decoration: none;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.9rem;
}
.nav-pills a:hover,
.nav-pills a[aria-current="page"] {
  background: var(--ivp-teal);
  border-color: transparent;
  color: #fff;
}

.site-main { padding: 24px 16px 64px; }

.hero-card,
.card,
.step,
.faq-item,
.toc {
  background: var(--ivp-card);
  border: 1px solid var(--ivp-border);
  border-radius: var(--ivp-radius);
  box-shadow: 0 8px 24px rgba(11, 31, 51, 0.04);
}

.hero-card { padding: 22px; margin-bottom: 20px; }
.hero-card h2 { margin: 0 0 8px; font-size: 1.45rem; color: var(--ivp-navy); }
.hero-card p { margin: 0; color: var(--ivp-muted); }

.toc { padding: 16px 18px; margin-bottom: 20px; }
.toc h2 { margin: 0 0 10px; font-size: 1.05rem; color: var(--ivp-navy); }
.toc ol { margin: 0; padding-left: 1.2rem; }
.toc a { text-decoration: none; }

.search-box {
  display: flex;
  gap: 8px;
  margin: 0 0 20px;
}
.search-box input {
  flex: 1;
  border: 1px solid var(--ivp-border);
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  background: #fff;
}
.search-box button,
.btn {
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  background: var(--ivp-navy);
  color: #fff;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.btn.secondary { background: var(--ivp-teal); }
.btn.ghost {
  background: transparent;
  color: var(--ivp-navy);
  border: 1px solid var(--ivp-border);
}

section.guide-section {
  margin: 0 0 22px;
  padding: 20px;
  background: var(--ivp-card);
  border: 1px solid var(--ivp-border);
  border-radius: var(--ivp-radius);
}
section.guide-section h2 {
  margin: 0 0 8px;
  color: var(--ivp-navy);
  font-size: 1.25rem;
}
section.guide-section > p.lead {
  margin: 0 0 14px;
  color: var(--ivp-muted);
}

.steps { display: grid; gap: 12px; }
.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 14px;
}
.step .num {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(10, 166, 178, 0.14);
  color: var(--ivp-navy);
  font-weight: 750;
}
.step h3 { margin: 0 0 4px; font-size: 1rem; }
.step p { margin: 0; color: var(--ivp-muted); font-size: 0.95rem; }

.illus-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  margin: 12px 0 16px;
}
.illus {
  margin: 0;
  padding: 10px;
  background: #f0f7fa;
  border-radius: 14px;
  border: 1px solid #d7e2e8;
}
.illus svg,
.illus img {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 0 auto;
}
.illus figcaption {
  margin-top: 8px;
  color: var(--ivp-muted);
  font-size: 0.88rem;
  text-align: center;
  line-height: 1.35;
}

.callout {
  border-left: 4px solid var(--ivp-teal);
  background: rgba(10, 166, 178, 0.08);
  padding: 12px 14px;
  border-radius: 0 12px 12px 0;
  margin: 12px 0;
}
.callout.warning {
  border-left-color: #c47b16;
  background: rgba(196, 123, 22, 0.1);
}
.callout strong { color: var(--ivp-navy); }

.faq-item { padding: 14px 16px; margin-bottom: 10px; }
.faq-item h3 { margin: 0 0 6px; font-size: 1rem; color: var(--ivp-navy); }
.faq-item p { margin: 0; color: var(--ivp-muted); }

.module-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  background: #eef5f8;
  margin: 0 8px 8px 0;
  font-size: 0.9rem;
}
.module-chip img { width: 28px; height: 28px; }

.site-footer {
  border-top: 1px solid var(--ivp-border);
  background: #fff;
  padding: 22px 16px 36px;
  color: var(--ivp-muted);
  font-size: 0.92rem;
}
.site-footer a { margin-right: 12px; }

.hidden-by-search { display: none !important; }

@media print {
  body { background: #fff; }
  .site-header { background: #fff; color: #000; padding: 0 0 12px; }
  .brand-row p, .nav-pills, .search-box, .skip-link { display: none !important; }
  .brand-row h1 { color: #000; }
  .hero-card, .card, .step, section.guide-section, .toc, .faq-item {
    box-shadow: none;
    break-inside: avoid;
  }
  a { color: #000; text-decoration: none; }
}

@media (max-width: 640px) {
  .step { grid-template-columns: 36px 1fr; }
  .step .num { width: 36px; height: 36px; }
}