/* PDF TOC Linker — site styles */
:root {
  --blue: #3b82f6;
  --blue-dark: #2563eb;
  --blue-soft: #eff6ff;
  --blue-soft-2: #dbeafe;
  --ink: #0f172a;
  --ink-2: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --white: #ffffff;
  --amber: #f59e0b;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
  --radius: 16px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink-2);
  line-height: 1.65;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ---------- Sticky header / jump menu ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.brand .accent { color: var(--blue); }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.nav a {
  color: var(--ink-2);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
  white-space: nowrap;
}
.nav a:hover { background: var(--blue-soft); text-decoration: none; }
.nav a.active { color: var(--blue-dark); background: var(--blue-soft); }
/* Header CTA button keeps white text/blue bg even inside .nav */
.nav a.btn-primary { color: #fff; }
.nav a.btn-primary:hover { color: #fff; background: var(--blue-dark); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-weight: 700;
  font-size: 1rem;
  padding: 13px 24px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.05s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.35);
}
.btn-primary:hover { background: var(--blue-dark); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost {
  background: #fff;
  color: var(--blue-dark);
  border: 1.5px solid var(--blue-soft-2);
}
.btn-ghost:hover { background: var(--blue-soft); }

/* ---------- Sections ---------- */
section { scroll-margin-top: 84px; }

.section {
  padding: 72px 0;
}
.section-alt { background: var(--blue-soft); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--blue);
  margin: 0 0 10px;
}
h1, h2, h3 { color: var(--ink); letter-spacing: -0.02em; }
.section h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 14px;
}
.lead { font-size: 1.12rem; color: var(--muted); max-width: 720px; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--blue-soft) 0%, var(--blue-soft-2) 100%);
  padding: 84px 0 76px;
  text-align: center;
}
.hero-logo { width: 76px; height: 76px; margin: 0 auto 22px; }
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  margin: 0 auto 18px;
  max-width: 800px;
}
.hero h1 .accent { color: var(--blue); }
.hero p {
  font-size: 1.18rem;
  color: var(--ink-2);
  max-width: 620px;
  margin: 0 auto 30px;
}
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Callout (what you can do) ---------- */
.callout {
  background: #fff;
  border: 1px solid var(--border);
  border-left: 5px solid var(--blue);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 36px;
  max-width: 760px;
  margin: -44px auto 0;
  position: relative;
}
.callout h2 { font-size: 1.35rem; margin: 0 0 18px; }
.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 1.05rem;
  color: var(--ink-2);
}
.check-list li::before {
  content: "";
  flex: 0 0 22px;
  height: 22px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--blue-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%233b82f6' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ---------- Authority ---------- */
.authority { text-align: center; }
.authority p { font-size: 1.18rem; color: var(--ink-2); max-width: 760px; margin: 0 auto; }

/* ---------- Screenshot grid ---------- */
.shots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  margin-top: 12px;
}
.shot {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.shot:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.shot img { width: 100%; }
.shot .cap {
  padding: 14px 18px 18px;
  font-weight: 600;
  color: var(--ink);
}
.shot .cap .step {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  width: 22px; height: 22px;
  line-height: 22px;
  text-align: center;
  border-radius: 50%;
  margin-right: 8px;
}

/* ---------- How it works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 12px;
}
.step-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}
.step-card .num {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.step-card h3 { margin: 0 0 8px; font-size: 1.15rem; }
.step-card p { margin: 0; color: var(--muted); }
.note {
  margin: 30px auto 0;
  max-width: 820px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  color: var(--ink-2);
  font-size: 0.98rem;
  box-shadow: var(--shadow-sm);
}
.note strong { color: var(--blue-dark); }

/* ---------- How it works: two-column (steps + carousel) ---------- */
.how-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: center;
  margin-top: 14px;
}
.how-steps { display: flex; flex-direction: column; gap: 18px; }
.step-card.row { display: flex; gap: 16px; align-items: flex-start; padding: 22px 24px; }
.step-card.row .num { margin-bottom: 0; flex: 0 0 40px; }
.step-card.row h3 { margin: 2px 0 6px; }

/* Carousel */
.carousel { position: relative; }
.carousel-viewport {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: #fff;
}
.carousel-track { display: flex; transition: transform 0.35s ease; }
.carousel-slide { min-width: 100%; }
.carousel-slide img { width: 100%; display: block; }
.carousel-slide figcaption {
  padding: 16px 18px;
  font-weight: 600;
  color: var(--ink);
  text-align: center;
}
.carousel-arrow {
  position: absolute;
  top: 42%;
  transform: translateY(-50%);
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow);
  color: var(--blue-dark);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s ease, transform 0.05s ease;
}
.carousel-arrow:hover { background: var(--blue-soft); }
.carousel-arrow:active { transform: translateY(-50%) scale(0.94); }
.carousel-arrow.prev { left: 10px; }
.carousel-arrow.next { right: 10px; }
.carousel-dots { display: flex; gap: 9px; justify-content: center; margin-top: 18px; }
.carousel-dots button {
  width: 10px; height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--blue-soft-2);
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease, transform 0.15s ease;
}
.carousel-dots button.active { background: var(--blue); transform: scale(1.15); }

/* ---------- Local files + privacy block ---------- */
.local-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: center;
}
.local-grid img {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.local-grid p { color: var(--ink-2); font-size: 1.05rem; }

/* ---------- FAQ ---------- */
.faq-cat { margin-top: 40px; }
.faq-cat:first-of-type { margin-top: 24px; }
.faq-cat > h3 {
  font-size: 1.15rem;
  color: var(--blue-dark);
  border-bottom: 2px solid var(--blue-soft-2);
  padding-bottom: 8px;
  margin: 0 0 14px;
}
details.faq {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
details.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 52px 18px 22px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  position: absolute;
  right: 22px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--blue);
  transition: transform 0.2s ease;
}
details.faq[open] summary::after { content: "\2212"; }
details.faq .answer {
  padding: 0 22px 20px;
  color: var(--muted);
}
.hl-blue { color: var(--blue-dark); font-weight: 700; }
.hl-amber { color: var(--amber); font-weight: 700; }

/* ---------- Privacy ---------- */
.privacy-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 44px;
  max-width: 800px;
  margin: 0 auto;
}
.privacy-card h3 { margin-top: 0; }
.privacy-card p { color: var(--ink-2); }
.privacy-card .updated { color: var(--muted); font-size: 0.92rem; margin-top: 26px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: #cbd5e1;
  padding: 40px 0;
  text-align: center;
}
.site-footer .brand-foot {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 800; color: #fff; font-size: 1.05rem; margin-bottom: 10px;
}
.site-footer .brand-foot img { width: 26px; height: 26px; }
.site-footer .foot-links { margin: 8px 0; }
.site-footer .foot-links a { color: #93c5fd; margin: 0 10px; font-weight: 600; }
.site-footer small { color: #94a3b8; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .local-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .how-grid { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 640px) {
  .shots { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .nav a { padding: 8px 9px; font-size: 0.9rem; }
  .brand span.full { display: none; }
  .callout { padding: 26px 22px; }
  .privacy-card { padding: 28px 22px; }
}