/* ==========================================================================
   WekApps PDF Merge & Split Pro — site stylesheet
   Lightweight, mobile-first, no external dependencies.
   ========================================================================== */

:root {
  --brand-blue: #4e8bf6;
  --brand-red: #df3933;
  --brand-yellow: #f3b900;
  --brand-green: #5f9024;
  --buy-green: #06c668;
  --buy-green-dark: #05b25e;
  --accent: #4e8bf6;
  --accent-dark: #3a71d6;
  --accent-soft: #eef4ff;
  --ink: #1f2937;
  --ink-soft: #374151;
  --muted: #6b7280;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --bg-tint: #f0f5ff;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 8px 28px rgba(16, 24, 40, 0.09);
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.25rem; }
h1, h2, h3, h4 { line-height: 1.2; color: var(--ink); margin: 0 0 0.5rem; font-weight: 700; }
h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1rem; }
strong { color: var(--ink); }
hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 3.5rem 0; }
.section-soft { background: var(--bg-soft); }
.lead { font-size: 1.15rem; color: var(--ink-soft); }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap { display: flex; align-items: center; gap: 1rem; min-height: 64px; }
.brand {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand .w { color: var(--brand-blue); }
.brand .e { color: var(--brand-red); }
.brand .k { color: var(--brand-yellow); }
.brand .g { color: var(--brand-green); }

.site-nav { margin-left: auto; }
.site-nav ul { list-style: none; display: flex; gap: 0.25rem; margin: 0; padding: 0; }
.site-nav a {
  display: block;
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
}
.site-nav a:hover { background: var(--bg-soft); color: var(--ink); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--accent-dark); background: var(--accent-soft); }
.site-nav a.nav-buy {
  background: var(--buy-green);
  color: #fff;
  padding: 0.45rem 1rem;
  margin-left: 0.25rem;
}
.site-nav a.nav-buy:hover { background: var(--buy-green-dark); }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1.3rem;
  line-height: 1;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  color: var(--ink);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.3;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease,
    transform 0.1s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-buy { background: var(--buy-green); color: #fff; }
.btn-buy:hover { background: var(--buy-green-dark); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-lg { padding: 0.9rem 1.8rem; font-size: 1.08rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn .icon { margin-right: 0.4rem; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, #eef4ff 0%, #f8faff 60%, #fff 100%);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 0 3rem;
}
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 2.5rem; align-items: center; }
.hero .kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: 1px solid #dbe7ff;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.hero h1 { margin-bottom: 0.85rem; }
.hero .sub { font-size: 1.15rem; color: var(--ink-soft); max-width: 34rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }
.hero-meta { margin-top: 1.25rem; font-size: 0.88rem; color: var(--muted); }
.hero-meta a { color: var(--accent-dark); }
.hero-art { text-align: center; }
.hero-art img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border: 1px solid var(--border); }

.trust-row { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; margin-top: 2rem; }
.trust-item { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); font-size: 0.92rem; }
.trust-item .dot { color: var(--buy-green); font-size: 1.1rem; }

/* ---------- Cards / feature grid ---------- */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--muted); margin-bottom: 0; }
.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 0.9rem;
  background: var(--accent-soft);
  color: var(--accent-dark);
}

/* ---------- Section header ---------- */
.section-head { max-width: 46rem; margin: 0 auto 2.25rem; text-align: center; }
.section-head h2 { margin-bottom: 0.5rem; }
.section-head p { color: var(--muted); font-size: 1.05rem; }
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 0.5rem;
}

/* ---------- Steps (How-to) ---------- */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps > li { position: relative; padding: 1.5rem 0 1.5rem 3.25rem; border-bottom: 1px solid var(--border); }
.steps > li:last-child { border-bottom: 0; }
.steps > li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1.35rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps h3 { margin-bottom: 0.4rem; }
.steps .step-img { margin: 0.75rem 0; border: 1px solid var(--border); border-radius: var(--radius); }
.steps .step-img img { border-radius: var(--radius); }
.steps .hint { font-size: 0.9rem; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.75rem; background: #fff; overflow: hidden; }
.faq-item summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--muted); font-weight: 400; line-height: 1; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .faq-body { padding: 0 1.25rem 1.15rem; color: var(--ink-soft); }
.faq-item .faq-body p:last-child { margin-bottom: 0; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { padding: 0.75rem 0.9rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
thead th { background: var(--bg-soft); font-weight: 700; color: var(--ink); }
td.center, th.center { text-align: center; }
.compare-check { color: var(--buy-green); font-weight: 700; }
.price { color: var(--buy-green); font-weight: 800; font-size: 1.3rem; }
.strike { text-decoration: line-through; color: var(--muted); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { font-size: 0.85rem; color: var(--muted); padding: 1rem 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "›"; margin-right: 0.4rem; color: var(--muted); }
.breadcrumbs a { color: var(--accent-dark); }

/* ---------- Callout / note ---------- */
.callout {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}
.callout.green { border-color: var(--buy-green); background: #ecfbf3; }
.callout.warn { border-color: var(--brand-yellow); background: #fff8e6; }
.callout p:last-child { margin-bottom: 0; }

/* ---------- Checklist ---------- */
.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { padding-left: 1.7rem; position: relative; margin-bottom: 0.5rem; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--buy-green); font-weight: 700; }

/* ---------- Prose (article content) ---------- */
.prose { max-width: 46rem; }
.prose h2 { margin-top: 2.25rem; }
.prose h3 { margin-top: 1.75rem; }
.prose img { margin: 1rem 0; border: 1px solid var(--border); border-radius: var(--radius); }
.prose ul, .prose ol { margin-bottom: 1rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  margin-top: 1rem;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255, 255, 255, 0.9); max-width: 40rem; margin: 0 auto 1.5rem; }
.cta-band .btn-primary { background: #fff; color: var(--accent-dark); }
.cta-band .btn-primary:hover { background: var(--bg-soft); }
.cta-band .btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.6); }
.cta-band .btn-outline:hover { border-color: #fff; color: #fff; }

/* ---------- Footer ---------- */
.site-footer { background: #111827; color: #d1d5db; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; padding: 3rem 1.25rem 2rem; }
.footer-grid .brand { color: #fff; }
.footer-grid p { font-size: 0.92rem; }
.footer-grid h3 { color: #fff; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 0.75rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.45rem; }
.footer-grid a { color: #9ca3af; font-size: 0.92rem; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #1f2937; padding: 1.25rem; font-size: 0.85rem; color: #6b7280; text-align: center; }

/* ---------- Utilities ---------- */
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.hidden { display: none; }
.tag {
  display: inline-block;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 999px;
  font-size: 0.78rem;
  padding: 0.2rem 0.7rem;
  margin: 0.2rem 0.2rem 0 0;
}

/* ---------- Article meta ---------- */
.article-meta { font-size: 0.9rem; color: var(--muted); margin-bottom: 1.5rem; }
.quick-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0.75rem; margin: 1.5rem 0; }
.quick-facts .fact { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 0.9rem; text-align: center; }
.quick-facts .fact .k { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.quick-facts .fact .v { font-weight: 700; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; padding: 0.5rem 1rem 1rem; gap: 0; }
  .site-nav a { padding: 0.7rem 0.5rem; border-radius: 8px; }
  .site-nav a.nav-buy { margin-left: 0; text-align: center; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .steps > li { padding-left: 2.6rem; }
  .cta-band { padding: 2rem 1.25rem; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}