/* ===== Base & Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1a1a2e;
  background: #ffffff;
  line-height: 1.7;
  font-size: 17px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.25; color: #0f172a; margin: 1.6em 0 0.6em; font-weight: 700; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); border-bottom: 3px solid #e2e8f0; padding-bottom: 0.3em; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
li { margin-bottom: 0.4em; }
table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 0.95rem; }
th, td { border: 1px solid #e2e8f0; padding: 0.7em 0.9em; text-align: left; vertical-align: top; }
th { background: #f1f5f9; font-weight: 600; }
tr:nth-child(even) td { background: #fafbfc; }

/* ===== Layout ===== */
.container { max-width: 880px; margin: 0 auto; padding: 0 20px; }
.wide { max-width: 1100px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e2e8f0;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; padding-bottom: 12px; gap: 16px; }
.brand { font-weight: 800; font-size: 1.15rem; color: #0f172a; }
.brand span { color: #2563eb; }
.main-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.main-nav a { color: #475569; font-size: 0.92rem; font-weight: 500; }
.main-nav a:hover { color: #2563eb; }
.menu-toggle { display: none; }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
  color: #fff;
  padding: 56px 0 48px;
  text-align: center;
}
.hero h1 { color: #fff; border: none; margin-top: 0; }
.hero p { color: #dbeafe; font-size: 1.1rem; max-width: 640px; margin: 0 auto 1.2em; }
.hero .updated { display: inline-block; background: rgba(255,255,255,0.15); padding: 4px 14px; border-radius: 999px; font-size: 0.82rem; margin-bottom: 10px; }

/* ===== Quick Answer ===== */
.quick-answer {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-left: 5px solid #2563eb;
  border-radius: 10px;
  padding: 22px 26px;
  margin: 32px 0;
}
.quick-answer h2 { border: none; margin-top: 0; font-size: 1.3rem; }
.quick-answer ul { margin-bottom: 0; }

/* ===== Badge / Rank ===== */
.rank-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #fff; font-weight: 700; font-size: 0.8rem;
  padding: 4px 12px; border-radius: 999px; margin-bottom: 8px;
}
.rank-badge.silver { background: linear-gradient(135deg, #94a3b8, #64748b); }
.rank-badge.bronze { background: linear-gradient(135deg, #b45309, #92400e); }

/* ===== Service Card ===== */
.service-card {
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 26px;
  margin: 24px 0;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: box-shadow 0.2s;
}
.service-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.service-card.featured { border-color: #2563eb; border-width: 2px; background: #fbfdff; }
.service-card h3 { margin-top: 0; }
.service-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 12px; }
.tag { display: inline-block; background: #f1f5f9; color: #475569; font-size: 0.8rem; padding: 3px 10px; border-radius: 999px; }
.tag.best { background: #dcfce7; color: #166534; }

/* ===== CTA Block ===== */
.cta-block {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  border-radius: 14px;
  padding: 28px 30px;
  margin: 26px 0;
  text-align: center;
}
.cta-block h3 { color: #fff; margin-top: 0; }
.cta-block p { color: #dbeafe; margin-bottom: 1.2em; }
.cta-button {
  display: inline-block;
  background: #f59e0b;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 34px;
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(245,158,11,0.4);
  transition: transform 0.15s, box-shadow 0.15s;
}
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245,158,11,0.5); text-decoration: none; }
.cta-block.small { padding: 18px 24px; }
.cta-block.small .cta-button { font-size: 0.95rem; padding: 10px 26px; }

/* ===== Info boxes ===== */
.info-box {
  border-radius: 12px;
  padding: 20px 24px;
  margin: 20px 0;
  border: 1px solid;
}
.info-box h3 { margin-top: 0; font-size: 1.1rem; }
.box-tip { background: #f0fdf4; border-color: #bbf7d0; }
.box-tip h3 { color: #166534; }
.box-mistake { background: #fef2f2; border-color: #fecaca; }
.box-mistake h3 { color: #991b1b; }
.box-expert { background: #fffbeb; border-color: #fde68a; }
.box-expert h3 { color: #92400e; }

/* ===== Checklist ===== */
.checklist { list-style: none; padding-left: 0; }
.checklist li { position: relative; padding-left: 30px; margin-bottom: 0.5em; }
.checklist li::before { content: "✅"; position: absolute; left: 0; top: 0; }

/* ===== Table wrapper for mobile ===== */
.table-wrap { overflow-x: auto; }

/* ===== Rating stars ===== */
.stars { color: #f59e0b; letter-spacing: 2px; font-weight: 700; }

/* ===== FAQ ===== */
.faq details {
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 14px 20px;
  margin-bottom: 12px;
  background: #fafbfc;
}
.faq summary { font-weight: 600; cursor: pointer; font-size: 1.02rem; }
.faq summary::marker { color: #2563eb; }
.faq details[open] { background: #fff; }

/* ===== Footer ===== */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 40px 0 24px; margin-top: 50px; }
.site-footer .container { display: flex; flex-wrap: wrap; gap: 30px; justify-content: space-between; }
.footer-col { min-width: 180px; }
.site-footer h4 { color: #fff; font-size: 1rem; margin-top: 0; }
.site-footer a { color: #93c5fd; font-size: 0.9rem; display: block; margin-bottom: 6px; }
.site-footer .disclaimer { border-top: 1px solid #1e293b; margin-top: 24px; padding-top: 16px; font-size: 0.8rem; color: #64748b; max-width: 100%; }
.site-footer .disclaimer p { margin-bottom: 0.4em; }

/* ===== Page hero (subpages) ===== */
.page-hero { background: linear-gradient(135deg, #0f172a, #1e3a8a); color: #fff; padding: 44px 0; text-align: center; }
.page-hero h1 { color: #fff; border: none; margin-top: 0; }
.page-hero p { color: #cbd5e1; max-width: 620px; margin: 0 auto; }

/* ===== Disclosure ===== */
.disclosure { background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px; padding: 12px 18px; font-size: 0.85rem; color: #78350f; margin: 20px 0; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #fff; padding: 12px 20px; border-bottom: 1px solid #e2e8f0; }
  .menu-toggle { display: inline-block; background: none; border: 1px solid #e2e8f0; border-radius: 8px; padding: 6px 12px; font-size: 1.2rem; cursor: pointer; }
  .main-nav.open { display: flex; }
  body { font-size: 16px; }
  .service-card, .cta-block { padding: 20px; }
}