/* =========================================================
   XSNThuận — Mobile-first stylesheet
   Base styles target mobile; min-width queries scale up.
   ========================================================= */

:root {
  --red: #C8102E;
  --red-dark: #9c0c22;
  --gold: #F5B301;
  --gold-dark: #d99a00;
  --ink: #221B17;
  --ink-soft: #4a4038;
  --bg: #FFF8EE;
  --bg-card: #FFFFFF;
  --line: #EFE1CB;
  --green: #1E8A4C;
  --radius: 14px;
  --shadow: 0 6px 20px rgba(34, 27, 23, 0.08);
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { padding-left: 1.2rem; }
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.1rem;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg-card);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.7rem 1.1rem;
  max-width: var(--max); margin: 0 auto;
}
.logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-weight: 800; font-size: 1.25rem; color: var(--ink);
}
.logo img { height: 40px; width: auto; display: block; }
.logo:hover { text-decoration: none; }
@media (min-width: 640px) { .logo img { height: 46px; } }

.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 8px;
  background: none; border: 1px solid var(--line); cursor: pointer;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--ink);
  position: relative; transition: 0.2s;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

.main-nav {
  position: fixed; inset: 0 0 0 30%;
  background: var(--bg-card);
  transform: translateX(100%);
  transition: transform 0.25s ease;
  padding: 5rem 1.5rem 2rem;
  z-index: 49;
  box-shadow: -8px 0 24px rgba(0,0,0,0.15);
}
.main-nav.open { transform: translateX(0); }
.main-nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.3rem; }
.main-nav a {
  display: block; padding: 0.7rem 0.4rem; color: var(--ink); font-weight: 600;
  border-bottom: 1px solid var(--line);
}
.main-nav a:hover { color: var(--red); text-decoration: none; }
.nav-cta {
  margin-top: 1.2rem;
}

.nav-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.35);
  opacity: 0; pointer-events: none; transition: opacity 0.25s ease; z-index: 48;
}
.nav-backdrop.open { opacity: 1; pointer-events: auto; }

@media (min-width: 860px) {
  .nav-toggle { display: none; }
  .nav-backdrop { display: none; }
  .main-nav {
    position: static; transform: none; inset: auto; box-shadow: none;
    padding: 0; background: transparent;
  }
  .main-nav ul { flex-direction: row; align-items: center; gap: 1.6rem; }
  .main-nav a { border-bottom: none; padding: 0.4rem 0.1rem; }
  .nav-cta { margin-top: 0; }
  .header-inner { padding: 0.9rem 1.1rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.85rem 1.4rem; border-radius: 999px; font-weight: 700; font-size: 1rem;
  border: 2px solid transparent; cursor: pointer; min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 18px rgba(200,16,46,0.28); }
.btn-primary:hover { background: var(--red-dark); }
.btn-gold { background: var(--gold); color: var(--ink); box-shadow: 0 8px 18px rgba(245,179,1,0.28); }
.btn-gold:hover { background: var(--gold-dark); }
.btn-outline { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn-block { width: 100%; }

/* ---------- Hero (hook section) ---------- */
.hero {
  padding: 2.2rem 0 2.6rem;
  background:
    radial-gradient(circle at 90% -10%, rgba(245,179,1,0.25), transparent 55%),
    radial-gradient(circle at -10% 110%, rgba(200,16,46,0.12), transparent 55%);
}
.badge-row {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem;
}
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 0.3rem 0.7rem; font-size: 0.78rem; font-weight: 700; color: var(--ink-soft);
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); }

.hero h1 {
  font-size: 1.9rem; line-height: 1.2; margin: 0 0 0.8rem; font-weight: 900;
  letter-spacing: -0.01em;
}
.hero h1 .accent { color: var(--red); }
.hero p.lead {
  font-size: 1.02rem; color: var(--ink-soft); margin: 0 0 1.4rem; max-width: 60ch;
}
.hero-actions { display: flex; flex-direction: column; gap: 0.7rem; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.4rem;
  font-size: 0.82rem; color: var(--ink-soft);
}
.hero-trust strong { color: var(--ink); display: block; font-size: 1.15rem; }

@media (min-width: 640px) {
  .hero-actions { flex-direction: row; }
}

.hero-media { margin-top: 2rem; }
.hero-media img {
  width: 100%; max-width: 420px; height: auto; display: block; margin: 0 auto;
  border-radius: 20px; box-shadow: 0 16px 36px rgba(200,16,46,0.18);
}

@media (min-width: 860px) {
  .hero { padding: 4rem 0 4.5rem; }
  .hero h1 { font-size: 2.9rem; }
  .hero p.lead { font-size: 1.15rem; }
  .hero-grid { display: flex; align-items: center; gap: 2.5rem; }
  .hero-content { flex: 1.1; min-width: 0; }
  .hero-media { flex: 1; margin-top: 0; }
  .hero-media img { max-width: 100%; }
}

/* ---------- Sections ---------- */
section { padding: 2.4rem 0; }
.section-head { max-width: 62ch; margin-bottom: 1.6rem; }
.eyebrow {
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.75rem;
  font-weight: 800; color: var(--red); margin: 0 0 0.4rem;
}
.section-head h2 { font-size: 1.5rem; margin: 0 0 0.5rem; font-weight: 800; }
.section-head p { color: var(--ink-soft); margin: 0; }

@media (min-width: 860px) {
  section { padding: 3.6rem 0; }
  .section-head h2 { font-size: 2rem; }
}

/* ---------- Feature / value cards ---------- */
.grid {
  display: grid; grid-template-columns: 1fr; gap: 1rem;
}
@media (min-width: 640px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 860px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 640px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }

.card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.3rem; box-shadow: var(--shadow);
}
.card .icon {
  width: 44px; height: 44px; border-radius: 10px; margin-bottom: 0.8rem;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--red), var(--gold)); color: #fff; font-size: 1.2rem;
}
.card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.94rem; }

/* ---------- How it works ---------- */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.steps li {
  display: flex; gap: 0.9rem; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem; box-shadow: var(--shadow);
}
.steps .num {
  flex: 0 0 auto; width: 32px; height: 32px; border-radius: 50%;
  background: var(--ink); color: #fff; font-weight: 800; font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
}
.steps h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.steps p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- Results table template ---------- */
.sample-banner {
  background: #FDEDED; border: 1px solid #F5B8B8; color: #9c0c22; border-radius: var(--radius);
  padding: 0.9rem 1.1rem; margin-bottom: 1.4rem; font-size: 0.92rem; font-weight: 600; text-align: center;
}
.result-meta-bar {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.6rem;
  padding: 0.8rem 1rem; background: #FFF3D6; border: 1px solid #F0D48A; border-radius: var(--radius);
  margin-bottom: 1rem; font-size: 0.85rem; font-weight: 600; color: var(--ink);
}
.result-table-wrap {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; margin: 0 0 1.6rem;
}
.result-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--line); gap: 1rem;
}
.result-row:last-child { border-bottom: none; }
.result-row .tier-name { font-weight: 700; font-size: 0.85rem; color: var(--ink-soft); flex: 0 0 auto; min-width: 84px; }
.result-row .tier-numbers {
  font-weight: 800; font-size: 1rem; letter-spacing: 0.04em; text-align: right; color: var(--ink);
  font-variant-numeric: tabular-nums; word-break: break-word;
}
.result-row.special { background: linear-gradient(135deg, rgba(200,16,46,0.08), rgba(245,179,1,0.14)); }
.result-row.special .tier-name { color: var(--red); }
.result-row.special .tier-numbers { font-size: 1.4rem; color: var(--red); }

/* ---------- Info table ---------- */
.table-wrap {
  overflow-x: auto; margin: 0 0 1.4rem;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-card);
}
.info-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.info-table th, .info-table td { padding: 0.65rem 0.9rem; text-align: left; border-bottom: 1px solid var(--line); }
.info-table th { background: #FFF3D6; font-weight: 700; color: var(--ink); white-space: nowrap; }
.info-table tr:last-child td { border-bottom: none; }

.tier-list { list-style: none; padding: 0; margin: 0 0 1.4rem; display: grid; gap: 0.5rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .tier-list { grid-template-columns: repeat(3, 1fr); } }
.tier-list li {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 10px;
  padding: 0.55rem 0.8rem; font-size: 0.88rem; font-weight: 600; color: var(--ink);
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  margin-bottom: 0.7rem; overflow: hidden;
}
.faq-item summary {
  cursor: pointer; padding: 1rem 1.1rem; font-weight: 700; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 1.3rem; color: var(--red); flex: 0 0 auto;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-a { padding: 0 1.1rem 1.1rem; color: var(--ink-soft); }

/* ---------- Blog preview / cards ---------- */
.blog-grid { display: grid; gap: 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 700px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .blog-grid { grid-template-columns: repeat(3, 1fr); } }

.post-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.post-card .thumb {
  height: 110px;
  background: linear-gradient(135deg, var(--red), var(--gold));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 1.6rem;
}
.post-card .body { padding: 1.1rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.post-card .meta { font-size: 0.76rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.04em; }
.post-card h3 { margin: 0; font-size: 1.05rem; line-height: 1.35; }
.post-card p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; flex: 1; }
.post-card .read-more { font-weight: 700; font-size: 0.9rem; }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs { font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 1rem; }
.breadcrumbs a { color: var(--ink-soft); }
.breadcrumbs .sep { margin: 0 0.35rem; }
.breadcrumbs .current { color: var(--ink); font-weight: 600; }

/* ---------- Article ---------- */
.article-hero { padding: 1.6rem 0 1rem; }
.article-hero h1 { font-size: 1.6rem; margin: 0.3rem 0 0.6rem; font-weight: 900; line-height: 1.28; }
.article-meta { font-size: 0.85rem; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 0.8rem; }
.article-body { max-width: 72ch; }
.article-body h2 { font-size: 1.25rem; margin: 1.8rem 0 0.7rem; }
.article-body h3 { font-size: 1.05rem; margin: 1.3rem 0 0.5rem; }
.article-body p { margin: 0 0 1rem; color: var(--ink-soft); }
.article-body ul, .article-body ol { color: var(--ink-soft); margin: 0 0 1rem; }
.article-body li { margin-bottom: 0.35rem; }
.key-takeaways, .toc {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.3rem; margin: 1.4rem 0 1.8rem;
}
.key-takeaways { background: #EAF7EF; border-color: #BFE8CC; }
.key-takeaways h3, .toc h3 { margin-top: 0 !important; display: flex; align-items: center; gap: 0.4rem; }
.key-takeaways ul, .toc ol { margin: 0 !important; }
.key-takeaways li, .toc li { margin-bottom: 0.4rem; }
.toc a { font-weight: 600; }
.toc a:hover { color: var(--red); }

.callout {
  background: #FFF3D6; border: 1px solid #F0D48A; border-radius: var(--radius);
  padding: 1rem 1.1rem; margin: 1.4rem 0; font-size: 0.92rem;
}
.callout strong { color: var(--red-dark); }
.cta-box {
  background: linear-gradient(135deg, var(--red), var(--red-dark));
  color: #fff; border-radius: var(--radius); padding: 1.4rem; margin: 2rem 0;
  text-align: center;
}
.cta-box h3 { margin: 0 0 0.4rem; }
.cta-box p { color: rgba(255,255,255,0.9); margin: 0 0 1rem; }
.cta-box .btn-gold { border: none; }

.related-posts { margin-top: 2rem; }
.related-posts h2 { font-size: 1.2rem; }
.related-list { display: grid; gap: 0.8rem; }
@media (min-width: 700px) { .related-list { grid-template-columns: repeat(2, 1fr); } }
.related-list a {
  display: block; background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 10px; padding: 0.9rem 1rem; font-weight: 700; color: var(--ink);
}
.related-list a:hover { border-color: var(--red); text-decoration: none; }
.related-list span { display: block; font-weight: 400; color: var(--ink-soft); font-size: 0.85rem; margin-top: 0.2rem; }

/* ---------- Disclaimer ---------- */
.disclaimer {
  background: #F4EFE6; border-top: 1px solid var(--line); font-size: 0.82rem;
  color: var(--ink-soft); padding: 1.2rem 0;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink); color: #EDE6DC; padding: 2.4rem 0 1.4rem;
}
.footer-grid {
  display: grid; gap: 1.6rem; grid-template-columns: 1fr;
}
@media (min-width: 700px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .footer-grid { grid-template-columns: 1.2fr repeat(4, 1fr); } }
.site-footer h3 { color: #fff; font-size: 0.95rem; margin: 0 0 0.7rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.45rem; }
.site-footer a { color: #C9BFB1; }
.site-footer a:hover { color: #fff; }
.footer-logo { font-weight: 800; font-size: 1.15rem; color: #fff; margin-bottom: 0.5rem; }
.footer-bottom {
  margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 0.78rem; color: #A79C8C; display: flex; flex-wrap: wrap; gap: 0.6rem 1.2rem; justify-content: space-between;
}

/* ---------- Sticky mobile CTA ---------- */
.mobile-cta-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  background: #fff; border-top: 1px solid var(--line);
  padding: 0.6rem 1rem; box-shadow: 0 -6px 18px rgba(0,0,0,0.08);
}
.mobile-cta-bar .btn { width: 100%; }
@media (min-width: 860px) { .mobile-cta-bar { display: none; } }
.mobile-cta-spacer { height: 78px; }
@media (min-width: 860px) { .mobile-cta-spacer { display: none; } }