/* Portal Landing Base: lightweight, no CDN, mobile-first safe */
:root {
  --bg: #0b1020;
  --bg-soft: #121a31;
  --surface: #ffffff;
  --surface-2: #f5f7fb;
  --ink: #111827;
  --muted: #64748b;
  --soft: #e5e7eb;
  --brand: #2563eb;
  --brand-2: #06b6d4;
  --accent: #f59e0b;
  --dark: #07111f;
  --white: #fff;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 22px 70px rgba(15, 23, 42, .16);
  --wrap: 1168px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% -10%, color-mix(in srgb, var(--brand-2) 22%, transparent), transparent 30rem),
    linear-gradient(180deg, var(--surface), var(--surface-2));
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.68;
}
a { color: inherit; }
.wrap { width: min(var(--wrap), calc(100% - 32px)); margin-inline: auto; }
.narrow { max-width: 890px; }
.skip-link {
  position: absolute; top: -90px; left: 12px; z-index: 1000;
  padding: 10px 14px; border-radius: 999px; background: var(--accent); color: #111;
}
.skip-link:focus { top: 12px; }

.topline {
  background: var(--dark);
  color: rgba(255,255,255,.82);
  font-size: 13px;
}
.topline .wrap {
  min-height: 38px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.topline a { color: var(--accent); text-decoration: none; font-weight: 800; }

.header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.header-inner {
  min-height: 76px;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px;
}
.logo {
  display: inline-flex; align-items: center; gap: 12px; text-decoration: none;
}
.logo-badge {
  width: 48px; height: 48px; display: grid; place-items: center;
  border-radius: 16px;
  color: #fff; font-weight: 950; font-size: 22px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: var(--shadow);
}
.logo strong { display: block; line-height: 1.1; font-size: clamp(18px, 2vw, 24px); }
.logo em { display: block; color: var(--muted); font-size: 12px; font-style: normal; }

.menu {
  justify-self: center;
  display: flex; align-items: center; gap: 4px;
}
.menu a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 850;
  text-decoration: none;
  font-size: 14px;
}
.menu a:hover { background: rgba(37,99,235,.08); color: var(--brand); }

.pill-cta, .main-btn, .plain-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; border-radius: 999px; padding: 12px 20px;
  font-weight: 950; text-decoration: none;
}
.pill-cta, .main-btn {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 14px 34px color-mix(in srgb, var(--brand) 24%, transparent);
}
.plain-btn {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--soft);
}
.burger {
  display: none;
  width: 46px; height: 46px; border: 1px solid var(--soft);
  border-radius: 14px; background: #fff;
}
.burger i {
  display: block; width: 20px; height: 2px; margin: 5px auto;
  background: var(--ink); border-radius: 5px;
}

.hero-portal {
  padding: clamp(42px, 7vw, 86px) 0 28px;
}
.hero-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 390px; gap: clamp(22px, 4vw, 54px);
  align-items: stretch;
}
.hero-main {
  position: relative;
  padding: clamp(24px, 5vw, 52px);
  border-radius: calc(var(--radius) + 10px);
  background:
    linear-gradient(135deg, rgba(255,255,255,.94), rgba(255,255,255,.78)),
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--brand-2) 20%, transparent), transparent 20rem);
  box-shadow: var(--shadow);
  border: 1px solid rgba(15,23,42,.08);
  overflow: hidden;
}
.hero-main::after {
  content: "";
  position: absolute; inset: auto -80px -120px auto;
  width: 320px; height: 320px; border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  pointer-events: none;
}
.breadcrumbs {
  position: relative; z-index: 1;
  display: flex; flex-wrap: wrap; gap: 8px;
  color: var(--muted); font-size: 13px; margin-bottom: 28px;
}
.breadcrumbs a { text-decoration: none; color: var(--brand); font-weight: 800; }

.kicker {
  margin: 0 0 10px;
  color: var(--brand);
  text-transform: uppercase;
  letter-spacing: .13em;
  font-size: 12px;
  font-weight: 950;
}
h1, h2, h3 { margin: 0; line-height: 1.09; }
h1 {
  position: relative; z-index: 1;
  max-width: 860px;
  font-size: clamp(38px, 6.4vw, 72px);
  letter-spacing: -.055em;
}
h2 { font-size: clamp(28px, 4.2vw, 48px); letter-spacing: -.04em; }
h3 { font-size: clamp(20px, 2.4vw, 28px); letter-spacing: -.025em; }

.hero-text {
  position: relative; z-index: 1;
  max-width: 760px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 23px);
  margin: 20px 0 0;
}
.action-row {
  position: relative; z-index: 1;
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px;
}
.keyword-cloud {
  position: relative; z-index: 1;
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px;
}
.keyword-cloud span, .chip {
  display: inline-flex;
  border: 1px solid var(--soft);
  background: rgba(255,255,255,.72);
  border-radius: 999px;
  padding: 7px 11px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.quick-panel {
  border-radius: calc(var(--radius) + 10px);
  background: var(--dark);
  color: #fff;
  padding: 28px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.quick-panel::before {
  content: "";
  position: absolute; width: 220px; height: 220px; border-radius: 50%;
  background: color-mix(in srgb, var(--brand-2) 32%, transparent);
  right: -90px; top: -80px;
}
.panel-label {
  display: inline-flex;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.08);
  border-radius: 999px;
  padding: 6px 10px;
  color: rgba(255,255,255,.76);
  font-size: 12px;
  font-weight: 900;
  margin-bottom: 18px;
}
.quick-panel h2, .quick-panel p, .quick-list, .rating-box { position: relative; z-index: 1; }
.quick-panel p { color: rgba(255,255,255,.72); }
.rating-box {
  margin: 22px 0;
  padding: 18px;
  border-radius: 20px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
}
.rating-box strong { display: block; font-size: 44px; line-height: 1; }
.rating-box span { color: rgba(255,255,255,.68); }
.quick-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 11px; }
.quick-list li {
  display: flex; justify-content: space-between; gap: 14px;
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 11px;
}
.quick-list b { color: var(--accent); text-align: right; }

.signal-band { padding: 16px 0 0; }
.signal-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.signal-card {
  background: #fff;
  border: 1px solid rgba(15,23,42,.08);
  border-radius: 18px;
  padding: 17px;
  box-shadow: 0 12px 34px rgba(15,23,42,.08);
}
.signal-card strong { display: block; }
.signal-card span { color: var(--muted); font-size: 14px; }

.section { padding: clamp(54px, 8vw, 88px) 0; }
.section.shade {
  background: linear-gradient(180deg, rgba(15,23,42,.045), rgba(15,23,42,.018));
  border-block: 1px solid rgba(15,23,42,.07);
}
.split {
  display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 22px; align-items: start;
}
.split.reverse { grid-template-columns: 330px minmax(0, 1fr); }
.article-card, .toc-card, .longread-card, .warning-box, .info-card {
  background: #fff;
  border: 1px solid rgba(15,23,42,.08);
  border-radius: var(--radius);
  box-shadow: 0 18px 46px rgba(15,23,42,.08);
}
.article-card, .longread-card { padding: clamp(22px, 4vw, 40px); }
.accent-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.9)),
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 20rem);
}
.copy { color: #334155; font-size: 17px; }
.copy p { margin: 16px 0 0; }
.copy h3 { margin-top: 28px; color: var(--ink); }
.copy ul, .copy ol { padding-left: 22px; }
.copy a { color: var(--brand); font-weight: 850; }

.toc-card {
  position: sticky; top: 104px;
  padding: 22px;
  display: grid; gap: 10px;
}
.toc-card a {
  text-decoration: none;
  color: var(--muted);
  border-top: 1px solid var(--soft);
  padding-top: 10px;
  font-weight: 850;
}
.toc-card a:hover { color: var(--brand); }

.heading { max-width: 820px; margin: 0 auto 28px; text-align: center; }
.heading.left { margin-left: 0; text-align: left; }
.heading p { color: var(--muted); }

.masonry-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr 1fr;
  gap: 16px;
}
.feature-tile {
  min-height: 170px;
  border-radius: var(--radius);
  padding: 22px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: var(--shadow);
}
.feature-tile:nth-child(2n) { background: linear-gradient(135deg, var(--dark), color-mix(in srgb, var(--brand) 40%, var(--dark))); }
.feature-tile:nth-child(3n) { background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 65%, #111), var(--brand)); }
.feature-tile p { color: rgba(255,255,255,.78); }

.info-stack { display: grid; gap: 14px; }
.info-card { padding: 20px; }
.info-card span {
  display: inline-flex; color: var(--brand); font-weight: 950; font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
}
.info-card p { color: var(--muted); margin-bottom: 0; }

.warning-box {
  margin-top: 22px;
  padding: 18px 20px;
  background: color-mix(in srgb, var(--accent) 11%, #fff);
}
.warning-box p { margin: 6px 0 0; color: var(--muted); }

.timeline {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: portal-step;
}
.timeline-item {
  counter-increment: portal-step;
  background: #fff;
  border: 1px solid rgba(15,23,42,.08);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 14px 38px rgba(15,23,42,.08);
}
.timeline-item::before {
  content: counter(portal-step);
  width: 42px; height: 42px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--dark); color: #fff; font-weight: 950;
  margin-bottom: 18px;
}
.timeline-item p { color: var(--muted); margin-bottom: 0; }

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 14px 38px rgba(15,23,42,.08);
  border: 1px solid rgba(15,23,42,.08);
}
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 640px; }
.table-wrap th, .table-wrap td { padding: 15px; border-bottom: 1px solid var(--soft); text-align: left; }
.table-wrap th { background: color-mix(in srgb, var(--brand) 8%, #fff); color: var(--ink); }
.table-wrap td { color: #334155; }

.faq-box { display: grid; gap: 12px; }
.faq-box details {
  background: #fff;
  border: 1px solid rgba(15,23,42,.08);
  border-radius: 18px;
  overflow: hidden;
}
.faq-box summary {
  cursor: pointer;
  padding: 18px 20px;
  list-style: none;
  font-weight: 950;
}
.faq-box summary::-webkit-details-marker { display: none; }
.faq-box p { margin: 0; padding: 0 20px 18px; color: var(--muted); }

.seo-after-faq { background: var(--dark); color: #fff; }
.seo-after-faq .kicker { color: var(--accent); }
.longread-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.055)),
    var(--dark);
  border-color: rgba(255,255,255,.12);
}
.longread-card .copy { color: rgba(255,255,255,.78); }
.longread-card .copy h2,
.longread-card .copy h3 { color: #fff; }
.longread-card .copy table { width: 100%; border-collapse: collapse; margin-top: 18px; }
.longread-card .copy th,
.longread-card .copy td { border: 1px solid rgba(255,255,255,.14); padding: 12px; }
.longread-card .copy th { color: #fff; background: rgba(255,255,255,.08); }

.closing { padding: 44px 0 74px; background: var(--dark); color: #fff; }
.closing-inner {
  display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 18px;
  padding: 28px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.045));
  border: 1px solid rgba(255,255,255,.12);
}
.closing p { color: rgba(255,255,255,.72); }

.footer {
  background: #050b14;
  color: rgba(255,255,255,.72);
  padding: 34px 0;
}
.footer-inner {
  display: grid; grid-template-columns: 1.1fr .8fr 1fr; gap: 20px; align-items: start;
}
.footer strong { color: #fff; font-size: 22px; }
.footer nav { display: grid; gap: 8px; }
.footer nav a { text-decoration: none; color: rgba(255,255,255,.72); }
.footer nav a:hover { color: #fff; }
.footer small { color: rgba(255,255,255,.58); }

@media (max-width: 960px) {
  .header-inner { grid-template-columns: auto auto; }
  .burger { display: block; justify-self: end; }
  .menu, .pill-cta { display: none; grid-column: 1 / -1; }
  .header.open .menu, .header.open .pill-cta { display: flex; }
  .header.open .menu { flex-direction: column; align-items: stretch; justify-self: stretch; }
  .header.open .pill-cta { justify-self: stretch; }
  .hero-layout, .split, .split.reverse, .closing-inner { grid-template-columns: 1fr; }
  .toc-card { position: static; }
  .signal-grid, .timeline { grid-template-columns: repeat(2, 1fr); }
  .masonry-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .wrap { width: min(100% - 24px, var(--wrap)); }
  .topline .wrap { align-items: flex-start; flex-direction: column; padding: 8px 0; gap: 3px; }
  .logo em { display: none; }
  .logo-badge { width: 42px; height: 42px; border-radius: 14px; }
  .hero-main, .quick-panel, .article-card, .longread-card { padding: 22px; }
  .action-row a { width: 100%; }
  .signal-grid, .timeline, .masonry-grid, .footer-inner { grid-template-columns: 1fr; }
  .quick-list li { display: grid; gap: 2px; }
  .quick-list b { text-align: left; }
}