@import url("https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700;800&display=swap");

:root {
  --marketing-bg: #f8fafc;
  --marketing-surface: #ffffff;
  --marketing-surface-alt: #eef4ff;
  --marketing-surface-soft: #f1f5f9;
  --marketing-border: #e2e8f0;
  --marketing-border-strong: #cbd5e1;
  --marketing-text: #0f172a;
  --marketing-title: #0b1f3b;
  --marketing-muted: #64748b;
  --marketing-blue: #2563eb;
  --marketing-blue-deep: #1d4ed8;
  --marketing-green: #22c55e;
  --marketing-green-deep: #15803d;
  --marketing-dark: #081423;
  --marketing-shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
  --marketing-shadow-soft: 0 10px 24px rgba(15, 23, 42, 0.06);
  --marketing-radius-xl: 28px;
  --marketing-radius-lg: 22px;
  --marketing-radius-md: 16px;
  --marketing-radius-sm: 12px;
  --guide-shell: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Roboto", sans-serif;
  color: var(--marketing-text);
  background:
    radial-gradient(circle at 18% 0%, rgba(37, 99, 235, 0.10), transparent 30%),
    radial-gradient(circle at 86% 12%, rgba(34, 197, 94, 0.10), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, var(--marketing-bg) 58%, #ffffff 100%);
}

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

a {
  color: var(--marketing-blue);
  text-decoration: none;
}

a:hover { color: var(--marketing-blue-deep); }

button,
input,
textarea { font: inherit; }

header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(226, 232, 240, 0.92);
  background: rgba(248, 250, 252, 0.88);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(calc(100% - 32px), 1180px);
  min-height: 84px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 196px;
  height: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
}

.nav-links a {
  color: var(--marketing-title);
  font-weight: 500;
}

.nav-links a:hover { color: var(--marketing-blue); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

button,
.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--marketing-border);
  background: var(--marketing-surface);
  color: var(--marketing-title);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

button:hover,
.primary:hover,
.secondary:hover {
  transform: translateY(-1px);
  border-color: var(--marketing-border-strong);
  box-shadow: var(--marketing-shadow-soft);
}

.primary {
  border-color: rgba(34, 197, 94, 0.5);
  background: linear-gradient(180deg, #35d06f 0%, var(--marketing-green) 100%);
  color: #052415;
}

.secondary { background: rgba(255, 255, 255, 0.75); }

main {
  width: min(calc(100% - 32px), var(--guide-shell));
  margin: 0 auto;
  padding: 34px 0 88px;
  display: grid;
  gap: 28px;
}

section {
  padding: 30px;
  border: 1px solid var(--marketing-border);
  border-radius: var(--marketing-radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--marketing-shadow-soft);
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  align-items: center;
  padding: 38px;
  border-radius: var(--marketing-radius-xl);
  background:
    linear-gradient(135deg, rgba(238, 244, 255, 0.96) 0%, rgba(255, 255, 255, 0.98) 58%, rgba(220, 252, 231, 0.72) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -100px;
  width: 240px;
  height: 240px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.10);
}

.hero > * { position: relative; z-index: 1; }

.hero h1 {
  margin: 12px 0 14px;
  color: var(--marketing-title);
  font-size: clamp(38px, 6vw, 64px);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.hero p,
section > p,
.card p,
.callout p,
.steps,
.checklist li,
li {
  color: var(--marketing-muted);
  line-height: 1.65;
}

.hero p {
  max-width: 720px;
  margin: 0;
  font-size: 17px;
}

h2 {
  margin: 0 0 18px;
  color: var(--marketing-title);
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

h3 {
  margin: 0 0 8px;
  color: var(--marketing-title);
  line-height: 1.2;
}

.meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
  color: var(--marketing-blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
}

.toc {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 18px;
  color: var(--marketing-muted);
}

.grid,
.split {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  height: 100%;
  padding: 18px;
  border: 1px solid var(--marketing-border);
  border-radius: var(--marketing-radius-md);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.04);
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link .card {
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.card-link:hover .card {
  transform: translateY(-3px);
  border-color: rgba(37, 99, 235, 0.24);
  box-shadow: var(--marketing-shadow);
}

.card h3 { font-size: 18px; }

.card p {
  margin: 0;
  font-size: 14px;
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.checklist span {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 2px 8px;
  background: #dcfce7;
  color: #166534;
  font-size: 12px;
  font-weight: 700;
}

.callout {
  padding: 18px;
  border: 1px solid rgba(34, 197, 94, 0.24);
  border-left: 5px solid var(--marketing-green);
  border-radius: var(--marketing-radius-md);
  background: linear-gradient(180deg, rgba(240, 253, 244, 0.82) 0%, rgba(255, 255, 255, 0.96) 100%);
}

.steps {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 10px;
}

section table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--marketing-radius-md);
  background: #ffffff;
}

section th,
section td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--marketing-border);
  text-align: left;
  vertical-align: top;
}

section th {
  color: var(--marketing-title);
  background: var(--marketing-surface-alt);
}

.cta-strip {
  padding: 24px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: var(--marketing-radius-lg);
  background: linear-gradient(180deg, #0b1f3b 0%, #081423 100%);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  box-shadow: var(--marketing-shadow);
}

.cta-strip h3,
.cta-strip p { color: #ffffff; }

.cta-strip p { opacity: 0.78; }

footer {
  border-top: 1px solid rgba(226, 232, 240, 0.92);
  padding: 28px 24px 42px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--marketing-muted);
}

.footer-grid {
  width: min(100%, 1180px);
  margin: 0 auto;
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
}

.footer-grid h4 {
  margin: 0 0 10px;
  color: var(--marketing-title);
  font-size: 16px;
}

.footer-grid a,
.footer-grid span {
  display: inline-block;
  margin: 4px 0;
  color: var(--marketing-muted);
}

.footer-grid a:hover { color: var(--marketing-blue); }

@media (max-width: 1100px) {
  .nav,
  .hero {
    grid-template-columns: 1fr;
  }

  .nav {
    justify-items: center;
    padding: 14px 0 18px;
  }

  .nav-links,
  .nav-actions { justify-content: center; }

  .hero { text-align: center; }

  .hero p { margin-inline: auto; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .nav-links { gap: 14px; }

  .nav-actions {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  main {
    width: min(calc(100% - 20px), var(--guide-shell));
    padding-top: 22px;
  }

  section,
  .hero { padding: 22px; }

  .grid,
  .split { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 380px) {
  .footer-grid { grid-template-columns: 1fr; }
}

button[disabled],
button[aria-disabled="true"] {
  opacity: 0.62;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}