@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap');

:root {
  --primary: #024ad8;
  --primary-bright: #296ef9;
  --primary-deep: #0e3191;
  --primary-soft: #c9e0fc;
  --canvas: #ffffff;
  --paper: #ffffff;
  --cloud: #f7f7f7;
  --fog: #e8e8e8;
  --steel: #c2c2c2;
  --ink: #1a1a1a;
  --ink-deep: #000000;
  --ink-soft: #292929;
  --on-ink: #ffffff;
  --charcoal: #3d3d3d;
  --graphite: #636363;
  --hairline: #e8e8e8;
  --shadow-soft: 0 2px 8px rgba(26,26,26,0.08);
  --shadow-float: 0 8px 24px rgba(26,26,26,0.12);
  --rounded-none: 0px;
  --rounded-xs: 2px;
  --rounded-sm: 3px;
  --rounded-md: 4px;
  --rounded-lg: 8px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Manrope', Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--ink);
  background: var(--canvas);
}

a { color: var(--primary); text-decoration: none; }
a:visited { color: var(--primary-deep); }

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

.container-site { max-width: 1366px; margin: 0 auto; padding: 0 24px; }

.section-gap { padding: 80px 0; }
.section-gap-sm { padding: 48px 0; }

.bg-canvas { background: var(--canvas); }
.bg-cloud { background: var(--cloud); }
.bg-fog { background: var(--fog); }
.bg-ink { background: var(--ink); }

.text-primary { color: var(--primary); }
.text-ink { color: var(--ink); }
.text-on-ink { color: var(--on-ink); }
.text-charcoal { color: var(--charcoal); }
.text-graphite { color: var(--graphite); }

.display-xxl { font-size: 72px; font-weight: 500; line-height: 1.0; }
.display-xl  { font-size: 56px; font-weight: 500; line-height: 1.0; }
.display-lg  { font-size: 44px; font-weight: 500; line-height: 1.0; }
.display-md  { font-size: 32px; font-weight: 500; line-height: 1.0; }
.display-sm  { font-size: 24px; font-weight: 500; line-height: 1.17; }
.display-xs  { font-size: 20px; font-weight: 500; line-height: 1.0; }
.body-lg     { font-size: 18px; font-weight: 400; line-height: 1.33; }
.body-md     { font-size: 16px; font-weight: 400; line-height: 1.38; }
.body-em     { font-size: 16px; font-weight: 500; line-height: 1.38; }
.caption-md  { font-size: 14px; font-weight: 400; line-height: 1.5; }
.caption-bold{ font-size: 14px; font-weight: 700; line-height: 1.3; }
.caption-sm  { font-size: 12px; font-weight: 400; line-height: 1.33; }
.link-md     { font-size: 16px; font-weight: 500; line-height: 1.38; color: var(--primary); }

.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  padding: 12px 24px;
  height: 44px;
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  line-height: 1.4;
  transition: background 0.15s;
}
.btn-primary:hover, .btn-primary:focus { background: var(--primary-deep); color: #fff; text-decoration: none; }

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  padding: 12px 24px;
  height: 44px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--primary);
  cursor: pointer;
  line-height: 1.4;
  transition: background 0.15s, color 0.15s;
}
.btn-outline:hover, .btn-outline:focus { background: var(--primary); color: #fff; text-decoration: none; }

.btn-ink {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  padding: 12px 24px;
  height: 44px;
  border-radius: var(--rounded-md);
  border: none;
  cursor: pointer;
  line-height: 1.4;
}
.btn-ink:hover, .btn-ink:focus { background: var(--ink-soft); color: #fff; text-decoration: none; }

.card {
  background: var(--canvas);
  border-radius: var(--rounded-xl);
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.card-cloud {
  background: var(--cloud);
  border-radius: var(--rounded-xl);
  padding: 32px;
}

.utility-strip {
  background: var(--ink);
  color: var(--on-ink);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 14px;
}

.site-header {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-nav {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
}

.site-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.site-logo span { color: var(--primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  color: var(--ink);
  font-size: 16px;
  font-weight: 400;
  padding: 8px 16px;
  border-radius: var(--rounded-md);
  display: block;
  text-decoration: none;
}
.nav-links a:hover { color: var(--primary); }
.nav-links a.active { border-bottom: 2px solid var(--primary); color: var(--primary); border-radius: 0; }

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
  transition: 0.2s;
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--canvas);
  z-index: 2000;
  padding: 32px 24px;
  flex-direction: column;
}
.mobile-menu.open { display: flex; }
.mobile-menu-close {
  align-self: flex-end;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--ink);
  margin-bottom: 24px;
}
.mobile-menu a {
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  padding: 14px 0;
  border-bottom: 1px solid var(--hairline);
  display: block;
  text-decoration: none;
}
.mobile-menu a:hover { color: var(--primary); }

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
  max-width: 1366px;
  margin: 0 auto;
  padding: 48px 24px;
}

.sidebar {
  position: sticky;
  top: 110px;
}
.sidebar-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 16px;
  padding: 0 12px;
}
.sidebar-nav { list-style: none; }
.sidebar-nav li a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 400;
  color: var(--charcoal);
  border-radius: var(--rounded-md);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.sidebar-nav li a:hover { color: var(--primary); border-left-color: var(--primary); }
.sidebar-nav li a.active { color: var(--primary); border-left-color: var(--primary); font-weight: 500; background: var(--primary-soft); }
.sidebar-section { margin-bottom: 8px; }
.sidebar-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--graphite);
  padding: 12px 12px 4px;
  margin-top: 8px;
}

.article-main { min-width: 0; }
.article-main h1 { font-size: 44px; font-weight: 500; line-height: 1.0; margin-bottom: 20px; }
.article-main h2 { font-size: 28px; font-weight: 500; line-height: 1.1; margin: 40px 0 16px; padding-top: 8px; }
.article-main h3 { font-size: 20px; font-weight: 500; line-height: 1.2; margin: 28px 0 12px; }
.article-main p { font-size: 16px; line-height: 1.7; color: var(--charcoal); margin-bottom: 16px; }
.article-main ul, .article-main ol { padding-left: 24px; margin-bottom: 16px; }
.article-main li { font-size: 16px; line-height: 1.7; color: var(--charcoal); margin-bottom: 6px; }
.article-main strong { color: var(--ink); font-weight: 600; }
.article-main a { color: var(--primary); }
.article-main a:hover { text-decoration: underline; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--graphite);
}
.breadcrumb a { color: var(--primary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb-sep { color: var(--steel); }

.toc-box {
  background: var(--cloud);
  border-radius: var(--rounded-lg);
  padding: 24px;
  margin-bottom: 40px;
}
.toc-box h4 { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; color: var(--graphite); margin-bottom: 12px; }
.toc-list { list-style: none; padding: 0; margin: 0; }
.toc-list li { margin-bottom: 6px; }
.toc-list a { font-size: 14px; color: var(--primary); text-decoration: none; }
.toc-list a:hover { text-decoration: underline; }
.toc-list .toc-sub { padding-left: 16px; margin-top: 4px; }

.article-image {
  width: 100%;
  border-radius: var(--rounded-xl);
  object-fit: cover;
  margin: 24px 0;
}

.related-box {
  background: var(--cloud);
  border-radius: var(--rounded-xl);
  padding: 32px;
  margin-top: 48px;
}
.related-box h3 { font-size: 20px; font-weight: 500; margin-bottom: 20px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.related-card {
  background: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: 16px;
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  display: block;
  transition: box-shadow 0.15s;
}
.related-card:hover { box-shadow: var(--shadow-float); }
.related-card h4 { font-size: 14px; font-weight: 500; color: var(--ink); margin-bottom: 6px; }
.related-card p { font-size: 12px; color: var(--graphite); line-height: 1.4; }

.hero-section {
  background: var(--canvas);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  max-width: 1366px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
}
.hero-card {
  background: var(--canvas);
  border-radius: var(--rounded-xl);
  padding: 64px 48px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.chevron-left {
  position: absolute;
  left: -48px;
  top: 0;
  width: 80px;
  height: 100%;
  background: var(--primary);
  transform: skewX(-12deg);
  z-index: 0;
}
.chevron-right {
  position: absolute;
  right: -48px;
  top: 0;
  width: 80px;
  height: 100%;
  background: var(--primary);
  transform: skewX(-12deg);
  z-index: 0;
}
.hero-content { position: relative; z-index: 1; }
.hero-eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}
.hero-title { font-size: 48px; font-weight: 500; line-height: 1.05; color: var(--ink); margin-bottom: 20px; }
.hero-body { font-size: 18px; line-height: 1.5; color: var(--charcoal); margin-bottom: 32px; }
.hero-image-wrap {
  border-radius: var(--rounded-xl);
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.hero-image-wrap img { width: 100%; height: 380px; object-fit: cover; border-radius: var(--rounded-xl); }

.section-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.section-card {
  background: var(--canvas);
  border-radius: var(--rounded-xl);
  padding: 28px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  border: 1px solid var(--hairline);
  transition: box-shadow 0.15s;
}
.section-card:hover { box-shadow: var(--shadow-float); }
.section-card-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-soft);
  border-radius: var(--rounded-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
}
.section-card h3 { font-size: 18px; font-weight: 500; color: var(--ink); }
.section-card p { font-size: 14px; color: var(--charcoal); line-height: 1.5; flex: 1; }
.section-card .read-link { font-size: 14px; font-weight: 500; color: var(--primary); }

.promo-dark {
  background: var(--ink);
  border-radius: var(--rounded-xl);
  padding: 48px;
  color: var(--on-ink);
}
.promo-dark h2 { font-size: 32px; font-weight: 500; margin-bottom: 16px; color: var(--on-ink); }
.promo-dark p { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 24px; }

.faq-item {
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin-bottom: 8px;
}
.faq-item summary {
  font-size: 16px;
  font-weight: 500;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--canvas);
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 20px; color: var(--primary); }
.faq-item[open] summary::after { content: '−'; }
.faq-item .faq-body { padding: 16px 20px; font-size: 16px; color: var(--charcoal); line-height: 1.6; background: var(--cloud); }

.contact-form { max-width: 640px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  background: var(--canvas);
  color: var(--ink);
  font-family: inherit;
  font-size: 16px;
  padding: 10px 14px;
  height: 44px;
  border: 1px solid var(--steel);
  border-radius: var(--rounded-md);
  outline: none;
  transition: border-color 0.15s;
}
.form-control:focus { border-color: var(--ink); }
textarea.form-control { height: auto; resize: vertical; min-height: 120px; }
.form-success {
  background: #e8f5e9;
  border: 1px solid #a5d6a7;
  color: #2e7d32;
  padding: 16px 20px;
  border-radius: var(--rounded-md);
  font-size: 14px;
  display: none;
}
.form-loading {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.form-error-msg { font-size: 12px; color: #b3262b; margin-top: 4px; display: none; }

.site-footer {
  background: var(--ink);
  color: var(--on-ink);
  padding: 64px 32px 0;
}
.footer-grid {
  max-width: 1366px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--on-ink);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-col ul li a:hover { color: #fff; }
.footer-col p { font-size: 13px; color: rgba(255,255,255,0.65); line-height: 1.55; }

.footer-bottom {
  max-width: 1366px;
  margin: 0 auto;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-copyright { font-size: 12px; color: var(--graphite); }
.footer-legal-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-legal-links a { font-size: 12px; color: var(--steel); text-decoration: none; }
.footer-legal-links a:hover { color: #fff; }
.footer-disclaimer {
  max-width: 1366px;
  margin: 0 auto;
  padding: 0 0 32px;
  font-size: 11px;
  color: var(--graphite);
  line-height: 1.5;
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--on-ink);
  padding: 16px 24px;
  z-index: 5000;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 2px solid var(--primary);
}
.cookie-banner p { font-size: 14px; flex: 1; min-width: 200px; }
.cookie-banner p a { color: var(--primary-bright); }
.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }

.tech-disclaimer {
  background: var(--fog);
  border-left: 3px solid var(--primary);
  padding: 12px 16px;
  border-radius: var(--rounded-sm);
  margin: 20px 0;
  font-size: 13px;
  color: var(--charcoal);
  line-height: 1.5;
}

.page-hero-band {
  background: var(--cloud);
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--hairline);
}
.page-hero-band .container-site {}

.tag-chip {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.category-tab {
  background: var(--canvas);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: var(--rounded-pill);
  border: 1px solid var(--hairline);
  text-decoration: none;
  display: inline-block;
  transition: background 0.15s, color 0.15s;
}
.category-tab:hover, .category-tab.active {
  background: var(--ink);
  color: var(--on-ink);
  border-color: var(--ink);
}

.ink-slab {
  background: var(--ink);
  color: var(--on-ink);
  padding: 80px 0;
}
.ink-slab h2 { font-size: 32px; font-weight: 500; color: var(--on-ink); margin-bottom: 16px; }
.ink-slab p { font-size: 18px; color: rgba(255,255,255,0.8); }

@media (max-width: 1023px) {
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .layout-with-sidebar {
    grid-template-columns: 1fr;
    padding: 32px 16px;
  }
  .sidebar { position: static; display: none; }
  .hero-card { grid-template-columns: 1fr; padding: 40px 24px; gap: 32px; }
  .hero-title { font-size: 36px; }
  .chevron-left, .chevron-right { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .section-gap { padding: 48px 0; }
  .display-lg { font-size: 32px; }
  .display-md { font-size: 24px; }
  .hero-title { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .site-nav { padding: 0 16px; }
  .container-site { padding: 0 16px; }
  .hero-card { padding: 28px 16px; }
  .footer-bottom { flex-direction: column; }
}

@media (max-width: 479px) {
  .hero-title { font-size: 24px; }
  .section-card-grid { grid-template-columns: 1fr; }
}