:root {
  --bg: #0b1220;
  --bg-soft: #121a31;
  --card: rgba(17, 25, 46, 0.9);
  --card-strong: rgba(21, 32, 58, 0.96);
  --line: rgba(126, 180, 255, 0.18);
  --line-strong: rgba(126, 180, 255, 0.3);
  --text: #f4f7ff;
  --muted: #aab7d4;
  --accent: #7dd3fc;
  --accent-strong: #7c8cff;
  --accent-soft: rgba(125, 211, 252, 0.14);
  --warm: #ffd58d;
  --shadow: 0 26px 62px rgba(3, 8, 20, 0.44);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shell: 1180px;
  --header-h: 74px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 140, 255, 0.2), transparent 34%),
    radial-gradient(circle at top right, rgba(125, 211, 252, 0.12), transparent 28%),
    linear-gradient(180deg, #0b1220 0%, #0d1526 46%, #0a1220 100%);
  font: 16px/1.65 "Segoe UI Variable", "Segoe UI", "Trebuchet MS", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0));
}

a {
  color: inherit;
  text-decoration: none;
}

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

.shell {
  width: min(calc(100% - 28px), var(--shell));
  margin: 0 auto;
}

.page-main {
  padding: 22px 0 56px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(10, 17, 31, 0.78);
  border-bottom: 1px solid var(--line);
}

.topbar {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-logo {
  width: 146px;
  height: auto;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font: 800 0.98rem/1 "Bahnschrift", "Segoe UI", sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-copy span {
  font-size: 0.82rem;
  color: var(--muted);
}

.menu-wrap {
  display: flex;
  align-items: center;
  gap: 18px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.main-nav a,
.lang-switcher a {
  color: rgba(244, 247, 255, 0.92);
  font-weight: 600;
  font-size: 0.95rem;
}

.main-nav a:hover,
.lang-switcher a:hover,
.toc-links a:hover,
.route-card a:hover,
.related-card a:hover,
.footer-grid a:hover,
.article-section a:hover {
  color: var(--accent);
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-switcher a {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.lang-switcher a.active {
  background: var(--accent-soft);
  border-color: rgba(125, 211, 252, 0.26);
}

.header-cta,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.header-cta,
.primary-btn {
  color: #08111c;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  box-shadow: 0 18px 36px rgba(109, 140, 255, 0.24);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line-strong);
  color: var(--text);
}

.header-cta:hover,
.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-weight: 800;
}

.hero-grid,
.guide-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
  gap: 20px;
}

.hero-card,
.guide-copy,
.guide-points,
.section-block,
.route-card,
.step-card,
.faq-card,
.related-card,
.toc-box,
.article-box,
.cta-strip {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
}

.hero-card,
.guide-copy,
.guide-points,
.section-block,
.cta-strip {
  border-radius: var(--radius-xl);
}

.hero-main,
.guide-copy,
.article-box,
.section-block,
.cta-strip {
  padding: 24px;
}

.hero-side,
.guide-points,
.toc-box {
  padding: 22px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 0.83rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Segoe UI Variable", "Segoe UI", sans-serif;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2rem, 4vw, 4rem);
  max-width: 13ch;
}

h2 {
  font-size: clamp(1.45rem, 2.2vw, 2.3rem);
}

h3 {
  font-size: 1.06rem;
}

.hero-copy {
  margin: 16px 0 0;
  max-width: 64ch;
  color: var(--muted);
  font-size: 1.03rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.chip-grid,
.steps-grid,
.route-grid,
.faq-grid,
.related-grid,
.footer-grid {
  display: grid;
  gap: 16px;
}

.chip-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.chip-card {
  display: grid;
  gap: 8px;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(125, 211, 252, 0.18);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
}

.chip-card strong {
  font-size: 0.98rem;
}

.chip-card span,
.route-card p,
.step-card p,
.faq-card p,
.related-card p,
.side-list li,
.guide-points li,
.article-box p,
.cta-strip p,
.footer-grid p {
  color: var(--muted);
}

.hero-image {
  margin-top: 22px;
  border-radius: 22px;
  border: 1px solid rgba(125, 211, 252, 0.24);
}

.hero-side h2 {
  font-size: 1.35rem;
}

.side-list,
.guide-points ul {
  margin: 16px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 12px;
}

.side-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.side-meta span,
.guide-date {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(125, 211, 252, 0.12);
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 700;
}

.section-block {
  margin-top: 20px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.route-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.route-card,
.step-card,
.faq-card,
.related-card {
  padding: 18px;
  border-radius: var(--radius-lg);
}

.route-card h3,
.step-card h3,
.faq-card summary,
.related-card h3 {
  margin-bottom: 8px;
}

.route-card a,
.related-card a {
  display: inline-flex;
  margin-top: 10px;
  color: var(--accent);
  font-weight: 800;
}

.steps-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.faq-card {
  background: var(--card-strong);
}

.faq-card summary {
  cursor: pointer;
  list-style: none;
  font-weight: 800;
}

.faq-card summary::-webkit-details-marker {
  display: none;
}

.faq-card p {
  margin: 12px 0 0;
}

.guide-shell {
  display: grid;
  gap: 20px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(250px, 0.42fr) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.toc-box {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  border-radius: var(--radius-lg);
}

.toc-title {
  margin-bottom: 14px;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.84rem;
}

.toc-links {
  display: grid;
  gap: 12px;
}

.toc-links a {
  color: var(--text);
  font-weight: 600;
}

.article-box {
  border-radius: var(--radius-xl);
}

.article-section + .article-section {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid rgba(126, 180, 255, 0.14);
}

.article-section p {
  margin-top: 12px;
}

.article-section a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-section ul {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
  color: var(--muted);
}

.article-section li::marker {
  color: var(--warm);
}

.cta-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.related-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.site-footer {
  padding: 0 0 40px;
}

.footer-grid {
  grid-template-columns: minmax(0, 1.1fr) repeat(2, minmax(0, 0.8fr));
  padding: 22px 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.footer-grid h3 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.footer-grid a {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

@media (max-width: 960px) {
  .hero-grid,
  .guide-hero,
  .guide-layout,
  .route-grid,
  .steps-grid,
  .related-grid,
  .footer-grid,
  .chip-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .toc-box {
    position: static;
  }

  h1 {
    max-width: none;
  }
}

@media (max-width: 840px) {
  .brand-copy {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  .menu-wrap {
    position: fixed;
    inset: var(--header-h) 14px auto 14px;
    z-index: 15;
    display: grid;
    gap: 14px;
    padding: 18px;
    border-radius: 22px;
    border: 1px solid var(--line-strong);
    background: rgba(12, 19, 34, 0.97);
    box-shadow: var(--shadow);
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  body.menu-open .menu-wrap {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav,
  .lang-switcher {
    display: grid;
    gap: 12px;
  }

  .main-nav a,
  .lang-switcher a,
  .header-cta {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 68px;
  }

  .page-main {
    padding-top: 16px;
  }

  .topbar {
    min-height: var(--header-h);
  }

  .shell {
    width: min(calc(100% - 20px), var(--shell));
  }

  .hero-main,
  .hero-side,
  .guide-copy,
  .guide-points,
  .section-block,
  .article-box,
  .cta-strip,
  .footer-grid {
    padding: 18px;
  }

  .cta-strip {
    flex-direction: column;
    align-items: stretch;
  }

  .header-cta,
  .primary-btn,
  .secondary-btn {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }
}