:root {
  --bg: #f6fbfc;
  --surface: #ffffff;
  --surface-soft: #f1f7f8;
  --text: #17323a;
  --muted: #557078;
  --border: #d8e7ea;
  --border-strong: #bfd4da;
  --accent: #0f5563;
  --accent-strong: #0b4250;
  --accent-soft: #e3f2f5;
  --accent-soft-text: #0d5c6d;
  --warning-bg: #fff6e9;
  --warning-border: #f1d5a8;
  --warning-text: #7e5310;
  --shadow: 0 14px 34px rgba(15, 85, 99, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1120px;
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a:focus-visible,
summary:focus-visible {
  outline: 3px solid #84d7e7;
  outline-offset: 3px;
  border-radius: 10px;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  background: rgba(246, 251, 252, 0.92);
  backdrop-filter: blur(12px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.6rem 1.1rem;
  font-size: 0.95rem;
  color: var(--muted);
  flex: 0 0 100%;
  width: 100%;
  order: 2;
  flex-wrap: wrap;
  white-space: normal;
}

.nav a:hover,
.inline-link:hover,
.source-link:hover {
  color: var(--accent);
}

.nav a {
  flex: 0 0 auto;
}

.nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

.main {
  padding-bottom: 2rem;
}

.hero,
.page-hero {
  padding: 4rem 0 2.5rem;
}

.hero-grid,
.two-col,
.card-grid,
.check-grid,
.link-grid {
  display: grid;
  gap: 1.25rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-soft-text);
  padding: 0.45rem 0.85rem;
  font-size: 0.92rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h1 {
  margin-top: 1rem;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.3rem);
}

h3 {
  font-size: 1.08rem;
}

p {
  margin: 0;
}

.lead {
  margin-top: 1rem;
  max-width: 48rem;
  color: var(--muted);
  font-size: 1.15rem;
}

.meta-row {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.96rem;
  font-weight: 600;
}

.button-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.92rem 1.3rem;
  border-radius: 999px;
  font-weight: 700;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.button {
  background: var(--accent);
  color: #fff;
}

.button:hover {
  background: var(--accent-strong);
}

.button-secondary {
  border: 1px solid var(--border-strong);
  color: var(--accent);
  background: transparent;
}

.button-secondary:hover {
  background: var(--accent-soft);
}

.section {
  padding: 1.25rem 0 3.5rem;
}

.section-copy,
.lede-copy {
  margin-top: 1rem;
  max-width: 52rem;
  color: var(--muted);
}

.card,
.notice,
.warning-card,
.source-panel,
.disclaimer,
.nav-panel,
.timeline-panel,
.emphasis-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.card,
.nav-panel {
  padding: 1.35rem;
}

.notice,
.warning-card,
.source-panel,
.disclaimer,
.timeline-panel,
.emphasis-panel {
  padding: 1.55rem;
}

.notice {
  background: linear-gradient(180deg, #ffffff 0%, #f3fafb 100%);
}

.notice-label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.card p,
.notice p,
.source-panel p,
.disclaimer p,
details p,
.nav-panel p {
  color: var(--muted);
}

.fact-card {
  border-top: 4px solid var(--accent);
}

.soft-card {
  background: var(--surface-soft);
}

.warning-card {
  background: var(--warning-bg);
  border-color: var(--warning-border);
}

.warning-card h3,
.warning-card p {
  color: var(--warning-text);
}

.editorial-note {
  margin-top: 1rem;
  font-size: 0.96rem;
  color: var(--muted);
}

.timeline-panel {
  background: linear-gradient(180deg, #ffffff 0%, #f2fafb 100%);
}

.timeline-intro {
  margin-top: 0.9rem;
  color: var(--muted);
  max-width: 46rem;
}

.timeline {
  position: relative;
  margin-top: 1.4rem;
  padding-left: 1.1rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 2px;
  background: linear-gradient(180deg, var(--border-strong) 0%, var(--accent-soft-text) 100%);
}

.timeline-item {
  position: relative;
  padding: 0 0 1.3rem 1.35rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -0.06rem;
  top: 0.32rem;
  width: 0.82rem;
  height: 0.82rem;
  border-radius: 999px;
  background: var(--surface);
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 5px rgba(15, 85, 99, 0.08);
}

.timeline-date {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-title {
  margin-top: 0.3rem;
  font-size: 1.08rem;
  font-weight: 800;
}

.timeline-copy {
  margin-top: 0.35rem;
  color: var(--muted);
}

.section-cta {
  margin-top: 1.35rem;
}

.emphasis-panel {
  background: linear-gradient(180deg, #f5fbfc 0%, #ffffff 100%);
  border-color: var(--border-strong);
}

.emphasis-copy {
  margin-top: 0.9rem;
  max-width: 54rem;
  color: var(--muted);
}

.review-note {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.review-note p + p {
  margin-top: 0.45rem;
}

.list,
.checklist,
.source-list,
.related-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  color: var(--muted);
}

.list li,
.checklist li,
.source-list li,
.related-list li {
  position: relative;
  padding-left: 1.2rem;
}

.list li + li,
.checklist li + li,
.source-list li + li,
.related-list li + li {
  margin-top: 0.75rem;
}

.list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #1a7b55;
  font-weight: 800;
}

.source-list li::before,
.related-list li::before {
  content: "↗";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

.source-preview {
  margin-top: 0.25rem;
  padding-left: 1.2rem;
  color: var(--muted);
  font-size: 0.97rem;
}

.faq-group {
  margin-top: 1.5rem;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

details {
  padding: 1.25rem 1.35rem;
}

details + details {
  border-top: 1px solid var(--border);
}

summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

summary::-webkit-details-marker {
  display: none;
}

.summary-icon {
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1;
}

details[open] .summary-icon {
  transform: rotate(45deg);
}

details p {
  margin-top: 0.85rem;
}

.source-link,
.inline-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.compare-table {
  width: 100%;
  margin-top: 1.35rem;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.compare-table th,
.compare-table td {
  padding: 1rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

.compare-table th {
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 800;
}

.compare-table td {
  color: var(--muted);
}

.compare-table tr:last-child td {
  border-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-inner {
  flex-direction: column;
  align-items: flex-start;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 1.4rem 0 1.8rem;
}

.footer-inner p {
  max-width: 56rem;
}

.footer-inner p + p {
  margin-top: 0.45rem;
}

@media (min-width: 700px) {
  .button-row {
    flex-direction: row;
  }

  .card-grid.two-up,
  .two-col,
  .check-grid,
  .link-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 920px) {
  .nav {
    justify-content: flex-end;
    gap: 0.7rem 1.2rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.92fr);
    align-items: start;
  }

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

  .card-grid.four-up {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .notice,
  .warning-card,
  .source-panel,
  .disclaimer,
  .timeline-panel,
  .emphasis-panel {
    padding: 1.8rem;
  }

  .footer-inner {
    flex-direction: row;
    align-items: flex-start;
  }
}