:root {
  --font-serif: "EB Garamond", Georgia, "Times New Roman", serif;
  --font-sans: "Lato", system-ui, -apple-system, sans-serif;
  --font-display: "Rubik", "Lato", system-ui, sans-serif;

  --brand-red: #d2232a;
  --brand-red-dark: #b01c22;
  --brand-navy: #1b365d;
  --brand-navy-mid: #244874;
  --brand-navy-soft: #2c5685;
  --brand-blue: #0369a1;
  --brand-gold: #b28a4a;

  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --text-muted: #334155;
  --text-faint: #64748b;
  --border: #e2e8f0;
  --accent: var(--brand-red);
  --accent-soft: var(--brand-red-dark);
  --link: var(--brand-blue);
  --link-hover: #025e91;
  --max: 720px;
  --nav-max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--link-hover);
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 45% at 0% 0%, rgba(227, 30, 36, 0.08) 0%, transparent 55%),
    radial-gradient(ellipse 55% 40% at 100% 5%, rgba(3, 105, 161, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
  pointer-events: none;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, #ffffff 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 3px solid var(--brand-red);
  box-shadow: 0 2px 16px rgba(27, 54, 93, 0.06);
}

.header-inner {
  max-width: var(--nav-max);
  margin: 0 auto;
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}

.brand:hover {
  opacity: 0.92;
}

.brand-logo {
  display: block;
  height: 4.25rem;
  width: auto;
  object-fit: contain;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.15rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-ghost {
  color: var(--brand-navy);
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--brand-navy) 28%, transparent);
}

.btn-ghost:hover {
  color: var(--brand-navy);
  background: #eff6ff;
  border-color: var(--brand-navy);
}

.btn-primary {
  color: #fff;
  background: var(--brand-red);
  border: 1px solid var(--brand-red);
}

.btn-primary:hover {
  background: var(--brand-red-dark);
  color: #fff;
  border-color: var(--brand-red-dark);
}

/* Hero */
.hero {
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(135deg, var(--brand-navy) 0%, var(--brand-navy-mid) 55%, var(--brand-navy-soft) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(227, 30, 36, 0.28) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 2.75rem;
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fca5a5;
  margin-bottom: 0.85rem;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.35rem, 5vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.12;
  color: #fff;
  margin-bottom: 0.85rem;
}

.hero-lead {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.78);
  max-width: 36rem;
  margin-bottom: 1.5rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

.meta-row strong {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
}

/* Layout */
.layout {
  max-width: var(--nav-max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* TOC */
.toc {
  position: sticky;
  top: 5.5rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  border-top: 3px solid var(--brand-red);
  box-shadow: 0 4px 20px rgba(15, 35, 68, 0.04);
}

.toc-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-navy);
  margin-bottom: 0.85rem;
}

.toc nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc a {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
  line-height: 1.4;
  padding: 0.3rem 0.5rem;
  margin: 0 -0.5rem;
  border-radius: 0.35rem;
  border-left: 2px solid transparent;
  padding-left: calc(0.5rem - 2px);
}

.toc a:hover {
  color: var(--brand-navy);
  background: #eff6ff;
  border-left-color: var(--brand-red);
}

/* Content */
.content {
  max-width: var(--max);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 2rem 2.25rem 2.5rem;
  box-shadow: 0 4px 24px rgba(15, 35, 68, 0.04);
}

.content > section + section {
  margin-top: 2.25rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--border);
}

.content h2 {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 0.85rem;
  scroll-margin-top: 5.5rem;
  color: var(--brand-navy);
}

.content h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 1.35rem 0 0.55rem;
  scroll-margin-top: 5.5rem;
  color: var(--brand-navy-mid);
}

.content p {
  font-family: var(--font-sans);
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

.content p:last-child {
  margin-bottom: 0;
}

.content ul,
.content ol {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.content li {
  margin-bottom: 0.45rem;
  padding-left: 0.25rem;
}

.content li::marker {
  color: var(--brand-red);
}

.content strong {
  color: var(--text);
  font-weight: 700;
}

.notice {
  background: linear-gradient(135deg, #fef2f2 0%, #fff7ed 100%);
  border: 1px solid #fecaca;
  border-left: 3px solid var(--brand-red);
  border-radius: 0.65rem;
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.notice strong {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--brand-red);
  font-weight: 600;
}

.contact-block {
  background: linear-gradient(135deg, #eff6ff 0%, #f8fafc 100%);
  border: 1px solid #bfdbfe;
  border-left: 3px solid var(--brand-blue);
  border-radius: 0.65rem;
  padding: 1.25rem 1.35rem;
  margin-top: 1rem;
}

.contact-block p {
  margin-bottom: 0.4rem;
}

.contact-block p:last-child {
  margin-bottom: 0;
}

.contact-block strong {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--brand-navy);
}

/* Footer */
.site-footer {
  border-top: 3px solid var(--brand-red);
  background: #fff;
  color: var(--text-muted);
}

.footer-inner {
  max-width: var(--nav-max);
  margin: 0 auto;
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  height: 3.5rem;
  width: auto;
  object-fit: contain;
  display: block;
}

.footer-inner p {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-faint);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.footer-links a {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--brand-navy);
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--brand-red);
}

.footer-links a[aria-current="page"] {
  color: var(--brand-red);
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .toc {
    position: static;
  }

  .toc nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25rem 0.75rem;
  }

  .content {
    padding: 1.5rem 1.25rem 2rem;
  }

  .hero-inner {
    padding: 2.5rem 1.5rem 2rem;
  }

  .btn-ghost {
    display: none;
  }

  .brand-logo {
    height: 3.5rem;
  }

  .footer-brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .toc nav {
    grid-template-columns: 1fr;
  }

  .brand-logo {
    height: 3rem;
  }
}