/* Rutherford DNA Project — shared styles */

:root {
  --color-primary: #1a4d6d;
  --color-primary-dark: #0f3347;
  --color-accent: #2d8a6e;
  --color-accent-light: #e8f4f0;
  --color-bg: #f7f9fb;
  --color-surface: #ffffff;
  --color-text: #2c3e50;
  --color-text-muted: #5a6c7d;
  --color-border: #dde4ea;
  --font-heading: "Georgia", "Times New Roman", serif;
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 3px rgba(26, 77, 109, 0.08);
  --shadow-md: 0 4px 20px rgba(26, 77, 109, 0.12);
  --radius: 8px;
  --max-width: 960px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Header & navigation */

.site-header {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: 0;
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.75rem 1.5rem 0;
}

.site-title {
  margin: 0 0 0.25rem;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-tagline {
  margin: 0;
  font-size: 0.9375rem;
  opacity: 0.85;
  font-weight: 400;
}

.site-nav {
  max-width: var(--max-width);
  margin: 1.25rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  gap: 0.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.site-nav a {
  display: inline-block;
  padding: 0.875rem 1.25rem;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.site-nav a:hover {
  color: #fff;
}

.site-nav a.active {
  color: #fff;
  border-bottom-color: var(--color-accent);
}

/* Main content */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
}

.hero {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-accent);
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-primary-dark);
  line-height: 1.3;
}

.hero h1 a,
.hero h1 a:link,
.hero h1 a:visited {
  color: var(--color-primary-dark);
  text-decoration: none;
}

.hero h1 a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.hero .lead {
  margin: 0;
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

.content-section {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.content-section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-size: 1.375rem;
  color: var(--color-primary);
}

.content-section p {
  margin: 0 0 1rem;
}

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

.content-date {
  margin-top: 1.25rem !important;
  margin-bottom: 0 !important;
  font-size: 0.875rem;
  font-style: italic;
  color: var(--color-text-muted);
}

.content-section h2 a {
  color: var(--color-accent);
  text-decoration: none;
}

.content-section h2 a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.haplogroup-lineage-label {
  margin: 1.5rem 0 0.5rem !important;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.haplogroup-lineage-label a {
  color: var(--color-accent);
  text-decoration: none;
}

.haplogroup-lineage-label a:hover {
  text-decoration: underline;
}

.haplogroup-lineage {
  margin: 0 !important;
  padding: 1rem 1.25rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  line-height: 1.8;
  font-family: "Consolas", "Courier New", monospace;
  word-break: break-word;
}

.haplogroup-lineage a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
}

.haplogroup-lineage a:hover {
  text-decoration: underline;
}

.haplogroup-lineage a.haplogroup-lineage-key {
  color: #1a5c47;
  font-weight: 700;
}

.haplogroup-lineage a.haplogroup-lineage-key:hover {
  color: #134436;
}

.haplogroup-lineage a.haplogroup-lineage-red {
  color: #b91c1c;
  font-weight: 700;
}

.haplogroup-lineage a.haplogroup-lineage-red:hover {
  color: #991b1b;
}

.back-link {
  margin: 0;
  font-size: 0.9375rem;
}

.back-link a {
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: none;
}

.back-link a:hover {
  text-decoration: underline;
}

.highlight-box {
  background: var(--color-accent-light);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
  border: 1px solid rgba(45, 138, 110, 0.2);
}

.highlight-box p {
  margin: 0;
  color: var(--color-primary-dark);
}

.content-section a,
.highlight-box a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
}

.content-section a:not(.card):hover,
.highlight-box a:hover {
  text-decoration: underline;
}

.content-section a.card:hover,
.content-section a.card:focus-visible {
  text-decoration: none;
}

.content-section a.card:hover h3,
.content-section a.card:focus-visible h3 {
  text-decoration: underline;
}

.content-section a em {
  font-style: italic;
  color: inherit;
}

/* Pricing table */

.price-table {
  width: 100%;
  max-width: 420px;
  margin: 1.25rem 0 0.75rem;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.price-table th,
.price-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.price-table th {
  background: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
}

.price-table td:last-child,
.price-table th:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.price-table tbody tr:last-child td {
  border-bottom: none;
}

.price-table-recommended td:first-child::after {
  content: " (recommended)";
  font-weight: 400;
  font-size: 0.8125rem;
  color: var(--color-accent);
}

.price-table-recommended td:first-child {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.price-note {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem !important;
}

.content-figure {
  margin: 1.75rem 0 0;
  text-align: center;
}

.content-figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.content-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.figure-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0 0;
}

.figure-grid .content-figure {
  margin: 0;
}

.figure-grid-equal {
  grid-template-columns: repeat(2, minmax(0, 288px));
  justify-content: center;
}

.figure-grid-equal .content-figure img {
  width: 288px;
  max-width: 100%;
  height: 173px;
  object-fit: cover;
}

.figure-single {
  max-width: 480px;
  margin: 1.75rem auto 0;
}

.figure-single .content-figure {
  margin: 0;
}

.content-quote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.content-quote p {
  margin: 0 0 1rem;
  font-style: italic;
  color: var(--color-primary-dark);
}

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

.content-quote-source {
  font-style: normal;
}

.source-citation {
  margin: 1rem 0 0.75rem !important;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.content-attribution {
  margin-top: 1.5rem !important;
  margin-bottom: 0 !important;
  font-weight: 500;
  color: var(--color-primary);
}

.references-list {
  margin: 0;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.references-list li {
  margin-bottom: 0.75rem;
}

.references-list li:last-child {
  margin-bottom: 0;
}

.references-list sup a,
.content-section sup a {
  font-size: 0.75em;
  text-decoration: none;
  font-weight: 600;
}

.content-section sup a:hover {
  text-decoration: underline;
}

.content-quote ul {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
}

.content-quote li {
  margin-bottom: 0.35rem;
}

.hero .lead a {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
}

.hero .lead a:hover {
  text-decoration: underline;
}

.spellings-key {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem !important;
}

.spellings-table-wrap {
  overflow-x: auto;
  margin-top: 1.5rem;
}

.spellings-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 0.8125rem;
  line-height: 1.55;
}

.spellings-table td {
  border: none;
  padding: 0.15rem 0.875rem 0.15rem 0;
  vertical-align: top;
  width: 16.666%;
  color: var(--color-text);
}

.spellings-table tr td:empty {
  padding: 0;
}

@media (max-width: 600px) {
  .spellings-table {
    font-size: 0.75rem;
  }
}

/* Feature cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.card {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary);
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* Contact page */

.contact-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  text-align: center;
  max-width: 520px;
  margin: 0 auto;
}

.contact-card h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.875rem;
  color: var(--color-primary-dark);
}

.contact-card .subtitle {
  margin: 0 0 2rem;
  color: var(--color-text-muted);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  background: var(--color-accent-light);
  border: 1px solid rgba(45, 138, 110, 0.25);
  border-radius: var(--radius);
  padding: 1rem 1.75rem;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-primary-dark);
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}

.contact-email:hover {
  background: #d4ede4;
  transform: translateY(-1px);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.75rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.contact-link:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.contact-link svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.contact-actions-label {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.contact-email svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact-note {
  margin-top: 2rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Open letter page */

.letter-body {
  max-width: 720px;
}

.letter-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.print-button {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-primary-dark);
  background: var(--color-surface);
  border: 1px solid rgba(45, 138, 110, 0.35);
  border-radius: var(--radius);
  padding: 0.625rem 1.25rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

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

@media print {
  .site-header,
  .site-footer,
  .print-button,
  .letter-actions p {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  main {
    padding: 0;
    max-width: none;
  }

  .hero,
  .content-section {
    box-shadow: none;
    border: none;
    padding: 0;
    margin: 0;
  }

  .hero {
    border-left: none;
    margin-bottom: 1.5rem;
  }
}

/* Footer */

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.875rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* Responsive */

@media (max-width: 600px) {
  .hero {
    padding: 1.75rem 1.25rem;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .content-section {
    padding: 1.5rem 1.25rem;
  }

  .site-nav a {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }
}