/* SynapStream Core — contemporary library theme */
:root {
  --color-ink: #1a2744;
  --color-ink-soft: #3d4f6f;
  --color-paper: #faf8f5;
  --color-paper-warm: #f3efe8;
  --color-accent: #c9a227;
  --color-accent-hover: #b08d1f;
  --color-blue: #5b8def;
  --color-blue-soft: #e8f0fd;
  --color-border: #ddd6cb;
  --color-success: #2d6a4f;
  --color-error: #9b2226;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(26, 39, 68, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 39, 68, 0.12);
  --transition: 0.25s ease;
  --max-width: 1140px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-paper);
}

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

a { color: var(--color-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  margin-top: 0;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.125rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; }

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-ink);
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-ink);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-paper);
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 0;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
}
.logo:hover { color: var(--color-accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  transition: var(--transition);
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a:not(.btn) {
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
  font-weight: 500;
}
.site-nav a:not(.btn):hover { color: var(--color-accent); }

/* Footer */
.site-footer {
  background: var(--color-ink);
  color: rgba(250, 248, 245, 0.85);
  padding: 3.5rem 0 0;
  margin-top: 4rem;
}
.site-footer a { color: rgba(250, 248, 245, 0.85); }
.site-footer a:hover { color: var(--color-accent); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-paper);
  margin-bottom: 0.75rem;
}
.footer-tagline { font-size: 0.9375rem; opacity: 0.85; }
.footer-links h3, .footer-contact h3 {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 1rem;
}
.footer-links ul { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-contact p { margin-bottom: 0.375rem; font-size: 0.9375rem; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  font-size: 0.8125rem;
  opacity: 0.7;
}
.footer-legal ul {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Hero variants */
.hero {
  padding: 4rem 0;
}
.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: var(--color-blue-soft);
  color: var(--color-blue);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}
.hero-lead {
  font-size: 1.125rem;
  color: var(--color-ink-soft);
  max-width: 42ch;
  margin-bottom: 1.75rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.875rem; }
.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.hero-compact {
  background: linear-gradient(135deg, var(--color-paper-warm) 0%, var(--color-blue-soft) 100%);
  padding: 3rem 0;
  text-align: center;
}
.hero-compact h1 { max-width: 18ch; margin-inline: auto 0; text-align: left; }
.hero-compact .hero-lead { text-align: left; margin-inline: 0; }

/* Sections */
.section { padding: 4rem 0; }
.section-alt { background: var(--color-paper-warm); }
.section-header { margin-bottom: 2.5rem; max-width: 640px; }
.section-header p { color: var(--color-ink-soft); margin-bottom: 0; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card-image img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.card-body { padding: 1.5rem; }
.card-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}
.card h3 { margin-bottom: 0.5rem; }
.card p { font-size: 0.9375rem; color: var(--color-ink-soft); margin-bottom: 1rem; }

/* Feature strip */
.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 2.5rem;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}
.feature-item h3 { font-size: 1rem; margin-bottom: 0.375rem; }
.feature-item p { font-size: 0.875rem; color: var(--color-ink-soft); margin: 0; }

/* Testimonials */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.testimonial {
  padding: 1.75rem;
  background: #fff;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-accent);
}
.testimonial blockquote {
  margin: 0 0 1rem;
  font-style: italic;
  color: var(--color-ink-soft);
}
.testimonial cite {
  font-style: normal;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px var(--color-blue-soft);
}
.form-group textarea { min-height: 140px; resize: vertical; }
.form-error {
  display: none;
  color: var(--color-error);
  font-size: 0.8125rem;
  margin-top: 0.375rem;
}
.form-group.is-invalid input,
.form-group.is-invalid select,
.form-group.is-invalid textarea { border-color: var(--color-error); }
.form-group.is-invalid .form-error { display: block; }

.form-status {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  display: none;
}
.form-status.is-success {
  display: block;
  background: #d8f3dc;
  color: var(--color-success);
}
.form-status.is-error {
  display: block;
  background: #fde8e8;
  color: var(--color-error);
}

/* Pricing */
.pricing-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.pricing-table th,
.pricing-table td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.pricing-table th {
  background: var(--color-paper-warm);
  font-family: var(--font-display);
}
.pricing-table tr:last-child td { border-bottom: none; }

/* Glossary */
.glossary-nav {
  columns: 2;
  column-gap: 2rem;
  margin-bottom: 2rem;
}
.glossary-term {
  break-inside: avoid;
  padding: 1.25rem;
  margin-bottom: 1rem;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.glossary-term dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: 0.375rem;
}
.glossary-term dd { margin: 0; color: var(--color-ink-soft); font-size: 0.9375rem; }

/* Article */
.article-header { margin-bottom: 2rem; }
.article-meta {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-bottom: 1rem;
}
.article-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2rem;
}
.article-cover img { width: 100%; aspect-ratio: 21/9; object-fit: cover; }
.article-body h2 { margin-top: 2rem; }
.article-body ul, .article-body ol { margin-bottom: 1rem; padding-left: 1.5rem; }

/* Breadcrumb */
.breadcrumb {
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  margin-bottom: 1.5rem;
  padding-top: 1.5rem;
}
.breadcrumb a { color: var(--color-ink-soft); }

/* 404 */
.page-404 {
  text-align: center;
  padding: 6rem 0;
}
.page-404 h1 { font-size: 6rem; color: var(--color-accent); margin-bottom: 0.5rem; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 1.25rem;
  transform: translateY(100%);
  transition: transform 0.4s ease;
  box-shadow: 0 -4px 24px rgba(0,0,0,0.2);
}
.cookie-banner.is-visible { transform: translateY(0); }
.cookie-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max-width);
  margin-inline: auto;
  width: min(100% - 2rem, var(--max-width));
}
.cookie-banner p { margin: 0; font-size: 0.9375rem; flex: 1; min-width: 240px; }
.cookie-banner a { color: var(--color-accent); }
.cookie-actions { display: flex; gap: 0.75rem; }
.cookie-actions .btn-outline {
  border-color: rgba(255,255,255,0.4);
  color: var(--color-paper);
}
.cookie-actions .btn-outline:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-paper);
}

/* Legal pages */
.legal-content { max-width: 720px; padding: 2rem 0 4rem; }
.legal-content h2 { margin-top: 2rem; font-size: 1.375rem; }
.legal-content ul { padding-left: 1.5rem; }

/* Cookies table */
.cookies-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}
.cookies-table th, .cookies-table td {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
}
.cookies-table th { background: var(--color-paper-warm); }

/* Script error */
.script-error {
  background: #fde8e8;
  color: var(--color-error);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin: 0.5rem 0;
}

/* Page layout helpers */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.content-narrow { max-width: 720px; }

/* Responsive */
@media (max-width: 900px) {
  .hero-split, .two-col, .footer-grid, .feature-strip { grid-template-columns: 1fr; }
  .glossary-nav { columns: 1; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    display: none;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; }
  .site-nav .btn { width: 100%; text-align: center; }
  .header-inner { position: relative; }
}