:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0052cc;
  --accent-hover: #0747a6;
  --cta-bg: #2563eb;
  --cta-hover: #1d4ed8;
  --max-w: 1050px;
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f19;
    --bg-alt: #131b2e;
    --border: #1e293b;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --cta-bg: #0284c7;
    --cta-hover: #0369a1;
  }
}

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

html {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.shell {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.shell-narrow {
  width: 100%;
  max-width: 800px;
  margin-inline: auto;
  padding-inline: 1.25rem;
}

header, footer {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.nav-bar {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1rem;
  padding-block: 0.75rem;
}

.brand-link {
  display: grid;
  align-items: center;
  text-decoration: none;
}

.brand-logo-svg {
  width: 200px;
  height: 46px;
  display: block;
}

nav {
  display: grid;
  justify-content: end;
}

nav ul {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
}

@media (max-width: 640px) {
  .nav-bar { grid-template-columns: 1fr; }
  nav { justify-content: start; }
  nav ul {
    grid-auto-flow: row;
    grid-template-columns: repeat(auto-fit, minmax(70px, max-content));
  }
}

a.nav-link, a.lang-toggle, a.card-link {
  display: grid;
  place-items: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  color: var(--text);
  transition: color 0.15s ease, background-color 0.15s ease;
}

a.nav-link:hover, a.nav-link[aria-current="page"] {
  color: var(--accent);
}

a.nav-btn {
  display: grid;
  place-items: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  background: var(--cta-bg);
  color: #ffffff;
  transition: background-color 0.15s ease;
}

a.nav-btn:hover {
  background: var(--cta-hover);
  color: #ffffff;
}

a.nav-btn-large {
  padding: 0.85rem 2rem;
  font-size: 1.25rem;
  justify-self: center;
}

a.lang-toggle {
  border: 1px solid var(--border);
  font-size: 0.85rem;
}

a.card-link {
  display: inline;
  color: var(--accent);
  padding: 0;
}

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

main {
  padding-block: 3rem;
}

.hero {
  margin-bottom: 2.5rem;
}

.hero-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 750px;
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 1rem;
}

@media (max-width: 640px) {
  .hero-actions {
    grid-auto-flow: row;
  }
}

/* CSS Grid Level 2 with Subgrid */
.grid-subgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.feature-card {
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 4;
  gap: 0.5rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.feature-card h3 { font-size: 1.2rem; }
.feature-card p { color: var(--muted); font-size: 0.95rem; }
.card-meta { font-size: 0.75rem; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }

.conversion-banner {
  margin-top: 3.5rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1.5rem;
}

@media (max-width: 640px) {
  .conversion-banner { grid-template-columns: 1fr; }
}

.search-field {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-block: 1rem 1.5rem;
}

.search-field:focus {
  outline: 2px solid var(--accent);
}

/* Clean 4-Column Footer Layout (Pure CSS Grid) */
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-col {
  display: grid;
  gap: 0.5rem;
  align-content: start;
}

.footer-col h4 {
  font-size: 1rem;
  color: var(--text);
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 0.35rem;
}

.footer-bottom {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .footer-bottom { grid-template-columns: 1fr; }
}

/* Privacy & Audit Block */
.audit-box {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
  margin-block: 1.5rem;
}

.audit-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  line-height: 1.7;
}

.audit-list strong {
  color: var(--accent);
}

/* Print Styles */
@media print {
  header, footer, .no-print, .conversion-banner, .nav-bar { display: none; }
  body, html { background: #ffffff; color: #000000; font-size: 11pt; line-height: 1.4; }
  .shell, .shell-narrow { max-width: 100%; border: none; padding: 0; margin: 0; background: transparent; display: block; }
  a { text-decoration: none; color: #000000; }
}

footer {
  padding-block: 2.5rem;
  font-size: 0.9rem;
}