@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('assets/fonts/inter-latin.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url('assets/fonts/source-serif-4-latin.woff2') format('woff2');
}

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-serif: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;

  --paper: #f4f5f4;
  --paper-deep: #e8eae9;
  --card: #fbfcfb;
  --rule: #dcdfdd;

  --ink: #1f2426;
  --ink-2: #383e40;
  --ink-3: #6e7274;

  --accent: #3b5c6b;
  --accent-deep: #28414c;
  --accent-soft: #d6dee2;

  --radius-sm: 6px;
  --radius-md: 10px;
  --maxw: 1080px;
  --maxw-narrow: 720px;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  background:
    radial-gradient(120% 90% at 50% 0%, var(--card) 0%, var(--paper) 55%, var(--paper-deep) 100%);
  color: var(--ink);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
p {
  margin: 0;
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--card);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  z-index: 10;
}
.skip-link:focus {
  left: 16px;
  top: 16px;
}

/* ---------- Header ---------- */
.site-header {
  padding-block: 28px;
}

.header-inner {
  display: flex;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--card);
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* ---------- Hero ---------- */
.hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding-block: 72px 96px;
}

.hero-inner {
  max-width: var(--maxw-narrow);
  text-align: center;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 9vw, 4.5rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero-lede {
  margin-top: 20px;
  font-size: clamp(1.125rem, 3vw, 1.375rem);
  color: var(--ink-2);
  text-wrap: balance;
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding-inline: 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    background-color 120ms ease,
    border-color 120ms ease;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--accent-deep);
  color: var(--card);
}
.btn-primary:hover {
  background: var(--accent);
}

.btn-ghost {
  background: var(--card);
  border-color: var(--rule);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--accent-soft);
  background: var(--paper);
}

/* ---------- Footer ---------- */
.site-footer {
  padding-block: 28px 36px;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
  color: var(--ink-3);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}

.site-footer a {
  color: var(--ink-2);
  text-decoration-color: var(--accent-soft);
  text-underline-offset: 3px;
}
.site-footer a:hover {
  color: var(--accent);
}