:root {
  
  --c-bg: #f3f6f6;
  --c-bg-alt: #12313b;
  --c-fg: #12313b;
  --c-fg-on-alt: #f3f6f6;
  --c-muted: #5c7a80;
  --c-muted-on-alt: #a9c0c4;
  --c-accent: #2e8b8b;
  --c-accent-dim: #1f6b6b;
  --c-line: #cdd9d9;
  --c-line-on-alt: #294951;
  --c-surface: #ffffff;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1.25rem;
  --space-4: 2rem;
  --space-5: 3.25rem;
  --space-6: 5.25rem;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --font-display: "Zilla Slab", "Roboto Slab", Georgia, serif;
  --font-body: "Work Sans", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: auto;
}

body {
  background: var(--c-bg);
  color: var(--c-fg);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-3);
}

@media (min-width: 641px) {
  .container {
    padding-inline: var(--space-4);
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--c-accent);
  color: var(--c-fg-on-alt);
  padding: var(--space-1) var(--space-2);
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.site-header {
  border-bottom: 1px solid var(--c-line);
  background: var(--c-surface);
  position: relative;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.brand__logo {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 1rem + 0.4vw, 1.4rem);
  letter-spacing: 0.01em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--c-accent);
  color: var(--c-fg-on-alt);
  border-color: var(--c-accent);
}

.btn-secondary {
  background: transparent;
  color: var(--c-fg);
  border-color: var(--c-fg);
}

.section--alt .btn-secondary {
  color: var(--c-fg-on-alt);
  border-color: var(--c-fg-on-alt);
}

.site-footer {
  background: var(--c-bg-alt);
  color: var(--c-fg-on-alt);
  padding-block: var(--space-5) var(--space-4);
}

.site-footer .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 641px) {
  .site-footer .container {
    grid-template-columns: 1.3fr 1fr 1fr;
  }
}

.footer-brand .brand__name {
  color: var(--c-fg-on-alt);
}

.footer-brand p {
  color: var(--c-muted-on-alt);
  margin-top: var(--space-2);
  max-width: 320px;
}

.footer-col h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted-on-alt);
  margin-bottom: var(--space-2);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-col a:hover {
  color: var(--c-accent);
}

.footer-bottom {
  border-top: 1px solid var(--c-line-on-alt);
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  color: var(--c-muted-on-alt);
  font-size: 0.85rem;
}

.footer-bottom .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  grid-template-columns: none;
}

.page-header { padding-block: var(--space-6); }
.page-main { padding-block: var(--space-6); }
.hero { padding-block: var(--space-6); }