/* ==========================================================================
   Design tokens
   ========================================================================== */

:root {
  --background: oklch(0.9851 0 0);
  --foreground: oklch(0.1613 0.0107 248.5062);
  --card: oklch(0.95 0.004 201.49);
  --muted: oklch(0.9658 0.0123 215.8228);
  --muted-foreground: oklch(0.2889 0.0148 244.1658);
  --primary: #006591;
  --border: oklch(0.9219 0 0);

  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-heading: "Space Grotesk", var(--font-sans);

  --radius: 0.25rem;
  --transition: 150ms ease;

  color-scheme: light;
}

:root.dark {
  --background: oklch(0.1613 0.0107 248.5062);
  --foreground: oklch(0.9851 0 0);
  --card: oklch(0.2103 0.0191 252.088);
  --muted: oklch(0 0.0148 244.1658);
  --muted-foreground: oklch(0.9152 0.0416 255.0087);
  --primary: #0ea5e9;
  --border: oklch(0.2768 0 0);

  color-scheme: dark;
}

/* ==========================================================================
   Base
   ========================================================================== */

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
}

/* Inline icons are outline-style and inherit the text color. */
svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.site-footer a {
  transition: color var(--transition);
}

.site-footer a:hover {
  color: var(--foreground);
}

/* ==========================================================================
   Components
   ========================================================================== */

/* Brand ---------------------------------------------------------------- */

.brand {
  display: flex;
  align-items: center;
}

/* Theme toggle --------------------------------------------------------- */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 2px);
  background: transparent;
  color: var(--muted-foreground);
  cursor: pointer;
  transition:
    color var(--transition),
    background-color var(--transition);
}

.theme-toggle:hover {
  background: var(--muted);
  color: var(--foreground);
}

.icon-sun,
.dark .icon-moon {
  display: none;
}

.dark .icon-sun {
  display: block;
}

/* Hero ----------------------------------------------------------------- */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

.hero__logo {
  margin-bottom: 0.5rem;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 1.875rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.hero p {
  color: var(--muted-foreground);
  line-height: 1.625;
  text-wrap: pretty;
}

/* Cards ---------------------------------------------------------------- */

.cards {
  display: grid;
  gap: 0.75rem;
  width: 100%;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  transition:
    border-color var(--transition),
    background-color var(--transition);
}

.card:hover {
  border-color: color-mix(in oklch, var(--primary) 40%, transparent);
  background: color-mix(in oklch, var(--muted) 50%, transparent);
}

.card__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
}

.card__icon {
  flex-shrink: 0;
  color: var(--primary);
  stroke-width: 1.75;
}

.card p {
  font-size: 0.875rem;
  line-height: 1.625;
  color: var(--muted-foreground);
}

/* ==========================================================================
   Scrollbar
   ========================================================================== */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary) var(--background);
}