/* ==========================================================================
   Swiss Will — placeholder site stylesheet
   No framework. Plain CSS with custom properties and light/dark support.
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------- */
:root {
  color-scheme: light dark;

  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-contrast: #ffffff;
  --color-border: #e2e8f0;

  --max-width: 64rem;
  --radius: 0.5rem;
  --space: 1rem;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.05);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-text: #e2e8f0;
    --color-muted: #94a3b8;
    --color-accent: #60a5fa;
    --color-accent-contrast: #0f172a;
    --color-border: #1e293b;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.35);
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.6;
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1,
h2,
h3 {
  line-height: 1.25;
  font-weight: 700;
}

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

a:hover,
a:focus-visible {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

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

/* Visually-hidden but accessible */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  transition: top 0.15s ease;
  z-index: 100;
}

.skip-link:focus {
  top: 0.5rem;
}

/* --- Layout containers --------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

main {
  flex: 1 0 auto;
  padding-block: 2.5rem;
}

section {
  margin-block: 2.5rem;
}

.lead {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 42rem;
}

/* --- Site header / navigation ------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
}

.brand img {
  width: 1.75rem;
  height: 1.75rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.4rem 0.6rem;
  color: var(--color-text);
  cursor: pointer;
  font-size: 1rem;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  color: var(--color-muted);
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-text);
  background-color: var(--color-surface);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--color-accent);
  background-color: var(--color-surface);
}

/* --- Hero ---------------------------------------------------------------- */
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 0.75rem;
}

.hero .lead {
  font-size: 1.25rem;
}

.badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 1rem;
}

/* --- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-accent-contrast);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  text-decoration: none;
  filter: brightness(1.05);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
  text-decoration: none;
  background-color: var(--color-surface);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* --- Cards / grid -------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  padding: 0;
  margin: 0;
  list-style: none;
}

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0 0 1rem;
  color: var(--color-muted);
  flex: 1;
}

.card a {
  font-weight: 600;
}

/* --- Callout / placeholder note ----------------------------------------- */
.note {
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  padding: 0.85rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-muted);
}

.note strong {
  color: var(--color-text);
}

/* --- Site footer --------------------------------------------------------- */
.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  padding-block: 1.5rem;
}

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

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

/* --- Responsive nav ------------------------------------------------------ */
@media (max-width: 40rem) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    padding: 0.5rem 1.25rem 1rem;
    gap: 0.1rem;
  }

  .site-nav a {
    padding: 0.7rem 0.75rem;
  }
}