/* Material 3 — baseline purple, light & dark */

@font-face {
  font-family: Roboto;
  src: url(/fonts/roboto-400.woff2) format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: Roboto;
  src: url(/fonts/roboto-500.woff2) format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;

  --primary: #6750a4;
  --on-primary: #ffffff;
  --primary-container: #eaddff;
  --on-primary-container: #21005d;
  --secondary-container: #e8def8;
  --on-secondary-container: #1d192b;
  --surface: #fef7ff;
  --surface-container-low: #f7f2fa;
  --surface-container: #f3edf7;
  --on-surface: #1d1b20;
  --on-surface-variant: #49454f;
  --outline-variant: #cac4d0;
  --error: #b3261e;

  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15);
  --font: Roboto, "Google Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #d0bcff;
    --on-primary: #381e72;
    --primary-container: #4f378b;
    --on-primary-container: #eaddff;
    --secondary-container: #4a4458;
    --on-secondary-container: #e8def8;
    --surface: #141218;
    --surface-container-low: #1d1b20;
    --surface-container: #211f26;
    --on-surface: #e6e0e9;
    --on-surface-variant: #cac4d0;
    --outline-variant: #49454f;
    --error: #f2b8b5;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.5), 0 1px 3px 1px rgba(0, 0, 0, 0.25);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--primary-container); color: var(--on-primary-container); }

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.icon { flex: none; }

/* ---- page shell ---- */

.page {
  flex: 1;
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2rem;
}

/* ---- hero ---- */

.hero { text-align: center; padding: 2.5rem 0 3rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  height: 1.75rem;
  padding: 0 0.875rem;
  border-radius: 1rem;
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.5px;
  overflow-wrap: anywhere;
}

.hero p {
  max-width: 30rem;
  margin: 0 auto 1.75rem;
  color: var(--on-surface-variant);
  font-size: 1.0625rem;
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ---- buttons (M3: filled / tonal / text) ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 2.5rem;
  padding: 0 1.5rem;
  border: 0;
  border-radius: 1.25rem;
  font: 500 0.875rem/1 var(--font);
  letter-spacing: 0.1px;
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.2s ease, background-color 0.2s ease;
}
.btn .icon { width: 1.125rem; height: 1.125rem; }

.btn-filled { background: var(--primary); color: var(--on-primary); }
.btn-filled:hover {
  box-shadow: var(--shadow-1);
  background: var(--primary);
  background: color-mix(in srgb, var(--on-primary) 8%, var(--primary));
}

.btn-tonal { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn-tonal:hover {
  box-shadow: var(--shadow-1);
  background: var(--secondary-container);
  background: color-mix(in srgb, var(--on-secondary-container) 8%, var(--secondary-container));
}

.btn-text { padding: 0 0.75rem; background: transparent; color: var(--primary); }
.btn-text:hover { background: color-mix(in srgb, var(--primary) 8%, transparent); }
.btn-text .icon { margin-right: -0.25rem; }

/* ---- facts (assist chips) ---- */

.facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 0 3rem;
  padding: 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 2rem;
  padding: 0 0.875rem;
  border: 1px solid var(--outline-variant);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--on-surface-variant);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1px;
  line-height: 1;
}
.chip .icon { width: 1.125rem; height: 1.125rem; color: var(--primary); }

/* ---- cards (M3 elevated) ---- */

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 40rem) {
  .cards { grid-template-columns: 1fr; }
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: var(--surface-container-low);
  box-shadow: var(--shadow-1);
}
@media (prefers-color-scheme: dark) {
  .card { box-shadow: none; background: var(--surface-container); }
}

.card h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.15px;
}

.card p {
  margin: 0 0 0.75rem;
  color: var(--on-surface-variant);
  font-size: 0.875rem;
  line-height: 1.45;
  letter-spacing: 0.25px;
}

.card .btn-text { align-self: flex-start; }

/* ---- inner pages (about / privacy / 404) ---- */

.doc {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 36rem;
}

.doc h1 {
  margin: 0 0 1rem;
  font-size: 2rem;
  font-weight: 400;
  line-height: 1.25;
}

.doc p {
  margin: 0 0 1rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.doc .btn { margin-top: 1rem; align-self: flex-start; }

.doc-center { text-align: center; align-items: center; }

.error-code {
  margin: 0;
  font-size: clamp(4rem, 18vw, 6.5rem);
  font-weight: 400;
  line-height: 1;
  color: var(--error);
}

/* ---- footer ---- */

footer {
  padding: 3rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--on-surface-variant);
  font-size: 0.75rem;
  letter-spacing: 0.4px;
}

/* ---- load motion ---- */

@media (prefers-reduced-motion: no-preference) {
  .rise {
    opacity: 0;
    transform: translateY(12px);
    animation: rise 0.55s cubic-bezier(0.2, 0, 0, 1) forwards;
  }
  .rise-2 { animation-delay: 0.08s; }
  .rise-3 { animation-delay: 0.16s; }

  @keyframes rise {
    to { opacity: 1; transform: none; }
  }
}