/* Perth AI Safety — Material-flavoured essentialist stylesheet (design.md is binding). */

@font-face {
  font-family: "Roboto";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/roboto-latin.woff2") format("woff2");
}

:root {
  --primary: #BD0000;
  --secondary: #020598;
  --on-primary: #ffffff;
  --surface: #ffffff;
  --surface-dim: #f6f6f7;
  --ink: #1c1b1f;
  --ink-soft: #444349;
  --outline: #e3e2e6;
  --radius: 12px;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.10), 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-2: 0 2px 6px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--surface);
}

/* --- accessibility --- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--secondary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 0; }

a { color: var(--secondary); }
a:focus-visible,
.faq-question:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* --- app bar --- */
.appbar {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--shadow-1);
  position: sticky;
  top: 0;
  z-index: 5;
}
.appbar-inner {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.appbar a { color: var(--on-primary); text-decoration: none; }
.appbar a:hover { text-decoration: underline; }
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: 0.2px; }
.appbar-links { display: flex; gap: 1.25rem; font-weight: 500; }

/* --- layout --- */
.section {
  max-width: 60rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem;
}
.section.narrow { max-width: 46rem; }

.hero { background: var(--surface-dim); border-bottom: 1px solid var(--outline); }
#hero-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; margin: 0 0 0.25rem; }
.hero-hook {
  color: var(--primary);
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  font-weight: 500;
  margin: 0 0 1rem;
}
.hero-lede { max-width: 46rem; color: var(--ink-soft); }

h2 { font-size: 1.6rem; font-weight: 700; margin: 0 0 0.75rem; }
h3 { font-size: 1.2rem; font-weight: 500; margin: 2rem 0 0.5rem; }
.minimal-case { border-left: 4px solid var(--primary); padding-left: 1rem; }

/* --- cards --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 1.25rem;
}
.card h4, .card h2 { margin: 0 0 0.5rem; color: var(--secondary); }
.event-teaser { margin-bottom: 1rem; box-shadow: var(--shadow-2); }

/* --- FAQ --- */
.faq-hint { color: var(--ink-soft); }
.faq-list { list-style: none; margin: 1rem 0 0; padding: 0; }
.faq-item { border-bottom: 1px solid var(--outline); }
.faq-question {
  display: block;
  padding: 0.9rem 0.25rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink);
}
.faq-question::before { content: "+ "; color: var(--primary); font-weight: 700; }
.faq-question[aria-expanded="true"]::before { content: "– "; }
.faq-question:hover { color: var(--primary); }
.faq-answer { padding: 0 0.25rem 1rem 1.4rem; color: var(--ink-soft); }
.faq-answer p { margin: 0; }

/* --- misc --- */
.discord-note { color: var(--ink-soft); font-style: italic; }
.stub-note { color: var(--ink-soft); margin-top: 1.5rem; }
.timeline { padding-left: 1.25rem; }
.timeline li { margin-bottom: 0.75rem; }
.sources { padding-left: 1.25rem; }
q { quotes: "\201C" "\201D"; font-style: italic; }

/* --- footer --- */
.footer { background: var(--surface-dim); border-top: 1px solid var(--outline); margin-top: 2rem; }
.footer-inner {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer a { color: var(--secondary); }

@media (max-width: 480px) {
  .section { padding: 1.75rem 1rem; }
  .footer-inner { flex-direction: column; }
}