:root {
  color-scheme: light dark;
  --bg: #f5f5f8;
  --card: #ffffff;
  --fg: #1b1b22;
  --muted: #6d6d7a;
  --line: #e3e3ea;
  --accent: #4b3f9e;
  --accent-soft: #eeecf9;
  --radius: 4px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14141a;
    --card: #1c1c24;
    --fg: #e9e9f0;
    --muted: #9797a8;
    --line: #2b2b36;
    --accent: #a79cf0;
    --accent-soft: #232034;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

.shell { width: min(48rem, 100% - 3rem); margin-inline: auto; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }

/* topbar */
.topbar { background: var(--card); border-bottom: 1px solid var(--line); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .85rem; }
.logo { display: inline-flex; align-items: center; gap: .5rem; color: var(--fg); font-weight: 650; font-size: .95rem; letter-spacing: -.01em; text-decoration: none; }
.logo:hover { text-decoration: none; color: var(--accent); }
.logo-dot { width: .8rem; height: .8rem; border-radius: 3px; background: var(--accent); display: inline-block; }
.topnav { display: flex; gap: 1.1rem; font-size: .86rem; }
.topnav a { color: var(--muted); }
.topnav a:hover { color: var(--fg); }

main { padding-block: 2.8rem 3.4rem; }

.kicker { margin: 0 0 .35rem; font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--accent); font-weight: 650; }
h1 { margin: 0 0 .7rem; font-size: clamp(1.65rem, 1.2rem + 1.7vw, 2.1rem); line-height: 1.22; font-weight: 700; letter-spacing: -.025em; }
h2 { margin: 2rem 0 .55rem; font-size: 1rem; font-weight: 680; letter-spacing: -.01em; }
h2:first-of-type { margin-top: 1.8rem; }
.standfirst { margin: 0 0 2.2rem; font-size: 1.04rem; color: var(--muted); }

p { margin: 0 0 1rem; }

/* topic cards with a left accent bar */
.topics { display: grid; gap: .7rem; margin-bottom: 2.4rem; }
.topic {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-left: 3px solid var(--accent); border-radius: var(--radius);
  padding: .95rem 1.15rem; color: var(--fg); text-decoration: none;
  transition: background .14s ease;
}
.topic:hover { background: var(--accent-soft); text-decoration: none; }
.topic-kicker { display: block; font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 650; margin-bottom: .18rem; }
.topic-title { display: block; font-weight: 650; font-size: 1rem; }
.topic-desc { display: block; margin-top: .3rem; color: var(--muted); font-size: .9rem; line-height: 1.6; }

.note { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.35rem; }
.note h2 { margin-top: 0; }

/* footer */
.basefoot { border-top: 1px solid var(--line); background: var(--card); }
.basefoot-inner { display: flex; flex-wrap: wrap; gap: .2rem 1rem; justify-content: space-between; padding-block: 1.2rem; font-size: .8rem; color: var(--muted); }
.basefoot-inner p { margin: 0; }

@media (max-width: 34rem) {
  .topbar-inner { flex-direction: column; align-items: flex-start; gap: .4rem; }
  main { padding-block: 2.2rem 2.6rem; }
}