:root {
  color-scheme: dark;
  --bg: #05080e;
  --surface: rgba(13, 18, 32, .85);
  --border: rgba(30, 45, 74, .8);
  --ink: #e2e8f0;
  --ink-bright: #ffffff;
  --ink-soft: #94a3b8;
  --ink-body: #ccd6f6;
  --blue: #2563eb;
  --blue-mid: #3b82f6;
  --blue-light: #60a5fa;
  --pill-bg: rgba(37, 99, 235, .1);
  --pill-border: rgba(37, 99, 235, .25);
  --pill-ink: #93b4fa;
  --shadow: 0 0 24px rgba(37, 99, 235, .08), 0 8px 32px rgba(0, 0, 0, .45);
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
  --measure: 45rem;
  --gutter: 1rem;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.75 var(--font);
  position: relative;
  overflow-x: hidden;
}
/* soft blue glow and faint grid behind the top of every page */
body::before {
  content: "";
  position: absolute; inset: 0 0 auto 0; height: 900px; z-index: -1; pointer-events: none;
  background:
    radial-gradient(600px 600px at 8% 10%, rgba(37, 99, 235, .16), transparent 62%),
    radial-gradient(500px 500px at 95% 40%, rgba(37, 99, 235, .06), transparent 62%),
    linear-gradient(rgba(148, 163, 184, .035) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, rgba(148, 163, 184, .035) 1px, transparent 1px) 0 0 / 48px 48px;
  -webkit-mask-image: linear-gradient(#000 40%, transparent);
  mask-image: linear-gradient(#000 40%, transparent);
}
a { color: var(--blue-light); text-decoration: none; transition: color .2s cubic-bezier(.2, .8, .2, 1); }
a:hover { color: var(--ink-bright); }
a:focus-visible { outline: 2px solid var(--blue-mid); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 70rem; margin: 0 auto; padding: 0 var(--gutter); }
@media (min-width: 40rem) { :root { --gutter: 2rem; } }

.grad {
  background: linear-gradient(130deg, var(--blue) 0%, var(--blue-light) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* masthead */
.mast { position: sticky; top: 0; z-index: 10; background: rgba(7, 11, 20, .75); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(30, 45, 74, .5); }
.mast .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-top: 1rem; padding-bottom: 1rem; }
.mark { font: 700 1.25rem/1 var(--font); letter-spacing: -.03em; color: var(--ink-bright); }
.mark:hover { color: var(--ink-bright); }
.mark span { color: var(--blue-mid); font-weight: 300; }
.mast nav { display: flex; gap: 1.75rem; font: 500 .95rem/1 var(--font); }
.mast nav a { color: var(--ink); }
.mast nav a:hover, .mast nav a[aria-current] { color: var(--blue-mid); }

/* hero */
.hero { padding: 5rem 0 3.5rem; }
.hero h1 { font: 300 clamp(2.4rem, 6.5vw, 4.2rem)/1.08 var(--font); letter-spacing: -.035em; color: var(--ink-bright); margin: 1rem 0 1.5rem; max-width: 17ch; }
.hero p { color: var(--ink-body); font-size: 1.15rem; max-width: var(--measure); margin: 0; opacity: .85; }

/* pill tag, as on the familiar card style */
.label {
  display: inline-block; font: 600 .75rem/1 var(--font); padding: .45rem .8rem; border-radius: 999px;
  background: var(--pill-bg); border: 1px solid var(--pill-border); color: var(--pill-ink);
}
.hero .label { background: none; border: 0; padding: 0; color: var(--blue-light); letter-spacing: .04em; }
.muted { color: var(--ink-soft); font-size: .85rem; }

/* topics */
.topics { display: grid; gap: 1.25rem; padding: 1rem 0 3rem; grid-template-columns: 1fr; }
@media (min-width: 48rem) { .topics { grid-template-columns: repeat(3, 1fr); } }
.topic, .posts a {
  background: var(--surface); border: 1px solid var(--border); border-radius: 1rem; box-shadow: var(--shadow);
  transition: transform .35s cubic-bezier(.2, .8, .2, 1), border-color .35s cubic-bezier(.2, .8, .2, 1);
}
.topic { padding: 1.75rem; }
.topic h2 { font: 400 1.25rem/1.3 var(--font); color: var(--ink-bright); letter-spacing: -.01em; margin: 1rem 0 .5rem; }
.topic p { margin: 0; font-size: .95rem; color: var(--ink-soft); }

/* post list */
.section-head { display: flex; justify-content: space-between; align-items: baseline; padding-top: 1rem; }
.section-head h2 { font: 300 1.9rem/1.2 var(--font); letter-spacing: -.03em; color: var(--ink-bright); margin: 0; }
.posts { list-style: none; margin: 1.25rem 0 5rem; padding: 0; display: grid; gap: 1.25rem; }
.posts a { display: grid; gap: .6rem; padding: 1.75rem; color: var(--ink); }
.posts a:hover { transform: translateY(-3px); border-color: rgba(37, 99, 235, .45); color: var(--ink); }
.posts a:active { transform: translateY(-1px); }
.posts .row { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.posts h3 { font: 400 1.4rem/1.3 var(--font); color: var(--ink-bright); letter-spacing: -.015em; margin: .25rem 0 0; }
.posts p { margin: 0; color: var(--ink-soft); font-size: .95rem; }
.posts .more { color: var(--blue-mid); font-weight: 600; font-size: .95rem; margin-top: .5rem; }

/* article */
.article { max-width: var(--measure); margin: 0 auto; padding: 4rem 0 5rem; }
.article .back { font-size: .85rem; font-weight: 500; color: var(--ink); }
.article .back:hover { color: var(--blue-mid); }
.article h1 { font: 300 clamp(2rem, 5vw, 3.1rem)/1.12 var(--font); letter-spacing: -.035em; color: var(--ink-bright); margin: 1.25rem 0 1.25rem; }
.article .dek { font-size: 1.2rem; color: var(--ink-body); opacity: .85; margin: 0 0 2.5rem; }
.article p, .article li { color: var(--ink-body); }
.article h2 { font: 400 1.4rem/1.3 var(--font); letter-spacing: -.01em; color: var(--ink-bright); margin: 2.75rem 0 .5rem; }
.article blockquote { margin: 2.25rem 0; padding: 1.25rem 1.5rem; border-radius: 1rem; background: linear-gradient(135deg, rgba(37, 99, 235, .1), rgba(13, 18, 32, .6)); border: 1px solid rgba(37, 99, 235, .2); color: var(--ink-bright); font-size: 1.15rem; }
.article ul { padding-left: 1.2rem; }
.article li { margin: .4rem 0; }
.article li::marker { color: var(--blue-mid); }
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-top: 2rem; }

/* footer */
.foot { border-top: 1px solid rgba(30, 45, 74, .6); padding: 2rem 0 3rem; color: var(--ink-soft); font-size: .9rem; }
.foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.foot a { color: var(--ink-body); }
.foot a:hover { color: var(--blue-mid); }