/* Plain-language app pages (dist/apps/<slug>/). Same palette as the book. */
:root {
  --ink-950: #0a0d18;
  --ink-925: #0e1222;
  --ink-900: #141a2e;
  --ink-850: #1a2138;
  --ink-700: #2a3254;
  --fg: #e4e7f0;
  --fg-strong: #ffffff;
  --fg-muted: #97a0bf;
  --ember: #e34a21;
  --ember-soft: #ffac7a;
  --success: #34d399;
  --line: rgba(255, 255, 255, 0.09);
  --display: 'Newsreader', ui-serif, Georgia, serif;
  --sans: 'Geist', ui-sans-serif, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%), var(--ink-950);
  color: var(--fg);
  font: 16px/1.6 var(--sans);
}
a { color: inherit; }
img { max-width: 100%; display: block; }

/* header */
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 20px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: rgba(10, 13, 24, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; text-decoration: none; color: var(--fg-strong); }
.brand img { width: 34px; height: auto; }
.links { margin-left: auto; display: flex; gap: 22px; }
.links a, .menu nav a { color: var(--fg-muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.links a:hover, .menu nav a:hover { color: var(--fg-strong); }
.menu { display: none; margin-left: auto; position: relative; }
.menu summary { list-style: none; cursor: pointer; display: grid; gap: 4px; padding: 10px; border: 1px solid var(--line); border-radius: 8px; }
.menu summary::-webkit-details-marker { display: none; }
.menu summary span { display: block; width: 18px; height: 2px; background: var(--fg); border-radius: 1px; }
.menu nav { position: absolute; right: 0; top: calc(100% + 8px); display: grid; min-width: 200px; padding: 8px; background: var(--ink-925); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 18px 40px -12px #000; }
.menu nav a { padding: 10px 12px; font-size: 15px; }
@media (max-width: 1060px) {
  .links { display: none; }
  .menu { display: block; }
}

main { max-width: 1120px; margin: 0 auto; padding: 24px clamp(16px, 4vw, 40px) 64px; }
.back { display: inline-block; margin: 8px 0 28px; color: var(--fg-muted); text-decoration: none; font-size: 14px; }
.back:hover { color: var(--fg-strong); }

h1, h2 { font-family: var(--display); font-weight: 500; color: var(--fg-strong); letter-spacing: -0.01em; }
h2 { font-size: clamp(28px, 3.4vw, 38px); margin: 0 0 22px; }
h3 { margin: 0 0 6px; font-size: 17px; color: var(--fg-strong); }
section { margin-top: 72px; }

/* hero */
.hero { margin-top: 0; display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.eyebrow { margin: 0 0 12px; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; color: var(--ember-soft); text-transform: uppercase; letter-spacing: 0.12em; font-size: 12px; font-weight: 600; }
.status { padding: 3px 10px; border-radius: 999px; background: rgba(217, 154, 44, 0.16); color: #eab357; letter-spacing: 0.06em; }
.status.is-live { background: rgba(52, 211, 153, 0.15); color: var(--success); }
h1 { font-size: clamp(40px, 5.6vw, 64px); line-height: 1.02; margin: 0 0 14px; }
.tagline { font-family: var(--display); font-style: italic; font-size: clamp(20px, 2.2vw, 24px); color: var(--fg); margin: 0 0 18px; }
.lead { font-size: 18px; color: var(--fg-muted); margin: 0; max-width: 56ch; }
.shot { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 30px 60px -24px #000, 0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent); background: var(--ink-900); }
.shot img { width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: cover; object-position: top left; }

.ctas { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 10px 18px; border-radius: 10px; border: 1px solid var(--line); color: var(--fg-strong); text-decoration: none; font-weight: 600; font-size: 15px; background: rgba(255, 255, 255, 0.03); }
.btn:hover { background: rgba(255, 255, 255, 0.07); }
.btn.primary { background: var(--ember); border-color: var(--ember); }
.btn.primary:hover { background: #f56a2d; }

/* who */
.who ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.who li { padding: 10px 16px; border-radius: 999px; background: var(--ink-900); border: 1px solid var(--line); font-weight: 500; }

/* how */
.how ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; counter-reset: s; }
.how li { display: flex; gap: 14px; padding: 22px; border-radius: 14px; background: var(--ink-900); border: 1px solid var(--line); }
.how .n { flex: none; width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 700; }
.how p { margin: 0; color: var(--fg-muted); }

/* features */
.features .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.features article { padding: 24px; border-radius: 14px; background: var(--ink-900); border: 1px solid var(--line); }
.features .ic { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 14px; color: var(--accent); background: color-mix(in srgb, var(--accent) 16%, transparent); }
.features p { margin: 0; color: var(--fg-muted); }
@media (max-width: 900px) { .features .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; }
  .shot { order: -1; }
}
@media (max-width: 560px) { .features .grid { grid-template-columns: 1fr; } }

/* closing */
.cta { padding: clamp(28px, 4vw, 44px); border-radius: 18px; background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 22%, var(--ink-900)), var(--ink-900)); border: 1px solid var(--line); }
.cta p { margin: 0; color: var(--fg); max-width: 60ch; }

.pager { margin-top: 48px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pager a { padding: 18px 20px; border-radius: 12px; border: 1px solid var(--line); text-decoration: none; color: var(--fg-strong); font-weight: 600; }
.pager a:last-child { text-align: right; }
.pager a span { display: block; color: var(--fg-muted); font-size: 13px; font-weight: 500; margin-bottom: 2px; }
.pager a:hover { background: var(--ink-900); }

.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 24px clamp(16px, 4vw, 40px); border-top: 1px solid var(--line); color: var(--fg-muted); font-size: 14px; }
.foot a { color: var(--fg-muted); }