:root {
  --bg: #08111f;
  --bg-2: #0d1b2e;
  --panel: #111f33;
  --panel-2: #162840;
  --text: #f4f7fb;
  --muted: #aebbd0;
  --line: rgba(255,255,255,.12);
  --accent: #ff7a1a;
  --accent-2: #38bdf8;
  --shadow: 0 24px 80px rgba(0,0,0,.35);
  --radius: 24px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(56,189,248,.18), transparent 34rem),
    radial-gradient(circle at top right, rgba(255,122,26,.15), transparent 34rem),
    var(--bg);
}

a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  background: rgba(8,17,31,.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  font-weight: 800;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: .8rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #08111f;
  font-weight: 900;
}

nav {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-size: .95rem;
}

nav a:hover { color: var(--text); }

main { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr);
  gap: 2rem;
  align-items: center;
  min-height: 72vh;
  padding: 5rem 0;
}

.grid-bg {
  position: relative;
}

.grid-bg::before {
  content: "";
  position: absolute;
  inset: 2rem -2rem;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 0%, transparent 70%);
  pointer-events: none;
  opacity: .6;
}

.hero-copy, .number-card, .section, .page { position: relative; z-index: 1; }

.eyebrow, .tag, .label {
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .78rem;
  font-weight: 800;
}

h1, h2, h3 { line-height: 1.04; margin: 0; }

h1 {
  font-size: clamp(3rem, 9vw, 7.5rem);
  letter-spacing: -.08em;
  max-width: 940px;
}

h2 {
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -.05em;
}

h3 {
  font-size: 1.35rem;
  letter-spacing: -.02em;
}

.lede {
  color: var(--muted);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  max-width: 760px;
}

.hero-copy p { max-width: 760px; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 3rem;
  padding: .8rem 1.15rem;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid var(--line);
}

.button.primary {
  background: var(--accent);
  color: #111;
  border-color: transparent;
}

.button.secondary {
  background: rgba(255,255,255,.06);
  color: var(--text);
}

.number-card, .feature-card, .topic-card, .brief {
  background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.035));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.number-card {
  padding: 2rem;
}

.big-number {
  font-size: clamp(5rem, 12vw, 8rem);
  font-weight: 900;
  letter-spacing: -.08em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  color: transparent;
}

.number-card p {
  color: var(--muted);
  font-size: 1.05rem;
}

.number-card a { color: var(--text); font-weight: 800; }

.section { padding: 4rem 0; }

.section-head {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

.section-head p { color: var(--muted); font-size: 1.1rem; }

.feature-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.feature-card p { color: var(--muted); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.topic-card {
  display: block;
  padding: 1.35rem;
  min-height: 240px;
  transition: transform .2s ease, border-color .2s ease;
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56,189,248,.55);
}

.icon {
  display: block;
  font-size: 2rem;
  margin-bottom: 1.25rem;
}

.topic-card p { color: var(--muted); }

.split {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 2rem;
  align-items: start;
}

.tool-list {
  display: grid;
  gap: .7rem;
}

.tool-list a, .article-list a {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,.045);
}

.tool-list a:hover, .article-list a:hover { border-color: rgba(255,122,26,.65); }

.page {
  padding: 4rem 0 6rem;
}

.page.narrow { max-width: 820px; }

.page h1 { font-size: clamp(2.7rem, 7vw, 5.5rem); }

.brief {
  padding: clamp(1.25rem, 4vw, 2rem);
  color: var(--muted);
  margin-top: 2rem;
}

.brief h2, .brief h3 { color: var(--text); margin-top: 1.5rem; }

.article-section {
  margin-top: 3rem;
}

.article-list {
  display: grid;
  gap: .8rem;
  margin-top: 1rem;
}

footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .hero, .split { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { align-items: flex-start; flex-direction: column; }
  nav { gap: .65rem; font-size: .85rem; }
}

@media (max-width: 620px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .card-grid { grid-template-columns: 1fr; }
  .topic-card { min-height: auto; }
}