:root {
  --bg: #ffffff;
  --bg-soft: #f6f6f4;
  --fg: #16161a;
  --muted: #5f6169;
  --line: #e3e3df;
  --accent: #1d4ed8;
  --accent-soft: #eef2ff;
  --radius: 10px;
  --maxw: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101014;
    --bg-soft: #17171d;
    --fg: #ececf1;
    --muted: #9a9caa;
    --line: #2a2a33;
    --accent: #8ab4ff;
    --accent-soft: #1a1f30;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

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

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; font-weight: 650; letter-spacing: -.015em; }
h1 { font-size: 2.45rem; }
h2 { font-size: 1.75rem; margin-top: 2em; }
h3 { font-size: 1.2rem; margin-top: 1.6em; }
p { margin: 0 0 1.1em; }

hr { border: 0; border-top: 1px solid var(--line); margin: 3rem 0; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 720px; }

/* ---------- header ---------- */

.site-head {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 20;
}

.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 650;
  letter-spacing: -.02em;
  font-size: 1.05rem;
}
.brand:hover { text-decoration: none; }
.brand img { width: 26px; height: 26px; border-radius: 6px; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { color: var(--muted); font-size: .95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--fg); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--fg);
  font-size: .9rem;
  padding: 7px 12px;
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 18px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 0; font-size: 1rem; }
  .nav-toggle { display: block; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 8px;
  background: var(--fg);
  color: var(--bg);
  font-size: .95rem;
  font-weight: 550;
  border: 1px solid var(--fg);
}
.btn:hover { text-decoration: none; opacity: .88; }

.btn.ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--line);
}
.btn.ghost:hover { border-color: var(--fg); opacity: 1; }

/* ---------- layout blocks ---------- */

.hero { padding: 84px 0 60px; }
.hero h1 { font-size: clamp(2.1rem, 5.2vw, 3.3rem); max-width: 15ch; }
.hero .lede { font-size: 1.17rem; color: var(--muted); max-width: 54ch; margin-bottom: 1.8em; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.section { padding: 56px 0; border-top: 1px solid var(--line); }
.section > .wrap > h2:first-child { margin-top: 0; }

.eyebrow {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: .9em;
}

.grid { display: grid; gap: 22px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 860px) {
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid.cols-2, .grid.cols-3 { grid-template-columns: 1fr; }
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--bg-soft);
}
.card h3 { margin-top: 0; font-size: 1.05rem; }
.card p { color: var(--muted); font-size: .95rem; margin-bottom: 0; }

a.card { color: inherit; display: block; }
a.card:hover { text-decoration: none; border-color: var(--muted); }
a.card h3 { color: var(--fg); }

.meta { color: var(--muted); font-size: .87rem; }

.stat { font-size: 2rem; font-weight: 650; letter-spacing: -.03em; }

/* ---------- lists ---------- */

.list { list-style: none; padding: 0; margin: 0; }
.list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
}
.list li:first-child { border-top: 1px solid var(--line); }
.list .t { font-weight: 550; }

.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1.2em; }
.prose li { margin-bottom: .45em; }

blockquote {
  margin: 1.8em 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--line);
  color: var(--muted);
  font-style: italic;
}

code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
}

table { width: 100%; border-collapse: collapse; font-size: .94rem; margin: 1.4em 0; }
th, td { text-align: left; padding: 11px 10px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; }

.table-scroll { overflow-x: auto; }

/* ---------- forms ---------- */

label { display: block; font-size: .9rem; font-weight: 550; margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  font-size: .95rem;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 18px;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { min-height: 140px; resize: vertical; }

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--line);
  margin-top: 72px;
  padding: 48px 0 60px;
  background: var(--bg-soft);
  font-size: .92rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 34px;
}
@media (max-width: 720px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
.site-foot h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin-bottom: 1em; }
.site-foot a { color: var(--fg); display: block; padding: 5px 0; }
.site-foot p { color: var(--muted); }
.colophon {
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  color: var(--muted);
  font-size: .87rem;
}
.colophon a { display: inline; color: var(--muted); }