:root {
  color-scheme: light dark;
  --canvas: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.86);
  --surface-strong: #ffffff;
  --ink: #18202a;
  --muted: #5d6876;
  --line: rgba(24, 32, 42, 0.13);
  --blue: #2864dc;
  --teal: #0f8f87;
  --glow: rgba(40, 100, 220, 0.16);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--canvas); }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 4%, var(--glow), transparent 28rem),
    radial-gradient(circle at 8% 34%, rgba(15, 143, 135, 0.12), transparent 25rem),
    var(--canvas);
  line-height: 1.65;
}
a { color: var(--blue); text-underline-offset: 0.2em; }
a:focus-visible { outline: 3px solid var(--teal); outline-offset: 4px; border-radius: 0.25rem; }
.shell { width: min(73rem, calc(100% - 2rem)); margin: 0 auto; padding: 1.1rem 0 4rem; }
.site-header,
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.site-header { padding: 0.7rem 0 2.7rem; }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; color: var(--ink); font-weight: 780; text-decoration: none; }
.brand-mark {
  display: grid;
  width: 2.4rem;
  height: 2.4rem;
  place-items: center;
  border-radius: 0.82rem;
  color: #fff;
  background: linear-gradient(145deg, var(--blue), var(--teal));
  box-shadow: 0 0.6rem 1.5rem var(--glow);
}
.site-nav { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.site-nav a { padding: 0.45rem 0.72rem; border-radius: 999px; color: var(--muted); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--surface); }
.hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr); gap: clamp(2rem, 7vw, 6rem); align-items: center; min-height: 31rem; padding: 2.5rem 0 5rem; }
.eyebrow { margin: 0 0 0.75rem; color: var(--teal); font-size: 0.78rem; font-weight: 780; letter-spacing: 0.13em; text-transform: uppercase; }
h1,
h2 { line-height: 1.08; letter-spacing: -0.04em; }
h1 { max-width: 14ch; margin: 0; font-size: clamp(3rem, 8vw, 6.25rem); }
h2 { margin-top: 0; font-size: clamp(1.45rem, 3vw, 2rem); }
.lede { max-width: 46rem; color: var(--muted); font-size: clamp(1.08rem, 2.1vw, 1.38rem); }
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.35rem; }
.button { display: inline-flex; padding: 0.72rem 1.05rem; border: 1px solid var(--line); border-radius: 0.9rem; color: var(--ink); font-weight: 720; text-decoration: none; background: var(--surface); }
.button.primary { border-color: transparent; color: #fff; background: var(--blue); }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.72rem; padding: 1.1rem; border: 1px solid var(--line); border-radius: 1.8rem; background: var(--surface); box-shadow: 0 1.6rem 4rem rgba(36, 61, 90, 0.12); transform: rotate(1.5deg); }
.tool-tile { display: grid; min-height: 5.4rem; place-items: center; padding: 0.6rem; border-radius: 1.05rem; color: var(--muted); font-size: 0.76rem; font-weight: 720; text-align: center; background: var(--surface-strong); }
.tool-tile strong { display: block; color: var(--blue); font-size: 1.45rem; }
.content { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 1rem; }
.card { grid-column: span 6; padding: clamp(1.35rem, 3vw, 2rem); border: 1px solid var(--line); border-radius: 1.35rem; background: var(--surface); }
.card.wide { grid-column: 1 / -1; }
.card p:last-child,
.card ul:last-child,
.card ol:last-child { margin-bottom: 0; }
.card li + li { margin-top: 0.55rem; }
.page-heading { padding: 2.8rem 0 3.5rem; }
.notice { margin: 1rem 0 0; padding: 1rem 1.15rem; border-left: 0.3rem solid var(--teal); border-radius: 0.55rem; color: var(--muted); background: var(--surface); }
.site-footer { margin-top: 3rem; padding: 1.2rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.88rem; }
.site-footer p { margin: 0; }
@media (max-width: 760px) {
  .site-header,
  .site-footer { align-items: flex-start; flex-direction: column; }
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 1rem; }
  .tool-grid { max-width: 27rem; transform: none; }
  .card { grid-column: 1 / -1; }
}
@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #12171d;
    --surface: rgba(32, 40, 49, 0.86);
    --surface-strong: #29323d;
    --ink: #f1f5f8;
    --muted: #b4bec8;
    --line: rgba(241, 245, 248, 0.14);
    --blue: #85adff;
    --teal: #6fd8d0;
    --glow: rgba(67, 122, 235, 0.18);
  }
  .button.primary { color: #0f1720; }
}