/* Taxsy — static site styles. No frameworks. */
:root {
  --indigo: #2E2ED9;
  --teal:   #0FB5C9;
  --green:  #2FCB5F;
  --ink:    #0D0F26;
  --text:   #1c1c25;
  --muted:  #5d6070;
  --line:   #e4e6ee;
  --bg:     #ffffff;
  --bg-alt: #f5f6fa;
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--indigo); }

.wrap { max-width: 62rem; margin: 0 auto; padding: 0 1.5rem; }
.narrow { max-width: 46rem; }

/* ---------- Header ---------- */
header.site {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex; align-items: center; gap: .75rem;
  height: 62px;
}
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; text-decoration: none; color: var(--text); }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
header.site nav { margin-left: auto; display: flex; gap: 1.25rem; }
header.site nav a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; }
header.site nav a:hover { color: var(--text); }

/* ---------- Hero ---------- */
.hero {
  background: var(--ink);
  background-image:
    radial-gradient(50rem 30rem at 15% -10%, rgba(46,46,217,.75), transparent 60%),
    radial-gradient(45rem 28rem at 90% 30%, rgba(15,181,201,.5), transparent 60%);
  color: #fff;
  text-align: center;
  padding: 5rem 0 5.5rem;
}
.hero img.mark { width: 104px; height: 104px; border-radius: 24px; margin-bottom: 1.5rem; }
.hero h1 { font-size: clamp(2.1rem, 6vw, 3.2rem); margin: 0 0 .6rem; letter-spacing: -.02em; }
.hero p.lede { font-size: 1.15rem; color: rgba(255,255,255,.72); margin: 0 auto 2rem; max-width: 34rem; }

.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--indigo), var(--teal));
  color: #fff; text-decoration: none; font-weight: 600;
  padding: .85rem 2rem; border-radius: 999px;
  box-shadow: 0 10px 26px rgba(46,46,217,.35);
}
.btn.secondary { background: rgba(255,255,255,.12); box-shadow: none; }
.hero .note { display: block; margin-top: 1rem; font-size: .85rem; color: rgba(255,255,255,.5); }

/* ---------- Sections ---------- */
section { padding: 4rem 0; }
section.alt { background: var(--bg-alt); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2rem); letter-spacing: -.015em; margin: 0 0 .6rem; }
.section-lede { color: var(--muted); margin: 0 0 2.25rem; max-width: 38rem; }

.features { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
.feature {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.4rem;
}
section.alt .feature { background: #fff; }
.feature .ico {
  width: 38px; height: 38px; border-radius: 10px; margin-bottom: .9rem;
  background: linear-gradient(135deg, var(--indigo), var(--teal));
  display: grid; place-items: center; color: #fff;
}
.feature .ico svg { width: 19px; height: 19px; fill: currentColor; }
.feature h3 { margin: 0 0 .35rem; font-size: 1.02rem; }
.feature p { margin: 0; color: var(--muted); font-size: .93rem; }

/* ---------- Steps ---------- */
.steps { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); counter-reset: step; }
.step { padding: 1.4rem; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 999px; margin-bottom: .8rem;
  background: var(--ink); color: #fff; font-weight: 700; font-size: .9rem;
}
.step h3 { margin: 0 0 .3rem; font-size: 1rem; }
.step p { margin: 0; color: var(--muted); font-size: .93rem; }

/* ---------- Prose (privacy / support) ---------- */
.prose h1 { font-size: clamp(1.8rem, 4.5vw, 2.4rem); margin: 0 0 .35rem; letter-spacing: -.02em; }
.prose .updated { color: var(--muted); font-size: .9rem; margin: 0 0 2.5rem; }
.prose h2 { margin: 2.4rem 0 .6rem; font-size: 1.2rem; }
.prose p, .prose li { color: #33364a; }
.prose ul { padding-left: 1.15rem; }
.prose li { margin-bottom: .4rem; }

details.faq {
  border: 1px solid var(--line); border-radius: 14px;
  padding: .95rem 1.15rem; margin-bottom: .7rem; background: #fff;
}
details.faq[open] { border-color: #c9cddd; }
details.faq summary {
  cursor: pointer; font-weight: 600; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; font-size: 1.3rem; line-height: 1; }
details.faq[open] summary::after { content: "–"; }
details.faq p { margin: .8rem 0 .2rem; color: var(--muted); }
details.faq p:last-child { margin-bottom: 0; }

.callout {
  border: 1px solid var(--line); border-left: 3px solid var(--indigo);
  background: var(--bg-alt); border-radius: 10px;
  padding: 1rem 1.15rem; margin: 1.5rem 0;
}
.callout p { margin: 0; }

/* ---------- Footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3rem; color: var(--muted); font-size: .9rem;
}
footer.site .row { display: flex; flex-wrap: wrap; gap: 1.25rem; align-items: center; }
footer.site nav { margin-left: auto; display: flex; gap: 1.25rem; flex-wrap: wrap; }
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--text); }
footer.site .legal { margin-top: 1.25rem; font-size: .82rem; }

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e9eaf2; --muted: #a0a3b8; --line: #2a2d42;
    --bg: #0f1120; --bg-alt: #161936;
  }
  body { background: var(--bg); }
  header.site { background: rgba(15,17,32,.85); }
  .feature, .step, details.faq, section.alt .feature { background: #171a30; }
  .prose p, .prose li { color: #c8cbdd; }
  a { color: #8fa2ff; }
}