/* TaxManagerAI website — one stylesheet, no external fonts or scripts. Dark is the app's look; light follows the system. */
:root {
  color-scheme: dark light;
  --bg: #0d0d0d;
  --bg-elevated: #141416;
  --card: #18181b;
  --border: #26262b;
  --text: #f2f2f4;
  --text-muted: #9a9aa2;
  --accent: #22d3ee;
  --accent-text: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --on-accent: #04252b;
  --glow: rgba(34, 211, 238, 0.18);
  --radius: 18px;
  --max: 1080px;
  --prose: 46rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --bg-elevated: #ffffff;
    --card: #ffffff;
    --border: #e4e4e7;
    --text: #111114;
    --text-muted: #5b5b64;
    --accent: #22d3ee;
    --accent-text: #0e7490;
    --accent-soft: rgba(14, 116, 144, 0.08);
    --on-accent: #04252b;
    --glow: rgba(34, 211, 238, 0.22);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--accent-text);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 720px) {
  .wrap {
    padding: 0 32px;
  }
}

/* Header */
.site-header {
  padding: 20px 0;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex: none;
  /* iOS-style rounded square (≈ 22 % of the edge) */
  border-radius: 10px;
  overflow: hidden;
  display: block;
}

.brand span b {
  color: var(--accent-text);
  font-weight: 650;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
}

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

/* Hero */
.hero {
  position: relative;
  padding: 48px 0 56px;
  text-align: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -80px 0 auto;
  height: 420px;
  background: radial-gradient(ellipse 60% 55% at 50% 30%, var(--glow), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 auto;
  max-width: 18ch;
  font-size: clamp(2.1rem, 7vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 750;
}

h1 .accent {
  color: var(--accent-text);
}

.lead {
  margin: 20px auto 0;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: clamp(1.0625rem, 2.6vw, 1.25rem);
}

.cta {
  margin: 32px auto 0;
  max-width: 30rem;
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  gap: 10px;
}

.badge {
  flex: 1 1 0;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 14px;
  white-space: nowrap;
  border-radius: 14px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  font-size: 1rem;
}

.badge-secondary {
  background: transparent;
  color: var(--text);
  box-shadow: inset 0 0 0 1.5px var(--border, rgba(127, 127, 127, 0.35));
}

.badge svg {
  width: 20px;
  height: 20px;
  flex: none;
}

@media (max-width: 420px) {
  .badge {
    font-size: 0.875rem;
    padding: 12px 10px;
    gap: 6px;
  }
  .badge svg {
    width: 16px;
    height: 16px;
  }
}

.cta-note {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Features */
.features {
  padding: 8px 0 64px;
}

.features h2 {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 680px) {
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
}

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.card h3 {
  margin: 14px 0 6px;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9875rem;
}

.icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-text);
}

.icon svg {
  width: 22px;
  height: 22px;
}

.trust {
  padding: 0 0 72px;
}

.trust-box {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--accent-soft), transparent);
  text-align: center;
}

.trust-box h2 {
  margin: 0 0 8px;
  font-size: 1.375rem;
  letter-spacing: -0.02em;
}

.trust-box p {
  margin: 0 auto;
  max-width: 38rem;
  color: var(--text-muted);
}

/* Legal pages */
.legal {
  padding: 24px 0 72px;
}

.legal .wrap {
  max-width: calc(var(--prose) + 64px);
}

.legal h1 {
  margin: 0;
  max-width: none;
  font-size: clamp(1.9rem, 6vw, 2.6rem);
}

.legal .meta {
  margin: 10px 0 32px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.legal h2 {
  margin: 40px 0 10px;
  font-size: 1.3rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.legal h3 {
  margin: 26px 0 8px;
  font-size: 1.075rem;
  line-height: 1.35;
}

.legal p,
.legal li {
  overflow-wrap: anywhere;
}

.legal ul {
  padding-left: 1.25rem;
}

.legal li {
  margin: 6px 0;
}

.legal address {
  font-style: normal;
}

.toc {
  margin: 0 0 8px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
}

.toc h2 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.3rem;
  columns: 1;
}

@media (min-width: 640px) {
  .toc ol {
    columns: 2;
    column-gap: 32px;
  }
}

.toc li {
  margin: 4px 0;
  break-inside: avoid;
}

.note {
  margin: 20px 0;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  background: var(--accent-soft);
}

.note p {
  margin: 0;
}

/* 404 */
.center {
  min-height: 60vh;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 48px 0;
}

.center p {
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  align-items: center;
}

.site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer a {
  color: var(--text-muted);
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a[aria-current="page"] {
  color: var(--text);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}