/* ChitChat — Xylvin Technologies Pvt Ltd
   Shared stylesheet for chitchat.xylvin.com
   Brand colours mirror lib/theme/app_theme.dart (primary #006D2F). */

:root {
  --green-900: #002109;
  --green-700: #005322;
  --green-600: #006D2F;
  --green-500: #25D366;
  --green-100: #E6F5EC;

  --paper: #FFFFFF;
  --ground: #F7F9F8;
  --ink: #101613;
  --ink-2: #4A5652;
  --ink-3: #77837E;
  --rule: #E2E8E5;
  --rule-2: #CBD5D0;

  --warn: #9A5700;
  --warn-soft: #FBF2E3;

  --measure: 68ch;
  --radius: 14px;

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131A17;
    --ground: #0C110F;
    --ink: #E9EFEC;
    --ink-2: #A3AFAA;
    --ink-3: #7E8A85;
    --rule: #253029;
    --rule-2: #33413A;
    --green-600: #3DE273;
    --green-700: #66FF8E;
    --green-100: #14291D;
    --warn: #E0A458;
    --warn-soft: #2A2216;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.wrap-narrow {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a { color: var(--green-600); text-underline-offset: 2px; }
a:hover { color: var(--green-700); }
a:focus-visible {
  outline: 2px solid var(--green-600);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ── Header ───────────────────────────────────────────────────────────── */

.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
/* The app icon is its own artwork — a green speech bubble on a black rounded
   square — so it needs no gradient backdrop. The radius only trims the square
   corners so it sits well against either theme. */
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  flex: 0 0 auto;
  display: block;
  object-fit: cover;
}
.site-nav { display: flex; gap: 1.35rem; align-items: center; }
.site-nav a {
  font-size: 0.9375rem;
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 500;
}
.site-nav a:hover { color: var(--green-600); }
@media (max-width: 34rem) {
  .site-nav a.hide-sm { display: none; }
}

/* ── Hero ─────────────────────────────────────────────────────────────── */

.hero {
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 4.5rem 0 4rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}
@media (min-width: 52rem) {
  .hero-grid { grid-template-columns: 1.15fr 0.85fr; }
}
.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-600);
  background: var(--green-100);
  padding: 0.3rem 0.7rem;
  border-radius: 100px;
  margin-bottom: 1.1rem;
}
h1 {
  font-size: clamp(2.1rem, 6vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 0 0 1rem;
  text-wrap: balance;
}
.lede {
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 46ch;
  margin: 0 0 1.75rem;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--green-600); color: #fff; }
.btn-primary:hover { background: var(--green-700); color: #fff; }
@media (prefers-color-scheme: dark) {
  .btn-primary { color: var(--green-900); }
  .btn-primary:hover { color: var(--green-900); }
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-2);
}
.btn-ghost:hover { border-color: var(--green-600); color: var(--green-600); }
.btn[aria-disabled="true"] {
  opacity: 0.55;
  pointer-events: none;
}
.cta-note { font-size: 0.8125rem; color: var(--ink-3); margin: 0.9rem 0 0; }

/* Phone mock */
.phone {
  margin: 0 auto;
  width: 260px;
  max-width: 100%;
  border: 10px solid var(--ink);
  border-radius: 34px;
  background: var(--ground);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}
.phone-bar {
  background: var(--green-600);
  color: #fff;
  padding: 0.85rem 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.8125rem;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  .phone-bar { color: var(--green-900); }
}
.phone-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
  flex: 0 0 auto;
}
.phone-body { padding: 0.9rem 0.75rem; display: grid; gap: 0.5rem; }
.bubble {
  max-width: 82%;
  padding: 0.5rem 0.7rem;
  border-radius: 12px;
  font-size: 0.8125rem;
  line-height: 1.4;
  background: var(--paper);
  border: 1px solid var(--rule);
}
.bubble.out {
  margin-left: auto;
  background: var(--green-100);
  border-color: transparent;
}
.bubble .meta {
  display: block;
  font-size: 0.625rem;
  color: var(--ink-3);
  margin-top: 0.2rem;
}

/* ── Sections ─────────────────────────────────────────────────────────── */

section.band { padding: 4rem 0; }
section.band.alt { background: var(--paper); border-block: 1px solid var(--rule); }

.section-head { max-width: 44ch; margin-bottom: 2.25rem; }
h2 {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.022em;
  font-weight: 700;
  margin: 0 0 0.6rem;
  text-wrap: balance;
}
.section-head p { color: var(--ink-2); margin: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem;
}
section.band.alt .card { background: var(--ground); }
.card h3 {
  font-size: 1.0625rem;
  font-weight: 650;
  margin: 0.85rem 0 0.4rem;
  letter-spacing: -0.01em;
}
.card p { margin: 0; color: var(--ink-2); font-size: 0.9375rem; }
.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--green-100);
  color: var(--green-600);
  display: grid;
  place-items: center;
  font-size: 19px;
}
.tag-soon {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--warn);
  background: var(--warn-soft);
  padding: 0.15rem 0.45rem;
  border-radius: 5px;
  margin-left: 0.4rem;
  vertical-align: 2px;
}

/* ── Legal pages ──────────────────────────────────────────────────────── */

.doc-header {
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 3rem 0 2.25rem;
}
.doc-header h1 { font-size: clamp(1.85rem, 5vw, 2.5rem); margin-bottom: 0.6rem; }
.doc-meta {
  font-size: 0.875rem;
  color: var(--ink-3);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}

.doc { padding: 2.5rem 0 4rem; }
.doc h2 {
  font-size: 1.375rem;
  margin: 2.5rem 0 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}
.doc h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 0; }
.doc h3 {
  font-size: 1.0625rem;
  font-weight: 650;
  margin: 1.6rem 0 0.5rem;
  letter-spacing: -0.008em;
}
.doc p, .doc li { max-width: var(--measure); }
.doc p { margin: 0 0 1rem; }
.doc ul, .doc ol { margin: 0 0 1rem; padding-left: 1.3rem; }
.doc li { margin-bottom: 0.45rem; }
.doc li::marker { color: var(--ink-3); }

.toc {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin-bottom: 2.5rem;
}
.toc h2 {
  font-size: 0.75rem !important;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin: 0 0 0.7rem !important;
  padding: 0 !important;
  border: 0 !important;
}
.toc ol { margin: 0; padding-left: 1.2rem; columns: 2; column-gap: 2rem; }
@media (max-width: 40rem) { .toc ol { columns: 1; } }
.toc li { margin-bottom: 0.3rem; font-size: 0.9375rem; }

.callout {
  border-left: 3px solid var(--green-600);
  background: var(--green-100);
  padding: 1rem 1.2rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
}
.callout.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.callout > :last-child { margin-bottom: 0; }
.callout strong { font-weight: 650; }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  margin: 1.25rem 0 1.75rem;
}
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 34rem;
  font-size: 0.9375rem;
  background: var(--paper);
}
th, td {
  text-align: left;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
thead th {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-3);
  background: var(--ground);
  font-weight: 700;
}
tbody tr:last-child td { border-bottom: 0; }

.fill {
  background: var(--warn-soft);
  color: var(--warn);
  padding: 0.05em 0.4em;
  border-radius: 4px;
  font-weight: 650;
  font-size: 0.9em;
  white-space: nowrap;
}

/* ── Forms ────────────────────────────────────────────────────────────── */

.steps { counter-reset: s; list-style: none; padding: 0; }
.steps > li {
  counter-increment: s;
  position: relative;
  padding-left: 2.6rem;
  margin-bottom: 1.4rem;
  max-width: var(--measure);
}
.steps > li::before {
  content: counter(s);
  position: absolute;
  left: 0;
  top: -0.1rem;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  background: var(--green-100);
  color: var(--green-600);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.8125rem;
}
.steps h3 { margin-top: 0; }

/* ── Footer ───────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--paper);
  border-top: 1px solid var(--rule);
  padding: 3rem 0 2.5rem;
  font-size: 0.9375rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 2rem;
  margin-bottom: 2.25rem;
}
.footer-grid h4 {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin: 0 0 0.7rem;
  font-weight: 700;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.45rem; }
.footer-grid a { color: var(--ink-2); text-decoration: none; }
.footer-grid a:hover { color: var(--green-600); }
.footer-grid p { margin: 0 0 0.45rem; color: var(--ink-2); }
.legal-line {
  border-top: 1px solid var(--rule);
  padding-top: 1.4rem;
  color: var(--ink-3);
  font-size: 0.8125rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.2rem;
  justify-content: space-between;
}
.legal-line p { margin: 0; }