/* Chat7 website. Plain CSS, no build step, no third-party requests. */

:root {
  --brand: #00B3AA;          /* the logo teal */
  --brand-ink: #032B29;      /* text on brand teal (5.8:1) */
  --accent: #007A73;         /* links and teal text on light (5.2:1) */
  --bg: #FFFFFF;
  --bg-soft: #F2FAF9;
  --surface: #FFFFFF;
  --line: #D8E9E7;
  --text: #0B1F1E;
  --muted: #4F6563;
  --hero-from: #E6F7F5;
  --hero-to: #FFFFFF;
  --bubble-in: #FFFFFF;
  --bubble-out: #CFF3EF;
  --phone: #0B1F1E;
  --screen: #EEF6F5;
  --warn-bg: #FFF4D6;
  --warn-line: #E8C25A;
  --warn-text: #4A3700;
  --shadow: 0 1px 2px rgba(3, 43, 41, .06), 0 8px 24px rgba(3, 43, 41, .08);
  --radius: 18px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #00B3AA;
    --brand-ink: #021C1B;
    --accent: #3DD9CE;
    --bg: #071716;
    --bg-soft: #0B201F;
    --surface: #0E2423;
    --line: #1C3A38;
    --text: #E6F4F3;
    --muted: #9DB5B2;
    --hero-from: #0A2624;
    --hero-to: #071716;
    --bubble-in: #16302E;
    --bubble-out: #00524E;
    --phone: #000000;
    --screen: #0B1C1B;
    --warn-bg: #2E2508;
    --warn-line: #8A6D17;
    --warn-text: #F5DE9A;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

*, *::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: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; }

/* Keep the footer at the bottom on short pages */
body { min-height: 100vh; display: flex; flex-direction: column; }
body > main { flex: 1 0 auto; }
body > .site-header { width: 100%; }

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--surface); padding: 8px 12px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.logo { display: inline-flex; align-items: center; flex: none; }
.logo img { height: 30px; width: auto; display: block; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.nav a {
  color: var(--text); text-decoration: none; font-size: 15px; font-weight: 500;
  padding: 8px 10px; border-radius: 10px; white-space: nowrap;
}
.nav a:hover { background: var(--bg-soft); }
.nav .lang { border: 1px solid var(--line); font-weight: 600; }
@media (max-width: 560px) {
  .nav .hide-sm { display: none; }
  .nav { gap: 2px; }
  .nav a { padding: 8px 7px; font-size: 14.5px; }
  .logo img { height: 24px; }
  .wrap { padding: 0 16px; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px; border-radius: 999px;
  font-weight: 650; font-size: 16px; text-decoration: none; border: 2px solid transparent;
}
.btn-primary { background: var(--brand); color: var(--brand-ink); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--brand); }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--text);
}
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }

/* Home: hero and feature bands, each one heading, one line and one screenshot */
.hero { background: linear-gradient(180deg, var(--hero-from), var(--hero-to)); padding: 64px 0 24px; overflow: hidden; }
.hero .wrap, .band .wrap {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 56px; align-items: center; max-width: 980px;
}
.hero h1 { font-size: clamp(40px, 6.4vw, 68px); line-height: 1.04; letter-spacing: -.03em; margin: 0 0 16px; }
.lead { font-size: clamp(19px, 2.2vw, 22px); color: var(--muted); max-width: 26em; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.stores { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.shot {
  display: block; width: 300px; max-width: 78vw; height: auto; justify-self: center;
  filter: drop-shadow(0 18px 36px rgba(0, 60, 57, .22));
}
.band { padding: 64px 0; }
.band + .band { border-top: 1px solid var(--line); }
.band.flip .band-copy { order: 2; }
.band h2 { font-size: clamp(30px, 4vw, 44px); line-height: 1.1; letter-spacing: -.02em; margin: 0 0 12px; }
.band p { font-size: clamp(18px, 2vw, 20px); color: var(--muted); max-width: 24em; margin: 0; }
.band p.more { font-size: 16px; margin-top: 14px; }
@media (max-width: 760px) {
  .hero { padding: 40px 0 8px; }
  .hero .wrap, .band .wrap { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .band.flip .band-copy { order: 0; }
  .lead, .band p { margin-left: auto; margin-right: auto; }
  .cta, .stores { justify-content: center; }
  .band { padding: 48px 0; }
  .shot { width: 260px; }
}

h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.15; letter-spacing: -.015em; margin: 0 0 14px; }
.eyebrow { font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 8px; }

/* Plain pages (privacy, terms, support, delete) */
.page { padding: 48px 0 72px; }
.page h1 { font-size: clamp(30px, 4.4vw, 44px); line-height: 1.12; letter-spacing: -.02em; margin: 0 0 10px; }
.page .meta { color: var(--muted); margin: 0 0 28px; }
.prose h2 { font-size: 24px; margin: 40px 0 10px; }
.prose h3 { font-size: 19px; margin: 26px 0 8px; }
.prose p, .prose li { color: var(--text); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.prose th { background: var(--bg-soft); font-weight: 650; }
.prose mark.todo { background: var(--warn-bg); color: var(--warn-text); border: 1px solid var(--warn-line); border-radius: 4px; padding: 0 3px; }
.prose code { font-size: .92em; background: var(--bg-soft); padding: 1px 5px; border-radius: 5px; }

.draft-banner {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-text);
  border-radius: 14px; padding: 14px 16px; margin: 0 0 28px; font-size: 15.5px;
}
.draft-banner strong { display: block; font-size: 16px; }

.steps { counter-reset: s; list-style: none; padding: 0; display: grid; gap: 12px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 36px 1fr; gap: 12px; align-items: start; }
.steps li::before {
  content: counter(s); width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center;
  background: var(--brand); color: var(--brand-ink); font-weight: 750;
}

.faq details { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); margin: 0 0 10px; }
.faq summary { cursor: pointer; padding: 16px 18px; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq .a { padding: 0 18px 16px; color: var(--muted); }
.faq .a p { margin: 0 0 10px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 28px 0 36px; font-size: 15px; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 32px; align-items: center; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }
.site-footer .copy { margin: 0; font-size: 14px; }
.soon { padding: 96px 0 120px; text-align: center; }
.soon .lead { margin: 0 auto 18px; }
.faq h2.eyebrow { margin: 32px 0 12px; }
.prose .steps { padding-left: 0; }