/*
 * Amber landing page.
 *
 * Dark by default with a light variant, one accent colour, no images beyond the
 * logo. Everything here has to survive being read on a phone in a Telegram
 * in-app browser, which is where most of this traffic will land.
 */

:root {
  --bg: #10161d;
  --bg-soft: #16202b;
  --card: #1a2632;
  --text: #eef3f8;
  --hint: #93a1af;
  --line: #253342;
  --accent: #f0a63a;
  --accent-ink: #201403;
  --radius: 16px;
  --maxw: 1080px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --bg-soft: #f7f8fa;
    --card: #f2f4f7;
    --text: #101821;
    --hint: #5d6b7a;
    --line: #e2e7ed;
    --accent: #d9891a;
    --accent-ink: #ffffff;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0; }

section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px 20px;
}

section h2 {
  font-size: clamp(24px, 4vw, 34px);
  margin-bottom: 28px;
}

/* ----------------------------------------------------------------- header */

header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 680;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.menu { display: none; gap: 22px; margin-left: auto; }
.menu a { color: var(--hint); text-decoration: none; font-size: 15px; }
.menu a:hover { color: var(--text); }

.langs { display: flex; gap: 4px; margin-left: auto; }
.menu + .langs { margin-left: 0; }

.langs a {
  padding: 5px 8px;
  border-radius: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--hint);
  text-decoration: none;
}

.langs a[aria-current] { color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }

@media (min-width: 860px) {
  .menu { display: flex; }
}

/* ------------------------------------------------------------------- hero */

.hero { text-align: center; padding-top: 56px; padding-bottom: 40px; }

.kicker {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 13%, transparent);
}

.hero h1 {
  font-size: clamp(32px, 7vw, 60px);
  max-width: 16ch;
  margin: 0 auto;
}

.sub {
  max-width: 56ch;
  margin: 20px auto 30px;
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--hint);
}

.cta {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 12px;
  font-weight: 650;
  text-decoration: none;
  color: var(--accent-ink);
  background: var(--accent);
  transition: transform .12s ease, filter .12s ease;
}

.cta:hover { filter: brightness(1.06); transform: translateY(-1px); }

.note { margin-top: 14px; font-size: 13.5px; color: var(--hint); }
.note.center { text-align: center; margin-top: 22px; }

.proofs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 46px;
}

.proof {
  min-width: 150px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--card);
}

.proof b { display: block; font-size: 24px; letter-spacing: -0.02em; }
.proof span { font-size: 13.5px; color: var(--hint); }

/* --------------------------------------------------------------- features */

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.feature {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--card);
}

.feature h3 { font-size: 17px; margin-bottom: 8px; }
.feature p { margin: 0; color: var(--hint); font-size: 14.5px; }

/* ------------------------------------------------------------------ steps */

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--card);
}

.num {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 680;
  color: var(--accent-ink);
  background: var(--accent);
}

.step h3 { font-size: 16px; margin-bottom: 4px; }
.step p { margin: 0; color: var(--hint); font-size: 14.5px; }

/* ------------------------------------------------------------------ plans */

.plans {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: start;
}

.plan {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.plan.featured {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-soft));
}

.plan h3 { font-size: 17px; }
.price { margin: 6px 0 16px; font-size: 24px; font-weight: 680; letter-spacing: -0.02em; }
.plan ul { margin: 0; padding-left: 18px; color: var(--hint); font-size: 14.5px; }
.plan li { margin: 5px 0; }

/* -------------------------------------------------------------------- faq */

.faq { display: grid; gap: 10px; }

.qa {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
  padding: 4px 18px;
}

.qa summary {
  cursor: pointer;
  padding: 15px 0;
  font-weight: 600;
  list-style: none;
}

.qa summary::-webkit-details-marker { display: none; }

.qa summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.2;
}

.qa[open] summary::after { content: "−"; }
.qa p { margin: 0 0 16px; color: var(--hint); font-size: 15px; }

/* ------------------------------------------------------------------ final */

.final { text-align: center; }
.final h2 { margin-bottom: 24px; }

/* ----------------------------------------------------------------- footer */

footer.site {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 26px 20px 46px;
  border-top: 1px solid var(--line);
  color: var(--hint);
  font-size: 13.5px;
}

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

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

/* ------------------------------------------------------------------ prose */

.prose { max-width: 760px; }
.prose h1 { font-size: clamp(26px, 4vw, 34px); margin-bottom: 8px; }
.prose h2 { font-size: 20px; margin: 32px 0 10px; }
.prose h3 { font-size: 17px; margin: 22px 0 8px; }
.prose p { color: var(--hint); }
.prose ul { color: var(--hint); padding-left: 20px; }
.prose li { margin: 6px 0; }
.prose code {
  font: 13.5px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--card);
  padding: 2px 6px;
  border-radius: 6px;
}
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 14.5px; }
.prose th, .prose td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
.prose th { color: var(--text); font-weight: 600; }
.prose td { color: var(--hint); }
.prose a { color: var(--accent); }

.footer-links { display: flex; gap: 16px; }