:root {
  --ink: #0f172a;
  --muted: #475569;
  --soft: #64748b;
  --line: #eef2f7;
  --accent: #4f46e5;
  --accent-strong: #4338ca;
  --live: #34d399;
  --bg: #ffffff;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.35);
  outline-offset: 2px;
  border-radius: 8px;
}

/* ── Top bar ───────────────────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
}

.brand {
  font-weight: 750;
  letter-spacing: -0.01em;
}

.topbar-price {
  margin-left: auto;
  color: var(--accent-strong);
  font-weight: 650;
  font-size: 0.92rem;
}

/* ── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 0.6rem 1rem;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.9rem;
  transition: background 0.15s ease;
}

.btn:hover {
  background: var(--accent-strong);
}

.btn-lg {
  font-size: 1rem;
  padding: 0.9rem 1.35rem;
  border-radius: 12px;
}

.ghost {
  color: var(--accent);
  text-decoration: none;
  font-weight: 650;
}

.ghost:hover {
  text-decoration: underline;
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  max-width: 68rem;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 3.5rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4.6vw, 3.05rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  margin: 0 0 1rem;
}

.lede {
  color: var(--muted);
  font-size: 1.13rem;
  margin: 0;
}

.cta-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin: 1.8rem 0 1rem;
}

.fine {
  color: var(--soft);
  font-size: 0.85rem;
  margin: 0;
}

/* ── Chat mock ─────────────────────────────────────────────────────────── */
.chat {
  background: var(--ink);
  border-radius: 20px;
  padding: 1.1rem;
  box-shadow: 0 30px 60px -25px rgba(15, 23, 42, 0.55);
}

.chat-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #94a3b8;
  font-size: 0.8rem;
  margin: 0 0.2rem 0.8rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--live);
}

.msg {
  background: #1e293b;
  color: #e2e8f0;
  border-radius: 14px;
  padding: 0.75rem 0.95rem;
  margin-bottom: 0.6rem;
  font-size: 0.92rem;
}

.msg:last-child {
  margin-bottom: 0;
}

.msg b {
  color: #fff;
}

.live {
  color: var(--live);
  font-weight: 650;
}

/* ── Features ──────────────────────────────────────────────────────────── */
.features {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.25rem;
}

.feature h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.feature p {
  margin: 0;
  color: var(--soft);
  font-size: 0.93rem;
}

/* ── FAQ ───────────────────────────────────────────────────────────────── */
.faq {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.faq h2 {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.faq dl {
  display: grid;
  gap: 1.1rem;
  margin: 0;
  max-width: 46rem;
}

.faq dt {
  font-weight: 650;
}

.faq dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

/* ── Honesty + error ───────────────────────────────────────────────────── */
.honest {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.5rem 5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.warn {
  color: #b42318;
  font-weight: 600;
  margin: 1rem 0 0;
  font-size: 0.9rem;
}

.unconfigured {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 840px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.2rem;
    padding-top: 3rem;
  }

  .features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .topbar-price {
    display: none;
  }
}