:root {
  --ink: #22201D;
  --surface: #FFFFFF;
  --mist: #FAFAF8;
  --border: #E6E2DC;
  --soft: #F3F1EC;
  --muted: #79726A;

  --lava: #E63228;
  --lava-dark: #C0281F;
  --lava-soft: #F2867B;
  --lava-pale: #FBE0DE;
  --amber: #FAC80A;

  --display: 'Archivo', sans-serif;
  --body: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

.accent { color: var(--lava); }

.eyebrow {
  font-family: var(--display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lava-dark);
  margin-bottom: 10px;
}

.eyebrow.center, h2.center { text-align: center; }
h2.center { margin: 0 auto 40px; max-width: 640px; }

.section-lead {
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.6;
  max-width: 620px;
}

.center .section-lead, h2.center + .section-lead { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- botones ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
  padding: 13px 24px;
  border-radius: 10px;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--lava);
  color: #fff;
}
.btn-primary:hover { background: var(--lava-dark); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(230,50,40,0.28); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { border-color: var(--ink); }

.btn-sm { padding: 9px 16px; font-size: 13px; }
.btn-lg { padding: 15px 28px; font-size: 16px; }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
}
.brand img { width: 70px; height: 70px; object-fit: contain; }
.brand span {
  font-family: var(--display);
  font-weight: 900;
  font-size: 18px;
  color: var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  font-weight: 600;
}
.nav-links a:not(.btn):hover { color: var(--lava-dark); }

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

.hero { padding: 64px 0 40px; background: var(--mist); }

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  margin: 12px 0 20px;
}

.lead {
  font-size: 17.5px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 520px;
  margin-bottom: 30px;
}

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual { display: flex; justify-content: center; }

.chat-mock {
  width: 100%;
  max-width: 340px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(34,32,29,0.12);
  overflow: hidden;
}

.chat-mock-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.chat-mock-head .dot {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--lava), var(--amber));
  flex-shrink: 0;
}
.chat-mock-name { font-family: var(--display); font-weight: 800; font-size: 13.5px; }
.chat-mock-sub { font-size: 11.5px; color: var(--muted); }

.chat-mock-body { padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; }
.bubble { padding: 10px 13px; border-radius: 13px; font-size: 13px; line-height: 1.45; max-width: 88%; }
.bubble-them { background: var(--soft); color: var(--ink); align-self: flex-start; border-bottom-left-radius: 4px; }
.bubble-me { background: var(--lava); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }

.chat-mock-timer {
  padding: 10px 18px 16px;
  font-size: 11px;
  font-weight: 700;
  color: var(--lava-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- problema ---------- */

.problema { padding: 60px 0; text-align: center; }
.problema h2 { font-size: clamp(24px, 3.4vw, 32px); margin-bottom: 16px; }
.problema .section-lead { margin: 0 auto; }

/* ---------- como funciona ---------- */

.como-funciona { padding: 64px 0; background: var(--mist); }
.como-funciona h2 { font-size: clamp(26px, 3.6vw, 34px); }

.pasos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 44px;
}

.paso {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 20px;
}

.paso-num {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--lava);
  color: #fff;
  font-family: var(--display);
  font-weight: 800;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}

.paso h3 { font-size: 16px; margin-bottom: 8px; }
.paso p { font-size: 13.5px; color: var(--muted); line-height: 1.55; }

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

.features { padding: 64px 0; }
.features h2 { font-size: clamp(26px, 3.6vw, 34px); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}

.feature {
  padding: 22px 4px;
  border-top: 3px solid var(--amber);
}
.feature:nth-child(3n+2) { border-top-color: var(--lava); }
.feature:nth-child(3n) { border-top-color: var(--lava-soft); }

.feature h3 { font-size: 16.5px; margin-bottom: 8px; }
.feature p { font-size: 13.5px; color: var(--muted); line-height: 1.55; }

/* ---------- caso de uso ---------- */

.caso-uso { padding: 64px 0; background: var(--lava-pale); color: var(--ink); }
.caso-uso h2 { color: var(--ink); font-size: clamp(26px, 3.6vw, 36px); margin: 10px 0 16px; }
.caso-uso .eyebrow { color: var(--lava-dark); }
.caso-uso .section-lead { color: #6B5650; margin-bottom: 26px; }
.caso-uso-inner { max-width: 620px; }

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

.cta-final { padding: 76px 0; text-align: center; }
.cta-logo { width: 139px; height: 139px; object-fit: contain; margin-bottom: 18px; }
.cta-final h2 { font-size: clamp(26px, 3.6vw, 36px); margin-bottom: 12px; }
.cta-final .section-lead { margin: 0 auto 28px; }

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

.footer { padding: 28px 0; border-top: 1px solid var(--border); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer .brand img { width: 53px; height: 53px; }
.footer .brand span { font-size: 15px; }
.footer-copy { font-size: 12.5px; color: var(--muted); }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .pasos { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 14px; }
  .nav-links a:not(.btn) { display: none; }
}

@media (max-width: 520px) {
  .pasos { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
}