/* ============================================
   Atiende — sistema de diseño
   ============================================ */

:root{
  --bg: #F5F5F5;
  --bg-soft: #EBEBEB;
  --ink: #121212;
  --ink-dim: #5A5A5A;
  --line: rgba(18,18,18,0.14);
  --accent: #D6201E;
  --accent-ink: #FFFFFF;
  --confirm: #8C8F92;
  --confirm-bg: #EBEBEB;
  --panel-dark: #0B0B0B;
  --panel-dark-ink: #F5F5F5;
  --radius-sm: 6px;
  --radius-md: 14px;
  --max-w: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .display{
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1{ font-size: clamp(2.1rem, 4.4vw, 3.4rem); }
h2{ font-size: clamp(1.6rem, 2.8vw, 2.2rem); }
h3{ font-size: 1.25rem; font-weight: 600; }

p{ margin: 0 0 1em; max-width: 62ch; color: var(--ink-dim); }
a{ color: inherit; }

.container{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Header ---------- */

.site-header{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(242,244,241,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo{
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo img{
  border-radius: 50%;
  display: block;
}

.logo span{ color: var(--accent); }

.nav{
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav a{
  text-decoration: none;
  color: var(--ink-dim);
  font-size: 0.96rem;
}

.nav a:hover, .nav a.active{ color: var(--ink); }

.nav-toggle{
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span{
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}

/* ---------- Buttons ---------- */

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.98rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary{
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover{ background: #A9110F; }

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

.btn-dark{
  background: var(--panel-dark);
  color: var(--panel-dark-ink);
}
.btn-dark:hover{ background: #0f1512; }

.btn-row{ display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Hero ---------- */

.hero{
  padding: 76px 0 90px;
}

.hero .container{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow-plain{
  color: var(--accent);
  font-size: 0.95rem;
  margin-bottom: 14px;
  font-weight: 500;
}

.hero h1{ max-width: 12ch; }

.hero-actions{ margin-top: 32px; }

/* Chat mockup */

.phone{
  background: var(--panel-dark);
  border-radius: 22px;
  padding: 18px;
  transform: rotate(1.4deg);
  box-shadow: 0 24px 50px rgba(27,35,32,0.22);
}

.phone-bar{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 6px 16px;
  border-bottom: 1px solid rgba(242,244,241,0.14);
  margin-bottom: 14px;
}

.phone-avatar{
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center;
  font-family: "Fraunces", serif;
  font-weight: 600;
}

.phone-name{ color: var(--panel-dark-ink); font-size: 0.95rem; font-weight: 500; }
.phone-status{ color: rgba(242,244,241,0.55); font-size: 0.78rem; }

.bubble{
  max-width: 82%;
  padding: 10px 14px;
  border-radius: 14px;
  margin-bottom: 10px;
  font-size: 0.93rem;
  line-height: 1.4;
}

.bubble.in{
  background: #2A342F;
  color: #EDEFEC;
  border-bottom-left-radius: 4px;
}

.bubble.out{
  background: var(--accent);
  color: var(--accent-ink);
  margin-left: auto;
  border-bottom-right-radius: 4px;
}

/* ---------- Sections ---------- */

section{ padding: 70px 0; }
.section-alt{ background: var(--bg-soft); }

.section-head{ max-width: 56ch; margin-bottom: 44px; }

.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.grid-3.grid-4{
  grid-template-columns: repeat(2, 1fr);
}

.feature h3{ margin-bottom: 8px; }
.feature{ border-top: 1px solid var(--line); padding-top: 18px; }

/* Steps (genuine sequence) */

.steps{ counter-reset: step; display: flex; flex-direction: column; gap: 0; }

.step{
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.step:last-child{ border-bottom: 1px solid var(--line); }

.step-num{
  counter-increment: step;
  font-family: "Fraunces", serif;
  font-size: 1.6rem;
  color: var(--accent);
}
.step-num::before{ content: counter(step); }

/* Pricing */

.pricing-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.plan{
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}

.plan.is-featured{
  background: var(--panel-dark);
  color: var(--panel-dark-ink);
  border-color: var(--panel-dark);
}

.plan.is-featured p, .plan.is-featured li{ color: rgba(242,244,241,0.75); }
.plan.is-featured h3{ color: var(--panel-dark-ink); }

.plan-price{
  font-family: "Fraunces", serif;
  font-size: 1.5rem;
  margin: 10px 0 18px;
}

.plan ul{ list-style: none; padding: 0; margin: 0 0 28px; flex-grow: 1; }
.plan li{
  padding: 9px 0;
  border-top: 1px solid var(--line);
  font-size: 0.94rem;
  color: var(--ink-dim);
}
.plan.is-featured li{ border-top-color: rgba(242,244,241,0.16); }
.plan li:first-child{ border-top: none; }

/* FAQ */

.faq-item{ border-top: 1px solid var(--line); padding: 20px 0; }
.faq-item:last-child{ border-bottom: 1px solid var(--line); }
.faq-item summary{
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.faq-item summary::-webkit-details-marker{ display: none; }
.faq-item summary::after{ content: "+"; color: var(--accent); font-size: 1.2rem; }
.faq-item[open] summary::after{ content: "–"; }
.faq-item p{ margin-top: 12px; }

/* Demo page */

.demo-panel{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 50px;
  align-items: center;
}

.demo-note{
  background: var(--confirm-bg);
  border: 1px solid rgba(18,18,18,0.14);
  color: var(--ink);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 0.92rem;
  margin-top: 22px;
}

/* Contact */

.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.field{ margin-bottom: 18px; }
.field label{ display: block; font-size: 0.9rem; margin-bottom: 6px; color: var(--ink-dim); }
.field input, .field textarea{
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.98rem;
  background: #fff;
  color: var(--ink);
}
.field textarea{ resize: vertical; min-height: 110px; }

.contact-info dt{ color: var(--ink-dim); font-size: 0.88rem; margin-top: 20px; }
.contact-info dd{ margin: 4px 0 0; font-size: 1.05rem; }

/* ---------- Footer ---------- */

footer{
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
footer .container{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
footer p{ margin: 0; font-size: 0.88rem; }

/* ---------- Responsive ---------- */

@media (max-width: 860px){
  .hero .container, .demo-panel, .contact-grid{
    grid-template-columns: 1fr;
  }
  .grid-3, .pricing-grid{ grid-template-columns: 1fr; }
  .nav{
    display: none;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 28px 28px;
    border-bottom: 1px solid var(--line);
    gap: 18px;
  }
  .nav.is-open{ display: flex; }
  .nav-toggle{ display: block; }
  .phone{ transform: none; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
}

:focus-visible{
  outline: 2px solid var(--confirm);
  outline-offset: 2px;
}