/* ============================================================
   TALKTCO — Design tokens
   Dirección: "sala de control" de un operador ISP. Fondo casi
   negro tipo NOC, datos en vivo, verde-señal para "conectado",
   violeta para IA, ámbar para dinero. La red (nodos + pulsos)
   es el elemento de firma: la plataforma que "trabaja sola".
   ============================================================ */

:root{
  --bg:            #070B13;
  --bg-elevated:   #0C1220;
  --surface:       #111A2C;
  --surface-2:     #16213A;
  --border:        #1E2A42;
  --border-soft:   #17223A;

  --text:          #EAF0F8;
  --text-dim:      #93A2BA;
  --text-faint:    #5C6B85;

  --signal:        #33E8C6;   /* teal — "en línea", automatización de red */
  --signal-dim:    #33E8C633;
  --ai:            #A78BFA;   /* violeta — módulos con IA */
  --ai-dim:        #A78BFA33;
  --money:         #F4B84A;   /* ámbar — pagos / facturación */
  --money-dim:     #F4B84A33;
  --alert:         #FF6B6B;   /* rojo — fallas / alertas */

  --font-display:  'Space Grotesk', system-ui, sans-serif;
  --font-body:     'Inter', system-ui, sans-serif;
  --font-mono:     'JetBrains Mono', ui-monospace, monospace;

  --radius:        14px;
  --radius-sm:     8px;
  --container:     1180px;
}

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

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Textura de fondo: retícula muy tenue, como un panel técnico */
body{
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
button{ font-family: inherit; cursor: pointer; }

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

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}
.eyebrow::before{
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-dim);
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink{ 0%,100%{ opacity: 1; } 50%{ opacity: .35; } }

h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--text);
}

.section-head{
  max-width: 640px;
  margin-bottom: 52px;
}
.section-head h2{
  font-size: clamp(28px, 3.6vw, 40px);
  margin-top: 14px;
  line-height: 1.15;
}
.section-head p{
  margin-top: 14px;
  color: var(--text-dim);
  font-size: 17px;
}
.section-tag{ color: var(--brand-tag, var(--signal)); }

section{ padding: 108px 0; position: relative; }
section + section{ border-top: 1px solid var(--border-soft); }

/* ---------- Header ---------- */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(7, 11, 19, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.site-header.is-scrolled{
  border-bottom-color: var(--border);
  background: rgba(7, 11, 19, 0.92);
}
.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
}
.brand-mark{
  width: 26px; height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--signal), var(--ai));
  position: relative;
  flex-shrink: 0;
}
.brand-mark::after{
  content: '';
  position: absolute; inset: 6px;
  border-radius: 3px;
  background: var(--bg);
}
.main-nav{ display: flex; gap: 34px; }
.main-nav a{
  font-size: 14.5px;
  color: var(--text-dim);
  transition: color .2s ease;
}
.main-nav a:hover{ color: var(--text); }

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  white-space: nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{
  background: var(--signal);
  color: #04140F;
  box-shadow: 0 0 0 0 var(--signal-dim);
}
.btn-primary:hover{ box-shadow: 0 0 26px var(--signal-dim); transform: translateY(-1px); }
.btn-ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover{ border-color: var(--text-faint); }

.nav-cta{ display: flex; align-items: center; gap: 16px; }
.menu-toggle{
  display: none;
  background: none; border: 1px solid var(--border);
  border-radius: 8px; width: 40px; height: 40px;
  color: var(--text);
  align-items: center; justify-content: center;
}

/* ---------- Hero ---------- */
.hero{
  padding-top: 168px;
  padding-bottom: 100px;
  overflow: hidden;
  position: relative;
}
.hero .container{
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero h1{
  font-size: clamp(36px, 4.6vw, 58px);
  line-height: 1.08;
  margin-top: 18px;
}
.hero h1 em{
  font-style: normal;
  background: linear-gradient(100deg, var(--signal), var(--ai) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede{
  margin-top: 20px;
  font-size: 18px;
  color: var(--text-dim);
  max-width: 480px;
}
.hero-actions{
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.hero-meta{
  margin-top: 40px;
  display: flex;
  gap: 36px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
}
.hero-meta strong{ display: block; color: var(--text); font-size: 15px; font-family: var(--font-display); }

/* Signature element: red de nodos animada */
.network-stage{
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  margin-left: auto;
}
.network-stage svg{ width: 100%; height: 100%; overflow: visible; }
.network-stage .node{ fill: var(--surface-2); stroke: var(--border); stroke-width: 1.5; }
.network-stage .node.core{ fill: var(--signal); stroke: none; }
.network-stage .link{ stroke: var(--border); stroke-width: 1.4; fill: none; }
.network-stage .pulse{
  fill: var(--signal);
  filter: drop-shadow(0 0 6px var(--signal));
}
.network-stage .node-label{
  font-family: var(--font-mono);
  font-size: 9px;
  fill: var(--text-faint);
}
.network-stage .core-label{
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  fill: var(--bg);
  text-anchor: middle;
}
.network-ring{
  position: absolute; inset: 8%;
  border: 1px dashed var(--border);
  border-radius: 50%;
  animation: spin 60s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

/* ---------- Pain points (grid con tag por dolor) ---------- */
.pain-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.pain-card{
  background: var(--bg-elevated);
  padding: 30px 26px;
  min-height: 210px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.pain-card .tag{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--alert);
}
.pain-card h3{
  font-size: 19px;
  margin-top: 30px;
}
.pain-card p{
  margin-top: 10px;
  color: var(--text-dim);
  font-size: 14.5px;
}

/* ---------- Pillars (solución) ---------- */
.pillar-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pillar-card{
  padding: 34px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color .2s ease, transform .2s ease;
}
.pillar-card:hover{ border-color: var(--signal); transform: translateY(-3px); }
.pillar-icon{
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--signal-dim);
  color: var(--signal);
  margin-bottom: 22px;
}
.pillar-card h3{ font-size: 20px; }
.pillar-card p{ margin-top: 10px; color: var(--text-dim); font-size: 15px; }

/* ---------- Módulos ---------- */
.module-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.module-card{
  padding: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}
.module-icon{
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--signal);
  margin-bottom: 20px;
}
.module-card h3{ font-size: 17.5px; }
.module-card p{ margin-top: 8px; font-size: 14.5px; color: var(--text-dim); }

/* ---------- Feature split (contratos) ---------- */
.split{
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  align-items: center;
}
.split.reverse .split-visual{ order: 2; }
.split.reverse .split-copy{ order: 1; }
.feature-list{ margin-top: 30px; display: grid; gap: 18px; }
.feature-list li{ display: flex; gap: 14px; align-items: flex-start; }
.feature-dot{
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--signal); margin-top: 7px; flex-shrink: 0;
}
.feature-list h4{ font-size: 15.5px; font-weight: 600; }
.feature-list span{ display: block; margin-top: 3px; font-size: 14px; color: var(--text-dim); }

/* Mock de contrato firmado */
.contract-mock{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  font-family: var(--font-mono);
}
.contract-mock .doc-head{
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 18px; border-bottom: 1px solid var(--border);
  font-size: 11px; letter-spacing: .06em; color: var(--text-faint);
}
.contract-mock .doc-title{
  margin: 22px 0 18px;
  font-family: var(--font-display);
  color: var(--text);
  font-size: 15px;
}
.contract-mock .doc-line{ height: 8px; background: var(--surface-2); border-radius: 4px; margin-bottom: 10px; }
.contract-mock .doc-line.w-80{ width: 80%; }
.contract-mock .doc-line.w-60{ width: 60%; }
.contract-mock .doc-line.w-90{ width: 90%; }
.signature-box{
  margin-top: 26px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 18px;
  display: flex; justify-content: space-between; align-items: center;
}
.signature-box svg{ width: 110px; height: 34px; }
.signature-box .sig-meta{ font-size: 10.5px; color: var(--signal); text-align: right; }
.signature-box .sig-meta strong{ display: block; color: var(--text); font-size: 12px; }

/* ---------- Automatización de red ---------- */
.flow-strip{
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px;
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 40px;
  overflow-x: auto;
}
.flow-step{
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 13px; color: var(--text);
  white-space: nowrap;
}
.flow-step .flow-dot{
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px var(--signal-dim);
}
.flow-arrow{ color: var(--text-faint); font-size: 16px; padding: 0 6px; }
.chip-row{ display: flex; flex-wrap: wrap; gap: 12px; }
.chip{
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  background: var(--bg-elevated);
}
.chip.is-multi{ color: var(--ai); border-color: var(--ai-dim); }

/* ---------- Chatbot ---------- */
.chatbot-section{ background: var(--bg-elevated); }
.chat-window{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  max-width: 420px;
}
.chat-window .chat-head{
  display: flex; align-items: center; gap: 10px;
  padding-bottom: 16px; margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px; font-weight: 600;
}
.chat-window .chat-head .dot{
  width: 8px; height: 8px; border-radius: 50%; background: var(--signal);
}
.chat-bubble{
  max-width: 82%;
  padding: 11px 15px;
  border-radius: 14px;
  font-size: 14px;
  margin-bottom: 10px;
  line-height: 1.4;
}
.chat-bubble.user{
  margin-left: auto;
  background: var(--signal);
  color: #04140F;
  border-bottom-right-radius: 4px;
}
.chat-bubble.bot{
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}
.stat-callout{
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ai);
  padding: 14px 18px;
  border: 1px solid var(--ai-dim);
  border-radius: var(--radius-sm);
  background: rgba(167,139,250,0.06);
}
.chatbot-section .split{ grid-template-columns: 1.05fr 0.95fr; }
.chatbot-section .split-visual{ order: 2; }
.chatbot-section .split-copy{ order: 1; }

/* ---------- Pagos ---------- */
.payment-flow{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.payment-step{
  padding: 26px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}
.payment-step .step-index{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--money);
}
.payment-step h4{ margin-top: 14px; font-size: 16px; }
.payment-step p{ margin-top: 6px; font-size: 13.5px; color: var(--text-dim); }
.payment-step:not(:last-child)::after{
  content: '→';
  position: absolute;
  right: -22px; top: 50%; transform: translateY(-50%);
  color: var(--text-faint); font-size: 15px;
  display: none;
}
@media (min-width: 900px){
  .payment-step:not(:last-child)::after{ display: block; }
}

/* ---------- Técnicos ---------- */
.tech-map{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  position: relative;
  min-height: 340px;
  overflow: hidden;
}
.tech-map .grid-overlay{
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .6;
}
.tech-pin{
  position: absolute;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 5px var(--signal-dim);
}
.tech-pin::after{
  content: '';
  position: absolute; inset: -14px;
  border: 1px solid var(--signal-dim);
  border-radius: 50%;
  animation: ping 2.6s ease-out infinite;
}
@keyframes ping{ 0%{ transform: scale(0.5); opacity: .9; } 100%{ transform: scale(1.6); opacity: 0; } }
.tech-count{
  position: absolute; bottom: 22px; left: 26px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  background: rgba(7,11,19,0.7);
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* ---------- Visión ejecutiva / dashboard en vivo ---------- */
.vision-section{ background: var(--bg-elevated); }
.dashboard{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
}
.dashboard-head{
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap; gap: 12px;
}
.dashboard-head .live-tag{
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; color: var(--signal);
}
.stat-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}
.stat-tile{
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 22px;
}
.stat-tile .value{
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
}
.stat-tile .label{
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
}
.feed-list{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.feed-item{
  display: flex; align-items: center; gap: 10px;
  font-size: 13.5px;
  color: var(--text-dim);
  padding: 12px 14px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
}
.feed-item .feed-dot{
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal); flex-shrink: 0;
}

/* ---------- Resultados ---------- */
.results-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.result-tile{
  background: var(--bg-elevated);
  padding: 40px 26px;
  text-align: left;
}
.result-tile .value{
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  background: linear-gradient(100deg, var(--signal), var(--ai) 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.result-tile p{ margin-top: 12px; color: var(--text-dim); font-size: 14px; }
.results-note{
  margin-top: 22px;
  font-size: 12.5px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}

/* ---------- Plan / pricing ---------- */
.plan-section .container{ display: flex; justify-content: center; }
.plan-card{
  max-width: 620px;
  width: 100%;
  background: linear-gradient(180deg, var(--surface), var(--bg-elevated));
  border: 1px solid var(--signal-dim);
  border-radius: 20px;
  padding: 46px;
  position: relative;
}
.plan-badge{
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--signal);
  padding: 6px 12px;
  border-radius: 999px;
}
.plan-card h3{ font-size: 30px; margin-top: 20px; }
.plan-price{
  margin-top: 18px;
  display: flex; align-items: baseline; gap: 10px;
}
.plan-price .amount{
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
}
.plan-price .period{ color: var(--text-dim); font-size: 14px; }
.plan-list{
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.plan-list li{ display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--text); }
.plan-list .check{ color: var(--signal); flex-shrink: 0; margin-top: 1px; }
.plan-note{
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text-dim);
}
.plan-card .btn{ margin-top: 30px; width: 100%; justify-content: center; padding: 14px; font-size: 15.5px; }

/* ---------- CTA final / demo form ---------- */
.cta-section{
  background:
    radial-gradient(circle at 20% 20%, rgba(51,232,198,0.08), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(167,139,250,0.08), transparent 45%),
    var(--bg-elevated);
}
.cta-section .container{
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 60px;
  align-items: start;
}
.cta-section h2{ font-size: clamp(30px, 4vw, 44px); line-height: 1.1; }
.cta-section .lede{ margin-top: 16px; color: var(--text-dim); font-size: 17px; max-width: 440px; }
.cta-contacts{ margin-top: 34px; display: grid; gap: 12px; font-family: var(--font-mono); font-size: 14px; color: var(--text-dim); }
.cta-contacts a{ color: var(--text); }

.demo-form{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}
.form-row{ margin-bottom: 18px; }
.form-row label{
  display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 7px;
}
.form-row input, .form-row textarea{
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14.5px;
  transition: border-color .2s ease;
}
.form-row input:focus, .form-row textarea:focus{
  outline: none; border-color: var(--signal);
}
.form-row textarea{ resize: vertical; min-height: 84px; }
.demo-form .btn{ width: 100%; justify-content: center; padding: 13px; }
.form-note{ margin-top: 14px; font-size: 12px; color: var(--text-faint); text-align: center; }
.hp-field{ position: absolute; left: -9999px; opacity: 0; }
.form-status{ margin-top: 14px; font-size: 13.5px; padding: 10px 14px; border-radius: var(--radius-sm); display: none; }
.form-status.show{ display: block; }
.form-status.ok{ background: var(--signal-dim); color: var(--signal); }
.form-status.err{ background: rgba(255,107,107,0.12); color: var(--alert); }

/* ---------- Footer ---------- */
.site-footer{ padding: 44px 0; }
.site-footer .container{
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.footer-links{ display: flex; gap: 24px; }
.footer-links a{ font-size: 13.5px; color: var(--text-dim); }
.footer-links a:hover{ color: var(--text); }
.footer-copy{ font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }

/* ---------- Reveal on scroll ---------- */
.reveal{ opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1080px){
  .pain-grid{ grid-template-columns: repeat(2, 1fr); }
  .module-grid{ grid-template-columns: repeat(2, 1fr); }
  .stat-grid{ grid-template-columns: repeat(2, 1fr); }
  .results-grid{ grid-template-columns: repeat(2, 1fr); }
  .plan-list{ grid-template-columns: 1fr; }
}

@media (max-width: 900px){
  .main-nav{ display: none; }
  .menu-toggle{ display: flex; }
  .hero .container{ grid-template-columns: 1fr; }
  .network-stage{ margin: 40px auto 0; max-width: 380px; }
  .split, .cta-section .container{ grid-template-columns: 1fr; }
  .split.reverse .split-visual, .split .split-visual{ order: -1; }
  .chatbot-section .split-visual{ order: -1; }
  .pillar-grid, .payment-flow{ grid-template-columns: 1fr; }
  .feed-list{ grid-template-columns: 1fr; }
}

@media (max-width: 620px){
  section{ padding: 76px 0; }
  .pain-grid{ grid-template-columns: 1fr; }
  .module-grid{ grid-template-columns: 1fr; }
  .stat-grid{ grid-template-columns: 1fr; }
  .results-grid{ grid-template-columns: 1fr; }
  .plan-card{ padding: 30px 24px; }
  .flow-strip{ justify-content: flex-start; }
}