/* ==========================================================
   TETRACOLOR.PE — styles.css
   Sistema de diseño basado en los colores de marca extraídos
   del isotipo: verde, magenta, naranja y azul sobre fondo negro.
   Sin dependencias externas (fuentes del sistema, sin CDN).
   ========================================================== */

/* -------------------- Tokens -------------------- */
:root{
  --color-bg: #000000;
  --color-surface: #121214;
  --color-surface-2: #18191c;
  --color-border: #2a2b2f;
  --color-text: #f5f5f3;
  --color-text-muted: #a9aaae;

  --color-green: #4aa02f;
  --color-magenta: #bc2b6b;
  --color-purple: #62156d;
  --color-orange: #db9533;
  --color-deep-orange: #d78323;
  --color-blue: #0178a9;

  --font-display: -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

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

  --transition: 220ms ease;
}

/* -------------------- Reset -------------------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1, h2, h3, p{ margin: 0; }
button{ font: inherit; }
svg{ fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* Skip link */
.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-green);
  color: #000;
  padding: 10px 16px;
  z-index: 200;
  border-radius: 0 0 8px 0;
  font-weight: 700;
}
.skip-link:focus{ left: 0; }

:focus-visible{
  outline: 2px solid var(--color-green);
  outline-offset: 3px;
}

.container{
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow{ max-width: 760px; }

/* -------------------- Eyebrow / structural label -------------------- */
.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(--color-text-muted);
  margin-bottom: 14px;
}
.eyebrow-dot, .dot{
  width: 9px;
  height: 9px;
  border-radius: 2px;
  flex: none;
  display: inline-block;
}
.dot-green{ background: var(--color-green); }
.dot-magenta{ background: var(--color-magenta); }
.dot-orange{ background: var(--color-orange); }
.dot-blue{ background: var(--color-blue); }

/* -------------------- Buttons -------------------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: linear-gradient(90deg, var(--color-green), var(--color-blue));
  color: #04110a;
}
.btn-secondary{
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover{ border-color: var(--color-text-muted); }
.btn-whatsapp{
  background: var(--color-surface-2);
  border-color: var(--color-border);
  color: var(--color-text);
  padding: 9px 16px;
  font-size: 14px;
}
.btn-whatsapp .icon{ width: 18px; height: 18px; }
.btn-whatsapp:hover{ border-color: var(--color-green); }
.btn-lg{ padding: 16px 32px; font-size: 16px; }

/* -------------------- Header -------------------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0,0,0,0.86);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand-logo{ height: 40px; width: auto; }

.main-nav ul{
  display: flex;
  gap: 28px;
}
.main-nav a{
  font-size: 14.5px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition);
  padding: 6px 2px;
}
.main-nav a:hover{ color: var(--color-text); }

.header-actions{ display: flex; align-items: center; gap: 14px; }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}
.nav-toggle span{
  display: block;
  height: 2px;
  margin: 0 8px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* -------------------- Hero -------------------- */
.hero{
  position: relative;
  overflow: hidden;
  padding: 96px 0 84px;
  isolation: isolate;
}
.hero-ring{
  position: absolute;
  top: 50%;
  right: -220px;
  transform: translateY(-50%);
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: conic-gradient(from 140deg,
    var(--color-green) 0deg,
    var(--color-blue) 90deg,
    var(--color-purple) 150deg,
    var(--color-magenta) 210deg,
    var(--color-orange) 300deg,
    var(--color-green) 360deg);
  -webkit-mask: radial-gradient(circle, transparent 62%, black 63%, black 74%, transparent 75%);
          mask: radial-gradient(circle, transparent 62%, black 63%, black 74%, transparent 75%);
  opacity: 0.55;
  z-index: -1;
  animation: spin 40s linear infinite;
}
@keyframes spin{ to{ transform: translateY(-50%) rotate(360deg); } }

.hero-inner{ max-width: 720px; }
.hero h1{
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.hero-subtitle{
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-actions{ display: flex; flex-wrap: wrap; gap: 14px; }

/* -------------------- Sections -------------------- */
.section{ padding: 84px 0; }
.section-alt{ background: var(--color-surface); }
.section h2{
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  max-width: 680px;
}
.section-lead, .lead-text{
  color: var(--color-text-muted);
  font-size: 17px;
  max-width: 680px;
  margin-bottom: 20px;
}
.lead-text{ font-size: 18px; }

/* -------------------- Grid / Cards -------------------- */
.grid{ display: grid; gap: 20px; margin-top: 40px; }
.grid-services{ grid-template-columns: repeat(4, 1fr); }
.grid-solutions{ grid-template-columns: repeat(4, 1fr); }

.card{
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px 22px 24px;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.card:hover{ border-color: var(--color-text-muted); transform: translateY(-3px); }
.card-accent{
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  border-radius: 0;
}
.card-icon{ width: 30px; height: 30px; color: var(--color-text); margin-bottom: 16px; }
.card h3{ font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.card p{ font-size: 14.5px; color: var(--color-text-muted); }

/* -------------------- Brand list -------------------- */
.brands-lead{ font-weight: 600; margin-bottom: 14px; color: var(--color-text); }
.brand-list{ display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.brand-chip{
  padding: 10px 20px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-weight: 700;
  font-size: 14.5px;
  background: var(--color-surface-2);
  letter-spacing: 0.01em;
}
.brand-chip-featured{
  border-color: transparent;
  background: linear-gradient(90deg, var(--color-green), var(--color-blue));
  color: #04110a;
}

.callout{
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  max-width: 680px;
}
.callout-dot{ margin-top: 6px; border-radius: 3px; }
.callout p{ font-size: 15px; color: var(--color-text-muted); }
.callout strong{ color: var(--color-text); }

/* -------------------- Product chips -------------------- */
.product-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 36px;
}
.product-chip{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14.5px;
  background: var(--color-surface);
}

/* -------------------- Solutions -------------------- */
.solution{
  border-top: 3px solid var(--color-border);
  padding-top: 18px;
}
.solution-bar{
  display: block;
  width: 42px;
  height: 4px;
  margin-top: -3px;
  margin-bottom: 18px;
  border-radius: 2px;
}
.solution h3{ font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.solution p{ font-size: 14.5px; color: var(--color-text-muted); }

/* -------------------- CTA -------------------- */
.cta{
  padding: 70px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.cta-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta h2{
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  max-width: 640px;
}

/* -------------------- Contact -------------------- */
.contact-grid{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  margin-top: 36px;
}
.contact-list li{
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 16px;
}
.contact-list li:first-child{ padding-top: 0; }
.contact-label{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  width: 110px;
  flex: none;
}
.contact-list a{ font-weight: 600; transition: color var(--transition); }
.contact-list a:hover{ color: var(--color-green); }

.social-block .contact-label{ display: block; margin-bottom: 14px; width: auto; }
.social-list{ display: flex; gap: 12px; }
.social-list a{
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background var(--transition);
}
.social-list svg{ width: 19px; height: 19px; }
.social-list a:hover{ border-color: var(--color-green); background: var(--color-surface-2); }

/* -------------------- Footer -------------------- */
.site-footer{
  padding: 28px 0;
  border-top: 1px solid var(--color-border);
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13.5px;
  color: var(--color-text-muted);
}

/* -------------------- WhatsApp floating button -------------------- */
.whatsapp-float{
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-green), var(--color-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #04110a;
  box-shadow: 0 8px 24px rgba(0,0,0,0.45);
  z-index: 150;
  transition: transform var(--transition);
}
.whatsapp-float:hover{ transform: scale(1.07); }
.whatsapp-float svg{ width: 27px; height: 27px; }

/* -------------------- Scroll reveal -------------------- */
.reveal{ opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 1024px){
  .grid-services{ grid-template-columns: repeat(2, 1fr); }
  .grid-solutions{ grid-template-columns: repeat(2, 1fr); }
  .product-grid{ grid-template-columns: repeat(2, 1fr); }
  .hero-ring{ width: 480px; height: 480px; right: -180px; }
  .contact-grid{ grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 760px){
  .main-nav{
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.98);
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .main-nav.is-open{ max-height: 400px; }
  .main-nav ul{
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 20px;
  }
  .main-nav a{ display: block; padding: 12px 0; border-bottom: 1px solid var(--color-border); }
  .nav-toggle{ display: flex; }
  .btn-whatsapp span{ display: none; }
  .btn-whatsapp{ padding: 9px; border-radius: 50%; width: 40px; height: 40px; }
  .btn-whatsapp .icon{ width: 20px; height: 20px; }

  .hero{ padding: 56px 0 60px; }
  .hero-ring{ width: 340px; height: 340px; right: -140px; top: 30%; opacity: 0.4; }
  .hero-actions .btn{ width: 100%; }
  .hero-actions{ flex-direction: column; }

  .section{ padding: 56px 0; }
  .grid-services{ grid-template-columns: 1fr; }
  .grid-solutions{ grid-template-columns: 1fr; }
  .product-grid{ grid-template-columns: 1fr 1fr; }

  .cta-inner{ flex-direction: column; align-items: flex-start; }
  .footer-inner{ flex-direction: column; }
}