/* ==========================================================================
   ENFOQUE STUDIO — hoja de estilos estática (sin build, lista para hosting
   compartido). Traduce el mismo sistema de diseño de la versión Next.js
   (colores, tipografía, espaciados) a CSS plano.
   ========================================================================== */

:root {
  --ink: #000000;
  --paper: #ffffff;
  --signal: #00c892;
  --signal-10: rgba(0, 200, 146, 0.1);
  --signal-06: rgba(0, 200, 146, 0.06);

  --g50: #f5f6f6;
  --g100: #e9ebeb;
  --g200: #cbcfcf;
  --g300: #a6abab;
  --g400: #7a8080;
  --g500: #565c5c;
  --g600: #3a3f3f;
  --g700: #262a2a;
  --g800: #161818;
  --g900: #0a0b0b;
  --g950: #050606;

  --font-display: "Anton", "Arial Narrow", sans-serif;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1440px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--ink);
  color: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
ul, ol { list-style: none; padding: 0; }
h1, h2, h3, h4 { font-weight: 400; }

::selection { background-color: var(--signal); color: var(--ink); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--g700); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--signal); }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}
@media (min-width: 640px) { .container { padding-inline: 2rem; } }
@media (min-width: 1024px) { .container { padding-inline: 3rem; } }

.section { padding-block: 6rem; }
@media (min-width: 640px) { .section { padding-block: 8rem; } }
.section--tight { padding-block: 6rem 6rem; }

.bg-ink { background: var(--ink); color: var(--paper); }
.bg-paper { background: var(--paper); color: var(--ink); }
.bg-graphite { background: var(--g950); color: var(--paper); }
.bg-signal { background: var(--signal); color: var(--ink); }

.text-signal { color: var(--signal); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 1rem; left: 1rem; z-index: 100;
  background: var(--signal); color: var(--ink); padding: 0.75rem 1.25rem;
  border-radius: 999px; transform: translateY(-150%); transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- Typography ---------- */
.eyebrow {
  display: flex; align-items: center; gap: 0.75rem;
  font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.28em; color: var(--signal); margin-bottom: 1rem;
}
.eyebrow--muted { color: var(--g500); }
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px; background: var(--signal);
  animation: pulseDot 2.4s ease-in-out infinite;
}

.h-hero {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 6.5vw + 1rem, 8rem);
  line-height: 0.94;
  letter-spacing: -0.045em;
}
.h2 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 4vw + 0.5rem, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}
.h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2vw + 0.5rem, 2.5rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
}
.lead {
  font-size: clamp(1.05rem, 0.8vw + 0.85rem, 1.375rem);
  line-height: 1.6;
  color: var(--g400);
  max-width: 42rem;
}
.lead--light { color: var(--g300); }
.section-head { max-width: 48rem; margin-bottom: 4rem; }
.section-head.center { margin-inline: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  border-radius: 999px; font-weight: 600; font-size: 0.9rem; letter-spacing: 0.01em;
  padding: 0.9rem 1.6rem; transition: all .3s var(--ease); cursor: pointer; border: none;
}
.btn-primary { background: var(--signal); color: var(--ink); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px -12px rgba(0,200,146,.45), 0 0 0 1px rgba(0,200,146,.35); }
.btn-outline { border: 1px solid rgba(166,171,171,.4); background: transparent; }
.btn-outline:hover { border-color: var(--signal); color: var(--signal); }
.btn-outline-ink { border: 1px solid var(--ink); color: var(--ink); background: transparent; }
.btn-outline-ink:hover { background: var(--ink); color: var(--signal); }
.btn-ghost { background: none; padding: 0; color: var(--signal); font-weight: 600; }
.btn-ghost svg { transition: transform .25s var(--ease); }
.btn-ghost:hover svg { transform: translateX(3px); }
.btn-block { width: 100%; }
@media (min-width: 640px) { .btn-block { width: auto; } }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset-inline: 0; top: 0; z-index: 50;
  background: transparent; border-bottom: 1px solid transparent;
  transition: all .4s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(0,0,0,.9); backdrop-filter: blur(10px);
  border-bottom-color: var(--g800);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }

.logo { display: inline-flex; align-items: center; gap: 3px; }
.logo .word { font-family: var(--font-display); font-size: 1.35rem; color: var(--paper); }
.logo .bar { width: 6px; align-self: stretch; border-radius: 999px; background: var(--paper); }

.nav-desktop { display: none; align-items: center; gap: 2.25rem; }
.nav-desktop a { font-size: 0.9rem; color: var(--g200); transition: color .2s; }
.nav-desktop a:hover { color: var(--paper); }
@media (min-width: 1024px) { .nav-desktop { display: flex; } .header-cta { display: block; } .nav-toggle { display: none; } }
.header-cta { display: none; }

.nav-toggle {
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  background: none; border: none; color: var(--paper); position: relative;
}
.nav-toggle span {
  position: absolute; left: 9px; width: 22px; height: 1.5px; background: currentColor;
  transition: all .3s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

.nav-mobile {
  display: none; flex-direction: column; gap: 0.25rem; padding-bottom: 2rem;
  border-top: 1px solid var(--g800);
}
.nav-mobile.is-open { display: flex; }
.nav-mobile a {
  padding: 1rem 0; border-bottom: 1px solid var(--g800);
  font-family: var(--font-display); font-size: 1.5rem; color: var(--paper);
}
.nav-mobile .btn { margin-top: 1.5rem; }
@media (min-width: 1024px) { .nav-mobile { display: none !important; } }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden; padding-top: 10rem; padding-bottom: 5rem;
  background:
    linear-gradient(to right, rgba(255,255,255,.03) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(to bottom, rgba(255,255,255,.03) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--ink);
}
@media (min-width: 640px) { .hero { padding-top: 12rem; } }
.hero::before {
  content: ""; position: absolute; top: -10rem; right: -10%; width: 520px; height: 520px;
  border-radius: 999px; background: var(--signal-10); filter: blur(120px); pointer-events: none;
}
.hero h1 { max-width: 60rem; }
.hero h1 span { display: block; }
.hero .lead { margin-top: 2rem; }
.hero .actions { margin-top: 2.5rem; display: flex; flex-direction: column; gap: 1rem; }
@media (min-width: 640px) { .hero .actions { flex-direction: row; } }

.hero-diagram-card {
  margin-top: 5rem; border-radius: 28px; border: 1px solid var(--g800);
  background: rgba(5,6,6,.6); padding: 1rem;
}
@media (min-width: 640px) { .hero-diagram-card { padding: 2rem; margin-top: 7rem; } }
.hero-diagram-card p {
  font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase;
  letter-spacing: 0.28em; color: var(--g500); margin-bottom: 1.5rem;
}

/* system diagram animation */
.diagram-edge { animation: flowDash 5s linear infinite; }
.diagram-dot { animation: pulseDot 2.4s ease-in-out infinite; transform-origin: center; }
@keyframes flowDash { to { stroke-dashoffset: -200; } }
@keyframes pulseDot {
  0%, 100% { opacity: .35; transform: scale(.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* ---------- Reveal (scroll) ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Problem ---------- */
.pain-grid { margin-top: 4rem; display: grid; gap: 0 2rem; }
@media (min-width: 640px) { .pain-grid { grid-template-columns: 1fr 1fr; } }
.pain-item { display: flex; gap: 1rem; padding-block: 1.25rem; border-bottom: 1px solid var(--g800); }
.pain-item .n { font-family: var(--font-mono); font-size: 0.75rem; color: var(--g600); margin-top: 0.2rem; }
.pain-item p { font-size: 1.05rem; color: var(--g200); }
.pain-note { padding-block: 1.25rem; display: flex; align-items: center; font-style: italic; color: var(--g500); }

/* ---------- Solution ---------- */
.solution-grid { display: grid; gap: 4rem; align-items: center; }
@media (min-width: 1024px) { .solution-grid { grid-template-columns: 1.1fr 0.9fr; gap: 3rem; } }
.pillars-card { border-radius: 28px; border: 1px solid var(--g200); background: var(--g50); padding: 2rem; }
@media (min-width: 640px) { .pillars-card { padding: 2.5rem; } }
.pillar { position: relative; display: flex; align-items: center; gap: 1.25rem; padding-block: 1.25rem; }
.pillar .num {
  width: 36px; height: 36px; flex-shrink: 0; border-radius: 999px; border: 1px solid var(--signal);
  display: flex; align-items: center; justify-content: center; font-family: var(--font-mono);
  font-size: 0.75rem; color: var(--signal);
}
.pillar .label { font-family: var(--font-display); font-size: 1.6rem; }
.pillar-connector { position: absolute; left: 17px; top: 52px; height: calc(100% - 30px); width: 1px; background: linear-gradient(to bottom, rgba(0,200,146,.6), transparent); }
.pillars-card .note { margin-top: 0.5rem; padding-top: 1.5rem; border-top: 1px solid var(--g200); font-size: 0.9rem; color: var(--g500); }

/* ---------- Services ---------- */
.service-list { margin-top: 4rem; display: flex; flex-direction: column; border-block: 1px solid var(--g800); }
.service { display: grid; gap: 2rem; padding-block: 3rem; border-bottom: 1px solid var(--g800); }
.service:last-child { border-bottom: none; }
@media (min-width: 1024px) { .service { grid-template-columns: 120px 1fr 1fr; gap: 2.5rem; align-items: start; } }
.service .idx { display: flex; align-items: center; gap: 1rem; }
@media (min-width: 1024px) { .service .idx { display: block; } }
.service .idx .n { font-family: var(--font-display); font-size: 2.25rem; color: var(--g700); }
.service .idx .label { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--signal); }
@media (min-width: 1024px) { .service .idx .label { display: block; margin-top: 0.75rem; } }
.service .body { max-width: 32rem; }
.service .body h3 { margin-bottom: 1rem; }
.service .body p { color: var(--g300); font-size: 1.05rem; line-height: 1.6; }
.service .body .btn-ghost { margin-top: 1.5rem; }
.service .tags { display: flex; flex-wrap: wrap; gap: 0.5rem; align-content: flex-start; }
@media (min-width: 1024px) { .service .tags { justify-content: flex-end; } }
.tag { border: 1px solid var(--g700); border-radius: 999px; padding: 0.4rem 0.9rem; font-size: 0.75rem; color: var(--g300); }
.tag--light { border-color: var(--g200); color: var(--g500); }

/* ---------- Process ---------- */
.process-grid { position: relative; margin-top: 4rem; display: grid; gap: 2.5rem; }
@media (min-width: 1024px) { .process-grid { grid-template-columns: repeat(4, 1fr); gap: 1.5rem; margin-top: 6rem; } }
.process-line { display: none; }
@media (min-width: 1024px) { .process-line { display: block; position: absolute; left: 0; right: 0; top: 26px; height: 1px; background: var(--g200); } }
.process-step .top { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }
@media (min-width: 1024px) { .process-step .top { display: block; margin-bottom: 2rem; } }
.process-step .circle {
  position: relative; z-index: 1; flex-shrink: 0; width: 52px; height: 52px; border-radius: 999px;
  background: var(--ink); color: var(--paper); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.1rem;
}
.process-step .rule { height: 1px; flex: 1; background: var(--g200); }
@media (min-width: 1024px) { .process-step .rule { display: none; } }
.process-step h3 { font-size: 1.5rem; }
.process-step p { margin-top: 0.75rem; font-size: 0.95rem; color: var(--g500); }

/* ---------- Differentiator ---------- */
.diff-grid { max-width: 56rem; margin: 4rem auto 0; display: grid; gap: 1.5rem; }
@media (min-width: 640px) { .diff-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
.diff-card { height: 100%; border-radius: 24px; padding: 2rem; }
@media (min-width: 640px) { .diff-card { padding: 2.5rem; } }
.diff-card--muted { border: 1px solid var(--g800); }
.diff-card--signal { border: 1px solid var(--signal); background: var(--signal-06); }
.diff-card .label { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.28em; }
.diff-card--muted .label { color: var(--g500); }
.diff-card--signal .label { color: var(--signal); }
.diff-card ul { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
.diff-card li { display: flex; align-items: center; gap: 0.75rem; color: var(--g400); }
.diff-card li .rule { width: 16px; height: 1px; background: var(--g600); }
.diff-card li span.txt { text-decoration: line-through; text-decoration-color: var(--g600); }
.diff-card--signal p { margin-top: 1.5rem; font-size: 1.15rem; line-height: 1.6; }

/* ---------- Projects ---------- */
.project-list { margin-top: 4rem; display: flex; flex-direction: column; gap: 1.5rem; }
.project {
  display: grid; gap: 2rem; border-radius: 28px; border: 1px solid var(--g200); padding: 2rem;
  transition: border-color .3s;
}
.project:hover { border-color: var(--signal); }
@media (min-width: 640px) { .project { padding: 2.5rem; } }
@media (min-width: 1024px) { .project { grid-template-columns: 200px 1fr; gap: 3rem; } }
.project .idx { font-family: var(--font-display); font-size: 3rem; color: var(--g200); }
.project .category { margin-top: 0.75rem; font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--signal); }
.project .client { margin-top: 0.5rem; font-family: var(--font-display); font-size: 1.3rem; }
.project .stack { margin-top: 1.5rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.project-details { display: grid; gap: 1.5rem; }
@media (min-width: 640px) { .project-details { grid-template-columns: repeat(3, 1fr); } }
.project-details .label { font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--g400); }
.project-details p.txt { margin-top: 0.75rem; font-size: 0.95rem; line-height: 1.6; color: var(--g600); }

/* ---------- Impact ---------- */
.impact { text-align: center; padding-block: 7rem; }
@media (min-width: 640px) { .impact { padding-block: 10rem; } }
.impact h2 span { display: block; }
.impact h2 span:last-child { color: var(--signal); }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden;
  background:
    linear-gradient(to right, rgba(0,0,0,.06) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(to bottom, rgba(0,0,0,.06) 1px, transparent 1px) 0 0 / 56px 56px,
    var(--signal);
  color: var(--ink);
}
.cta .container { max-width: 48rem; text-align: center; }
.cta .lead { margin-inline: auto; color: rgba(0,0,0,.8); }
.cta .actions { margin-top: 2.5rem; }

/* ---------- Form ---------- */
.form-section { max-width: 48rem; }
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; color: var(--g500); }
.field input, .field select, .field textarea {
  width: 100%; border-radius: 12px; border: 1px solid var(--g300); background: var(--paper);
  padding: 0.9rem 1rem; font-size: 0.9rem; color: var(--ink); transition: border-color .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--signal); outline: none; }
.field textarea { resize: none; }
form.contact-form { margin-top: 4rem; display: grid; gap: 1.25rem; }
.form-row { display: grid; gap: 1.25rem; }
@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-success {
  margin-top: 4rem; border-radius: 24px; border: 1px solid var(--signal);
  background: var(--signal-06); padding: 2.5rem; text-align: center;
}
.form-success h3 { font-family: var(--font-display); font-size: 1.5rem; }
.form-success p { margin-top: 0.75rem; color: var(--g600); }
.form-error { font-size: 0.85rem; color: #b91c1c; }
.hp-field { position: absolute; left: -9999px; opacity: 0; }
[hidden] { display: none !important; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--g800); background: var(--ink); }
.footer-grid { display: grid; gap: 3.5rem; padding-block: 4rem; }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 2rem; padding-block: 5rem; } }
.footer-brand { max-width: 24rem; }
.footer-brand .tagline { margin-top: 0.4rem; font-family: var(--font-sans); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--signal); }
.footer-brand p { margin-top: 1.5rem; font-size: 0.9rem; color: var(--g300); line-height: 1.6; }
.footer-col p.title { margin-bottom: 1.25rem; font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--g500); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a { font-size: 0.9rem; color: var(--g300); transition: color .2s; }
.footer-col a:hover { color: var(--signal); }
.footer-bottom {
  display: flex; flex-direction: column-reverse; gap: 1rem; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--g800); padding-block: 1.5rem; font-size: 0.75rem; color: var(--g500);
}
@media (min-width: 640px) { .footer-bottom { flex-direction: row; } }
.footer-bottom .made { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.28em; color: var(--g600); }

/* ---------- WhatsApp floating button ---------- */
.wa-button {
  position: fixed; bottom: 1.25rem; right: 1.25rem; z-index: 40;
  display: flex; align-items: center; gap: 0.75rem; border-radius: 999px;
  background: var(--signal); color: var(--ink); padding: 0.9rem;
  box-shadow: 0 12px 40px -12px rgba(0,200,146,.45), 0 0 0 1px rgba(0,200,146,.35);
  opacity: 0; transform: translateY(16px) scale(.9); pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease), padding .3s var(--ease);
}
.wa-button.is-visible { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
@media (min-width: 640px) { .wa-button { bottom: 2rem; right: 2rem; } }
.wa-button svg { width: 20px; height: 20px; flex-shrink: 0; }
.wa-button .txt {
  max-width: 0; overflow: hidden; white-space: nowrap; opacity: 0; font-weight: 600; font-size: 0.9rem;
  transition: all .3s var(--ease);
}
.wa-button:hover .txt, .wa-button:focus-visible .txt { max-width: 160px; opacity: 1; }
.wa-button:hover, .wa-button:focus-visible { padding-right: 1.25rem; }

/* ---------- Legal pages ---------- */
.legal { max-width: 42rem; padding-block: 8rem; }
.legal .kicker { font-family: var(--font-mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.28em; color: var(--signal); }
.legal h1 { margin-top: 1rem; font-family: var(--font-display); font-size: 2.5rem; }
@media (min-width: 640px) { .legal h1 { font-size: 3rem; } }
.legal .updated { margin-top: 1rem; font-size: 0.85rem; color: var(--g500); }
.legal section { margin-top: 2rem; }
.legal h2 { font-family: var(--font-display); font-size: 1.25rem; }
.legal p { margin-top: 0.75rem; line-height: 1.7; color: var(--g300); }
.legal a { color: var(--signal); text-decoration: underline; text-underline-offset: 4px; }
.legal .back { display: inline-block; margin-top: 3rem; }

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0 !important; }
.text-balance { text-wrap: balance; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .diagram-edge, .diagram-dot { animation: none !important; }
}