/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #ffffff;
  --ink:       #0a0a0a;
  --ink-soft:  #2a2a2a;
  --ink-mute:  #6b6b6b;
  --accent:    #ff4b12;   /* señal: acción, urgencia, oficio */
  --accent-ink: #ffffff;
  --line:      #0a0a0a;
  --line-soft: rgba(10,10,10,0.14);
  --paper:     #f5f4f1;

  --display: "Archivo Black", "Archivo", "Helvetica Neue", Arial, sans-serif;
  --sans:    "Archivo", "Helvetica Neue", Arial, sans-serif;
  --mono:    "JetBrains Mono", "IBM Plex Mono", monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --nav-h: 76px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.05; letter-spacing: -0.01em; }
ul, ol { list-style: none; padding: 0; }
::selection { background: var(--ink); color: var(--bg); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; font-weight: 600; font-family: var(--mono); font-size: .85rem;
}
.skip-link:focus { top: 1rem; }

.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

.kicker {
  font-family: var(--mono);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { transition-duration: .01s; }
}

/* =============================================================
   4. Typography
   ============================================================= */
.section-title {
  font-family: var(--display);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.08;
  margin-bottom: 1rem;
}
.section-sub {
  color: var(--ink-mute);
  max-width: 42ch;
  font-size: 1rem;
}

/* =============================================================
   5. Components
   ============================================================= */

/* --- Grid --- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1px;
  background: var(--line);
  max-width: 1400px;
  margin-inline: auto;
}
.grid-12 > * {
  background: var(--bg);
  padding: clamp(2rem, 5vw, 4rem) var(--gutter);
}
.col-span-4  { grid-column: span 12; }
.col-span-5  { grid-column: span 12; }
.col-span-7  { grid-column: span 12; }
.col-span-8  { grid-column: span 12; }
@media (min-width: 960px) {
  .col-span-4 { grid-column: span 4; }
  .col-span-5 { grid-column: span 5; }
  .col-span-7 { grid-column: span 7; }
  .col-span-8 { grid-column: span 8; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .95rem 1.6rem;
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid var(--ink);
  transition: background .15s linear, color .15s linear, border-color .15s linear;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  background: var(--ink);
  color: var(--bg);
}
.btn-block { width: 100%; padding-block: 1.1rem; }

/* =============================================================
   6. Header / Nav
   ============================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: 1400px;
  margin-inline: auto;
  height: var(--nav-h);
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--display);
  font-size: 1.3rem;
  letter-spacing: -0.01em;
}
.logo-dot { color: var(--accent); }

.main-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}
.main-nav a:not(.nav-cta) {
  font-size: .95rem;
  font-weight: 500;
  padding-block: .3rem;
  border-bottom: 1px solid transparent;
  transition: border-color .15s var(--ease-out);
}
.main-nav a:not(.nav-cta):hover {
  border-color: var(--ink);
}
.nav-cta {
  font-family: var(--mono);
  font-size: .82rem;
  font-weight: 600;
  padding: .6rem 1rem;
  border: 1px solid var(--ink);
  transition: background .15s linear, color .15s linear;
}
.nav-cta:hover, .nav-cta:focus-visible {
  background: var(--ink);
  color: var(--bg);
}
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  transition: transform .2s var(--ease-out), opacity .2s var(--ease-out);
}
.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); }

@media (min-width: 860px) {
  .main-nav { display: flex; }
  .nav-toggle { display: none; }
}

@media (max-width: 859px) {
  .main-nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 1rem var(--gutter) 1.5rem;
  }
  .main-nav.is-open a:not(.nav-cta) {
    width: 100%;
    padding-block: .8rem;
    border-bottom: 1px solid var(--line-soft);
  }
  .main-nav.is-open .nav-cta {
    margin-top: 1rem;
  }
}

/* =============================================================
   7. Sections
   ============================================================= */

/* --- Hero --- */
.hero-title {
  font-family: var(--display);
  font-size: clamp(2.2rem, 6.2vw, 4.4rem);
  line-height: 0.98;
  max-width: 16ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}
.hero-lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin-bottom: 2rem;
}
.hero-facts {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.hero-facts li {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  font-size: .95rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
  padding-top: 1.1rem;
}
.fact-num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  min-width: 2.4ch;
}

/* --- Problema --- */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}
@media (min-width: 640px) {
  .problem-grid { grid-template-columns: 1fr 1fr; }
}
.problem-item {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line-soft);
}
@media (min-width: 640px) {
  .problem-item:nth-child(odd) { padding-right: 2rem; border-right: 1px solid var(--line-soft); }
  .problem-item:nth-child(even) { padding-left: 2rem; }
}
.problem-mark {
  display: inline-block;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--ink-mute);
  margin-bottom: .6rem;
}
.problem-item h3 {
  font-size: 1.1rem;
  margin-bottom: .5rem;
}
.problem-item p {
  color: var(--ink-mute);
  font-size: .95rem;
}

/* --- Servicios --- */
.service-block {
  border-top: 1px solid var(--line);
  padding-top: 2rem;
  margin-top: 2rem;
}
.service-block:first-child { margin-top: 0; }
.service-head {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}
.service-index {
  font-family: var(--display);
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
}
.service-head h3 {
  font-size: 1.3rem;
  margin-bottom: .3rem;
}
.service-note {
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 500;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.service-head > div > p {
  color: var(--ink-mute);
  font-size: .95rem;
  max-width: 48ch;
}

.tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
}
@media (min-width: 640px) {
  .tier-grid { grid-template-columns: repeat(3, 1fr); }
}
.tier-card {
  background: var(--paper);
  padding: 1.5rem;
  position: relative;
}
.tier-card h4 {
  font-size: 1.05rem;
  margin-bottom: .3rem;
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}
.tier-card p {
  font-size: .9rem;
  color: var(--ink-mute);
}
.tier-eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--ink-mute) !important;
  margin-bottom: .5rem;
}
.tier-badge {
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent);
  padding: .15rem .4rem;
  text-transform: uppercase;
}
.tier-recommended {
  background: var(--ink);
  color: var(--bg);
}
.tier-recommended h4,
.tier-recommended p { color: var(--bg); }
.tier-flag {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--accent-ink);
  padding: .3rem .6rem;
}

/* --- Cómo trabajo --- */
.process-list {
  border-top: 1px solid var(--line);
}
.process-step {
  display: flex;
  gap: 1.5rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.process-num {
  font-family: var(--display);
  font-size: 1.8rem;
  color: var(--ink-mute);
  min-width: 2.4ch;
  line-height: 1;
}
.process-body h3 {
  font-size: 1.15rem;
  margin-bottom: .4rem;
}
.process-body p {
  color: var(--ink-mute);
  font-size: .95rem;
  max-width: 52ch;
  margin-bottom: .6rem;
}
.process-time {
  display: inline-block;
  font-family: var(--mono);
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
}

/* --- Proyectos / Demo --- */
.featured-project {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
  margin-bottom: 2.5rem;
  text-decoration: none;
  color: inherit;
}
@media (min-width: 720px) {
  .featured-project { grid-template-columns: 1.2fr 1fr; }
}
.featured-visual { aspect-ratio: 16 / 10; overflow: hidden; background: var(--paper); }
.featured-visual img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s var(--ease-out);
}
.featured-project:hover .featured-visual img { transform: scale(1.03); }
.featured-meta { padding: clamp(1.5rem, 3vw, 2rem); display: flex; flex-direction: column; justify-content: center; }
.featured-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--ink);
  padding: .3rem .6rem;
  margin-bottom: .9rem;
  width: fit-content;
}
.featured-meta h3 { font-size: 1.25rem; margin-bottom: .6rem; }
.featured-meta p:not(.demo-tag) { color: var(--ink-mute); font-size: .92rem; margin-bottom: 1.1rem; }

.demo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--line);
}
@media (min-width: 1180px) {
  .demo-grid { grid-template-columns: repeat(3, 1fr); }
}
.demo-card { background: var(--bg); }
.demo-visual {
  aspect-ratio: 4 / 3;
  background: var(--paper);
  position: relative;
  overflow: hidden;
  display: block;
}
.demo-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.02);
  transition: transform .5s var(--ease-out), filter .5s var(--ease-out);
}
.demo-card:hover .demo-visual img {
  transform: scale(1.04);
  filter: grayscale(0) contrast(1.05);
}
.demo-visual-flag {
  position: absolute;
  top: .75rem;
  right: .75rem;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--bg);
  background: rgba(10,10,10,0.72);
  padding: .3rem .55rem;
}
.demo-meta { padding: 1.5rem; }
.demo-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: .25rem .5rem;
  margin-bottom: .9rem;
}
.demo-tag {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: .3rem;
}
.demo-card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.demo-card p:not(.demo-tag) { color: var(--ink-mute); font-size: .9rem; }
.demo-link {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
}
.demo-link:hover { color: var(--accent); border-color: var(--accent); }

/* --- CTA / Lead form --- */
.section-cta { background: var(--paper); }
.section-cta .grid-12 > * { background: var(--paper); }
.cta-facts {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  margin-top: 1.5rem;
}
.cta-facts li {
  font-size: .9rem;
  color: var(--ink-soft);
  padding-left: 1.2rem;
  position: relative;
}
.cta-facts li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}
.form-row label {
  font-family: var(--mono);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--ink-mute);
}
.form-row input,
.form-row select {
  font: inherit;
  font-size: 1rem;
  padding: .85rem 1rem;
  border: 1px solid var(--ink);
  background: var(--bg);
  color: var(--ink);
  border-radius: 0;
  appearance: none;
}
.form-row select {
  background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position: calc(100% - 20px) center, calc(100% - 15px) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
.form-row input:focus,
.form-row select:focus {
  outline: 3px solid var(--accent);
  outline-offset: 1px;
}
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px; overflow: hidden;
}
.form-note {
  font-size: .85rem;
  color: var(--ink-mute);
  min-height: 1.2em;
}
.form-note.is-success { color: #1a7a3c; font-weight: 600; }
.form-note.is-error { color: var(--accent); font-weight: 600; }

/* =============================================================
   8. Footer
   ============================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 3rem 2rem;
}
.site-footer .grid-12 {
  background: transparent;
}
.site-footer .grid-12 > * {
  background: transparent;
  padding: 0 var(--gutter) 1.5rem;
}
.footer-brand {
  font-family: var(--display);
  font-size: 1.3rem;
  margin-bottom: .6rem;
}
.footer-tagline { color: var(--ink-mute); font-size: .9rem; max-width: 32ch; }
.footer-label {
  font-family: var(--mono);
  font-size: .72rem;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: .6rem;
}
.footer-contact { display: flex; flex-direction: column; gap: .4rem; }
.footer-contact a { font-size: .95rem; border-bottom: 1px solid transparent; width: fit-content; }
.footer-contact a:hover { border-color: var(--ink); }
.footer-legal p { font-size: .9rem; color: var(--ink-mute); margin-bottom: .4rem; }
.footer-copy { font-family: var(--mono); font-size: .75rem; }
.footer-credits { font-size: .75rem !important; }
.footer-credits a { border-bottom: 1px solid var(--line-soft); }
.footer-credits a:hover { border-color: var(--ink); }

/* =============================================================
   9. Chat widget (asistente de IA)
   ============================================================= */
.chat-widget {
  position: fixed;
  right: clamp(1rem, 3vw, 1.75rem);
  bottom: clamp(1rem, 3vw, 1.75rem);
  z-index: 200;
}
.chat-toggle {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .9rem 1.3rem;
  background: var(--ink);
  color: var(--bg);
  font-weight: 600;
  font-size: .9rem;
  border: 1px solid var(--ink);
  box-shadow: 0 8px 24px rgba(10,10,10,0.22);
  transition: background .15s linear;
}
.chat-toggle:hover, .chat-toggle:focus-visible { background: var(--accent); border-color: var(--accent); }
.chat-toggle-close { display: none; font-family: var(--mono); }
.chat-widget.is-open .chat-toggle-open { display: none; }
.chat-widget.is-open .chat-toggle-close { display: inline; }

.chat-panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + .75rem);
  width: min(360px, calc(100vw - 2rem));
  max-height: min(520px, 70vh);
  background: var(--bg);
  border: 1px solid var(--ink);
  box-shadow: 0 20px 48px rgba(10,10,10,0.28);
  display: flex;
  flex-direction: column;
}
.chat-panel[hidden] { display: none; }
.chat-panel-head {
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
}
.chat-panel-head p {
  font-family: var(--display);
  font-size: 1.05rem;
}
.chat-panel-sub {
  display: block;
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: .03em;
  margin-top: .3rem;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .75rem;
  min-height: 160px;
}
.chat-msg {
  font-size: .9rem;
  line-height: 1.5;
  max-width: 88%;
  padding: .6rem .8rem;
}
.chat-msg--bot {
  align-self: flex-start;
  background: var(--paper);
  border: 1px solid var(--line-soft);
}
.chat-msg--user {
  align-self: flex-end;
  background: var(--ink);
  color: var(--bg);
}
.chat-msg--pending { color: var(--ink-mute); font-style: italic; }
.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 0 1.1rem .9rem;
}
.chat-suggestions[hidden] { display: none; }
.chat-suggestion {
  font-family: var(--mono);
  font-size: .72rem;
  padding: .4rem .65rem;
  border: 1px solid var(--line-soft);
  color: var(--ink-soft);
  transition: border-color .15s var(--ease-out), color .15s var(--ease-out);
}
.chat-suggestion:hover { border-color: var(--ink); color: var(--ink); }
.chat-form {
  display: flex;
  border-top: 1px solid var(--line);
}
.chat-form input {
  flex: 1;
  font: inherit;
  font-size: .9rem;
  padding: .9rem 1.1rem;
  border: 0;
  background: transparent;
  color: var(--ink);
}
.chat-form input:focus { outline: none; }
.chat-form button {
  padding: 0 1.2rem;
  font-size: 1.1rem;
  font-weight: 700;
  border-left: 1px solid var(--line);
  transition: background .15s linear, color .15s linear;
}
.chat-form button:hover { background: var(--ink); color: var(--bg); }

@media (max-width: 480px) {
  .chat-panel { width: calc(100vw - 2rem); }
}

/* =============================================================
   10. Reduced motion — only the truly intrusive
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}