/* =========================================================
   Kuma Business Consulting — estilos
   Paleta y tipografía según Manual de Marca v1.1
   ========================================================= */

:root {
  /* Marca */
  --carbon: #22262A;
  --terracota: #C77859;
  --arena: #F0C7A5;
  --papel: #FCFAF6;
  --cobre: #9D4933;
  --gris: #626970;

  /* Semánticos */
  --bg: var(--papel);
  --surface: #F5EFE6;
  --text: var(--carbon);
  --text-muted: var(--gris);
  --action: var(--cobre);
  --action-hover: #863D2A;
  --on-dark: #FCFAF6;
  --on-dark-muted: rgba(252, 250, 246, 0.78);
  --line: rgba(34, 38, 42, 0.12);
  --line-dark: rgba(252, 250, 246, 0.22);
  --error: #A3321F;

  /* Tipografía */
  --font: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Source Code Pro", ui-monospace, "Cascadia Mono", monospace;
  --serif-jp: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;

  /* Espaciado (escala 4/8) */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px;

  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --container: 1200px;
  --gutter: clamp(16px, 4vw, 40px);

  /* Movimiento */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 160ms;
  --t-med: 320ms;
  --t-slow: 560ms;

  /* Capas */
  --z-rail: 20;
  --z-header: 40;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.12; letter-spacing: -0.02em; text-wrap: balance; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; touch-action: manipulation; }
svg { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

:focus-visible { outline: 3px solid var(--terracota); outline-offset: 3px; border-radius: 6px; }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--s-4); top: -100px; z-index: 100;
  background: var(--carbon); color: var(--on-dark); padding: var(--s-3) var(--s-4);
  border-radius: var(--radius-sm); text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: var(--s-4); }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-3);
  min-height: 52px; padding: 0 var(--s-5) 0 var(--s-6);
  border-radius: 999px; border: 1.5px solid transparent;
  font-weight: 700; font-size: 1rem; text-decoration: none;
  transition: background-color var(--t-fast) var(--ease-out), transform var(--t-fast) var(--ease-out);
}
.btn svg { font-size: 1.2rem; transition: transform var(--t-med) var(--ease-out); }
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--action); color: var(--on-dark); }
.btn--primary:hover { background: var(--action-hover); }
.btn[disabled] { opacity: 0.6; cursor: progress; }

/* =========================================================
   NAV (barra color papel)
   ========================================================= */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: var(--z-header);
  padding: var(--s-4) var(--gutter);
  pointer-events: none;
}
.nav {
  pointer-events: auto;
  max-width: 1320px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: var(--s-4);
  padding: var(--s-2) var(--s-2) var(--s-2) var(--s-5);
  min-height: 72px;
  border-radius: 999px;
  background: var(--papel);
  border: 1px solid rgba(34, 38, 42, 0.06);
  box-shadow: 0 10px 30px rgba(34, 38, 42, 0.14);
  color: var(--carbon);
  transition: box-shadow var(--t-med) var(--ease-out);
}
.site-header.is-scrolled .nav { box-shadow: 0 10px 34px rgba(34, 38, 42, 0.2); }
.nav__symbol { justify-self: start; border-radius: 12px; }.nav__symbol img { height: 48px; width: auto; }
.nav__wordmark { display: flex; flex-direction: column; align-items: stretch; gap: 5px; text-decoration: none; }
.nav__wordmark img { height: 32px; width: auto; }
.nav__wordmark span {
  font-size: 11px; font-weight: 600; text-transform: uppercase; line-height: 1;
  letter-spacing: 0.34em; margin-right: -0.34em; text-align: center; white-space: nowrap; color: var(--carbon);
}
.nav__end { justify-self: end; display: flex; align-items: center; gap: var(--s-2); }

.nav__links { display: flex; gap: 2px; }
.nav__links a {
  display: block; padding: 12px 18px; border-radius: 999px;
  text-decoration: none; font-size: 0.9375rem; font-weight: 600;
  transition: background-color var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out);
}
.nav__links a:hover { background: var(--surface); }
.nav__links a.is-current { background: var(--carbon); color: var(--papel); }

.nav__menu {
  display: none; width: 52px; height: 52px; border-radius: 50%;
  border: 1px solid var(--line); background: transparent; place-items: center;
}
.nav__menu:hover { background: var(--surface); }
.nav__menu-grid { display: grid; grid-template-columns: repeat(3, 4px); gap: 4px; }
.nav__menu-grid i { width: 4px; height: 4px; border-radius: 50%; background: currentColor; }

.mobile-menu {
  pointer-events: auto;
  margin: var(--s-2) auto 0; max-width: 1320px;
  background: var(--papel); color: var(--carbon);
  border-radius: var(--radius-lg); padding: var(--s-4) var(--s-5) var(--s-5);
  box-shadow: 0 24px 60px rgba(34, 38, 42, 0.25);
  animation: menu-in var(--t-med) var(--ease-out);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu a { text-decoration: none; }
.mobile-menu ul a { display: block; padding: var(--s-4) var(--s-2); font-size: 1.375rem; font-weight: 700; border-bottom: 1px solid var(--line); }
.mobile-menu__mail { display: inline-block; margin-top: var(--s-4); padding: var(--s-2); color: var(--cobre); font-weight: 600; }
@keyframes menu-in { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* =========================================================
   RAIL (indicador lateral de secciones)
   ========================================================= */
.rail {
  position: fixed; left: clamp(16px, 2.4vw, 36px); top: 50%; transform: translateY(-50%);
  z-index: var(--z-rail);
  --rail-color: var(--on-dark);
}
.rail.on-light { --rail-color: var(--carbon); }
.rail ol { position: relative; display: flex; flex-direction: column; gap: 22px; align-items: center; }
.rail ol::before {
  content: ""; position: absolute; top: 6px; bottom: 6px; left: 50%; width: 1.5px; transform: translateX(-50%);
  background: var(--rail-color); opacity: 0.55;
}
.rail a { position: relative; display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; }
.rail a::before {
  content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--rail-color);
  transition: transform var(--t-med) var(--ease-out), background-color var(--t-med), box-shadow var(--t-med);
}
.rail a.is-current::before {
  background: var(--terracota);
  box-shadow: 0 0 0 5px var(--papel), 0 0 0 7px var(--terracota);
  transform: scale(1.3);
}
.rail a::after {
  content: attr(aria-label); position: absolute; left: 34px; white-space: nowrap;
  font-size: 0.8125rem; font-weight: 600; color: var(--rail-color);
  opacity: 0; transform: translateX(-4px); pointer-events: none;
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.rail a:hover::after, .rail a:focus-visible::after { opacity: 1; transform: none; }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative; isolation: isolate;
  min-height: 100vh; min-height: 100dvh;
  display: flex; flex-direction: column;
  color: var(--on-dark); overflow: hidden; background: var(--carbon);
}
.hero__bg, .hero__bg img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__bg { z-index: -2; }
/* El oso queda libre a la derecha; el contenido vive en la mitad izquierda */
.hero__bg img { object-fit: cover; object-position: 62% 40%; transform: scale(1.04); animation: hero-settle 1.8s var(--ease-out) forwards; }
@keyframes hero-settle { to { transform: scale(1); } }
.hero__shade {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(90deg, rgba(34, 38, 42, 0.88) 0%, rgba(34, 38, 42, 0.7) 34%, rgba(34, 38, 42, 0.15) 60%, rgba(34, 38, 42, 0) 100%),
    linear-gradient(0deg, rgba(34, 38, 42, 0.7) 0%, rgba(34, 38, 42, 0) 30%);
}

.hero__inner {
  flex: 1; width: 100%; max-width: 1320px; margin: 0 auto;
  padding: 136px var(--gutter) var(--s-6) calc(var(--gutter) + 64px);
  display: flex; flex-direction: column; justify-content: center;
}
.hero__inner > * { max-width: min(640px, 52vw); }
.hero__title {
  font-size: clamp(2.5rem, 4.4vw, 4.5rem);
  font-weight: 800; line-height: 1.02; letter-spacing: -0.035em;
}
.hero__lead { margin-top: var(--s-5); max-width: 34em; font-size: clamp(1.0625rem, 1.25vw, 1.1875rem); color: var(--on-dark-muted); }

/* Tarjetas de servicios: las cuatro visibles, debajo del texto */
.hero__cards { margin-top: clamp(28px, 4.5vh, 48px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.card {
  position: relative; display: block; aspect-ratio: 3 / 4;
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(252, 250, 246, 0.35);
  text-decoration: none; color: var(--on-dark);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
  transition: border-color var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out);
}
.card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow) var(--ease-out); }
.card::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(34, 38, 42, 0.9) 0%, rgba(34, 38, 42, 0.4) 42%, rgba(34, 38, 42, 0) 68%);
}
.card:hover { border-color: var(--arena); transform: translateY(-4px); }
.card:hover img { transform: scale(1.06); }
.card__label {
  position: absolute; z-index: 2; top: var(--s-3); left: var(--s-3); right: var(--s-3);
  font-size: 0.75rem; line-height: 1.35; color: var(--on-dark-muted);
}
.card__label b { display: block; font-size: 0.875rem; line-height: 1.25; color: var(--on-dark); font-weight: 700; margin-bottom: 2px; }

.hero__title, .hero__lead, .hero__cards li { opacity: 0; transform: translateY(16px); animation: rise var(--t-slow) var(--ease-out) forwards; }
.hero__lead { animation-delay: 100ms; }
.hero__cards li:nth-child(1) { animation-delay: 220ms; }
.hero__cards li:nth-child(2) { animation-delay: 280ms; }
.hero__cards li:nth-child(3) { animation-delay: 340ms; }
.hero__cards li:nth-child(4) { animation-delay: 400ms; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* Barra inferior */
.hero__bar {
  width: calc(100% - 2 * var(--gutter)); max-width: calc(1320px - 2 * var(--gutter));
  margin: 0 auto var(--s-5);
  display: flex; align-items: center;
  padding: var(--s-2) var(--s-5) var(--s-2) var(--s-2);
  border-radius: 999px; border: 1px solid var(--line-dark);
  background: rgba(34, 38, 42, 0.25);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.hero__scroll { display: inline-flex; align-items: center; gap: var(--s-3); font-size: 0.875rem; text-decoration: none; color: var(--on-dark-muted); padding-right: var(--s-2); border-radius: 999px; }
.hero__scroll:hover { color: var(--on-dark); }
.hero__scroll-icon { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-dark); display: grid; place-items: center; }
.hero__scroll-icon svg { animation: nudge 2.4s var(--ease-out) infinite; }
@keyframes nudge { 0%, 60%, 100% { transform: none; } 30% { transform: translateY(3px); } }

/* =========================================================
   SECCIONES
   ========================================================= */
.section { padding: clamp(80px, 11vw, 144px) 0; }
.section__head { max-width: 780px; }
.section h2 { font-size: clamp(2rem, 3.8vw, 3.25rem); font-weight: 800; }
.section__lead { margin-top: var(--s-5); font-size: 1.125rem; color: var(--text-muted); max-width: 40em; }
.section__lead--light { color: var(--on-dark-muted); }

/* ---------- Servicios ---------- */
.services .section__head { max-width: none; }
.svc__tabs {
  margin-top: var(--s-7);
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-2);
  padding: var(--s-2); border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--line);
}
.svc__tab {
  display: flex; align-items: center; gap: var(--s-3);
  min-height: 64px; padding: var(--s-2) var(--s-4) var(--s-2) var(--s-2);
  text-align: left; border-radius: var(--radius); border: 0; background: transparent;
  font-weight: 700; font-size: 1rem; line-height: 1.2;
  transition: background-color var(--t-med) var(--ease-out), color var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease-out);
}
.svc__tab:hover { background: rgba(255, 255, 255, 0.7); }
.svc__tab[aria-selected="true"] { background: var(--carbon); color: var(--papel); box-shadow: 0 8px 20px rgba(34, 38, 42, 0.18); }

/* Íconos animados */
.icon {
  width: 48px; height: 48px; flex-shrink: 0; border-radius: 14px;
  display: grid; place-items: center; font-size: 30px;
  background: var(--papel); color: var(--cobre);
  transition: background-color var(--t-med) var(--ease-out), color var(--t-med) var(--ease-out);
}
.icon svg { stroke-width: 2.6; }
.svc__tab[aria-selected="true"] .icon { background: var(--terracota); color: var(--papel); }
.icon * { animation-play-state: paused !important; }
.svc__tab[aria-selected="true"] .icon *, .svc__tab:hover .icon * { animation-play-state: running !important; }

.ic-line { stroke-dasharray: 44; stroke-dashoffset: 44; animation: draw 2.6s var(--ease-out) infinite; }
.icon--finanzas .ic-dot { fill: currentColor; animation: pop 2.6s var(--ease-out) infinite; transform-origin: 38px 14px; }
@keyframes draw { 0% { stroke-dashoffset: 44; } 55%, 100% { stroke-dashoffset: 0; } }
@keyframes pop { 0%, 45% { transform: scale(0); } 60% { transform: scale(1.4); } 75%, 100% { transform: scale(1); } }

.ic-link { stroke-dasharray: 4 4; animation: dash 1.6s linear infinite; }
.ic-node { fill: var(--papel); transform-box: fill-box; transform-origin: center; animation: pulse 2.4s var(--ease-out) infinite; }
.svc__tab[aria-selected="true"] .ic-node { fill: var(--terracota); }
.ic-node.n2 { animation-delay: 0.3s; } .ic-node.n3 { animation-delay: 0.6s; } .ic-node.n4 { animation-delay: 0.9s; }
@keyframes dash { to { stroke-dashoffset: -16; } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 30% { transform: scale(1.35); } }

.ic-gear { transform-origin: 20px 26px; animation: spin 6s linear infinite; }
.ic-spark { fill: currentColor; stroke: none; transform-box: fill-box; transform-origin: center; animation: twinkle 1.8s ease-in-out infinite; }
@keyframes twinkle { 0%, 100% { transform: scale(0.6); opacity: 0.5; } 50% { transform: scale(1.1); opacity: 1; } }

.ic-bar { stroke-width: 5; transform-box: fill-box; transform-origin: bottom; animation: grow 2.4s var(--ease-out) infinite; }
.ic-bar.b2 { animation-delay: 0.2s; } .ic-bar.b3 { animation-delay: 0.4s; }
@keyframes grow { 0% { transform: scaleY(0.2); } 40%, 100% { transform: scaleY(1); } }

@keyframes spin { to { transform: rotate(360deg); } }

/* Panel: imagen grande + texto */
.svc__panels { margin-top: var(--s-5); }
.svc__panel {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 4vw, 64px); align-items: center;
  padding: clamp(16px, 2vw, 24px); border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--line);
}
.svc__panel[hidden] { display: none; }
.svc__panel.is-entering .svc__media img { animation: img-in 0.7s var(--ease-out); }
.svc__panel.is-entering .svc__text > * { animation: rise-in 0.5s var(--ease-out) both; }
.svc__panel.is-entering .svc__text > :nth-child(2) { animation-delay: 50ms; }
.svc__panel.is-entering .svc__text > :nth-child(3) { animation-delay: 100ms; }
.svc__panel.is-entering .svc__text > :nth-child(4) { animation-delay: 150ms; }
.svc__panel.is-entering .svc__text > :nth-child(5) { animation-delay: 200ms; }
@keyframes img-in { from { opacity: 0; transform: scale(1.06); } to { opacity: 1; transform: none; } }
@keyframes rise-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.svc__media { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4 / 5; }
.svc__media img { width: 100%; height: 100%; object-fit: cover; }
.svc__text { padding: var(--s-4) clamp(0px, 2vw, 24px) var(--s-4) 0; }
.svc__text h3 { font-size: clamp(1.75rem, 2.8vw, 2.5rem); font-weight: 800; }
.svc__desc { margin-top: var(--s-4); color: var(--text-muted); font-size: 1.0625rem; max-width: 42em; }
.svc__label { margin-top: var(--s-6); font-size: 0.8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--cobre); }
.svc__list { margin-top: var(--s-2); display: grid; grid-template-columns: 1fr 1fr; column-gap: var(--s-6); }
.svc__list li { position: relative; padding: var(--s-3) 0 var(--s-3) var(--s-6); border-top: 1px solid var(--line); font-weight: 600; }
.svc__list li::before { content: ""; position: absolute; left: 2px; top: 50%; width: 14px; height: 2px; background: var(--terracota); }
.svc__result { margin-top: var(--s-5); padding: var(--s-4) var(--s-5); border-radius: var(--radius-sm); background: var(--papel); border-left: 3px solid var(--terracota); }
.svc__result b { color: var(--cobre); }

/* ---------- Enfoque ---------- */
.approach { background: var(--carbon); color: var(--on-dark); position: relative; overflow: hidden; }
.approach::after {
  content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%;
  right: -180px; top: -200px; background: var(--terracota); opacity: 0.12; pointer-events: none;
}
.approach__grid { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: clamp(40px, 6vw, 96px); align-items: center; position: relative; z-index: 1; }
.approach__media { border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 4 / 5; border: 1px solid var(--line-dark); }
.approach__media img { width: 100%; height: 100%; object-fit: cover; object-position: 60% 50%; }
.principles { margin-top: var(--s-7); display: grid; gap: var(--s-2); }
.principles li { display: grid; grid-template-columns: 72px 1fr; gap: var(--s-5); align-items: start; padding: var(--s-5) 0; border-top: 1px solid var(--line-dark); }
.principles__kanji { font-family: var(--serif-jp); font-size: 1.75rem; line-height: 1.1; color: var(--terracota); }
.principles h3 { font-size: 1.25rem; font-weight: 700; }
.principles h3 span { font-weight: 500; color: var(--arena); }
.principles p { margin-top: var(--s-2); color: var(--on-dark-muted); }

/* Flujo de trabajo */
.flow { position: relative; z-index: 1; margin-top: clamp(64px, 9vw, 120px); --node: 72px; }
.flow__title { font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 800; margin-bottom: var(--s-7); }
.flow__track {
  position: absolute; left: calc(12.5% ); right: calc(12.5%); height: 2px;
  top: calc(var(--flow-top, 0px) + var(--node) / 2);
  background: var(--line-dark);
}
.flow__fill { position: absolute; inset: 0; background: linear-gradient(90deg, var(--terracota), var(--arena)); transform-origin: left; transform: scaleX(0); transition: transform 1.6s var(--ease-out); }
.flow__spark {
  position: absolute; top: 50%; left: 0; width: 10px; height: 10px; margin: -5px 0 0 -5px; border-radius: 50%;
  background: var(--arena); box-shadow: 0 0 0 4px rgba(240, 199, 165, 0.25), 0 0 18px 4px rgba(240, 199, 165, 0.6);
  opacity: 0;
}
.flow.is-visible .flow__fill { transform: scaleX(1); }
.flow.is-running .flow__spark { animation: travel 4.5s linear infinite; }
@keyframes travel { 0% { left: 0; opacity: 0; } 10% { opacity: 1; } 90% { opacity: 1; } 100% { left: 100%; opacity: 0; } }

.flow__steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-5); }
.flow__step { text-align: center; padding: 0 var(--s-2); }
.flow__node {
  position: relative; width: var(--node); height: var(--node); margin: 0 auto; border-radius: 50%;
  display: grid; place-items: center; font-size: 28px;
  background: var(--carbon); color: var(--arena); border: 1.5px solid var(--line-dark);
  transform: scale(0.6); opacity: 0;
  transition: transform 0.6s var(--ease-out), opacity 0.6s var(--ease-out), background-color var(--t-med), color var(--t-med), border-color var(--t-med);
}
.flow__node::after {
  content: ""; position: absolute; inset: -8px; border-radius: 50%; border: 1px solid var(--terracota); opacity: 0;
}
.flow__step h4 { margin-top: var(--s-5); font-size: 1.25rem; font-weight: 700; }
.flow__step p { margin: var(--s-2) auto 0; max-width: 22ch; color: var(--on-dark-muted); font-size: 0.9375rem; }
.flow__step h4, .flow__step p { opacity: 0; transform: translateY(10px); transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out); }

.flow.is-visible .flow__node, .flow.is-visible .flow__step h4, .flow.is-visible .flow__step p { opacity: 1; transform: none; }
.flow.is-visible .flow__step:nth-child(1) * { transition-delay: 0.1s; }
.flow.is-visible .flow__step:nth-child(2) * { transition-delay: 0.5s; }
.flow.is-visible .flow__step:nth-child(3) * { transition-delay: 0.9s; }
.flow.is-visible .flow__step:nth-child(4) * { transition-delay: 1.3s; }
.flow__step:hover .flow__node, .flow__step.is-lit .flow__node { background: var(--terracota); color: var(--papel); border-color: var(--terracota); }
.flow__step.is-lit .flow__node::after { animation: ring 1.2s var(--ease-out); }
@keyframes ring { from { opacity: 0.9; transform: scale(0.9); } to { opacity: 0; transform: scale(1.35); } }

/* ---------- Nosotros ---------- */
.about__statement { max-width: 18ch; font-size: clamp(2.5rem, 5.4vw, 4.75rem) !important; line-height: 1.02; letter-spacing: -0.035em; }
.about__grid { margin-top: var(--s-8); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.about__lead { font-size: clamp(1.125rem, 1.5vw, 1.3125rem); line-height: 1.6; color: var(--text); }
.about__areas { margin: 0; display: grid; }
.about__areas div { display: grid; grid-template-columns: 140px 1fr; gap: var(--s-4); padding: var(--s-5) 0; border-top: 1px solid var(--line); }
.about__areas div:last-child { border-bottom: 1px solid var(--line); }
.about__areas dt { font-weight: 800; font-size: 1.125rem; color: var(--cobre); }
.about__areas dd { margin: 0; color: var(--text-muted); }

/* ---------- Contacto ---------- */
.contact { background: var(--surface); }
.contact__grid { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.contact__info { margin-top: var(--s-6); display: grid; gap: var(--s-3); }
.contact__info li { display: flex; align-items: center; gap: var(--s-3); font-weight: 600; font-size: 1.0625rem; }
.contact__info svg { font-size: 1.25rem; color: var(--cobre); }
.contact__info a { text-decoration-color: var(--terracota); text-underline-offset: 4px; }
.contact__info a:hover { color: var(--cobre); }

.form {
  background: var(--papel); border-radius: var(--radius-lg); padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-5) var(--s-4);
  box-shadow: 0 20px 50px rgba(34, 38, 42, 0.06);
}
.field { display: grid; gap: var(--s-2); align-content: start; }
.field--full, .form__summary { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: 0.9375rem; }
.field label span { color: var(--cobre); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 50px; padding: 12px 16px;
  border-radius: var(--radius-sm); border: 1.5px solid rgba(34, 38, 42, 0.22); background: #fff; font-size: 1rem;
  transition: border-color var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
}
.field textarea { resize: vertical; min-height: 140px; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: rgba(34, 38, 42, 0.4); }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--cobre); box-shadow: 0 0 0 3px rgba(199, 120, 89, 0.28); }
.field [aria-invalid="true"] { border-color: var(--error); }
.field__hint { font-size: 0.875rem; color: var(--text-muted); }
.field__error { font-size: 0.875rem; font-weight: 600; color: var(--error); }
.field__error:empty { display: none; }
.form__summary { padding: var(--s-4) var(--s-5); border-radius: var(--radius-sm); border: 1.5px solid var(--error); background: #FBEDE8; color: var(--error); }
.form__summary p { font-weight: 700; }
.form__summary ul { margin-top: var(--s-2); padding-left: var(--s-5); list-style: disc; }
.form__summary a { color: var(--error); font-weight: 600; }
.form__footer { display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); flex-wrap: wrap; }
.form__required { font-size: 0.875rem; color: var(--text-muted); }
.form__required span { color: var(--cobre); }
.form__status { font-weight: 600; }
.form__status:empty { display: none; }
.form__status.is-success { color: #2F6B45; }
.form__status.is-error { color: var(--error); }
.spinner { width: 18px; height: 18px; border-radius: 50%; border: 2px solid rgba(252, 250, 246, 0.35); border-top-color: var(--on-dark); animation: spin 0.8s linear infinite; }

/* ---------- Footer (color papel, logo original) ---------- */
.footer { background: var(--papel); color: var(--carbon); padding: var(--s-8) 0 var(--s-5); border-top: 1px solid var(--line); }
.footer__grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-5); padding-bottom: var(--s-6); border-bottom: 1px solid var(--line); }
.footer__logo { display: flex; flex-direction: column; align-items: center; gap: var(--s-2); text-decoration: none; border-radius: 12px; }
.footer__symbol { height: 110px; width: auto; }
.footer__wordmark { height: 40px; width: auto; }
.footer__links { display: flex; flex-wrap: wrap; gap: var(--s-1); }
.footer__links a { display: block; padding: 10px 14px; text-decoration: none; font-weight: 600; color: var(--text-muted); border-radius: 999px; }
.footer__links a:hover { color: var(--carbon); background: var(--surface); }
.footer__mail { color: var(--cobre); font-weight: 700; text-underline-offset: 4px; }
.footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3); padding-top: var(--s-5); font-size: 0.875rem; color: var(--text-muted); }
.footer__bottom a { text-decoration: none; color: var(--text-muted); }
.footer__bottom a:hover { color: var(--carbon); }

/* Aparición al desplazarse */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1180px) {
  .nav__links { display: none; }
  .nav__menu { display: grid; }
}

@media (max-width: 1023px) {
  .rail { display: none; }
  .hero__inner { padding: 140px var(--gutter) var(--s-5); }
  .hero__inner > * { max-width: 640px; }
  .hero__shade { background: linear-gradient(180deg, rgba(34, 38, 42, 0.55) 0%, rgba(34, 38, 42, 0.6) 45%, rgba(34, 38, 42, 0.88) 100%); }
  .svc__tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .svc__panel { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); }
  .svc__list { grid-template-columns: 1fr; }
  .approach__grid, .contact__grid, .about__grid { grid-template-columns: 1fr; }
  .approach__media { aspect-ratio: 16 / 10; }
}

@media (max-width: 767px) {
  html { scroll-padding-top: 92px; }
  .site-header { padding: var(--s-3) var(--s-3); }
  .nav { min-height: 64px; padding-left: var(--s-4); }
  .nav__symbol img { height: 40px; }
  .nav__wordmark img { height: 24px; }
  .nav__wordmark span { font-size: 8.5px; letter-spacing: 0.3em; margin-right: -0.3em; }
  .nav__menu { width: 46px; height: 46px; }
  .hero__inner { padding-top: 120px; }
  .hero__cards { grid-template-columns: 1fr 1fr; }
  .card { aspect-ratio: 4 / 3; }
  .hero__bar { display: none; }
  .svc__tab { font-size: 0.9375rem; padding-right: var(--s-2); }
  .icon { width: 42px; height: 42px; font-size: 26px; }
  .svc__panel { grid-template-columns: 1fr; }
  .svc__media { aspect-ratio: 4 / 3; }
  .svc__text { padding: 0 var(--s-2) var(--s-2); }
  .principles li { grid-template-columns: 56px 1fr; gap: var(--s-4); }
  /* Flujo vertical en celular */
  .flow { --node: 60px; }
  .flow__track { left: calc(var(--node) / 2 - 1px); right: auto; width: 2px; height: auto; top: calc(var(--flow-top, 0px) + var(--node) / 2); bottom: var(--s-8); }
  .flow__fill { transform-origin: top; transform: scaleY(0); background: linear-gradient(180deg, var(--terracota), var(--arena)); }
  .flow.is-visible .flow__fill { transform: scaleY(1); }
  .flow__spark { display: none; }
  .flow__steps { grid-template-columns: 1fr; gap: var(--s-6); }
  .flow__step { display: grid; grid-template-columns: var(--node) 1fr; column-gap: var(--s-5); text-align: left; padding: 0; }
  .flow__node { grid-row: span 2; margin: 0; }
  .flow__step h4 { margin-top: var(--s-2); }
  .flow__step p { margin: var(--s-1) 0 0; max-width: none; }
  .about__areas div { grid-template-columns: 1fr; gap: var(--s-1); }
  .form { grid-template-columns: 1fr; }
  .form__footer .btn { width: 100%; }
  .footer__grid { flex-direction: column; align-items: flex-start; }
}

@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; }
  .hero__title, .hero__lead, .hero__cards li, .reveal { opacity: 1; transform: none; }
  .flow__spark { display: none; }
}