/* Hydrosimulation — consultoría hidráulica.
   Superficies claras con azul profundo como tinta (como las consultoras del sector),
   portada oscura con la escena de la crecida, y la escala espectral de profundidad
   como firma de la marca. */

:root {
  --navy: #071830;
  --navy-2: #0b2347;
  --ink: #0a1f3d;
  --ink-2: #425a78;
  --cyan: #22d3ee;
  --blue: #1c4fd8;
  --bg: #ffffff;
  --bg-soft: #f2f7fb;
  --line: #d6e2ee;
  --on-dark: #e9f2fb;
  --on-dark-2: #a9bed3;
  --spectrum: linear-gradient(90deg, #22d3ee 0%, #1e7bff 18%, #00dcc0 40%, #7fe020 60%, #ffe600 78%, #ff4a1a 100%);
  --display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --body: "Source Sans 3", system-ui, sans-serif;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --max: 74rem;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; scrollbar-color: var(--ink) var(--bg-soft); }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.125rem/1.65 var(--body); -webkit-font-smoothing: antialiased; }
img, video { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--display); font-stretch: 110%; font-weight: 800; line-height: 1.05; margin: 0; text-wrap: balance; letter-spacing: -0.02em; }
p { margin: 0; text-wrap: pretty; max-width: 62ch; }
a { color: inherit; text-underline-offset: .25em; text-decoration-thickness: 1px; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

::selection { background: var(--ink); color: #fff; }
::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: #a9bed3; border: 3px solid var(--bg-soft); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #7d98b6; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: .6rem 1rem; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; }

/* ---------- Cabecera ---------- */
.top { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 2rem; padding: .85rem var(--gutter); background: rgba(7, 24, 48, .92); backdrop-filter: blur(10px); color: var(--on-dark); border-bottom: 1px solid rgba(169, 190, 211, .14); }
.brand { display: flex; align-items: center; gap: .7rem; text-decoration: none; font: 700 1.1rem/1 var(--display); font-stretch: 110%; letter-spacing: -.01em; }
.brand img { border-radius: 10px; }
.top nav { margin-left: auto; display: flex; gap: 1.8rem; }
.top nav a { text-decoration: none; color: var(--on-dark-2); font-weight: 500; font-size: 1rem; transition: color .2s; }
.top nav a:hover { color: #fff; }

.btn { display: inline-flex; align-items: center; gap: .6rem; padding: .95rem 1.5rem; background: var(--cyan); color: var(--navy); font: 700 1rem/1 var(--display); font-stretch: 105%; text-decoration: none; border-radius: 999px; border: 2px solid var(--cyan); transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .2s, border-color .2s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(34, 211, 238, .55); }
.btn:active { transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--on-dark); border-color: rgba(233, 242, 251, .45); }
.btn-ghost:hover { border-color: #fff; box-shadow: none; }
.btn-small .sm { display: none; }
.btn-small { padding: .65rem 1.15rem; font-size: .95rem; white-space: nowrap; }
.btn-big { font-size: clamp(1.1rem, 2.6vw, 1.6rem); padding: 1.15rem 1.9rem; margin-top: 1.8rem; }

/* ---------- Portada (oscura, con la escena) ---------- */
.hero { position: relative; background: var(--navy); color: var(--on-dark); min-height: min(86vh, 800px); display: flex; align-items: center; overflow: hidden; isolation: isolate; }
.scene { position: absolute; inset: 0; z-index: -1; background: var(--navy) url("assets/hero-inundacion.jpg") 70% center / cover no-repeat; }
.scene.ready { background-image: none; }
.scene canvas { width: 100% !important; height: 100% !important; display: block; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(90deg, rgba(7, 24, 48, .97) 0%, rgba(7, 24, 48, .9) 34%, rgba(7, 24, 48, .45) 54%, rgba(7, 24, 48, 0) 76%); }
.hero-copy { width: 100%; max-width: var(--max); margin: 0 auto; padding: clamp(4rem, 9vw, 7rem) var(--gutter); }
.hero h1 { font-size: clamp(2.1rem, 4.2vw, 3.7rem); max-width: 18ch; }
.hero .lead { margin-top: 1.5rem; font-size: clamp(1.1rem, 1.5vw, 1.3rem); color: var(--on-dark-2); max-width: 38ch; }
.actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.2rem; }

.legend { position: absolute; right: var(--gutter); bottom: 1.6rem; width: min(15rem, 40vw); display: grid; gap: .35rem; font-size: .78rem; color: var(--on-dark-2); padding: .8rem .9rem; border-radius: 12px; background: rgba(7, 24, 48, .78); backdrop-filter: blur(6px); }
.legend-title { color: var(--on-dark); font-weight: 600; }
.legend-bar { display: block; height: 7px; border-radius: 4px; background: var(--spectrum); }
.legend-scale { display: flex; justify-content: space-between; }
.legend-scale b { font-weight: 500; }
.legend-note { opacity: .8; }

.hero-copy h1, .hero-copy .lead, .actions { animation: rise .9s var(--ease) both; }
.hero-copy .lead { animation-delay: .12s; }
.actions { animation-delay: .22s; }
.legend-bar { transform-origin: left; animation: fill 1.4s var(--ease) .3s both; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes fill { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* ---------- Servicios ---------- */
.services { padding: clamp(4rem, 9vw, 8rem) 0 clamp(3rem, 7vw, 6rem); }
.services h2, .method h2, .open h2, .soon h2, .contact h2 { font-size: clamp(1.9rem, 4vw, 3.2rem); }
.services h2 { margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.service { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 1rem clamp(1.5rem, 5vw, 4rem); padding: clamp(1.8rem, 4vw, 2.8rem) 0; position: relative; }
.service::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--spectrum); }
.service h3 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
.service p { color: var(--ink-2); }
.deliver { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.2rem; }
.deliver li { font-size: .95rem; font-weight: 500; padding: .45rem .85rem; border-radius: 999px; background: var(--bg-soft); border: 1px solid var(--line); color: var(--ink); }

/* ---------- Método ---------- */
.method { background: var(--bg-soft); padding: clamp(4rem, 9vw, 7rem) 0; }
.steps { margin-top: clamp(2rem, 5vw, 3.2rem); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(1.2rem, 3vw, 2.2rem); counter-reset: paso; }
.steps li { counter-increment: paso; padding-top: 1.1rem; border-top: 2px solid var(--ink); }
.steps li::before { content: counter(paso); display: block; font: 800 1.1rem/1 var(--display); color: var(--blue); margin-bottom: .8rem; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 1.35rem; }
.steps p { margin-top: .6rem; color: var(--ink-2); font-size: 1.02rem; }

/* ---------- Herramientas de libre acceso ---------- */
.open { padding: clamp(4rem, 8vw, 6.5rem) 0; }
.open-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(1.5rem, 5vw, 4rem); align-items: center; }
.open p { margin-top: 1.1rem; color: var(--ink-2); }
.tools { display: flex; flex-wrap: wrap; gap: .6rem; }
.tools li { font: 700 1rem/1 var(--display); padding: .8rem 1.1rem; border-radius: 10px; background: var(--ink); color: #fff; }

/* ---------- Cursos y apps ---------- */
.soon { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); --edge: max(var(--gutter), calc((100vw - var(--max)) / 2 + var(--gutter))); }
.soon > div { padding: clamp(3rem, 7vw, 6rem) clamp(1.5rem, 4vw, 3.5rem); display: flex; flex-direction: column; align-items: flex-start; gap: 1.2rem; }
.soon p { opacity: .85; }
.soon .btn { margin-top: .6rem; }
.chip { font: 600 .8rem/1 var(--body); letter-spacing: .02em; padding: .5rem .8rem; border-radius: 999px; border: 1px solid currentColor; white-space: nowrap; }
.soon-courses { background: var(--bg-soft); color: var(--ink); padding-left: var(--edge) !important; border-top: 1px solid var(--line); }
.soon-courses .btn { background: var(--ink); border-color: var(--ink); color: #fff; }
.soon-courses .btn:hover { box-shadow: 0 10px 24px -8px rgba(10, 31, 61, .5); }
.soon-apps { background: var(--navy-2); color: var(--on-dark); padding-right: var(--edge) !important; }

/* ---------- Contacto ---------- */
.contact { background: var(--navy); color: var(--on-dark); padding: clamp(4rem, 9vw, 7rem) var(--gutter); text-align: center; }
.contact > * { margin-left: auto; margin-right: auto; }
.contact p { margin-top: 1rem; color: var(--on-dark-2); }
.contact .place { display: flex; align-items: center; justify-content: center; gap: .5rem; margin-top: 1.4rem; color: var(--on-dark); font-weight: 500; }
.social { display: flex; justify-content: center; gap: 2rem; margin-top: 2.2rem; }
.social a { font-weight: 600; text-decoration: none; border-bottom: 1px solid var(--cyan); padding-bottom: .15rem; }
.social a:hover { color: var(--cyan); }

footer { background: var(--navy); color: var(--on-dark-2); padding: 1.6rem var(--gutter); font-size: .9rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .4rem 2rem; border-top: 1px solid rgba(169, 190, 211, .14); }

/* ---------- Responsive ---------- */
@media (max-width: 62rem) {
  .service, .open-grid, .soon { grid-template-columns: minmax(0, 1fr); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .soon > div { padding-left: var(--gutter) !important; padding-right: var(--gutter) !important; }
  .hero { min-height: 0; display: block; }
  .scene { position: relative; inset: auto; z-index: 0; height: min(78vw, 26rem); background-position: center; }
  .hero::after { display: none; }
  .hero-copy { padding-top: 2rem; padding-bottom: 1.6rem; }
  .hero { padding-bottom: 1.6rem; }
  .legend { position: static; margin: 0 var(--gutter); width: min(16rem, 100%); }
}
@media (max-width: 44rem) {
  .top { gap: .8rem; }
  .brand { font-size: 1rem; }
  .brand img { width: 34px; height: 34px; }
  .top nav { display: none; }
  .top .btn-small { margin-left: auto; padding: .6rem .95rem; font-size: .88rem; }
  .btn-small .lg { display: none; }
  .btn-small .sm { display: inline; }
  body { font-size: 1.05rem; }
  .steps { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}