:root {
  --bg: #000;
  --panel: rgba(10, 12, 18, .72);
  --ink: #EDF1F8;
  --muted: #9AA6BC;
  --line: rgba(255, 255, 255, .13);
  --cyan: #4CC9F0;
  --violet: #8B6CFF;
  --ok: #4ADE80;
  --err: #FF6B6B;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Figtree", "Segoe UI", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; background: var(--bg); color-scheme: dark; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.0625rem/1.65 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--cyan); text-underline-offset: .2em; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; border-radius: 3px; }
::selection { background: var(--violet); color: #fff; }
.wrap { width: min(72rem, 100% - 2.5rem); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--cyan); color: #000; padding: .6rem 1rem; z-index: 200; }
.skip:focus { left: 0; }

/* Fondo: foto opcional, circuito, escena 3D y viñeta */
.bg-photo, .bg-circuit, .bg-vignette, #bg-canvas { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.bg-photo { z-index: -4; background: url("/assets/img/bg.jpg") center / cover no-repeat; opacity: .28; }
.bg-circuit { z-index: -3; background: url("/assets/img/circuit.svg") 0 0 / 480px; opacity: .22; -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 75%); mask-image: radial-gradient(ellipse at 70% 30%, #000 0%, transparent 75%); }
#bg-canvas { z-index: -2; display: block; opacity: 0; transition: opacity 1.4s ease; }
#bg-canvas.ready { opacity: 1; }
.bg-vignette { z-index: -1; background: radial-gradient(ellipse at center, transparent 40%, rgba(0,0,0,.75) 100%); }
.no-webgl .bg-vignette { background: radial-gradient(ellipse at 70% 25%, rgba(76,201,240,.18), transparent 55%), radial-gradient(ellipse at 20% 80%, rgba(139,108,255,.16), transparent 50%); }

.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 120; background: linear-gradient(90deg, var(--cyan), var(--violet)); transform-origin: 0 50%; transform: scaleX(var(--p, 0)); }

/* Cabecera */
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid transparent; transition: background-color .25s, border-color .25s, backdrop-filter .25s; }
.site-header.scrolled { background: rgba(0,0,0,.72); backdrop-filter: blur(12px); border-color: var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; min-height: 4.2rem; }
.brand { font: 800 1.3rem var(--display); color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.menu { display: flex; align-items: center; gap: 1.75rem; }
.menu a { color: var(--ink); text-decoration: none; font-weight: 500; padding: .25rem 0; border-bottom: 2px solid transparent; }
.menu a:hover { border-color: var(--cyan); }
.menu .menu-cta { border: 1px solid var(--cyan); border-radius: .5rem; padding: .45rem 1rem; }
.menu .menu-cta:hover, .menu .menu-cta[aria-current="page"] { background: var(--cyan); color: #000; }
.nav-toggle { display: none; font: 500 1rem var(--body); background: none; border: 1px solid var(--line); border-radius: .4rem; padding: .4rem .8rem; color: var(--ink); cursor: pointer; }

/* Portada */
.hero { min-height: calc(100svh - 4.2rem); display: flex; align-items: center; padding: 3rem 0 5rem; }
.hero-kicker { margin: 0 0 1rem; color: var(--muted); font-weight: 500; }
.hero-title { margin: 0; font: 800 clamp(4.2rem, 17vw, 14rem)/.86 var(--display); letter-spacing: -.045em; text-shadow: 0 0 60px rgba(76,201,240,.25); }
.hero-title.small { font-size: clamp(3rem, 10vw, 7rem); }
.hero-title span { display: inline-block; }
.hero-title span:last-child { background: linear-gradient(100deg, var(--cyan), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: none; }
.hero-role { margin: 1.75rem 0 0; font: 500 clamp(1.25rem, 3vw, 2rem) var(--display); min-height: 1.4em; }
.caret { display: inline-block; width: .09em; height: 1em; margin-left: .15em; background: var(--cyan); vertical-align: -.1em; animation: blink 1s steps(1) infinite; }
.hero-lead { max-width: 34rem; margin: 1.5rem 0 0; font-size: 1.25rem; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.25rem; }

/* Botones */
.btn { display: inline-block; font: 600 1rem var(--body); text-decoration: none; padding: .85rem 1.7rem; border-radius: .55rem; border: 2px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background-color .15s, color .15s; }
.btn-primary { background: var(--cyan); color: #000; box-shadow: 0 0 0 0 rgba(76,201,240,.5); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px -6px rgba(76,201,240,.7); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: rgba(255,255,255,.04); }
.btn-ghost:hover { border-color: var(--violet); background: rgba(139,108,255,.15); }
.btn[disabled] { opacity: .6; cursor: progress; }
.copy, .to-top { font: 500 .9rem var(--body); color: var(--ink); background: rgba(255,255,255,.06); border: 1px solid var(--line); border-radius: .4rem; padding: .25rem .7rem; cursor: pointer; }
.copy:hover, .to-top:hover { border-color: var(--cyan); }

/* Secciones */
.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; background: rgba(0,0,0,.6); border-top: 1px solid var(--line); }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 2.5rem 4rem; align-items: center; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -.02em; line-height: 1.1; margin: 0; }
h2, .page-head h1 { font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 700; margin-bottom: 2rem; }
h3 { font-size: 1.35rem; font-weight: 700; }
.prose p { max-width: 36rem; margin: 0 0 1.1rem; color: #C9D2E3; }
.prose p:first-child { font: 500 clamp(1.25rem, 2.4vw, 1.6rem)/1.4 var(--display); color: var(--ink); }
.prose-lead { margin: 0 0 2rem; font-size: 1.2rem; }

/* 3D tilt */
[data-tilt] { transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transition: transform .18s ease-out; position: relative; }
[data-tilt]::after { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .2s; background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(76,201,240,.22), transparent 55%); }
[data-tilt]:hover::after { opacity: 1; }

/* Ventana de código */
.code { margin: 0; background: rgba(6, 8, 14, .9); border: 1px solid var(--line); border-radius: .9rem; box-shadow: 0 30px 80px -30px rgba(76,201,240,.35); overflow: hidden; }
.code figcaption { display: flex; align-items: center; gap: .8rem; padding: .7rem 1rem; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.dots { display: inline-flex; gap: .4rem; }
.dots i { width: .7rem; height: .7rem; border-radius: 50%; background: #2A2F3B; }
.dots i:nth-child(1) { background: #FF5F57; } .dots i:nth-child(2) { background: #FEBC2E; } .dots i:nth-child(3) { background: #28C840; }
.code pre { margin: 0; padding: 1.25rem 1.4rem; overflow-x: auto; font: 400 .95rem/1.7 ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.code .c { color: #6B7891; } .code .k { color: var(--violet); } .code .s { color: var(--cyan); }

/* Cifras */
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin: 0; }
.facts > div { padding: 1.5rem; background: var(--panel); border: 1px solid var(--line); border-radius: .9rem; backdrop-filter: blur(6px); }
.facts dt { color: var(--muted); font-size: .95rem; }
.facts dd { margin: .3rem 0 0; font: 800 3rem/1 var(--display); }

/* Tecnologías */
.stack { display: flex; flex-wrap: wrap; gap: .9rem; list-style: none; margin: 0; padding: 0; }
.stack li { padding: .9rem 1.5rem; background: var(--panel); border: 1px solid var(--line); border-radius: .7rem; font: 700 1.1rem var(--display); backdrop-filter: blur(6px); }

/* Proyectos */
.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr)); gap: 1.25rem; }
.project { padding: 1.75rem; background: var(--panel); border: 1px solid var(--line); border-radius: .9rem; backdrop-filter: blur(6px); }
.project p { color: #C9D2E3; margin: .75rem 0 1rem; }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; margin: 0 0 1.25rem; padding: 0; }
.tags li { font-size: .85rem; padding: .15rem .65rem; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); }
.link { font-weight: 600; }

/* Proceso (secuencia real: numerada) */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1.25rem; list-style: none; margin: 0; padding: 0; counter-reset: none; }
.steps li { padding: 1.5rem; background: var(--panel); border: 1px solid var(--line); border-radius: .9rem; backdrop-filter: blur(6px); }
.steps .n { display: inline-grid; place-items: center; width: 2.2rem; height: 2.2rem; margin-bottom: 1rem; border-radius: 50%; background: linear-gradient(135deg, var(--cyan), var(--violet)); color: #000; font: 800 1rem var(--display); }
.steps p { margin: .5rem 0 0; color: #C9D2E3; }

.cta { padding: clamp(4rem, 9vw, 7rem) 0; background: linear-gradient(120deg, rgba(76,201,240,.16), rgba(139,108,255,.2)), rgba(0,0,0,.7); border-top: 1px solid var(--line); }
.cta .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.cta h2 { margin: 0; }

/* Formulario */
.page-head { min-height: 70svh; }
.form { display: grid; gap: 1.25rem; max-width: 36rem; }
.field label { display: block; font-weight: 600; margin-bottom: .35rem; }
.field input, .field textarea { width: 100%; font: inherit; color: var(--ink); background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.25); border-radius: .55rem; padding: .8rem .95rem; }
.field input:focus, .field textarea:focus { border-color: var(--cyan); outline: none; box-shadow: 0 0 0 3px rgba(76,201,240,.3); }
.field textarea { resize: vertical; }
.field [aria-invalid="true"] { border-color: var(--err); }
.error { color: var(--err); font-size: .95rem; margin: .3rem 0 0; }
.error:empty, .notice:empty { display: none; }
.notice { margin: 0 0 1.25rem; padding: .8rem 1rem; border-radius: .55rem; border: 1px solid var(--line); background: var(--panel); }
.notice.ok { border-color: var(--ok); color: var(--ok); }
.notice.err { border-color: var(--err); color: var(--err); }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* Pie */
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0; background: rgba(0,0,0,.85); color: var(--muted); font-size: .95rem; }
.foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 2rem; }
.foot p { margin: 0; }

/* Animaciones */
@keyframes blink { 50% { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(.3em) rotateX(40deg); } }
@media (prefers-reduced-motion: no-preference) {
  .hero-title span { animation: rise .9s cubic-bezier(.2,.7,.2,1) both; }
  .hero-title span:last-child { animation-delay: .14s; }
  .js .reveal { opacity: 0; translate: 0 28px; transition: opacity .7s ease var(--d, 0ms), translate .7s cubic-bezier(.2,.7,.2,1) var(--d, 0ms); }
  .js .reveal.in { opacity: 1; translate: 0 0; }
}
@media (prefers-reduced-motion: reduce) { .caret { animation: none; } html { scroll-behavior: auto; } }

@media (max-width: 52rem) {
  .split { grid-template-columns: 1fr; }
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  #bg-canvas { opacity: .6; }
  #bg-canvas.ready { opacity: .6; }
  .nav-toggle { display: inline-block; }
  .menu { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: rgba(0,0,0,.94); border-bottom: 1px solid var(--line); padding: .5rem 1.25rem 1rem; }
  .menu.open { display: flex; }
  .menu a { padding: .75rem 0; }
  .menu .menu-cta { margin-top: .5rem; text-align: center; }
}