/* Silaud · sitio público */
:root, [data-theme="dark"] {
  --bg: #06120d;
  --bg2: #0a1c14;
  --surface: rgba(18, 44, 32, .55);
  --surface-solid: #0f261b;
  --line: rgba(120, 255, 190, .14);
  --text: #e6fff3;
  --muted: #8fb8a5;
  --accent: #2ee59d;
  --accent2: #0fb979;
  --accent3: #b6ff5c;
  --on-accent: #03170e;
  --glow: rgba(46, 229, 157, .35);
  --shadow: 0 20px 60px rgba(0, 0, 0, .45);
  --net: 46, 229, 157;
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #f3fbf7;
  --bg2: #e6f6ee;
  --surface: rgba(255, 255, 255, .75);
  --surface-solid: #ffffff;
  --line: rgba(10, 110, 70, .14);
  --text: #0a2a1c;
  --muted: #4d7263;
  --accent: #0aa56a;
  --accent2: #087f52;
  --accent3: #5dbb1a;
  --on-accent: #ffffff;
  --glow: rgba(10, 165, 106, .25);
  --shadow: 0 20px 50px rgba(10, 80, 50, .12);
  --net: 10, 150, 95;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 "Inter", system-ui, sans-serif; overflow-x: hidden;
  transition: background-color .5s ease, color .5s ease;
}
h1, h2, h3 { font-family: "Space Grotesk", system-ui, sans-serif; line-height: 1.1; margin: 0; letter-spacing: -.02em; }
a { color: inherit; }
img { display: block; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }

/* Barra de progreso y foco del cursor */
.progress { position: fixed; inset: 0 auto auto 0; height: 3px; width: 100%; transform-origin: 0 50%; transform: scaleX(0);
  background: linear-gradient(90deg, var(--accent), var(--accent3)); z-index: 60; }
.spot { position: fixed; width: 520px; height: 520px; left: 0; top: 0; pointer-events: none; z-index: 0; border-radius: 50%;
  background: radial-gradient(circle, var(--glow), transparent 65%); opacity: .5; transform: translate(-50%, -50%);
  transition: opacity .4s; will-change: left, top; }
@media (hover: none) { .spot { display: none; } }

/* Botones */
.btn { display: inline-flex; align-items: center; gap: .5em; padding: .9em 1.5em; border-radius: 999px; border: 0; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); color: var(--on-accent); font-weight: 600; text-decoration: none;
  box-shadow: 0 8px 30px var(--glow); position: relative; overflow: hidden; transition: box-shadow .3s, transform .2s; font: inherit; font-weight: 600; }
.btn::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.45) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform .7s; }
.btn:hover::after { transform: translateX(120%); }
.btn:hover { box-shadow: 0 12px 40px var(--glow); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); box-shadow: none; backdrop-filter: blur(8px); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.small { padding: .6em 1.15em; font-size: .92rem; }
.btn:focus-visible, a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* Navegación */
.nav { position: fixed; top: 14px; left: 50%; transform: translateX(-50%); width: min(1160px, calc(100% - 24px)); z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 12px 10px 18px; border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 70%, transparent); border: 1px solid var(--line); backdrop-filter: blur(16px);
  transition: box-shadow .3s, top .3s; }
.nav.scrolled { box-shadow: var(--shadow); top: 8px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.3rem "Space Grotesk", sans-serif; }
.links { display: flex; gap: 6px; }
.links a { text-decoration: none; padding: .5em .9em; border-radius: 999px; color: var(--muted); font-weight: 500; transition: color .2s, background .2s; }
.links a:hover, .links a.on { color: var(--text); background: var(--surface); }
.nav-right { display: flex; align-items: center; gap: 8px; }
.theme { width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); color: var(--text);
  cursor: pointer; display: grid; place-items: center; position: relative; overflow: hidden; }
.theme svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; position: absolute;
  transition: transform .6s cubic-bezier(.6,-0.4,.3,1.4), opacity .4s; }
[data-theme="dark"] .i-sun, [data-theme="light"] .i-moon { transform: translateY(30px) rotate(90deg); opacity: 0; }
.burger { display: none; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); cursor: pointer; }
.burger i { display: block; width: 18px; height: 2px; background: var(--text); margin: 5px auto; transition: transform .3s; }
.burger[aria-expanded="true"] i:first-child { transform: translateY(3.5px) rotate(45deg); }
.burger[aria-expanded="true"] i:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* Transición de tema: círculo que se expande desde el botón */
.theme-wave { position: fixed; z-index: 100; border-radius: 50%; pointer-events: none; transform: translate(-50%, -50%) scale(0);
  animation: wave .7s ease-out forwards; }
@keyframes wave { to { transform: translate(-50%, -50%) scale(1); opacity: 0; } }

/* Hero */
.hero { position: relative; min-height: 100vh; display: grid; align-items: center; padding: 120px 24px 80px; overflow: hidden; }
#net { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 160px; background: linear-gradient(transparent, var(--bg)); pointer-events: none; }
.hero-grid { position: relative; z-index: 1; width: min(1160px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; font: 600 .8rem "JetBrains Mono", monospace;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--glow); animation: pulse 1.8s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 12px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
.hero h1 { font-size: clamp(2.5rem, 6vw, 4.6rem); }
.grad { background: linear-gradient(100deg, var(--accent), var(--accent3), var(--accent), var(--accent3)); background-size: 300% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent; animation: shine 6s linear infinite; }
@keyframes shine { to { background-position: -300% 0; } }
.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); color: var(--muted); margin: 22px 0 32px; }
.lead b { color: var(--text); }
.typed { color: var(--accent); font-weight: 600; }
.caret { display: inline-block; width: 2px; height: 1.1em; background: var(--accent); vertical-align: -3px; margin-left: 3px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.cta.center { justify-content: center; }

.code-card { position: relative; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); backdrop-filter: blur(14px);
  box-shadow: var(--shadow); transform: perspective(900px) rotateY(-10deg) rotateX(4deg); transition: transform .4s; }
.code-card:hover { transform: perspective(900px) rotateY(0) rotateX(0); }
.code-top { display: flex; align-items: center; gap: 7px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.code-top i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.code-top i:nth-child(2) { background: #febc2e; } .code-top i:nth-child(3) { background: #28c840; }
.code-top span { margin-left: 8px; font: .8rem "JetBrains Mono", monospace; color: var(--muted); }
#code { margin: 0; padding: 20px 22px 26px; min-height: 290px; font: .9rem/1.7 "JetBrains Mono", monospace; white-space: pre-wrap; color: var(--text); }
#code .k { color: var(--accent); } #code .s { color: var(--accent3); } #code .c { color: var(--muted); } #code .f { color: #6fd3ff; }
[data-theme="light"] #code .f { color: #0b76b8; }
#code .cur { display: inline-block; width: 8px; height: 1.1em; background: var(--accent); vertical-align: -3px; animation: blink 1s steps(1) infinite; }
.float { position: absolute; padding: 8px 14px; border-radius: 999px; background: var(--surface-solid); border: 1px solid var(--line);
  box-shadow: var(--shadow); font-weight: 600; font-size: .9rem; animation: bob 5s ease-in-out infinite; white-space: nowrap; }
.f1 { top: -18px; right: 24px; } .f2 { bottom: 40px; left: -34px; animation-delay: -1.6s; } .f3 { bottom: -16px; right: 40px; animation-delay: -3.2s; }
@keyframes bob { 50% { transform: translateY(-12px); } }
.scroll-hint { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid var(--line); border-radius: 20px; z-index: 2; }
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--accent); animation: wheel 1.8s infinite; }
@keyframes wheel { 80% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

/* Cinta */
.band { overflow: hidden; padding: 24px 0; }
.marquee { overflow: hidden; border-block: 1px solid var(--line); background: var(--bg2); padding: 18px 0; transform: rotate(-1.5deg) scaleX(1.04); }
.track { display: flex; gap: 28px; width: max-content; animation: slide 30s linear infinite; font: 600 clamp(1.1rem, 2.4vw, 1.6rem) "Space Grotesk", sans-serif; white-space: nowrap; }
.track b { color: var(--accent); }
.marquee:hover .track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }

/* Secciones */
.section { position: relative; z-index: 1; padding: 110px 24px; width: min(1160px, 100%); margin: 0 auto; }
.section.alt { width: 100%; max-width: none; background: var(--bg2); }
.section.alt > * { width: min(1160px, 100%); margin-left: auto; margin-right: auto; }
.head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.head h2, .why h2, .contact h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); margin-bottom: 14px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { position: relative; padding: 30px 26px; border-radius: 22px; background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(10px); transform-style: preserve-3d; transition: border-color .3s, box-shadow .3s; overflow: hidden; }
.card::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), var(--glow), transparent 45%); }
.card:hover { border-color: color-mix(in srgb, var(--accent) 50%, transparent); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card h3 { font-size: 1.3rem; margin: 18px 0 8px; }
.card p { margin: 0; color: var(--muted); }
.ic { width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; transform: translateZ(30px);
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 25%, transparent), transparent); border: 1px solid var(--line); }
.ic svg { width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.card:hover .ic svg { animation: wiggle .6s; }
@keyframes wiggle { 30% { transform: rotate(-12deg) scale(1.1); } 60% { transform: rotate(8deg) scale(1.1); } }

/* Proceso */
.steps-wrap { position: relative; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.line { position: absolute; top: 36px; left: 12%; right: 12%; height: 2px; background: var(--line); }
.line i { display: block; height: 100%; width: 100%; transform-origin: 0 50%; transform: scaleX(var(--p, 0));
  background: linear-gradient(90deg, var(--accent), var(--accent3)); box-shadow: 0 0 12px var(--glow); }
.step { text-align: center; padding: 0 10px; }
.num { display: grid; place-items: center; width: 72px; height: 72px; margin: 0 auto 18px; border-radius: 50%; position: relative; z-index: 1;
  background: var(--bg2); border: 2px solid var(--line); font: 700 1.2rem "JetBrains Mono", monospace; color: var(--accent); transition: all .5s; }
.step.lit .num { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: var(--on-accent); border-color: transparent;
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 15%, transparent), 0 10px 30px var(--glow); }
.step h3 { font-size: 1.25rem; margin-bottom: 6px; }
.step p { margin: 0; color: var(--muted); }

/* Por qué */
.why { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; }
.checks li { display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; padding: 16px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.checks li::before { content: "✓"; grid-row: span 2; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2)); color: var(--on-accent); font-weight: 700; }
.checks span { color: var(--muted); font-size: .95rem; }
.orb-wrap { display: grid; place-items: center; }
.orb { position: relative; width: min(380px, 80vw); aspect-ratio: 1; display: grid; place-items: center; }
.orb img { width: 30%; height: auto; filter: drop-shadow(0 0 30px var(--glow)); animation: float 6s ease-in-out infinite; }
@keyframes float { 50% { transform: translateY(-14px) rotate(4deg); } }
.ring { position: absolute; inset: 0; border-radius: 50%; border: 1px dashed color-mix(in srgb, var(--accent) 45%, transparent); animation: spin 30s linear infinite; }
.ring::after { content: ""; position: absolute; top: -6px; left: 50%; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 16px var(--accent); }
.r2 { inset: 14%; animation-duration: 20s; animation-direction: reverse; border-style: solid; border-color: var(--line); }
.r2::after { background: var(--accent3); box-shadow: 0 0 16px var(--accent3); }
.r3 { inset: 28%; animation-duration: 12s; background: radial-gradient(circle, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Contacto */
.contact-card { position: relative; overflow: hidden; text-align: center; padding: 80px 28px; border-radius: 32px; background: var(--surface); border: 1px solid var(--line); }
.contact-card > * { position: relative; }
.contact-card .muted { margin: 0 auto 30px; max-width: 520px; }
.blob { position: absolute !important; width: 420px; height: 420px; border-radius: 50%; filter: blur(70px); opacity: .45; animation: drift 12s ease-in-out infinite; }
.b1 { background: var(--accent); top: -200px; left: -120px; }
.b2 { background: var(--accent3); bottom: -220px; right: -120px; animation-delay: -6s; opacity: .3; }
@keyframes drift { 50% { transform: translate(80px, 40px) scale(1.15); } }

.foot { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  width: min(1160px, 100%); margin: 0 auto; padding: 30px 24px 40px; border-top: 1px solid var(--line); }
.foot p { margin: 0; }

.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 40; width: 58px; height: 58px; border-radius: 50%; display: grid; place-items: center;
  background: #25d366; box-shadow: 0 10px 30px rgba(37, 211, 102, .45); animation: pop 3s ease-in-out infinite; }
.wa-float svg { width: 30px; height: 30px; fill: #fff; }
@keyframes pop { 0%, 90%, 100% { transform: scale(1); } 95% { transform: scale(1.12); } }

/* Aparición al hacer scroll */
.js .reveal { opacity: 0; transform: translateY(40px); filter: blur(6px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1), filter .9s; transition-delay: var(--d, 0s); }
.js .reveal.in { opacity: 1; transform: none; filter: none; }
.js .code-card.reveal.in { transform: perspective(900px) rotateY(-10deg) rotateX(4deg); }
.js .code-card.reveal.in:hover { transform: perspective(900px) rotateY(0) rotateX(0); }

/* Celular y tablet */
@media (max-width: 960px) {
  .hero-grid, .why { grid-template-columns: 1fr; }
  .code-card { transform: none !important; max-width: 560px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .line { display: none; }
  .orb-wrap { order: -1; }
}
@media (max-width: 760px) {
  .links { position: fixed; top: 70px; left: 0; right: 0; flex-direction: column; padding: 14px; border-radius: 22px;
    background: var(--surface-solid); border: 1px solid var(--line); box-shadow: var(--shadow);
    opacity: 0; pointer-events: none; transform: translateY(-10px); transition: opacity .25s, transform .25s; }
  .links.open { opacity: 1; pointer-events: auto; transform: none; }
  .links a { padding: .8em 1em; }
  .burger { display: block; }
  .hide-sm { display: none; }
  .hero { padding: 110px 16px 80px; }
  .section { padding: 80px 16px; }
  .cards, .steps { grid-template-columns: 1fr; }
  .f2 { left: 8px; }
  .contact-card { padding: 60px 18px; }
  #code { font-size: .78rem; min-height: 250px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; filter: none; }
}