/* Knacklabor — estilo futurista (basado en el prototipo de Limmat, identidad propia: rojo + azul de Limmat (Red Team vs Blue Team) + ámbar).
   Sin fuentes externas, sin JS, sin cookies: compatible con CSP estricta. */
:root {
  --blue: #1e9bff;
  --blue-dim: #0072CC;
  --red: #ff2020;
  --amber: #ffb020;
  --bg: #04060c;
  --bg-2: #080c16;
  --panel: rgba(14, 22, 40, .55);
  --line: rgba(0, 150, 255, .16);
  --text: #c7d3e6;
  --muted: #7d8aa3;
  --white: #f2f7ff;
  --radius: 16px;
  --max: 1100px;
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  background-image:
    linear-gradient(rgba(0, 150, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 150, 255, .035) 1px, transparent 1px);
  background-size: 44px 44px;
}
::selection { background: var(--blue); color: #000; }
a { color: var(--blue); }
a:hover { color: var(--white); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; position: relative; z-index: 1; }

/* Logo de texto */
.logo {
  font-family: var(--mono); font-weight: 800; font-size: 27px; letter-spacing: .04em;
  color: var(--white); text-decoration: none; display: inline-flex; align-items: center; gap: 2px;
}
.logo img { margin-right: 10px; filter: drop-shadow(0 0 8px rgba(0, 150, 255, .35)); }
.logo .k { color: var(--blue); text-shadow: 0 0 12px rgba(0, 150, 255, .7); }
.logo .cur { color: var(--red); animation: blink 1s steps(1) infinite; }

/* Header */
header.site {
  position: sticky; top: 0; z-index: 10;
  background: rgba(4, 8, 6, .74);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent, var(--blue), var(--red), var(--amber), transparent) 1;
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 80px; }
nav.main { display: flex; gap: 24px; align-items: center; }
nav.main a {
  color: var(--text); text-decoration: none; font-family: var(--mono); font-size: 13.5px;
  letter-spacing: .06em; text-transform: uppercase; position: relative; padding: 4px 0;
}
nav.main a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 100%;
  background: var(--blue); box-shadow: 0 0 8px var(--blue);
  transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
nav.main a:hover { color: var(--white); }
nav.main a:hover::after { transform: scaleX(1); }

/* Hero */
.hero {
  position: relative; overflow: hidden; isolation: isolate;
  padding: 120px 0 130px;
  background:
    radial-gradient(600px 380px at 82% 18%, rgba(236, 1, 1, .22), transparent 70%),
    radial-gradient(520px 360px at 8% 85%, rgba(0, 150, 255, .18), transparent 70%),
    linear-gradient(180deg, #04060c 0%, #060a14 100%);
}
.hero::before {
  content: ""; position: absolute; left: -50%; right: -50%; bottom: -40%; height: 85%; z-index: -1;
  background-image:
    linear-gradient(rgba(0, 150, 255, .45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 150, 255, .45) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(420px) rotateX(62deg);
  -webkit-mask-image: linear-gradient(to top, #000 10%, transparent 75%);
          mask-image: linear-gradient(to top, #000 10%, transparent 75%);
  animation: floor 3.5s linear infinite;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .025) 0 1px, transparent 1px 3px);
}
@keyframes floor { from { background-position: 0 0, 0 0; } to { background-position: 0 60px, 0 0; } }

.prompt {
  display: inline-block; margin-bottom: 26px; padding: 6px 14px;
  font-family: var(--mono); font-size: 13.5px; color: var(--blue);
  border: 1px solid var(--line); border-radius: 8px; background: rgba(0, 150, 255, .06);
  box-shadow: 0 0 24px rgba(0, 150, 255, .12) inset;
}
.prompt .u { color: var(--red); }
.prompt .sm { display: none; }
.hero h1 {
  font-size: clamp(36px, 5.8vw, 64px); line-height: 1.06; margin: 0 0 22px; max-width: 900px;
  font-weight: 800; letter-spacing: -.02em; text-wrap: balance;
  background: linear-gradient(100deg, #ffffff 0%, #bfe3ff 45%, #ffb0b0 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero h1 em {
  font-style: normal; color: var(--red); -webkit-text-fill-color: var(--red);
  text-shadow: 0 0 18px rgba(236, 1, 1, .7);
  animation: glitch 4s steps(1) infinite;
}
@keyframes glitch {
  0%, 92%, 100% { text-shadow: 0 0 18px rgba(236, 1, 1, .7); transform: none; }
  93% { text-shadow: -3px 0 var(--red), 3px 0 var(--blue); transform: translateX(1px); }
  95% { text-shadow: 3px 0 var(--amber), -3px 0 var(--red); transform: translateX(-2px); }
  97% { text-shadow: -1px 0 var(--red), 1px 0 var(--blue); transform: none; }
}
.hero h1::after {
  content: "_"; -webkit-text-fill-color: var(--red); color: var(--red);
  margin-left: 6px; animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero p.lead { font-size: 19.5px; max-width: 720px; margin: 0 0 36px; color: #b4c2d9; }

.btn {
  display: inline-block; padding: 14px 26px; border-radius: 12px; font-weight: 700; text-decoration: none;
  margin: 0 12px 12px 0; transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn.primary {
  color: #00101f; background: linear-gradient(90deg, var(--blue), #7cc8ff);
  box-shadow: 0 0 0 1px rgba(0, 150, 255, .6), 0 8px 30px rgba(0, 150, 255, .35);
  animation: pulse 2.8s ease-in-out infinite;
}
.btn.primary:hover { transform: translateY(-2px); color: #000; box-shadow: 0 0 0 1px var(--blue), 0 12px 40px rgba(0, 150, 255, .55); }
@keyframes pulse { 50% { box-shadow: 0 0 0 1px rgba(0, 150, 255, .9), 0 8px 44px rgba(0, 150, 255, .55); } }
.btn.ghost { color: var(--white); border: 1px solid rgba(236, 1, 1, .6); background: rgba(236, 1, 1, .08); }
.btn.ghost:hover { transform: translateY(-2px); background: rgba(236, 1, 1, .2); box-shadow: 0 0 26px rgba(236, 1, 1, .45); color: #fff; }

.trust { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; font-size: 14.5px; color: var(--muted); }
.trust span {
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: rgba(8, 12, 22, .7); backdrop-filter: blur(6px);
}
.trust b { color: var(--blue); font-family: var(--mono); }

/* Secciones */
section { padding: 96px 0; position: relative; }
section.soft { background: linear-gradient(180deg, rgba(236, 1, 1, .05), rgba(0, 150, 255, .03)); }
h2 { font-size: clamp(28px, 3.6vw, 40px); color: var(--white); margin: 0 0 12px; line-height: 1.15; letter-spacing: -.01em; }
h2::before {
  content: "// "; font-family: var(--mono); color: var(--blue); font-weight: 400; font-size: .7em;
  vertical-align: middle; text-shadow: 0 0 10px rgba(0, 150, 255, .6);
}
.sub { color: var(--muted); margin: 0 0 44px; max-width: 740px; }

/* Tarjetas */
.grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  position: relative; overflow: hidden; display: flex; flex-direction: column;
  padding: 26px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--line);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(0, 150, 255, .12) 50%, transparent 70%);
  transform: translateX(-120%); transition: transform .7s ease;
}
.card:hover, .card:focus-visible {
  transform: translateY(-6px); border-color: rgba(0, 150, 255, .55); outline: none;
  box-shadow: 0 0 0 1px rgba(0, 150, 255, .25), 0 18px 50px rgba(0, 150, 255, .14), 0 0 60px rgba(236, 1, 1, .1);
}
.card:hover::before, .card:focus-visible::before { transform: translateX(120%); }
.card h3 { margin: 0 0 8px; font-size: 19.5px; color: var(--white); transition: color .2s ease; }
.card:hover h3 { color: var(--blue); }
.card p { margin: 0; font-size: 15.5px; flex: 1; }
.card .ico { font-family: var(--mono); font-size: 26px; color: var(--blue); margin-bottom: 10px; text-shadow: 0 0 12px rgba(0, 150, 255, .6); }

/* Máquinas (bloqueadas hasta el lanzamiento) */
.machine { cursor: default; }
.machine .name { font-family: var(--mono); font-size: 20px; color: var(--white); margin: 6px 0 4px; letter-spacing: .1em; }
.machine .meta { font-family: var(--mono); font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.machine .lock { font-family: var(--mono); font-size: 13px; color: var(--amber); margin-top: 16px; }
.lvl {
  display: inline-block; align-self: flex-start; padding: 3px 10px; border-radius: 999px;
  font-family: var(--mono); font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #000;
}
.lvl.l0 { background: #7cc8ff; box-shadow: 0 0 14px rgba(0, 150, 255, .5); }
.lvl.l1 { background: #39d98a; box-shadow: 0 0 14px rgba(57, 217, 138, .45); }
.lvl.l2 { background: var(--amber); box-shadow: 0 0 14px rgba(255, 176, 32, .45); }
.lvl.l3 { background: var(--red); box-shadow: 0 0 14px rgba(236, 1, 1, .5); }

/* Terminal de ejemplo */
.term {
  margin-top: 36px; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: #020308;
  box-shadow: 0 0 50px rgba(0, 150, 255, .08);
}
.term .bar { display: flex; gap: 7px; padding: 10px 14px; background: #0b101c; border-bottom: 1px solid var(--line); }
.term .bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a3b31; display: block; }
.term .bar i:nth-child(1) { background: #ff5f57; } .term .bar i:nth-child(2) { background: #febc2e; } .term .bar i:nth-child(3) { background: #28c840; }
.term pre { margin: 0; padding: 20px 22px; font-family: var(--mono); font-size: 14px; line-height: 1.7; color: var(--text); overflow-x: auto; }
.term .p { color: var(--blue); } .term .c { color: var(--muted); } .term .f { color: var(--red); }

/* Pasos */
.steps { counter-reset: s; display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.step { position: relative; padding: 24px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line); }
.step::before {
  counter-increment: s; content: "0" counter(s);
  display: block; margin-bottom: 12px; font-family: var(--mono); font-size: 30px; font-weight: 800; line-height: 1;
  background: linear-gradient(90deg, var(--blue), var(--red)); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 10px rgba(0, 150, 255, .45));
}
.step h3 { margin: 0 0 6px; font-size: 17.5px; color: var(--white); }
.step p { margin: 0; font-size: 15px; }
.step code { font-family: var(--mono); font-size: 13px; color: var(--blue); }

/* FAQ (details/summary: sin JS) */
.faq { max-width: 820px; }
.faq details {
  border: 1px solid var(--line); border-radius: 12px; background: var(--panel); margin-bottom: 12px;
  transition: border-color .2s ease;
}
.faq details[open] { border-color: rgba(0, 150, 255, .5); }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 20px; font-weight: 700; color: var(--white);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "[+] "; font-family: var(--mono); color: var(--blue); }
.faq details[open] summary::before { content: "[-] "; color: var(--red); }
.faq details p { margin: 0; padding: 0 20px 18px; font-size: 15.5px; }

/* Comunidad / CTA final */
.cta {
  background:
    radial-gradient(500px 300px at 90% 20%, rgba(236, 1, 1, .14), transparent 70%),
    radial-gradient(600px 340px at 10% 90%, rgba(0, 150, 255, .14), transparent 70%),
    var(--bg-2);
  border-top: 1px solid var(--line); text-align: center;
}
.cta .sub { margin-left: auto; margin-right: auto; }
.soon { display: inline-block; font-family: var(--mono); font-size: 13px; color: var(--amber); border: 1px dashed rgba(255, 176, 32, .5); border-radius: 8px; padding: 6px 12px; margin-top: 8px; }

footer.site { background: #020308; color: var(--muted); font-size: 13.5px; padding: 30px 0; font-family: var(--mono); border-top: 1px solid var(--line); }
footer.site .wrap { display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; }
footer.site a { color: var(--text); text-decoration: none; margin-right: 16px; }
footer.site a:hover { color: var(--blue); }

/* Páginas legales */
.legal { padding: 56px 0 80px; }
.legal h1 { color: var(--white); font-size: 34px; margin: 0 0 24px; }
.legal h2 { font-size: 21px; margin: 30px 0 8px; }
.legal h2::before { content: ""; }
.legal p, .legal li { max-width: 760px; }

@media (max-width: 820px) {
  nav.main a.hide-sm { display: none; }
  section { padding: 64px 0; }
  .hero { padding: 80px 0 90px; }
  .prompt { font-size: 11.5px; }
}
@media (max-width: 520px) {
  .logo { font-size: 21px; }
  .br-lg { display: none; }
  .logo img { width: 38px; height: 38px; }
  nav.main { gap: 12px; }
  nav.main a:not(.keep) { display: none; }
  .prompt .lg { display: none; }
  .prompt .sm { display: inline; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}