/* ====== Variables y base ====== */
:root{
  --bg:#0b1220;          /* fondo general */
  --bg-alt:#0f172a;      /* secciones alternas / cards */
  --ink:#e5e7eb;         /* texto principal */
  --mut:#94a3b8;         /* texto secundario */
  --line:#1f2937;        /* bordes sutiles */
  --pri:#22d3ee;         /* acento 1 */
  --sec:#a78bfa;         /* acento 2 */
  --ok:#34d399;
  --err:#ef4444;

  --rad:16px;            /* radio base */
  --pad:18px;            /* padding base */
  --cmax:1100px;         /* ancho contenedor */
  --sh1:0 6px 20px rgba(0,0,0,.25);
  --sh0:0 1px 0 rgba(255,255,255,.05) inset, 0 1px 12px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(167,139,250,.12), transparent 60%),
    radial-gradient(900px 500px at 0% 10%, rgba(34,211,238,.10), transparent 60%),
    linear-gradient(180deg,#070b14,#0b1220 40%,#0b1220);
  letter-spacing:.2px;
}
img,svg{display:block;max-width:100%}
a{color:inherit}

/* ====== Utilidades de layout ====== */
.c{max-width:var(--cmax);margin-inline:auto;padding:0 20px}
.grid2{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.sec{padding:84px 0}
.sec.alt{background:rgba(255,255,255,.02);border-block:1px solid var(--line)}
.h2{font-size:clamp(1.6rem,2.2vw,2rem);margin:0 0 14px}
.lead{color:#cbd5e1;max-width:65ch}
.muted{color:var(--mut)}
.grad{background:linear-gradient(90deg,var(--pri),var(--sec));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ====== Barra superior ====== */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(11,18,32,.7);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:box-shadow .25s ease, background .25s ease;
}
.topbar.scrolled{box-shadow:var(--sh1);background:rgba(11,18,32,.85)}
.topbar .c{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}
.nav{display:flex;gap:22px;align-items:center}
.nav a{
  text-decoration:none;opacity:.85;position:relative;padding:6px 2px;transition:.2s ease
}
.nav a:hover{opacity:1}
.nav a.active{
  opacity:1;font-weight:600;
}
.nav a.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;
  background:linear-gradient(90deg,var(--pri),var(--sec));
  border-radius:999px;
}
.btn-menu{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer}
.btn-menu span{width:22px;height:2px;background:var(--ink);display:block}

/* ====== Hero ====== */
.hero{padding:110px 0 84px}
.hero__txt h1{font-size:clamp(2rem,4.2vw,3.2rem);line-height:1.1;margin:0 0 12px}
.hero__cta{display:flex;gap:12px;margin:18px 0 10px;flex-wrap:wrap}
.badges{display:flex;flex-wrap:wrap;gap:10px;padding:0;margin:18px 0 0;list-style:none}
.badges li{
  padding:6px 10px;border:1px solid var(--line);border-radius:999px;color:#cbd5e1;
  background:linear-gradient(180deg,#0b1220,#0d1425);
}
.hero__img{display:grid;gap:16px}
.mock{border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;box-shadow:var(--sh0)}
.stat{
  background:linear-gradient(180deg,#0b1220,#0e1628);
  border:1px solid var(--line);border-radius:var(--rad);padding:var(--pad);
}
.stat__num{margin:0;font-size:1.2rem}
.stat__txt{margin:6px 0 0;color:#cbd5e1}

/* ====== Cards ====== */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:18px}
.cards--3{grid-template-columns:repeat(3,1fr)}
.card{
  background:linear-gradient(180deg,#0b1220,#0d1425);
  border:1px solid var(--line);border-radius:var(--rad);padding:var(--pad);
  transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh1);
  border-color:rgba(167,139,250,.45);
}
.card h3{margin:6px 0 8px;font-size:1.05rem}
.card p{margin:0;color:#cbd5e1}

/* ====== Timeline ====== */
.tl{list-style:none;padding:0;margin:12px 0 0;display:grid;gap:16px;position:relative}
.tl li{
  background:linear-gradient(180deg,#0b1220,#0d1425);
  border:1px solid var(--line);border-radius:var(--rad);padding:var(--pad);
}
.tl__dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(90deg,var(--pri),var(--sec));display:inline-block;margin-right:8px}
.tl__cnt h3{margin:0 0 6px;font-size:1.05rem}

/* ====== Formulario ====== */
.frm{display:grid;gap:12px;max-width:680px}
.grp{display:grid;gap:6px}
.grp input,.grp textarea{
  width:100%;padding:12px 14px;border-radius:12px;border:1px solid var(--line);
  background:#0c1426;color:var(--ink);transition:border-color .2s ease, box-shadow .2s ease;
}
.grp input:focus,.grp textarea:focus{
  outline:none;border-color:rgba(34,211,238,.6);
  box-shadow:0 0 0 3px rgba(34,211,238,.15);
}
.frm__actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.ok{color:var(--ok)}

/* ====== Botones ====== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:10px 14px;border-radius:12px;border:1px solid var(--line);
  text-decoration:none;color:var(--ink);transition:transform .15s ease, box-shadow .15s ease, opacity .2s ease, background .2s ease;
}
.btn:active{transform:translateY(1px)}
.btn--pri{
  background:linear-gradient(90deg,var(--pri),var(--sec));border:0;color:#06111f;font-weight:800;
  box-shadow:0 1px 0 rgba(255,255,255,.15) inset, 0 8px 24px rgba(167,139,250,.25);
}
.btn--pri:hover{opacity:.95}
.btn--sec{background:transparent}
.cta--nav{padding:8px 12px;border-color:transparent;background:rgba(255,255,255,.06);border-radius:999px}

/* ====== Footer ====== */
.foot{padding:28px 0;border-top:1px solid var(--line)}
.foot__grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:12px;align-items:center}
.foot__links{display:flex;gap:14px}
.foot__copy{color:var(--mut);text-align:right}

/* ====== Efectos reveal (usados por main.js) ====== */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.in{opacity:1;transform:none;transition:opacity .6s ease, transform .6s ease}

/* ====== Accesibilidad (toggle desde JS con .using-kbd) ====== */
.using-kbd :focus{outline:2px solid var(--pri);outline-offset:2px}

/* ====== Responsivo ====== */
@media (max-width: 1080px){
  .cards{grid-template-columns:repeat(3,1fr)}
}
@media (max-width: 960px){
  .grid2{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .cards--3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 680px){
  .nav{
    display:none;position:absolute;inset:68px 0 auto 0;background:#0b1220;
    border-bottom:1px solid var(--line);padding:12px 20px;box-shadow:var(--sh1)
  }
  .nav a{padding:10px 0;display:block}
  .btn-menu{display:flex}
  .cards,.cards--3{grid-template-columns:1fr}
  .foot__grid{grid-template-columns:1fr}
  .foot__copy{text-align:left}
}

/* ====== Reduce motion (preferencias del usuario) ====== */
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}