@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700;800;900&family=Spline+Sans+Mono:wght@400;500;600&display=swap');

:root{
  --tinta:#0B1512;        /* verde casi negro */
  --pizarra:#14201C;
  --niebla:#8FA39B;       /* verde grisáceo */
  --hueso:#F3F0E7;        /* crema cálido pero verdoso */
  --jade:#00C896;         /* el acento vivo de Centinela */
  --jade-oscuro:#00A87D;
  --ambar:#E8A33D;        /* alertas / contraste */
  --rojo:#F07167;
  --linea:rgba(143,163,155,0.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Archivo',sans-serif;
  background:var(--tinta);
  color:var(--hueso);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--jade)}
.mono{font-family:'Spline Sans Mono',monospace}
.wrap{max-width:1100px;margin:0 auto;padding:0 28px}
[hidden]{display:none!important}

/* ── NAV ── */
nav{
  position:sticky;top:0;z-index:50;
  background:rgba(11,21,18,0.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--linea);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-0.02em}
.logo img{border-radius:7px}
.logo b{color:var(--jade);font-weight:inherit}
.nav-acciones{display:flex;align-items:center;gap:10px}
.nav-cta{font-size:14px;font-weight:600;color:var(--tinta);
  background:var(--jade);border:none;padding:10px 18px;border-radius:8px;cursor:pointer;text-decoration:none;
  transition:transform .15s;white-space:nowrap}
.nav-cta:hover{transform:translateY(-1px)}
.nav-login{font-size:14px;font-weight:600;color:var(--hueso);
  text-decoration:none;padding:10px 8px;transition:color .15s;white-space:nowrap}
.nav-login:hover{color:var(--jade)}

/* ── HERO ── */
.hero{padding:88px 0 64px;position:relative}
.eyebrow{font-family:'Spline Sans Mono';font-size:13px;color:var(--jade);letter-spacing:0.04em;
  text-transform:uppercase;margin-bottom:22px;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--jade)}
h1{font-size:clamp(38px,6.5vw,68px);line-height:1.02;font-weight:900;letter-spacing:-0.03em;margin-bottom:24px}
h1 .hl{color:var(--jade);white-space:nowrap}
.lead{font-size:clamp(17px,2.2vw,21px);color:var(--niebla);max-width:620px;margin-bottom:36px;line-height:1.55}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn-primary{font-size:16px;font-weight:700;color:var(--tinta);
  background:var(--jade);border:none;padding:16px 30px;border-radius:10px;cursor:pointer;text-decoration:none;
  transition:transform .15s,box-shadow .15s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,200,150,0.25)}
.btn-ghost{font-size:14px;color:var(--niebla);text-decoration:none;padding:16px 8px;transition:color .15s}
.btn-ghost:hover{color:var(--hueso)}

/* ── Terminal de muestra ── */
.demo{margin-top:64px;background:var(--pizarra);border:1px solid var(--linea);border-radius:14px;
  overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,0.4)}
.demo-bar{display:flex;align-items:center;gap:7px;padding:13px 18px;border-bottom:1px solid var(--linea)}
.dot{width:11px;height:11px;border-radius:50%}
.demo-title{font-size:12px;color:var(--niebla);margin-left:12px}
.demo-body{padding:26px 24px;font-family:'Spline Sans Mono',monospace;font-size:14px;line-height:1.9;overflow-x:auto}
.demo-body .sep{height:10px}
.demo-body .q{color:var(--niebla)}
.demo-body .a{color:var(--hueso)}
.demo-body .flag{color:var(--ambar)}
.demo-body .good{color:var(--jade)}
.cursor{display:inline-block;width:8px;height:15px;background:var(--jade);vertical-align:middle;
  animation:blink 1.1s steps(2) infinite;margin-left:2px}
@keyframes blink{0%,50%{opacity:1}50.01%,100%{opacity:0}}

/* ── SECCIONES ── */
section{padding:80px 0}
.sec-label{font-size:12px;color:var(--jade);text-transform:uppercase;letter-spacing:0.08em;margin-bottom:16px}
h2{font-size:clamp(28px,4vw,42px);font-weight:800;letter-spacing:-0.02em;line-height:1.1;margin-bottom:20px;max-width:720px}
.sec-lead{font-size:18px;color:var(--niebla);max-width:640px;margin-bottom:48px}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.card{background:var(--pizarra);border:1px solid var(--linea);border-radius:14px;padding:28px;
  transition:border-color .2s,transform .2s}
.card:hover{border-color:rgba(0,200,150,0.4);transform:translateY(-3px)}
.card-n{font-size:13px;color:var(--jade);margin-bottom:14px}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px;letter-spacing:-0.01em}
.card p{font-size:14.5px;color:var(--niebla);line-height:1.6}

.split{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--linea);border-radius:14px;overflow:hidden}
.split-col{padding:34px 30px}
.split-col:first-child{border-right:1px solid var(--linea);background:rgba(143,163,155,0.03)}
.split-h{font-size:12px;text-transform:uppercase;letter-spacing:0.06em;margin-bottom:20px}
.split-col:first-child .split-h{color:var(--niebla)}
.split-col:last-child .split-h{color:var(--jade)}
.split-item{display:flex;gap:12px;padding:11px 0;font-size:15px;border-bottom:1px solid var(--linea)}
.split-item:last-child{border-bottom:none}
.split-item .ico{flex-shrink:0}
.split-col:first-child .split-item{color:var(--niebla)}

/* ── CREAR CUENTA ── */
.alta{background:linear-gradient(160deg,var(--pizarra),var(--tinta));border:1px solid var(--linea);
  border-radius:20px;padding:48px 44px;display:grid;grid-template-columns:1fr 1fr;gap:48px;
  position:relative;overflow:hidden;align-items:start}
.alta::before{content:"";position:absolute;top:-40%;right:-10%;width:340px;height:340px;
  background:radial-gradient(circle,rgba(0,200,150,0.14),transparent 70%);pointer-events:none}
.tag{display:inline-block;font-size:12px;color:var(--jade);
  border:1px solid rgba(0,200,150,0.35);border-radius:100px;padding:6px 16px;margin-bottom:22px;letter-spacing:0.04em}
.alta-intro h2{font-size:clamp(28px,4vw,40px);margin-bottom:16px}
.alta-intro p{color:var(--niebla);font-size:16.5px;margin-bottom:22px}
.alta-puntos{list-style:none;display:flex;flex-direction:column;gap:10px}
.alta-puntos li{font-size:14.5px;color:var(--hueso);padding-left:22px;position:relative}
.alta-puntos li::before{content:"◆";color:var(--jade);position:absolute;left:0;font-size:11px;top:3px}

.form-alta{display:flex;flex-direction:column;gap:14px;position:relative;z-index:1}
.campo{display:flex;flex-direction:column;gap:6px;min-width:0}
.campo label{font-size:13px;font-weight:600;color:var(--hueso)}
.campo .opc{color:var(--niebla);font-weight:400}
.fila-2{display:grid;grid-template-columns:1.6fr 1fr;gap:12px}
.form-alta input,.form-alta select{width:100%;font-family:'Archivo',sans-serif;font-size:15px;padding:13px 14px;
  background:var(--tinta);border:1px solid var(--linea);border-radius:10px;color:var(--hueso);outline:none;
  transition:border-color .15s}
.form-alta select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--niebla) 50%),linear-gradient(135deg,var(--niebla) 50%,transparent 50%);
  background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px;background-repeat:no-repeat;padding-right:34px}
.form-alta input:focus,.form-alta select:focus{border-color:var(--jade)}
.form-alta input[aria-invalid="true"]{border-color:var(--rojo)}
.ayuda{font-size:12px;color:var(--niebla)}
.trampa{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.acepto{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--niebla);cursor:pointer;line-height:1.45}
.acepto input{width:18px;height:18px;flex-shrink:0;margin-top:1px;accent-color:var(--jade);cursor:pointer}
.alta-error{background:rgba(240,113,103,0.1);border:1px solid rgba(240,113,103,0.45);color:#FFB4AC;
  border-radius:10px;padding:11px 14px;font-size:14px}
#btn-alta{font-family:'Archivo',sans-serif;font-size:16px;font-weight:700;color:var(--tinta);background:var(--jade);
  border:none;padding:15px 28px;border-radius:10px;cursor:pointer;transition:transform .15s,opacity .15s}
#btn-alta:hover{transform:translateY(-2px)}
#btn-alta:disabled{opacity:.6;cursor:wait;transform:none}
.form-nota{font-size:12px;color:var(--niebla);text-align:center}
.alta-cerrada{position:relative;z-index:1;background:var(--tinta);border:1px solid var(--linea);border-radius:14px;padding:28px}
.cerrada-titulo{font-size:20px;font-weight:800;margin-bottom:8px}
.alta-cerrada p{color:var(--niebla);font-size:15px}

/* ── FOOTER ── */
footer{border-top:1px solid var(--linea);padding:38px 0;margin-top:40px}
.foot-in{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;
  font-size:13px;color:var(--niebla);font-family:'Spline Sans Mono',monospace}
.foot-links{display:flex;gap:18px}
.foot-links a{color:var(--niebla);text-decoration:none}
.foot-links a:hover{color:var(--hueso)}

@media(max-width:860px){
  .alta{grid-template-columns:1fr;gap:32px;padding:40px 28px}
}
@media(max-width:680px){
  .wrap{padding:0 16px}
  .split{grid-template-columns:1fr}
  .split-col:first-child{border-right:none;border-bottom:1px solid var(--linea)}
  .hero{padding:56px 0 40px}
  section{padding:56px 0}
  .alta{padding:30px 18px}
  .nav-cta{padding:9px 14px}
  .logo{font-size:17px}
}
@media(max-width:380px){
  .fila-2{grid-template-columns:1fr}
  .nav-login{padding:10px 2px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}