/* =========================================================
   login.css v3.0.0 · The Coders · Acceso al Campus Virtual
   Encabezado idéntico a index.html + acceso elegante con
   marca de agua diagonal de código. Responsive (web y WebView
   de la app SemilleroTheCoders.apk).
   ========================================================= */
:root{
  --bg:#F5F9FF;--surface:#FFFFFF;--surface-2:#EDF4FD;--line:#DCE7F5;
  --navy:#0B2B52;--navy-2:#123A6B;--blue:#1E63D6;--blue-dim:#E7F0FE;
  --gold:#E8A400;--gold-soft:#d8bd7f;--muted:#5A7290;
  --ink:#0d2238;--ink-2:#122a48;
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,Consolas,monospace;
  --font-body:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100vh;display:flex;flex-direction:column;background:var(--ink-2);color:var(--navy);font-family:var(--font-body);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:#fff;color:var(--navy);padding:10px 14px;border-radius:8px}
.skip:focus{left:12px}

/* ===== ENCABEZADO (copiado de index.html) ===== */
header#siteHeader{position:sticky;top:0;z-index:50;background:rgba(245,249,255,.9);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
#siteHeader .research-ribbon{background:#102b43;color:#fff;border-top:3px solid var(--gold-soft)}
#siteHeader .nav{display:grid;grid-template-columns:1fr auto;padding:18px 24px 0;max-width:1160px;margin:0 auto;gap:0;position:relative;font-family:var(--font-body)}
#siteHeader .brand{grid-column:1;display:flex;align-items:center;gap:16px;color:#fff;font-size:28px;font-weight:700;letter-spacing:0;line-height:1.15;padding-bottom:18px;min-width:0}
#siteHeader .brand .seal{display:block;width:88px;height:58px;flex-shrink:0;border-radius:8px;border:1px solid #ffffff26;background:#fff;overflow:hidden}
#siteHeader .brand .seal img{display:block;width:100%;height:100%;object-fit:contain}
#siteHeader .brand small{display:block;font-size:10px;font-weight:500;letter-spacing:.1em;color:var(--gold-soft);margin-top:8px}
#siteHeader .brand em{display:none}
#siteHeader nav.links{grid-column:1/-1;display:grid;grid-template-columns:repeat(7,minmax(0,1fr));max-width:1108px;width:100%;margin:0 auto;border-top:1px solid #ffffff20}
#siteHeader nav.links a{display:flex;align-items:center;min-width:0;min-height:52px;padding:16px 12px;border-right:1px solid #ffffff16;color:#edf3f7;font-size:12px;line-height:1.4;font-weight:500;overflow-wrap:anywhere;transition:background .15s,color .15s}
#siteHeader nav.links a:hover,#siteHeader nav.links a:focus-visible{background:#ffffff13;color:#fff}
#siteHeader nav.links a[aria-current="page"]{background:#ffffff0c;box-shadow:inset 0 -3px var(--gold-soft)}
#siteHeader .menu-btn{display:none}
#siteHeader .nav a:focus-visible,#siteHeader .menu-btn:focus-visible{outline:3px solid var(--gold-soft);outline-offset:-3px}
.header-actions{display:flex;align-items:center;justify-content:center;gap:24px;min-height:78px;padding:4px 24px 14px;max-width:1160px;margin:0 auto}
.nav-cta{font-size:13px;font-weight:600;color:#fff;padding:10px 18px;border-radius:9px;display:inline-flex;align-items:center;gap:6px;transition:transform .15s,box-shadow .15s;background:linear-gradient(270deg,#0B2B52,#1E63D6,#4C8DF0,#123A6B);background-size:600% 600%;animation:navCtaShift 7s ease infinite;white-space:nowrap}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(30,99,214,.35)}
@keyframes navCtaShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
@media(min-width:761px) and (max-width:1100px){
  #siteHeader nav.links{grid-template-columns:repeat(4,minmax(0,1fr))}
  #siteHeader nav.links a{border-bottom:1px solid #ffffff16}
}

/* ===== ZONA DE ACCESO ===== */
.acceso{position:relative;flex:1 0 auto;overflow:hidden;isolation:isolate;
  background:
    radial-gradient(1200px 600px at 50% 45%,#17365b 0%,transparent 70%),
    linear-gradient(160deg,#0f2740 0%,var(--ink-2) 45%,#0a1c30 100%)}
/* Viñeta que oscurece los bordes y da profundidad */
.acceso::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:radial-gradient(ellipse at center,transparent 35%,rgba(5,14,26,.65) 100%)}

/* Marca de agua: código en diagonal */
.code-watermark{position:absolute;inset:0;z-index:-2;overflow:hidden;pointer-events:none;user-select:none}
.wm-track{position:absolute;left:-60%;top:-70%;width:220%;height:240%;
  transform:rotate(-28deg);column-width:300px;column-gap:56px;
  animation:wmDrift 90s linear infinite alternate}
.wm-track pre{margin:0 0 34px;break-inside:avoid;font-family:var(--font-mono);font-size:13px;line-height:1.7;white-space:pre;letter-spacing:.02em}
.wm-0{color:rgba(150,190,235,.13)}
.wm-1{color:rgba(216,189,127,.13)}
.wm-2{color:rgba(255,255,255,.09)}
.wm-3{color:rgba(76,141,240,.15)}
@keyframes wmDrift{from{transform:rotate(-28deg) translate3d(0,0,0)}to{transform:rotate(-28deg) translate3d(-120px,60px,0)}}

/* Distribución: formulario a la izquierda, logotipo centrado */
.acceso-grid{position:relative;display:grid;grid-template-columns:minmax(320px,410px) minmax(0,1fr) minmax(0,410px);align-items:center;gap:40px;max-width:1480px;min-height:calc(100vh - 230px);margin:0 auto;padding:48px 40px 56px}
.acceso-logo{grid-column:2;display:flex;justify-content:center;align-items:center}
.acceso-logo img{width:100%;max-width:720px;height:auto;
  -webkit-mask-image:radial-gradient(ellipse at center,#000 60%,transparent 73%);
  mask-image:radial-gradient(ellipse at center,#000 60%,transparent 73%)}

/* Tarjeta de acceso (vidrio esmerilado) */
.acceso-card{grid-column:1;position:relative;padding:36px 32px 30px;border-radius:20px;color:#e9f0f7;
  background:linear-gradient(180deg,rgba(18,42,72,.82),rgba(10,28,48,.86));
  border:1px solid rgba(216,189,127,.28);
  box-shadow:0 30px 70px rgba(0,0,0,.45),inset 0 1px 0 rgba(255,255,255,.06);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
.acceso-card::before{content:"";position:absolute;left:32px;right:32px;top:0;height:3px;border-radius:0 0 3px 3px;background:linear-gradient(90deg,transparent,var(--gold-soft),var(--gold),var(--gold-soft),transparent)}
.acceso-eyebrow{margin:0 0 10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--gold-soft)}
.acceso-card h1{margin:0 0 6px;font-family:var(--font-display);font-size:30px;line-height:1.15;letter-spacing:-.01em;color:#fff}
.acceso-intro{margin:0 0 22px;font-size:14px;color:#b9c9d8}
.acceso-card .error,.acceso-card .success{margin:0 0 18px;padding:11px 14px;border-radius:10px;font-size:13.5px;line-height:1.45}
.acceso-card .error{background:rgba(220,70,70,.14);border:1px solid rgba(255,120,120,.45);color:#ffd5d5}
.acceso-card .success{background:rgba(70,180,120,.14);border:1px solid rgba(120,220,160,.45);color:#d5ffe6}
.acceso-form{display:grid;gap:8px}
.acceso-form label{font-size:12.5px;font-weight:600;letter-spacing:.02em;color:#d6e2ee;margin-top:6px}
.acceso-form input{width:100%;min-height:50px;padding:12px 15px;border-radius:11px;font:inherit;font-size:16px;color:#fff;
  background:rgba(4,14,26,.55);border:1px solid rgba(160,190,220,.28);transition:border-color .15s,box-shadow .15s,background .15s}
.acceso-form input::placeholder{color:#7d93aa}
.acceso-form input:hover{border-color:rgba(160,190,220,.5)}
.acceso-form input:focus{outline:none;border-color:var(--gold-soft);background:rgba(4,14,26,.75);box-shadow:0 0 0 3px rgba(216,189,127,.22)}
.acceso-form input:-webkit-autofill{-webkit-text-fill-color:#fff;-webkit-box-shadow:0 0 0 60px #0c1f35 inset;caret-color:#fff}
.acceso-submit{margin-top:18px;min-height:52px;border:0;border-radius:12px;cursor:pointer;font:inherit;font-family:var(--font-display);font-size:16px;font-weight:700;letter-spacing:.02em;color:#10233a;
  background:linear-gradient(135deg,#f0d79a 0%,var(--gold-soft) 40%,var(--gold) 100%);
  box-shadow:0 10px 26px rgba(232,164,0,.25);transition:transform .15s,box-shadow .15s,filter .15s}
.acceso-submit:hover{transform:translateY(-1px);filter:brightness(1.05);box-shadow:0 14px 32px rgba(232,164,0,.35)}
.acceso-submit:focus-visible{outline:3px solid #fff;outline-offset:3px}
.acceso-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1)}
.acceso-action{display:flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 12px;border-radius:11px;font-size:13.5px;font-weight:600;color:#dbe6f1;border:1px solid rgba(160,190,220,.28);background:rgba(255,255,255,.03);transition:border-color .15s,background .15s,color .15s;text-align:center}
.acceso-action span{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;font-family:var(--font-mono);font-size:13px;color:var(--ink);background:var(--gold-soft)}
.acceso-action:hover,.acceso-action:focus-visible{border-color:var(--gold-soft);background:rgba(216,189,127,.08);color:#fff}
.acceso-action:focus-visible{outline:3px solid var(--gold-soft);outline-offset:2px}

.acceso-foot{padding:16px 20px;text-align:center;font-family:var(--font-mono);font-size:12px;color:#8ea4ba;background:#081726;border-top:1px solid rgba(216,189,127,.18)}

/* v3.1: formulario más arriba (botones visibles sin desplazar) y logo a todo el ancho de su zona en escritorio */
@media(min-width:861px){
  .acceso-grid{grid-template-columns:minmax(320px,390px) minmax(0,1fr);align-items:start;gap:44px;min-height:0;max-width:none;padding:22px 40px 28px}
  .acceso-logo{grid-column:2/-1;align-self:center;height:100%}
  .acceso-logo img{width:100%;max-width:none;height:auto;
    -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%),linear-gradient(180deg,transparent 0,#000 8%,#000 92%,transparent 100%);
    -webkit-mask-composite:source-in;
    mask-image:linear-gradient(90deg,transparent 0,#000 6%,#000 94%,transparent 100%),linear-gradient(180deg,transparent 0,#000 8%,#000 92%,transparent 100%);
    mask-composite:intersect}
  .acceso-card{padding:24px 28px 22px}
  .acceso-card::before{left:28px;right:28px}
  .acceso-eyebrow{margin-bottom:6px}
  .acceso-card h1{font-size:26px}
  .acceso-intro{margin-bottom:12px}
  .acceso-form{gap:5px}
  .acceso-form label{margin-top:4px}
  .acceso-form input{min-height:44px;padding:10px 14px}
  .acceso-submit{margin-top:12px;min-height:48px}
  .acceso-actions{margin-top:14px;padding-top:14px}
  .acceso-action{min-height:42px;padding:8px 10px}
}
@media(min-width:861px) and (max-height:820px){
  .header-actions{min-height:60px;padding:2px 24px 8px}
}

/* ===== RESPONSIVE ===== */
@media(max-width:1240px){
  .acceso-grid{grid-template-columns:minmax(320px,400px) minmax(0,1fr);gap:36px;padding:44px 32px 52px}
}
@media(max-width:860px){
  .acceso-grid{grid-template-columns:minmax(0,1fr);gap:22px;min-height:0;padding:28px 18px 40px;max-width:560px}
  .acceso-logo{grid-column:1;grid-row:1}
  .acceso-logo img{max-width:460px}
  .acceso-card{grid-column:1;grid-row:2}
  .wm-track{column-width:240px}
  .wm-track pre{font-size:12px}
}
@media(max-width:760px){
  #siteHeader .nav{display:grid;padding:14px 13px 0}
  #siteHeader .brand{font-size:22px;gap:11px;padding-bottom:14px}
  #siteHeader .brand .seal{width:64px;height:48px}
  #siteHeader .brand small{font-size:8px;letter-spacing:.055em;margin-top:6px}
  #siteHeader .menu-btn{display:block;grid-column:2;grid-row:1;align-self:start;margin:0 0 14px 6px;min-width:70px;min-height:46px;padding:10px 16px;background:#ffffff0c;border:1px solid #ffffff35;border-radius:10px;color:#fff;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
  #siteHeader nav.links{display:none;grid-template-columns:minmax(0,1fr);padding:7px 0 13px;max-height:60vh;overflow-y:auto}
  #siteHeader nav.links.open{display:grid}
  #siteHeader nav.links a{min-height:44px;padding:10px 12px;border-right:0;border-bottom:1px solid #ffffff12;font-size:13px}
  #siteHeader nav.links a[aria-current="page"]{box-shadow:inset 3px 0 var(--gold-soft)}
  .header-actions{min-height:64px;padding:3px 16px 12px}
  .nav-cta{white-space:normal;text-align:center;justify-content:center;line-height:1.25}
}
@media(max-width:480px){
  .acceso-grid{padding:20px 14px 32px}
  .acceso-card{padding:28px 20px 22px;border-radius:16px}
  .acceso-card::before{left:20px;right:20px}
  .acceso-card h1{font-size:25px}
  .acceso-actions{grid-template-columns:1fr}
  .acceso-logo img{max-width:100%}
}
@media(max-width:360px){
  #siteHeader .brand{font-size:19px;gap:8px}
  #siteHeader .brand .seal{width:50px;height:40px}
  #siteHeader .brand small{font-size:7px;letter-spacing:0}
}
@media(prefers-reduced-motion:reduce){
  .wm-track{animation:none}
  .nav-cta{animation:none;background:var(--navy)}
  .acceso-submit,.acceso-submit:hover{transition:none;transform:none}
}