/* === Pantallas de acceso HorizonTED (login, registro, activar, ingresar) ===
   La misma noche violeta de la landing. El panel de marca es un circuito por
   el que viajan señales y una consola que escribe lo que los alumnos le piden
   a la IA (ver /js/acceso-fx.js). El formulario se queda quieto y claro.
   Público sin sesión: server.js lo sirve antes del guardián de autenticación. */
:root{
  --night:#0B0716; --night-2:#160D29; --lilac:#C084FC; --lilac-ink:#D8B4FE;
  --act:#9C27B0; --act-hover:#7B1FA2; --brand:#E11D2A;
  --ink:#1A1530; --ink-2:#55506B; --line:#DED8EA; --field:#F7F5FB;
  --ok:#10B981; --ok-ink:#059669;
  --ease:cubic-bezier(.23,1,.32,1);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased}
html{background:var(--night);overflow-x:clip}
body.hz-app{
  font-family: var(--hz-font, 'IBM Plex Sans', 'Segoe UI', system-ui, Arial, sans-serif);
  background:var(--night);
  min-height:100vh;min-height:100dvh;
  display:flex;align-items:center;justify-content:center;
  overflow-x:hidden;overflow-y:auto;
  position:relative;
}
/* Resplandor de fondo: deriva lenta, casi imperceptible */
body::before{
  content:'';position:fixed;inset:0;pointer-events:none;
  background:
    radial-gradient(40% 35% at 20% 30%, rgba(156,39,176,.28), transparent 70%),
    radial-gradient(35% 30% at 80% 75%, rgba(192,132,252,.16), transparent 70%);
  animation:drift 22s ease-in-out infinite alternate;
  transition:filter .5s var(--ease);
}
body.pin-mode::before{filter:hue-rotate(-140deg) saturate(.9)}
@keyframes drift{from{transform:scale(1.25)}to{transform:scale(1.25) translate3d(4%,-3%,0) rotate(6deg)}}

.login-wrap{
  position:relative;z-index:1;
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  width:100%;max-width:940px;min-height:560px;margin:24px;
  border-radius:16px;overflow:hidden;
  border:1px solid rgba(192,132,252,.18);
  box-shadow:0 30px 80px -20px rgba(0,0,0,.6);
  animation:rise .7s var(--ease) both;
}
@keyframes rise{from{opacity:0;transform:translateY(14px) scale(.985)}}

/* ── Panel de marca ── */
.brand-panel{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(165deg,var(--night-2) 0%,var(--night) 100%);
  padding:40px 40px 32px;
  display:flex;flex-direction:column;gap:22px;
}
#circuit{position:absolute;inset:0;width:100%;height:100%;opacity:.9;pointer-events:none}
.brand-panel > *:not(canvas){position:relative;z-index:1}
.brand-top{display:flex;align-items:center;gap:14px}
.brand-logo img{height:44px;background:#fff;border-radius:8px;padding:4px 10px;display:block}
.brand-title{font-size:1.35rem;font-weight:700;letter-spacing:-.02em;line-height:1}
.brand-title b{color:var(--brand);font-weight:700}
.brand-sub{display:block;font-size:.78rem;font-weight:500;color:rgba(255,255,255,.62);margin-top:5px;letter-spacing:0}

.brand-head{margin-top:auto}
.brand-head h1{
  font-size:clamp(1.65rem,2.6vw,2.15rem);font-weight:700;line-height:1.08;
  letter-spacing:-.03em;max-width:15ch;text-wrap:balance;
}
.brand-head h1 span{color:var(--lilac)}
.brand-desc{color:rgba(255,255,255,.72);font-size:.9rem;line-height:1.6;margin-top:12px;max-width:38ch}

/* Consola: lo que un alumno le pide a la IA, y lo que comprueba */
.console{
  border:1px solid rgba(192,132,252,.22);border-radius:12px;
  background:rgba(11,7,22,.72);backdrop-filter:blur(6px);
  padding:14px 16px;font-size:.84rem;line-height:1.55;min-height:118px;
}
.console-bar{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.55);font-size:.74rem;margin-bottom:10px}
.console-bar .dot{width:7px;height:7px;border-radius:50%;background:var(--lilac);box-shadow:0 0 0 0 rgba(192,132,252,.6);animation:ping 2s var(--ease) infinite}
@keyframes ping{70%{box-shadow:0 0 0 7px rgba(192,132,252,0)}100%{box-shadow:0 0 0 0 rgba(192,132,252,0)}}
.console-q{color:#fff;display:flex;gap:8px}
.console-q svg,.console-a svg{flex-shrink:0;margin-top:3px}
.console-q svg{color:var(--lilac)}
.caret{display:inline-block;width:2px;height:1em;background:var(--lilac);vertical-align:-2px;margin-left:1px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.console-a{color:#86EFAC;display:flex;gap:8px;margin-top:8px;opacity:0;transform:translateY(4px);transition:opacity .35s var(--ease),transform .35s var(--ease)}
.console-a.on{opacity:1;transform:none}
body.pin-mode .console-bar .dot{background:var(--ok)}

.brand-tags{display:flex;flex-wrap:wrap;gap:6px}
.brand-tag{border:1px solid rgba(255,255,255,.16);color:rgba(255,255,255,.8);padding:4px 10px;border-radius:999px;font-size:.74rem;font-weight:500}

/* ── Panel del formulario ── */
.form-panel{
  background:#fff;padding:48px 44px;
  display:flex;flex-direction:column;justify-content:center;
}
.form-header{margin-bottom:26px}
.form-header h2{font-size:1.5rem;font-weight:700;color:var(--ink);letter-spacing:-.02em;transition:color .3s var(--ease)}
.form-header p{font-size:.9rem;color:var(--ink-2);line-height:1.55;margin-top:6px}
.form-header .swap{animation:swap .35s var(--ease)}
@keyframes swap{from{opacity:0;transform:translateY(4px)}}

label{display:block;color:var(--ink);font-size:.84rem;font-weight:600;margin-bottom:7px}
.form-group{margin-top:16px;overflow:hidden;transition:opacity .3s var(--ease),max-height .3s var(--ease),margin-top .3s var(--ease)}
.form-group:first-of-type{margin-top:0}

input{
  width:100%;background:var(--field);border:1.5px solid var(--line);
  border-radius:10px;padding:13px 15px;color:var(--ink);font-size:1rem;
  outline:none;font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
input:focus{border-color:var(--act);box-shadow:0 0 0 4px rgba(156,39,176,.13);background:#fff}
input::placeholder{color:#8A84A0}
input[readonly]{color:var(--ink-2);background:#F1EFF5}
body.pin-mode input:focus{border-color:var(--ok);box-shadow:0 0 0 4px rgba(16,185,129,.15)}

.slide-hide{max-height:0;opacity:0;margin-top:0 !important;padding-top:0;padding-bottom:0;border:none}
.slide-show{max-height:120px;opacity:1}

.btn{
  position:relative;overflow:hidden;
  width:100%;min-height:50px;padding:14px;border:none;border-radius:10px;
  background:var(--act);display:flex;justify-content:center;align-items:center;gap:8px;
  color:#fff;font-size:1rem;font-weight:600;cursor:pointer;margin-top:22px;font-family:inherit;
  transition:background-color .2s var(--ease),transform .16s var(--ease);
}
/* Un barrido de luz al pasar: confirma que el botón está vivo */
.btn::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(105deg,transparent 35%,rgba(255,255,255,.22) 50%,transparent 65%);
  transform:translateX(-100%);
}
@media (hover:hover) and (pointer:fine){
  .btn:hover{background:var(--act-hover)}
  .btn:hover::after{transform:translateX(100%);transition:transform .7s var(--ease)}
  body.pin-mode .btn:hover{background:var(--ok-ink)}
}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
body.pin-mode .btn{background:var(--ok)}
.btn-arrow{transition:transform .2s var(--ease)}
.btn:hover .btn-arrow{transform:translateX(3px)}
.btn.loading .btn-arrow{display:none}

.error{
  background:#FDECEC;border:1px solid #F5C2C2;color:#B71C1C;
  border-radius:8px;padding:10px 14px;font-size:.88rem;margin-top:14px;display:none;text-align:center;
}
.notice{background:#ECFDF5;border:1px solid #A7F3D0;color:#065F46;border-radius:8px;padding:10px 14px;font-size:.88rem;margin-top:14px;text-align:center;display:none}
.hint{color:var(--ink-2);font-size:.86rem;text-align:center;margin-top:22px}
.hint a{color:var(--act);font-weight:600;text-decoration:none}
.hint a:hover{text-decoration:underline}
.spinner{display:none;width:17px;height:17px;border:2.5px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.btn.loading .spinner{display:inline-block}
.btn.loading .btn-text{display:none}

*:focus-visible{outline:2px solid var(--act);outline-offset:2px}
.brand-panel *:focus-visible{outline-color:var(--lilac)}

@media (max-width:760px){
  body{align-items:flex-start;padding:16px 0}
  .login-wrap{grid-template-columns:1fr;max-width:440px;min-height:0;margin:0 16px}
  .brand-panel{padding:24px 22px 22px;gap:16px}
  .brand-head h1{font-size:1.45rem}
  .brand-desc,.brand-tags{display:none}
  .console{min-height:96px;font-size:.8rem}
  .form-panel{padding:28px 22px 32px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .caret{display:none}
}

/* ── Piezas que usan registro, activar e ingresar ── */
.consent{display:flex;align-items:flex-start;gap:10px;margin-top:18px;color:var(--ink-2);font-size:.86rem;line-height:1.5;font-weight:400;cursor:pointer;-webkit-user-select:none;user-select:none}
.consent input{width:18px;height:18px;flex-shrink:0;margin-top:2px;padding:0;accent-color:var(--act);cursor:pointer}
.consent a{color:var(--act);font-weight:600;text-decoration:none}
.consent a:hover{text-decoration:underline}

.panel-ok{border:1px solid #A7F3D0;background:#ECFDF5;color:#065F46;border-radius:12px;padding:24px;text-align:center;line-height:1.55}
.panel-ok h3{font-size:1.15rem;font-weight:700;margin-bottom:8px;color:#064E3B}
.panel-ok p{font-size:.92rem;margin-bottom:16px}
.panel-ok .btn{margin-top:0;text-decoration:none}
.panel-ok-icon{width:44px;height:44px;border-radius:50%;background:var(--ok);color:#fff;display:grid;place-items:center;margin:0 auto 12px;animation:pop .5s var(--ease) both}
@keyframes pop{from{transform:scale(.6);opacity:0}}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:18px}
.chip{background:var(--ok);color:#fff;font-weight:600;font-size:.8rem;padding:5px 12px;border-radius:999px}

.panel-aviso{border:1px solid var(--line);background:var(--field);border-radius:12px;padding:20px}
.panel-aviso h3{font-size:1.05rem;font-weight:700;color:var(--ink);margin-bottom:6px}
.panel-aviso p{font-size:.9rem;color:var(--ink-2);line-height:1.55;margin-bottom:14px}
.btn-row{display:flex;gap:10px}
.btn-row .btn{margin-top:0;text-decoration:none}
.btn--sec{background:#fff;color:var(--act);border:1.5px solid var(--act)}
@media (hover:hover) and (pointer:fine){.btn--sec:hover{background:#F6EEF9;color:var(--act-hover)}}
.btn--sec::after{display:none}

.paso-hint{font-size:.9rem;color:var(--ink);line-height:1.55;background:var(--field);border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:16px;display:flex;gap:10px;align-items:flex-start}
.paso-hint svg{flex-shrink:0;margin-top:2px;color:var(--act)}
.paso-hint.nuevo{background:#ECFDF5;border-color:#A7F3D0}
.paso-hint.nuevo svg{color:var(--ok-ink)}
.btn-link{background:none;border:none;color:var(--ink-2);font:inherit;font-size:.86rem;cursor:pointer;margin-top:14px;padding:6px;text-decoration:underline;text-underline-offset:3px}
.btn-link:hover{color:var(--act)}
.input-codigo{font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:1.15rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;text-align:center}
.input-codigo::placeholder{font-family:var(--hz-font,'IBM Plex Sans',sans-serif);font-size:.95rem;font-weight:400;letter-spacing:0;text-transform:none}
.input-clave{font-size:1.4rem;font-weight:700;letter-spacing:.35em;text-align:center}
.input-clave::placeholder{font-size:.95rem;letter-spacing:0;font-weight:400}
.step2-block{display:none}
.step2-block.visible{display:block}