/* ==========================================================================
   CTF Ciclo 1 — tema «neón cibernético»
   Sin fuentes ni recursos externos (CSP estricta: solo 'self').
   ========================================================================== */
:root {
  --bg: #06080f;
  --bg-2: #0b0f1d;
  --vidrio: rgba(255, 255, 255, .035);
  --vidrio-2: rgba(255, 255, 255, .06);
  --borde: rgba(255, 255, 255, .09);
  --borde-2: rgba(255, 255, 255, .16);
  --texto: #e9ecff;
  --tenue: #8c94b8;
  --violeta: #8b5cf6;
  --cian: #22d3ee;
  --rosa: #f472b6;
  --verde: #34d399;
  --rojo: #fb7185;
  --ambar: #fbbf24;
  --azul: #60a5fa;
  --grad: linear-gradient(135deg, #8b5cf6 0%, #6366f1 45%, #22d3ee 100%);
  --grad-texto: linear-gradient(90deg, #c4b5fd, #67e8f9 60%, #f0abfc);
  --sombra: 0 10px 40px -12px rgba(0, 0, 0, .7);
  --brillo: 0 0 0 1px rgba(139, 92, 246, .35), 0 8px 30px -6px rgba(139, 92, 246, .45);
  --radio: 16px;
  --sans: "Inter", "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", "Fira Code", ui-monospace, "SFMono-Regular", Consolas, monospace;
}

/* Colores por categoría */
.linux     { --cat: #22d3ee; }
.cripto    { --cat: #a78bfa; }
.web       { --cat: #60a5fa; }
.forense   { --cat: #fbbf24; }
.osint     { --cat: #f472b6; }
.reversing { --cat: #34d399; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: var(--bg); color: var(--texto); font-family: var(--sans); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
/* Fondo: cuadrícula + brillos que se mueven lentamente */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(139, 92, 246, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 92, 246, .07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}
body::after {
  content: ""; position: fixed; inset: -20%; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40% 35% at 15% 10%, rgba(139, 92, 246, .22), transparent 70%),
    radial-gradient(35% 30% at 85% 15%, rgba(34, 211, 238, .16), transparent 70%),
    radial-gradient(30% 30% at 60% 90%, rgba(244, 114, 182, .10), transparent 70%);
  animation: flotar 22s ease-in-out infinite alternate;
}
@keyframes flotar { to { transform: translate3d(3%, 4%, 0) rotate(4deg); } }

a { color: var(--cian); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 0 0 .5rem; }
h2 { font-size: 1.35rem; margin: 2.2rem 0 1rem; }
code, pre, kbd { font-family: var(--mono); }
code { background: rgba(139, 92, 246, .14); color: #d8ccff; padding: .12em .45em; border-radius: 6px; font-size: .88em; }
pre { background: #05060c; border: 1px solid var(--borde); color: #a7f3d0; padding: .9rem 1rem; border-radius: 12px; overflow-x: auto; }
.grad { background: var(--grad-texto); -webkit-background-clip: text; background-clip: text; color: transparent; }
.tenue, .mini { color: var(--tenue); }
.mini { font-size: .875rem; }
.oculto { display: none !important; }
:focus-visible { outline: 2px solid var(--cian); outline-offset: 2px; border-radius: 6px; }

/* ----------------------------------------------------------------- barra */
.barra {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: .75rem clamp(1rem, 4vw, 2.5rem);
  background: rgba(6, 8, 15, .72); backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--borde);
}
.logo { display: flex; align-items: center; gap: .6rem; color: var(--texto); font-weight: 800; letter-spacing: -.01em; }
.logo:hover { text-decoration: none; }
.logo-marca {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--grad); box-shadow: 0 0 20px rgba(139, 92, 246, .55); font-size: 1rem;
}
.logo small { display: block; font: 600 .68rem/1 var(--mono); color: var(--tenue); letter-spacing: .12em; }
nav { display: flex; align-items: center; gap: .3rem; flex-wrap: wrap; }
nav a, .nav-boton {
  color: var(--tenue); padding: .45rem .8rem; border-radius: 10px; font-size: .93rem; font-weight: 500;
  background: none; border: 0; cursor: pointer; font-family: inherit;
}
nav a:hover, .nav-boton:hover { color: var(--texto); background: var(--vidrio-2); text-decoration: none; }
nav a.activo { color: var(--texto); background: rgba(139, 92, 246, .16); box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .35); }
nav form { margin: 0; }
.chip-usuario {
  display: inline-flex; align-items: center; gap: .45rem; padding: .35rem .75rem; border-radius: 999px;
  background: var(--vidrio-2); border: 1px solid var(--borde); font: 600 .85rem var(--mono); color: var(--texto);
}
.chip-usuario::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--verde); box-shadow: 0 0 10px var(--verde); }

main { width: 100%; max-width: 1180px; margin: 0 auto; padding: clamp(1.2rem, 4vw, 2.5rem); flex: 1; }
footer { text-align: center; color: var(--tenue); font-size: .82rem; padding: 2rem 1rem 2.5rem; border-top: 1px solid var(--borde); }

/* ----------------------------------------------------------------- botones */
.boton {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .7rem 1.25rem; border-radius: 12px; border: 0; cursor: pointer;
  background: var(--grad); color: #fff; font: 700 .95rem var(--sans);
  box-shadow: 0 6px 24px -8px rgba(139, 92, 246, .8); transition: transform .15s, box-shadow .2s, filter .2s;
}
.boton:hover { transform: translateY(-1px); filter: brightness(1.12); box-shadow: 0 10px 30px -8px rgba(34, 211, 238, .6); text-decoration: none; }
.boton:active { transform: translateY(0); }
.boton.grande { padding: .95rem 1.6rem; font-size: 1.05rem; border-radius: 14px; }
.boton.fantasma { background: var(--vidrio-2); box-shadow: inset 0 0 0 1px var(--borde-2); }
.boton.fantasma:hover { box-shadow: inset 0 0 0 1px var(--cian); }
.boton.peligro { background: linear-gradient(135deg, #f43f5e, #fb7185); box-shadow: 0 6px 24px -8px rgba(244, 63, 94, .7); }
.boton.mini-boton { padding: .35rem .7rem; font-size: .8rem; border-radius: 9px; }
.boton[disabled] { opacity: .5; cursor: not-allowed; transform: none; }

/* ----------------------------------------------------------------- tarjetas */
.panel, .tarjeta, .formulario, .metodo {
  background: linear-gradient(180deg, var(--vidrio-2), var(--vidrio));
  border: 1px solid var(--borde); border-radius: var(--radio);
  backdrop-filter: blur(8px); box-shadow: var(--sombra);
}
.panel, .metodo { padding: clamp(1.2rem, 3vw, 2rem); }
.tarjeta { padding: 1.4rem; transition: transform .2s, border-color .2s; }
.tarjeta:hover { transform: translateY(-3px); border-color: var(--borde-2); }
.tarjeta h3 { margin: .2rem 0 .4rem; }

/* ----------------------------------------------------------------- avisos (toasts) */
.toasts { position: fixed; top: 76px; right: 1rem; z-index: 100; display: flex; flex-direction: column; gap: .6rem; width: min(420px, calc(100vw - 2rem)); }
.aviso {
  display: flex; gap: .7rem; align-items: flex-start; padding: .9rem 1rem; border-radius: 14px;
  background: rgba(13, 17, 32, .92); backdrop-filter: blur(12px);
  border: 1px solid var(--borde-2); box-shadow: var(--sombra); animation: entrar .35s cubic-bezier(.2, .9, .3, 1.2);
}
.aviso::before { font-size: 1.1rem; line-height: 1.4; }
.aviso.ok { border-color: rgba(52, 211, 153, .5); } .aviso.ok::before { content: "✅"; }
.aviso.error { border-color: rgba(251, 113, 133, .55); } .aviso.error::before { content: "⛔"; }
.aviso.info { border-color: rgba(96, 165, 250, .5); } .aviso.info::before { content: "💡"; }
.aviso .cerrar { margin-left: auto; background: none; border: 0; color: var(--tenue); cursor: pointer; font-size: 1.1rem; line-height: 1; }
.aviso.saliendo { animation: salir .3s forwards; }
@keyframes entrar { from { opacity: 0; transform: translateX(30px) scale(.97); } }
@keyframes salir { to { opacity: 0; transform: translateX(30px); } }
.nota { padding: .9rem 1.1rem; border-radius: 12px; border: 1px solid rgba(96, 165, 250, .35); background: rgba(96, 165, 250, .08); }
.nota.advertencia { border-color: rgba(251, 191, 36, .4); background: rgba(251, 191, 36, .08); }

/* ----------------------------------------------------------------- portada */
.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; padding: clamp(1rem, 4vw, 3rem) 0 2rem; }
.kicker {
  display: inline-flex; align-items: center; gap: .5rem; padding: .35rem .8rem; border-radius: 999px;
  font: 600 .75rem var(--mono); letter-spacing: .12em; color: #c4b5fd;
  background: rgba(139, 92, 246, .12); border: 1px solid rgba(139, 92, 246, .35);
}
.kicker::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cian); box-shadow: 0 0 10px var(--cian); animation: latido 1.6s infinite; }
@keyframes latido { 50% { opacity: .3; } }
.hero h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); line-height: 1.04; margin: 1.1rem 0 1rem; letter-spacing: -.04em; }
.lema { color: var(--tenue); font-size: 1.12rem; max-width: 34rem; }
.acciones { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.6rem 0; }
.cifras { display: grid; grid-template-columns: repeat(4, 1fr); gap: .7rem; max-width: 34rem; }
.cifra { padding: .8rem; border-radius: 14px; background: var(--vidrio); border: 1px solid var(--borde); text-align: center; }
.cifra b { display: block; font: 800 1.5rem var(--mono); }
.cifra span { font-size: .75rem; color: var(--tenue); text-transform: uppercase; letter-spacing: .08em; }

/* Terminal animada */
.terminal { border-radius: 16px; overflow: hidden; border: 1px solid var(--borde-2); background: #05060c; box-shadow: var(--brillo), var(--sombra); transform: perspective(1200px) rotateY(-6deg) rotateX(3deg); }
.terminal-barra { display: flex; align-items: center; gap: .45rem; padding: .7rem .9rem; background: #0e1222; border-bottom: 1px solid var(--borde); font: .75rem var(--mono); color: var(--tenue); }
.terminal-barra i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.terminal-barra i:nth-child(2) { background: #febc2e; } .terminal-barra i:nth-child(3) { background: #28c840; margin-right: .5rem; }
.terminal-cuerpo { padding: 1.1rem 1.2rem 1.3rem; font: .86rem/1.75 var(--mono); color: #c7d2fe; min-height: 250px; }
.terminal-cuerpo p { margin: 0; white-space: nowrap; overflow: hidden; opacity: 0; animation: linea .01s forwards; }
.terminal-cuerpo .p { color: var(--verde); } .terminal-cuerpo .c { color: var(--tenue); } .terminal-cuerpo .f { color: var(--ambar); text-shadow: 0 0 12px rgba(251, 191, 36, .5); }
.terminal-cuerpo p:nth-child(1) { animation-delay: .3s; } .terminal-cuerpo p:nth-child(2) { animation-delay: .9s; }
.terminal-cuerpo p:nth-child(3) { animation-delay: 1.5s; } .terminal-cuerpo p:nth-child(4) { animation-delay: 2.1s; }
.terminal-cuerpo p:nth-child(5) { animation-delay: 2.7s; } .terminal-cuerpo p:nth-child(6) { animation-delay: 3.3s; }
.terminal-cuerpo p:nth-child(7) { animation-delay: 3.9s; } .terminal-cuerpo p:nth-child(8) { animation-delay: 4.5s; }
@keyframes linea { to { opacity: 1; } }
.cursor { display: inline-block; width: .55em; height: 1.1em; background: var(--cian); vertical-align: text-bottom; animation: latido 1s steps(1) infinite; }

.pasos { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin: 1rem 0 2rem; }
.paso-num { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font: 800 1rem var(--mono); background: var(--grad); box-shadow: 0 0 20px rgba(139, 92, 246, .45); }
.seccion-titulo { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin: 3rem 0 1rem; }
.seccion-titulo h2 { margin: 0; }

.categorias { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: .8rem; }
.categoria-chip {
  position: relative; overflow: hidden; padding: 1.1rem; border-radius: 14px; background: var(--vidrio);
  border: 1px solid var(--borde); transition: transform .2s, border-color .2s;
}
.categoria-chip::after { content: ""; position: absolute; inset: auto -30% -60% auto; width: 120px; height: 120px; border-radius: 50%; background: var(--cat); opacity: .14; filter: blur(20px); }
.categoria-chip:hover { transform: translateY(-3px); border-color: var(--cat); }
.categoria-chip .icono { font-size: 1.6rem; }
.categoria-chip b { display: block; margin-top: .3rem; }
.categoria-chip span { font: .78rem var(--mono); color: var(--tenue); }

/* ----------------------------------------------------------------- formularios */
.auth { display: grid; grid-template-columns: 1fr 1fr; gap: 0; max-width: 940px; margin: 1rem auto; border-radius: 22px; overflow: hidden; border: 1px solid var(--borde); box-shadow: var(--sombra); }
.auth-lado { position: relative; padding: 2.4rem; background: radial-gradient(120% 90% at 0% 0%, rgba(139, 92, 246, .35), transparent 60%), radial-gradient(90% 80% at 100% 100%, rgba(34, 211, 238, .22), transparent 60%), #0a0d1a; }
.auth-lado h2 { margin-top: .8rem; font-size: 1.6rem; }
.auth-lado ul { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: .9rem; }
.auth-lado li { display: flex; gap: .7rem; align-items: flex-start; color: #cdd3f5; }
.auth-lado li b { color: var(--texto); }
.auth .formulario { border: 0; border-radius: 0; margin: 0; max-width: none; box-shadow: none; }
.formulario { max-width: 440px; margin: 2rem auto; padding: 2.2rem; display: flex; flex-direction: column; gap: 1.05rem; }
.formulario h1 { font-size: 1.7rem; margin: 0; }
label { display: flex; flex-direction: column; gap: .4rem; font-size: .9rem; font-weight: 600; color: #cdd3f5; }
input {
  width: 100%; background: rgba(5, 6, 12, .7); color: var(--texto); border: 1px solid var(--borde-2);
  border-radius: 11px; padding: .75rem .9rem; font: 500 1rem var(--sans); transition: border-color .2s, box-shadow .2s;
}
input::placeholder { color: #5b6285; }
input:focus { outline: none; border-color: var(--violeta); box-shadow: 0 0 0 4px rgba(139, 92, 246, .2); }
.campo-clave { position: relative; }
.campo-clave input { padding-right: 3rem; }
.ver-clave { position: absolute; right: .45rem; top: 50%; transform: translateY(-50%); background: none; border: 0; cursor: pointer; font-size: 1.05rem; padding: .35rem; border-radius: 8px; color: var(--tenue); }
.ver-clave:hover { background: var(--vidrio-2); }
.medidor { height: 6px; border-radius: 99px; background: rgba(255, 255, 255, .07); overflow: hidden; }
.medidor div { height: 100%; width: 0; border-radius: inherit; transition: width .3s, background .3s; background: var(--rojo); }
.medidor[data-nivel="2"] div { background: var(--ambar); }
.medidor[data-nivel="3"] div { background: var(--azul); }
.medidor[data-nivel="4"] div { background: var(--verde); }
.requisitos { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: .25rem .8rem; font-size: .8rem; color: var(--tenue); }
.requisitos li::before { content: "○ "; }
.requisitos li.cumple { color: var(--verde); }
.requisitos li.cumple::before { content: "● "; }
.separador { display: flex; align-items: center; gap: .8rem; color: var(--tenue); font-size: .8rem; }
.separador::before, .separador::after { content: ""; flex: 1; height: 1px; background: var(--borde); }

/* ----------------------------------------------------------------- tablero de retos */
.cabecera-retos { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.2rem; }
.anillo {
  --pct: 0; width: 112px; height: 112px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: conic-gradient(var(--cian) calc(var(--pct) * 1%), var(--violeta) calc(var(--pct) * 1%), rgba(255, 255, 255, .07) 0);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 10px), #000 calc(100% - 9px));
          mask: radial-gradient(farthest-side, transparent calc(100% - 10px), #000 calc(100% - 9px));
}
.marcador-propio { display: flex; align-items: center; gap: 1.1rem; }
.anillo-envoltura { position: relative; width: 112px; height: 112px; }
.anillo-envoltura .anillo-texto { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.anillo-texto b { font: 800 1.35rem var(--mono); }
.anillo-texto span { font-size: .7rem; color: var(--tenue); }
.marcador-propio .detalle b { font: 800 1.8rem var(--mono); }
.filtros { display: flex; gap: .5rem; flex-wrap: wrap; margin: .5rem 0 1rem; }
.filtro { padding: .4rem .85rem; border-radius: 999px; background: var(--vidrio); border: 1px solid var(--borde); color: var(--tenue); cursor: pointer; font: 600 .82rem var(--sans); }
.filtro:hover { color: var(--texto); }
.filtro.activo { color: var(--texto); border-color: var(--cat, var(--violeta)); background: rgba(139, 92, 246, .14); }

.categoria { margin-top: 2.2rem; }
.categoria-cabecera { display: flex; align-items: center; gap: .8rem; margin-bottom: .9rem; }
.categoria-cabecera h2 { margin: 0; font-size: 1.25rem; }
.categoria-cabecera .icono { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; font-size: 1.25rem; background: color-mix(in srgb, var(--cat) 18%, transparent); border: 1px solid color-mix(in srgb, var(--cat) 45%, transparent); }
.contador { margin-left: auto; font: 600 .8rem var(--mono); color: var(--cat); padding: .25rem .65rem; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--cat) 40%, transparent); }

.grilla { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: .9rem; align-items: start; }
.reto {
  position: relative; border-radius: 14px; overflow: hidden;
  background: linear-gradient(180deg, var(--vidrio-2), var(--vidrio)); border: 1px solid var(--borde);
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.reto::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--cat); box-shadow: 0 0 14px var(--cat); }
.reto:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--cat) 55%, transparent); }
.reto[open] { grid-column: 1 / -1; transform: none; border-color: color-mix(in srgb, var(--cat) 60%, transparent); box-shadow: 0 0 0 1px color-mix(in srgb, var(--cat) 25%, transparent), 0 12px 40px -12px color-mix(in srgb, var(--cat) 45%, transparent); }
.reto > summary { list-style: none; cursor: pointer; padding: 1rem 1.1rem 1rem 1.3rem; display: grid; grid-template-columns: auto 1fr auto; gap: .9rem; align-items: center; }
.reto > summary::-webkit-details-marker { display: none; }
.puntos { font: 800 1.2rem var(--mono); color: var(--cat); min-width: 3.2ch; text-align: center; padding: .35rem .5rem; border-radius: 10px; background: color-mix(in srgb, var(--cat) 12%, transparent); }
.reto .nombre { font-weight: 700; display: block; }
.reto .estado { font-size: .78rem; color: var(--tenue); }
.reto .flecha { color: var(--tenue); transition: transform .2s; }
.reto[open] .flecha { transform: rotate(90deg); }
.reto.hecho { background: linear-gradient(180deg, rgba(52, 211, 153, .10), rgba(52, 211, 153, .03)); }
.reto.hecho .estado { color: var(--verde); font-weight: 600; }
.reto.hecho .puntos::after { content: " ✓"; }
.cuerpo { padding: 0 1.3rem 1.3rem; border-top: 1px dashed var(--borde); }
.cuerpo > p:first-child { margin-top: 1rem; }
.ubicacion { display: flex; gap: .6rem; align-items: flex-start; font: .84rem var(--mono); color: #cdd3f5; background: rgba(5, 6, 12, .6); border: 1px solid var(--borde); padding: .7rem .9rem; border-radius: 10px; word-break: break-word; }
.pista { margin-top: .8rem; }
.pista summary { cursor: pointer; color: var(--ambar); font-weight: 600; font-size: .9rem; list-style: none; }
.pista summary::-webkit-details-marker { display: none; }
.pista p { margin: .5rem 0 0; padding: .7rem .9rem; border-radius: 10px; background: rgba(251, 191, 36, .07); border: 1px solid rgba(251, 191, 36, .25); }
.enviar { display: flex; gap: .6rem; margin-top: 1rem; }
.enviar input { flex: 1; min-width: 0; font-family: var(--mono); }
.ok-texto { color: var(--verde); font-weight: 600; margin: 1rem 0 0; }

/* ----------------------------------------------------------------- marcador */
.podio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; align-items: end; max-width: 760px; margin: 2rem auto 2.5rem; }
.podio-lugar { text-align: center; }
.podio-lugar .avatar { width: 64px; height: 64px; margin: 0 auto .6rem; border-radius: 50%; display: grid; place-items: center; font: 800 1.5rem var(--mono); background: var(--grad); box-shadow: 0 0 24px rgba(139, 92, 246, .55); text-transform: uppercase; }
.podio-lugar .nombre { font-weight: 700; word-break: break-all; }
.podio-lugar .pts { font: 700 .9rem var(--mono); color: var(--tenue); }
.podio-bloque { margin-top: .7rem; border-radius: 14px 14px 4px 4px; display: grid; place-items: center; font-size: 2rem; border: 1px solid var(--borde-2); background: linear-gradient(180deg, rgba(139, 92, 246, .3), rgba(139, 92, 246, .05)); }
.p1 .podio-bloque { height: 150px; background: linear-gradient(180deg, rgba(251, 191, 36, .35), rgba(251, 191, 36, .05)); border-color: rgba(251, 191, 36, .5); }
.p1 .avatar { width: 80px; height: 80px; background: linear-gradient(135deg, #fbbf24, #f472b6); box-shadow: 0 0 30px rgba(251, 191, 36, .55); }
.p2 .podio-bloque { height: 110px; }
.p3 .podio-bloque { height: 80px; background: linear-gradient(180deg, rgba(34, 211, 238, .25), rgba(34, 211, 238, .04)); }

.tabla-envoltura { overflow-x: auto; border-radius: var(--radio); border: 1px solid var(--borde); background: var(--vidrio); }
.tabla { width: 100%; border-collapse: collapse; }
.tabla th, .tabla td { padding: .8rem 1rem; text-align: left; border-bottom: 1px solid var(--borde); white-space: nowrap; }
.tabla th { font: 700 .72rem var(--mono); text-transform: uppercase; letter-spacing: .1em; color: var(--tenue); background: rgba(255, 255, 255, .02); }
.tabla tbody tr:hover { background: rgba(139, 92, 246, .06); }
.tabla tr:last-child td { border-bottom: 0; }
.tabla .yo { background: rgba(34, 211, 238, .08); }
.posicion { font: 800 .95rem var(--mono); color: var(--tenue); }
progress { -webkit-appearance: none; appearance: none; width: 140px; height: 8px; border: 0; border-radius: 99px; background: rgba(255, 255, 255, .08); overflow: hidden; vertical-align: middle; }
progress::-webkit-progress-bar { background: rgba(255, 255, 255, .08); border-radius: 99px; }
progress::-webkit-progress-value { background: var(--grad); border-radius: 99px; }
progress::-moz-progress-bar { background: var(--grad); border-radius: 99px; }
.etiqueta { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font: 600 .75rem var(--mono); }
.etiqueta.ok { color: var(--verde); background: rgba(52, 211, 153, .12); }
.etiqueta.mal { color: var(--rojo); background: rgba(251, 113, 133, .12); }

/* ----------------------------------------------------------------- laboratorio / cuenta */
.token-caja { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; padding: 1.2rem 1.4rem; border-radius: 16px; margin: 1rem 0; background: radial-gradient(120% 120% at 0% 0%, rgba(139, 92, 246, .25), transparent 60%), #05060c; border: 1px solid rgba(139, 92, 246, .45); box-shadow: var(--brillo); }
.token-caja code { font-size: clamp(1.2rem, 3.5vw, 1.9rem); letter-spacing: .12em; background: none; color: #fff; padding: 0; text-shadow: 0 0 18px rgba(34, 211, 238, .55); }
.linea-tiempo { list-style: none; padding: 0; margin: 1.5rem 0 0; position: relative; }
.linea-tiempo::before { content: ""; position: absolute; left: 19px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(var(--violeta), var(--cian)); opacity: .5; }
.linea-tiempo > li { position: relative; padding-left: 3.4rem; margin-bottom: 1.6rem; }
.linea-tiempo > li .paso-num { position: absolute; left: 0; top: 0; }
.linea-tiempo h3 { margin: .45rem 0 .5rem; }
.dos-columnas { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1.2rem; align-items: start; }

/* ----------------------------------------------------------------- panel docente */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: .9rem; margin: 1.2rem 0; }
.stat { padding: 1.1rem 1.2rem; border-radius: 14px; background: var(--vidrio); border: 1px solid var(--borde); }
.stat b { display: block; font: 800 1.9rem var(--mono); }
.stat span { font-size: .8rem; color: var(--tenue); }
.acciones-fila { display: flex; gap: .4rem; }
.acciones-fila form { margin: 0; }
.clave-temporal { padding: 1.2rem 1.4rem; border-radius: 14px; border: 1px solid rgba(52, 211, 153, .5); background: rgba(52, 211, 153, .08); margin: 1rem 0; }
.clave-temporal code { font-size: 1.3rem; color: #fff; background: none; }
.zona-peligro { border-color: rgba(251, 113, 133, .35); }

/* ----------------------------------------------------------------- error */
.error-pagina { text-align: center; padding: 4rem 1rem; }
.error-codigo { font: 900 clamp(5rem, 16vw, 9rem)/1 var(--mono); background: var(--grad-texto); -webkit-background-clip: text; background-clip: text; color: transparent; filter: drop-shadow(0 0 30px rgba(139, 92, 246, .45)); }

/* ----------------------------------------------------------------- responsivo y accesibilidad */
@media (max-width: 860px) {
  .hero, .auth, .dos-columnas { grid-template-columns: 1fr; }
  .terminal { transform: none; }
  .cifras { grid-template-columns: repeat(2, 1fr); }
  .auth-lado { padding: 1.8rem; }
  .requisitos { grid-template-columns: 1fr; }
  .toasts { top: auto; bottom: 1rem; }
}
@media (max-width: 560px) {
  .grilla { grid-template-columns: 1fr; }
  .enviar { flex-direction: column; }
  .podio { gap: .5rem; }
  .barra { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition: none !important; scroll-behavior: auto !important; }
}
.oculto-visual { position: fixed; left: -9999px; top: 0; opacity: 0; }