:root {
  --black: #0b0b10;
  --panel: #15151d;
  --gold: #d4af6a;
  --gold-light: #f0d78c;
  --white: #f5f1e8;
  --gray: #9a958a;
  --line: #2e2b24;
  --radius: 14px;
  --danger: #c0392b;
  --success: #3fa15e;
  --gold-dark: #b8902f;
  --silver: #c9cacc;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--black);
  color: var(--white);
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}
a { color: var(--gold-light); text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 20px 18px 60px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 1.15rem; margin: 0; font-weight: 600; }
.topbar .user-info { font-size: 0.85rem; color: var(--gray); display: flex; gap: 12px; align-items: center; }

.btn {
  display: inline-block; border: none; border-radius: 10px;
  padding: 11px 18px; font-weight: 600; font-size: 0.9rem;
  cursor: pointer; text-align: center;
}
.btn-gold { background: linear-gradient(135deg, var(--gold-light), var(--gold)); color: #1a1400; }
.btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--white); }
.btn-danger { background: var(--danger); color: white; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px;
}

.grid-courses {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px; margin-top: 20px;
}
.course-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; }
.course-card .cover {
  height: 130px; background: linear-gradient(135deg, #2a2416, #1a1a1a);
  display: flex; align-items: center; justify-content: center; color: var(--gold);
  font-size: 1.8rem;
}
.course-card .body { padding: 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.course-card h3 { margin: 0; font-size: 1.05rem; }
.course-card p { margin: 0; color: var(--gray); font-size: 0.85rem; flex: 1; }
.price-tag { color: var(--gold-light); font-weight: 700; font-size: 1.05rem; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 0.82rem; color: var(--gray); margin-bottom: 5px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--line); background: #111; color: var(--white); font-size: 0.95rem;
}
.form-group textarea { resize: vertical; min-height: 80px; }

.tabs { display: flex; gap: 6px; margin-bottom: 20px; }
.tab-btn {
  flex: 1; padding: 10px; border-radius: 8px; border: 1px solid var(--line);
  background: transparent; color: var(--gray); cursor: pointer; font-weight: 600;
}
.tab-btn.active { background: var(--gold); color: #1a1400; border-color: var(--gold); }

.alert { padding: 10px 14px; border-radius: 8px; font-size: 0.85rem; margin-bottom: 14px; }
.alert-error { background: #3a1414; color: #ff8a80; border: 1px solid #5a1e1e; }
.alert-success { background: #123a1e; color: #7be49a; border: 1px solid #1e5a30; }

.lesson-list { display: flex; flex-direction: column; gap: 6px; margin-top: 14px; }
.lesson-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border-radius: 8px; border: 1px solid var(--line); cursor: pointer; font-size: 0.9rem;
}
.lesson-item.locked { opacity: 0.5; cursor: not-allowed; }
.lesson-item.active { border-color: var(--gold); background: #1f1a0f; }

.video-box {
  background: #000; border-radius: var(--radius); aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center; color: var(--gray);
  margin-bottom: 16px; overflow: hidden;
}
.video-box video { width: 100%; height: 100%; }

.quiz-question { margin-bottom: 22px; }
.quiz-question p.text { font-weight: 600; margin-bottom: 10px; }
.quiz-option {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border-radius: 8px; border: 1px solid var(--line); margin-bottom: 8px; cursor: pointer;
}
.quiz-option.selected { border-color: var(--gold); background: #1f1a0f; }

.empty-state { text-align: center; padding: 50px 20px; color: var(--gray); }

/* ===== UNIVERSO GP: fondo de estrellas ===== */
body {
  background-color: var(--black);
  background-image:
    radial-gradient(ellipse at 50% -20%, rgba(212, 175, 106, 0.10), transparent 60%),
    radial-gradient(1.5px 1.5px at 12% 18%, rgba(255, 255, 255, 0.70), transparent),
    radial-gradient(1.5px 1.5px at 68% 8%, rgba(240, 215, 140, 0.80), transparent),
    radial-gradient(2px 2px at 35% 62%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1.5px 1.5px at 82% 44%, rgba(240, 215, 140, 0.70), transparent),
    radial-gradient(1.5px 1.5px at 55% 85%, rgba(255, 255, 255, 0.50), transparent),
    radial-gradient(2px 2px at 92% 76%, rgba(212, 175, 106, 0.65), transparent),
    radial-gradient(1.5px 1.5px at 24% 92%, rgba(240, 215, 140, 0.60), transparent),
    radial-gradient(1.5px 1.5px at 46% 30%, rgba(255, 255, 255, 0.45), transparent);
  background-size: 100% 100%, 420px 420px, 317px 317px, 523px 523px, 389px 389px, 457px 457px, 601px 601px, 353px 353px, 271px 271px;
  background-repeat: no-repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat;
  background-attachment: fixed;
}
/* FIN-UNIVERSO-ESTRELLAS */

/* ===== UNIVERSO GP: logo en encabezado ===== */
.topbar h1.brand { line-height: 0; }
.topbar .brand a { display: inline-block; }
.topbar .brand-logo { height: 64px; width: auto; display: block; }
@media (max-width: 600px) {
  .topbar .brand-logo { height: 46px; }
}
/* FIN-UNIVERSO-LOGO */

/* ===== UNIVERSO GP: planetas del catalogo ===== */
.gp-titulo { margin-bottom: 4px; }
.gp-subtitulo { margin: 0; color: var(--silver); font-size: 0.95rem; letter-spacing: 0.04em; }
.course-card .cover {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1px 1px at 18% 28%, rgba(245,241,232,.7) 50%, transparent 51%),
    radial-gradient(1px 1px at 72% 18%, rgba(245,241,232,.5) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 86% 70%, rgba(240,215,140,.8) 50%, transparent 51%),
    radial-gradient(1px 1px at 30% 82%, rgba(245,241,232,.4) 50%, transparent 51%),
    radial-gradient(1px 1px at 8% 60%, rgba(245,241,232,.5) 50%, transparent 51%),
    radial-gradient(ellipse at 50% 130%, rgba(212,175,106,.18), transparent 60%),
    linear-gradient(160deg, #12121a, #0b0b10);
}
/* Planeta en 3 capas: anillo trasero (fondo), esfera (::before), anillo delantero (::after) */
.planeta {
  --c1: #f0d78c; --c2: #d4af6a; --c3: #6b5320;
  --anillo: rgba(240,215,140,.75);
  position: relative; display: block; width: 124px; height: 72px;
  isolation: isolate;
  background: radial-gradient(closest-side, transparent 90%, var(--anillo) 93%, var(--anillo) 97%, transparent 100%) center / 124px 32px no-repeat;
  transform: rotate(-18deg);
  transition: transform .8s ease;
}
.planeta::before {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 64px; height: 64px; margin: -32px 0 0 -32px; border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, var(--c1), var(--c2) 45%, var(--c3) 100%);
  box-shadow: 0 0 22px rgba(212,175,106,.30), inset -8px -10px 18px rgba(0,0,0,.45);
  transform: rotate(18deg);
}
.planeta::after {
  content: ""; position: absolute; inset: 0;
  background: inherit;
  clip-path: inset(50% 0 0 0);
}
.planeta-1 { --c1: #f4f4f4; --c2: #c9cacc; --c3: #55565b; }
.planeta-2 { --c1: #f6d2c4; --c2: #c99a86; --c3: #6e4639; }
.planeta-3 { --c1: #e8b98a; --c2: #b8902f; --c3: #5c3d16; }
.course-card:hover .planeta { transform: rotate(-24deg) scale(1.06); }
@media (prefers-reduced-motion: reduce) {
  .planeta { transition: none; }
  .course-card:hover .planeta { transform: rotate(-18deg); }
}
/* FIN-PLANETAS */

/* ===== UNIVERSO GP: estrellas animadas ===== */
body {
  isolation: isolate;
  background-image:
    radial-gradient(ellipse at 50% -20%, rgba(212,175,106,.10), transparent 60%),
    radial-gradient(1px 1px at 17% 23%, rgba(245,241,232,.45), transparent),
    radial-gradient(1px 1px at 44% 58%, rgba(245,241,232,.35), transparent),
    radial-gradient(1px 1px at 69% 37%, rgba(245,241,232,.40), transparent),
    radial-gradient(1px 1px at 86% 84%, rgba(245,241,232,.35), transparent),
    radial-gradient(1px 1px at 33% 89%, rgba(245,241,232,.30), transparent);
  background-size: 100% 100%, 1100px 1100px, 1100px 1100px, 1100px 1100px, 1100px 1100px, 1100px 1100px;
  background-repeat: no-repeat, repeat, repeat, repeat, repeat, repeat;
  background-attachment: fixed;
}
body::before, body::after {
  content: ""; position: fixed; inset: -60px; z-index: -1; pointer-events: none;
}
body::before {
  background-image:
    radial-gradient(1px 1px at 7% 12%, rgba(245,241,232,.65), transparent),
    radial-gradient(1.5px 1.5px at 23% 41%, rgba(245,241,232,.55), transparent),
    radial-gradient(1px 1px at 38% 7%, rgba(245,241,232,.50), transparent),
    radial-gradient(1.5px 1.5px at 51% 66%, rgba(245,241,232,.60), transparent),
    radial-gradient(1px 1px at 64% 28%, rgba(245,241,232,.45), transparent),
    radial-gradient(2px 2px at 79% 53%, rgba(245,241,232,.50), transparent),
    radial-gradient(1px 1px at 91% 17%, rgba(245,241,232,.60), transparent),
    radial-gradient(1.5px 1.5px at 13% 79%, rgba(245,241,232,.50), transparent),
    radial-gradient(1px 1px at 31% 93%, rgba(245,241,232,.40), transparent),
    radial-gradient(1px 1px at 58% 88%, rgba(245,241,232,.55), transparent),
    radial-gradient(1.5px 1.5px at 72% 81%, rgba(245,241,232,.45), transparent),
    radial-gradient(1px 1px at 96% 71%, rgba(245,241,232,.50), transparent);
  background-size: 900px 900px;
  animation: gp-deriva 90s ease-in-out infinite alternate;
  will-change: transform;
}
body::after {
  background-image:
    radial-gradient(2px 2px at 9% 34%, rgba(240,215,140,.85), transparent),
    radial-gradient(1.5px 1.5px at 27% 72%, rgba(212,175,106,.80), transparent),
    radial-gradient(2px 2px at 46% 19%, rgba(240,215,140,.75), transparent),
    radial-gradient(1.5px 1.5px at 61% 47%, rgba(255,255,255,.80), transparent),
    radial-gradient(2px 2px at 83% 9%, rgba(212,175,106,.85), transparent),
    radial-gradient(1.5px 1.5px at 74% 91%, rgba(240,215,140,.70), transparent),
    radial-gradient(2px 2px at 94% 58%, rgba(255,255,255,.70), transparent);
  background-size: 1300px 1300px;
  animation: gp-titileo 6s ease-in-out infinite alternate;
  will-change: opacity;
}
@keyframes gp-deriva { from { transform: translate3d(0,0,0); } to { transform: translate3d(-40px,-24px,0); } }
@keyframes gp-titileo { from { opacity: .30; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  body::before, body::after { animation: none; }
  body::after { opacity: .8; }
}
/* FIN-ESTRELLAS-ANIMADAS */

/* ===== UNIVERSO GP: chat ===== */
.gp-chat-feed {
  height: 340px; overflow-y: auto; margin-bottom: 12px; padding: 14px;
  display: flex; flex-direction: column; gap: 10px;
  border: 1px solid rgba(212,175,106,.22); border-radius: 12px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(212,175,106,.07), transparent 60%),
    linear-gradient(180deg, #101017, #0b0b10);
  scrollbar-width: thin; scrollbar-color: rgba(212,175,106,.45) transparent;
}
.gp-chat-feed::-webkit-scrollbar { width: 6px; }
.gp-chat-feed::-webkit-scrollbar-thumb { background: rgba(212,175,106,.45); border-radius: 3px; }
.gp-chat-feed:empty { justify-content: center; align-items: center; }
.gp-chat-feed:empty::before {
  content: attr(data-vacio); color: var(--silver); font-size: .9rem;
  text-align: center; opacity: .8; padding: 0 20px;
}
.gp-msg { display: flex; align-items: flex-end; gap: 8px; max-width: 82%; animation: gp-msg-entra .35s ease-out; }
.gp-msg--mia { align-self: flex-end; }
.gp-msg--otra { align-self: flex-start; }
.gp-msg-avatar {
  flex: 0 0 30px; width: 30px; height: 30px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700; color: var(--black);
  background: radial-gradient(circle at 35% 30%, var(--gold-light), var(--gold) 60%, var(--gold-dark));
  box-shadow: 0 0 10px rgba(212,175,106,.25);
}
.gp-msg-burbuja {
  display: flex; flex-direction: column; gap: 2px; padding: 8px 12px 6px;
  border-radius: 14px; line-height: 1.4; word-break: break-word;
}
.gp-msg--mia .gp-msg-burbuja {
  background: linear-gradient(135deg, var(--gold-light), var(--gold)); color: #1a1408;
  border-bottom-right-radius: 4px; box-shadow: 0 2px 10px rgba(212,175,106,.18);
}
.gp-msg--otra .gp-msg-burbuja {
  background: var(--panel); color: var(--white);
  border: 1px solid rgba(201,202,204,.22); border-bottom-left-radius: 4px;
}
.gp-msg-nombre { font-size: .72rem; font-weight: 700; letter-spacing: .03em; }
.gp-msg--mia .gp-msg-nombre { color: rgba(26,20,8,.75); }
.gp-msg--otra .gp-msg-nombre { color: var(--gold-light); }
.gp-msg-texto { font-size: .95rem; white-space: pre-wrap; }
.gp-msg-hora { align-self: flex-end; font-size: .68rem; opacity: .65; }
.gp-chat-form { display: flex; gap: 8px; }
.gp-chat-input {
  flex: 1; padding: 10px 14px; border-radius: 10px; font: inherit;
  color: var(--white); background: #101017;
  border: 1px solid rgba(201,202,204,.25);
  transition: border-color .2s, box-shadow .2s;
}
.gp-chat-input::placeholder { color: rgba(201,202,204,.55); }
.gp-chat-input:focus { outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(212,175,106,.18); }
@keyframes gp-msg-entra { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .gp-msg { animation: none; } }
@media (max-width: 600px) {
  .gp-chat-feed { height: 280px; }
  .gp-msg { max-width: 92%; }
}
/* FIN-CHAT */

/* ===== UNIVERSO GP: acceso ===== */
.gp-acceso { max-width: 440px; margin: 36px auto 48px; }
.gp-acceso-encabezado { text-align: center; margin-bottom: 22px; animation: gp-acceso-aparece 1.2s ease-out both; }
.gp-acceso-titulo {
  color: var(--gold); text-transform: uppercase; letter-spacing: .18em;
  font-size: clamp(1.1rem, 3.4vw, 1.45rem); font-weight: 700; margin: 0 0 8px;
}
.gp-acceso-texto { color: var(--silver); margin: 0; font-size: .95rem; line-height: 1.6; }
.gp-acceso .card {
  background: linear-gradient(180deg, rgba(21,21,29,.92), rgba(11,11,16,.92));
  border: 1px solid rgba(212,175,106,.28); border-radius: 16px;
  box-shadow: 0 0 34px rgba(212,175,106,.10), inset 0 1px 0 rgba(240,215,140,.08);
  animation: gp-acceso-aparece 1.2s .25s ease-out both;
}
.gp-acceso .tabs { gap: 0; border-bottom: 1px solid rgba(201,202,204,.18); }
.gp-acceso .tab-btn {
  flex: 1; background: transparent; border: 0; border-bottom: 2px solid transparent;
  border-radius: 0; margin-bottom: -1px; padding: 10px 6px; cursor: pointer;
  color: var(--silver); font-weight: 600; letter-spacing: .03em;
  transition: color .2s, border-color .2s;
}
.gp-acceso .tab-btn:hover { color: var(--gold-light); }
.gp-acceso .tab-btn.active { background: transparent; color: var(--gold); border-bottom-color: var(--gold); }
.gp-acceso .form-group label { color: var(--silver); letter-spacing: .03em; }
.gp-acceso .form-group input {
  background: #101017; color: var(--white);
  border: 1px solid rgba(201,202,204,.25); border-radius: 10px; padding: 10px 14px;
  transition: border-color .2s, box-shadow .2s;
}
.gp-acceso .form-group input:focus {
  outline: none; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(212,175,106,.18);
}
.gp-acceso .form-group input:-webkit-autofill {
  -webkit-text-fill-color: var(--white); box-shadow: 0 0 0 1000px #101017 inset;
  caret-color: var(--white);
}
.gp-acceso .btn-gold { letter-spacing: .06em; box-shadow: 0 0 20px rgba(212,175,106,.22); transition: box-shadow .2s; }
.gp-acceso .btn-gold:hover { box-shadow: 0 0 32px rgba(240,215,140,.40); }
.gp-destellos { position: fixed; inset: 0; pointer-events: none; z-index: -1; }
.gp-destellos span {
  position: absolute; width: 3px; height: 3px; border-radius: 50%;
  background: var(--gold-light); box-shadow: 0 0 6px var(--gold-light);
  opacity: .2; animation: gp-acceso-titila 4s ease-in-out infinite;
}
@keyframes gp-acceso-aparece { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes gp-acceso-titila { 0%, 100% { opacity: .15; } 50% { opacity: .9; } }
@media (prefers-reduced-motion: reduce) {
  .gp-acceso-encabezado, .gp-acceso .card, .gp-destellos span { animation: none; }
  .gp-destellos span { opacity: .5; }
}
@media (max-width: 600px) { .gp-acceso { margin-top: 20px; } }
/* FIN-ACCESO */