:root {
  --cc-bg: #0a1224;
  --cc-bg-soft: #101a31;
  --cc-surface: rgba(20, 31, 58, 0.92);
  --cc-surface-2: rgba(26, 41, 76, 0.92);
  --cc-card: rgba(17, 28, 52, 0.94);
  --cc-border: rgba(106, 164, 255, 0.22);
  --cc-border-strong: rgba(106, 164, 255, 0.42);
  --cc-text: #eef4ff;
  --cc-text-soft: #b8c6e3;
  --cc-primary: #4d8dff;
  --cc-primary-strong: #2e6fe8;
  --cc-accent: #52d6ff;
  --cc-success: #56d39b;
  --cc-warning: #ffcf5a;
  --cc-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --cc-radius: 20px;
  --cc-radius-sm: 14px;
  --cc-font: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}

body {
  margin: 0;
  font-family: var(--cc-font);
  color: var(--cc-text);
  background:
    radial-gradient(circle at top left, rgba(82, 214, 255, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(77, 141, 255, 0.18), transparent 34%),
    linear-gradient(180deg, #0a1224 0%, #0d1730 45%, #0a1224 100%);
  min-height: 100vh;
}

body.bg-light,
.bg-light {
  background:
    radial-gradient(circle at top left, rgba(82, 214, 255, 0.14), transparent 28%),
    radial-gradient(circle at top right, rgba(77, 141, 255, 0.18), transparent 34%),
    linear-gradient(180deg, #0a1224 0%, #0d1730 45%, #0a1224 100%) !important;
  color: var(--cc-text);
}

a {
  color: var(--cc-accent);
  text-decoration: none;
}

a:hover { color: #8ae6ff; }

.navbar {
  background: rgba(8, 14, 30, 0.8) !important;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 10px 30px rgba(0,0,0,0.18);
}

.navbar-brand {
  letter-spacing: 0.08em;
  font-weight: 800 !important;
}

.navbar-dark .navbar-nav .nav-link {
  color: var(--cc-text-soft);
  font-weight: 600;
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  transition: background-color .2s ease, color .2s ease, transform .2s ease;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus {
  color: var(--cc-text);
  background: rgba(77, 141, 255, 0.12);
  transform: translateY(-1px);
}

header,
.hero-shell {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(18, 31, 61, 0.96), rgba(10, 18, 36, 0.9)) !important;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.hero-shell::before,
header::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(82,214,255,.18), transparent 20%),
    radial-gradient(circle at 85% 15%, rgba(77,141,255,.20), transparent 22%);
  pointer-events: none;
}

.hero-card,
.story-bubble,
main.container > .lead,
.surface-panel {
  background: var(--cc-surface);
  border: 1px solid var(--cc-border);
  border-radius: var(--cc-radius);
  box-shadow: var(--cc-shadow);
  backdrop-filter: blur(14px);
}

.story-bubble {
  padding: 1.15rem 1.2rem;
  color: var(--cc-text);
}

.display-5,
h1, h2, h3, h4, h5 {
  color: #ffffff;
  letter-spacing: -0.02em;
}

.lead,
p, li, small, .text-muted, .muted, .card-text {
  color: var(--cc-text-soft) !important;
}

.btn {
  border-radius: 999px;
  font-weight: 700;
  padding: 0.75rem 1.15rem;
  border-width: 1px;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, border-color .18s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
}

.btn-primary {
  background: linear-gradient(180deg, var(--cc-primary), var(--cc-primary-strong));
  border-color: rgba(255,255,255,.06);
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(180deg, #5d98ff, #2e6fe8);
}

.btn-outline-primary,
.btn-outline-secondary {
  color: var(--cc-text);
  border-color: var(--cc-border-strong);
  background: rgba(255,255,255,0.02);
}

.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline-primary:focus,
.btn-outline-secondary:focus {
  background: rgba(77,141,255,0.14);
  border-color: rgba(106,164,255,0.5);
  color: #fff;
}

.card {
  background: linear-gradient(180deg, rgba(21,34,63,.96), rgba(15,24,46,.96));
  border: 1px solid var(--cc-border);
  border-radius: var(--cc-radius);
  box-shadow: var(--cc-shadow);
  overflow: hidden;
  color: var(--cc-text);
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(82,214,255,0.34);
}

.card .card-body {
  padding: 1.35rem;
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
}

hr {
  border-color: rgba(255,255,255,0.08);
  opacity: 1;
}

#board {
  margin: auto;
  max-width: 100%;
  border-radius: var(--cc-radius);
  overflow: hidden;
  box-shadow: var(--cc-shadow);
}

#status {
  font-size: 1.08rem;
  color: var(--cc-text-soft);
}

.inline-actions {
  display: flex;
  gap: .75rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.replay-link {
  color: var(--cc-accent);
}

footer {
  color: var(--cc-text-soft) !important;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(7, 12, 24, 0.52);
}

.list-group-item,
.table,
.form-control,
select.form-control,
select {
  background: rgba(255,255,255,0.04) !important;
  color: var(--cc-text) !important;
  border-color: rgba(255,255,255,0.1) !important;
}

.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem .8rem;
  border-radius: 999px;
  background: rgba(82,214,255,0.12);
  color: var(--cc-accent);
  font-weight: 700;
}

.section-title {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1rem;
}

.section-title::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--cc-accent), var(--cc-primary));
  box-shadow: 0 0 18px rgba(82,214,255,.45);
}

.content-shell {
  background: rgba(14, 22, 42, 0.82);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 28px;
  box-shadow: var(--cc-shadow);
  padding: clamp(1rem, 2vw, 2rem);
}

@media (pointer: coarse) {
  #board, .board-b72b1, .chessboard-63f37, .chessboard,
  #board *, .board-b72b1 *, .chessboard-63f37 *, .chessboard * {
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
  }
}

@media (max-width: 991.98px) {
  header,
  .hero-shell {
    padding-top: 3rem !important;
    padding-bottom: 3rem !important;
  }

  .display-5 {
    font-size: clamp(2rem, 8vw, 3rem);
  }
}

@media (max-width: 576px) {
  body {
    font-size: 15px;
  }

  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .content-shell,
  .card,
  .story-bubble,
  .hero-card {
    border-radius: 18px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .inline-actions {
    flex-direction: column;
    align-items: stretch;
  }

  #board {
    width: min(100%, 92vw);
  }

  footer {
    font-size: .95rem;
  }
}


/* Modal de promoción unificado con el estilo visual del juego */
.modal-promo-curso .modal-content.promo-modal-content {
  background: linear-gradient(180deg, #10233d 0%, #0b172a 100%);
  color: #eaf2ff;
  border: 1px solid rgba(120, 170, 255, 0.22);
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.modal-promo-curso .promo-modal-header {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 1rem 1.1rem 0.7rem;
  justify-content: center;
}

.modal-promo-curso .modal-title {
  font-weight: 700;
  letter-spacing: .02em;
}

.modal-promo-curso .promo-modal-body {
  padding: 1rem 1.1rem 1.2rem;
}

.modal-promo-curso .promo-modal-text {
  margin: 0 0 1rem;
  text-align: center;
  color: rgba(234, 242, 255, 0.86);
}

.promo-piece-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
}

.promo-piece-btn {
  appearance: none;
  border: 1px solid rgba(120, 170, 255, 0.22);
  background: linear-gradient(180deg, rgba(22, 44, 75, 0.96) 0%, rgba(10, 24, 44, 0.96) 100%);
  border-radius: 18px;
  padding: 0.7rem 0.35rem 0.55rem;
  color: #eaf2ff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 116px;
  transition: transform .14s ease, border-color .14s ease, box-shadow .14s ease, background .14s ease;
}

.promo-piece-btn:hover,
.promo-piece-btn:focus {
  transform: translateY(-2px);
  border-color: rgba(123, 180, 255, 0.68);
  box-shadow: 0 14px 26px rgba(6, 14, 26, 0.34);
  background: linear-gradient(180deg, rgba(31, 62, 106, 0.98) 0%, rgba(16, 35, 61, 0.98) 100%);
}

.promo-piece-img {
  width: min(15vw, 52px);
  height: min(15vw, 52px);
  object-fit: contain;
  display: block;
  pointer-events: none;
}

.promo-piece-label {
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.1;
  color: rgba(234, 242, 255, 0.92);
}

@media (max-width: 575.98px) {
  .modal-promo-curso .modal-dialog {
    margin: 0.85rem;
  }

  .promo-piece-grid {
    gap: 0.55rem;
  }

  .promo-piece-btn {
    min-height: 100px;
    border-radius: 16px;
    padding: 0.65rem 0.25rem 0.45rem;
  }

  .promo-piece-img {
    width: 46px;
    height: 46px;
  }

  .promo-piece-label {
    font-size: 0.75rem;
  }
}



/* ===== Historia (añadido sobre base buena, sin tocar el resto) ===== */
.page-historia .history-topbar .nav-link.active{
  border-color: var(--gold);
  color: var(--gold);
}

.page-historia .history-hero{
  padding: 3.8rem 1rem 2.6rem;
  background:
    radial-gradient(circle at 18% 10%, rgba(123,155,217,.18), transparent 25%),
    radial-gradient(circle at 80% 18%, rgba(76,116,196,.16), transparent 28%),
    linear-gradient(180deg, rgba(17,30,55,.92), rgba(10,18,34,.94));
  border-bottom: 1px solid rgba(168,198,255,.12);
}

.page-historia .history-hero__inner{
  width: min(1100px, 100%);
  margin: 0 auto;
}

.page-historia .history-chip{
  display: inline-flex;
  align-items: center;
  padding: .45rem .85rem;
  border-radius: 999px;
  background: rgba(76,116,196,.18);
  border: 1px solid rgba(168,198,255,.16);
  color: #d9e7ff;
  font-size: .92rem;
  font-weight: 700;
  margin-bottom: .9rem;
}

.page-historia .history-hero h2{
  display: block !important;
  visibility: visible !important;
  margin: 0 0 .9rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.04;
  color: #f6f9ff;
}

.page-historia .history-hero p{
  max-width: 66ch;
  margin: 0;
  color: #cbdcf8;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.75;
}

.page-historia .history-page{
  width: min(1100px, calc(100% - 24px));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
}

.page-historia .history-intro-card{
  display: grid;
  grid-template-columns: 1.5fr .95fr;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.page-historia .history-intro-card > *,
.page-historia .history-card,
.page-historia .timeline-content{
  background: linear-gradient(180deg, rgba(19,31,54,.94), rgba(11,19,34,.97));
  border: 1px solid rgba(168,198,255,.12);
  border-radius: 20px;
  box-shadow: 0 16px 40px rgba(0,0,0,.18);
}

.page-historia .history-intro-card > *{
  padding: 1.35rem 1.25rem;
}

.page-historia .history-intro-card h3,
.page-historia .history-card h3,
.page-historia .timeline-content h4{
  margin-top: 0;
  color: #f6f9ff;
}

.page-historia .history-intro-card p,
.page-historia .history-card p,
.page-historia .timeline-content p{
  color: #c8dbf8;
  line-height: 1.72;
}

.page-historia .history-quote{
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-historia .history-quote__mark{
  font-size: 3rem;
  line-height: 1;
  color: #8cb7ff;
  margin-bottom: .7rem;
}

.page-historia .history-section{
  margin-top: 2rem;
}

.page-historia .history-section__head{
  margin-bottom: 1rem;
}

.page-historia .section-kicker{
  display: inline-block;
  margin-bottom: .45rem;
  color: #9ec2ff;
  font-weight: 800;
  font-size: .82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.page-historia .history-section__head h3{
  margin: 0 0 .45rem;
  color: #f7faff;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

.page-historia .history-section__head p{
  margin: 0;
  color: #bfd3f3;
  line-height: 1.7;
}

.page-historia .timeline{
  position: relative;
  padding-left: 1.25rem;
}

.page-historia .timeline::before{
  content: "";
  position: absolute;
  left: .42rem;
  top: .4rem;
  bottom: .4rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(127,176,255,.55), rgba(47,74,125,.24));
}

.page-historia .timeline-item{
  position: relative;
  padding-left: 1.45rem;
  margin-bottom: 1rem;
}

.page-historia .timeline-dot{
  position: absolute;
  left: -.08rem;
  top: .4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(180deg, #7fb0ff, #4c74c4);
  box-shadow: 0 0 0 4px rgba(76,116,196,.16);
}

.page-historia .timeline-dot--current{
  background: linear-gradient(180deg, #ffd37a, #c7a768);
  box-shadow: 0 0 0 4px rgba(199,167,104,.18);
}

.page-historia .timeline-content{
  position: relative;
  padding: 1rem 1rem .95rem;
}

.page-historia .timeline-content::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:4px;
  border-radius:20px 0 0 20px;
  background: linear-gradient(180deg, #7fb0ff, #2f4a7d);
}

.page-historia .timeline-content--current::before{
  background: linear-gradient(180deg, #ffd37a, #c7a768);
}

.page-historia .timeline-year{
  display: inline-block;
  margin-bottom: .45rem;
  color: #9ec2ff;
  font-weight: 800;
  font-size: .92rem;
}

.page-historia .history-cards{
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.page-historia .history-card{
  padding: 1.25rem 1.15rem;
}

.page-historia .history-card--cta .btn{
  margin-top: .35rem;
}

@media (max-width: 991.98px){
  .page-historia .history-intro-card,
  .page-historia .history-cards{
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767.98px){
  .page-historia .history-hero{
    padding: 3rem 1rem 2.2rem;
  }

  .page-historia .history-page{
    width: min(100%, calc(100% - 18px));
    padding-top: 1.2rem;
  }

  .page-historia .history-intro-card > *,
  .page-historia .history-card,
  .page-historia .timeline-content{
    border-radius: 18px;
  }

  .page-historia .timeline{
    padding-left: 1rem;
  }

  .page-historia .timeline-item{
    padding-left: 1.15rem;
  }

  .page-historia .timeline-content::before{
    width: 3px;
  }
}


/* ===== FIX puntual · card-body del curso interior ===== */
/* Solo mejora contraste en lecciones/curso interior, sin tocar el resto */
body[class*="curso"] .card .card-body,
body[class*="leccion"] .card .card-body,
.curso-leccion .card .card-body,
.leccion-page .card .card-body,
main .card .card-body {
  background: linear-gradient(180deg, rgba(19,31,54,.94), rgba(11,19,34,.97)) !important;
  color: #eaf1ff !important;
}

body[class*="curso"] .card .card-body p,
body[class*="curso"] .card .card-body li,
body[class*="curso"] .card .card-body span,
body[class*="curso"] .card .card-body div,
body[class*="leccion"] .card .card-body p,
body[class*="leccion"] .card .card-body li,
body[class*="leccion"] .card .card-body span,
body[class*="leccion"] .card .card-body div,
.curso-leccion .card .card-body p,
.curso-leccion .card .card-body li,
.curso-leccion .card .card-body span,
.curso-leccion .card .card-body div,
.leccion-page .card .card-body p,
.leccion-page .card .card-body li,
.leccion-page .card .card-body span,
.leccion-page .card .card-body div,
main .card .card-body p,
main .card .card-body li,
main .card .card-body span,
main .card .card-body div {
  color: #cbdcf8 !important;
}

body[class*="curso"] .card .card-body h1,
body[class*="curso"] .card .card-body h2,
body[class*="curso"] .card .card-body h3,
body[class*="curso"] .card .card-body h4,
body[class*="leccion"] .card .card-body h1,
body[class*="leccion"] .card .card-body h2,
body[class*="leccion"] .card .card-body h3,
body[class*="leccion"] .card .card-body h4,
.curso-leccion .card .card-body h1,
.curso-leccion .card .card-body h2,
.curso-leccion .card .card-body h3,
.curso-leccion .card .card-body h4,
.leccion-page .card .card-body h1,
.leccion-page .card .card-body h2,
.leccion-page .card .card-body h3,
.leccion-page .card .card-body h4,
main .card .card-body h1,
main .card .card-body h2,
main .card .card-body h3,
main .card .card-body h4 {
  color: #f6f9ff !important;
}

body[class*="curso"] .card .card-body a,
body[class*="leccion"] .card .card-body a,
.curso-leccion .card .card-body a,
.leccion-page .card .card-body a,
main .card .card-body a {
  color: #9fc3ff !important;
}


/* ===== Navegación superior unificada del curso ===== */
:root {
  --gold: #d8b36b;
}

.site-header.history-topbar{
  width:min(1100px, calc(100% - 24px));
  margin:18px auto 0;
  padding:14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background:linear-gradient(180deg, rgba(18,31,61,.94), rgba(10,18,34,.94));
  border:1px solid rgba(168,198,255,.14);
  border-radius:20px;
  box-shadow:var(--cc-shadow);
}

.site-header .brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}

.site-header .logo{
  width:42px;
  height:42px;
  border-radius:12px;
  display:grid;
  place-items:center;
  font-size:24px;
  background:linear-gradient(180deg, rgba(77,141,255,.24), rgba(82,214,255,.12));
  border:1px solid rgba(168,198,255,.16);
  color:#fff;
  flex:0 0 auto;
}

.site-header .title{
  margin:0;
  font-size:clamp(1.15rem, 2.2vw, 1.45rem);
  color:#fff;
  letter-spacing:.02em;
  white-space:nowrap;
}

.site-header .title span{
  color:var(--gold);
}

.top-nav{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

.top-nav .nav-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:40px;
  padding:9px 14px;
  border-radius:999px;
  color:var(--cc-text-soft);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(168,198,255,.10);
  font-weight:700;
  line-height:1;
  transition:transform .15s ease, background-color .15s ease, border-color .15s ease, color .15s ease;
}

.top-nav .nav-link:hover,
.top-nav .nav-link:focus{
  color:#fff;
  background:rgba(77,141,255,.14);
  border-color:rgba(168,198,255,.28);
  transform:translateY(-1px);
}

.top-nav .nav-link.active{
  color:#fff;
  background:rgba(77,141,255,.22);
  border-color:rgba(168,198,255,.36);
}

.btn-solid{
  background:linear-gradient(180deg, var(--cc-primary), var(--cc-primary-strong));
  color:#fff;
  border:1px solid rgba(168,198,255,.22);
}

.btn-solid:hover,
.btn-solid:focus{
  color:#fff;
  background:linear-gradient(180deg, #5d98ff, #2e6fe8);
}

.btn-sm{
  min-height:40px;
  padding:.65rem 1rem;
  font-size:.92rem;
}

@media (max-width: 860px){
  .site-header.history-topbar{
    width:min(100%, calc(100% - 18px));
    padding:14px;
    flex-direction:column;
    align-items:flex-start;
  }

  .site-header .title{
    white-space:normal;
  }

  .top-nav{
    width:100%;
    justify-content:flex-start;
  }
}

@media (max-width: 560px){
  .top-nav{
    display:grid;
    grid-template-columns:1fr 1fr;
    width:100%;
  }

  .top-nav .nav-link,
  .top-nav .btn{
    width:100%;
  }
}