/* =========================
   EJERCICIOS (prefijo ej-)
========================= */

/* Hero */
.ej-hero {
  background: #000;
  padding: 5rem 0 4rem;
  text-align: center;
}

.ej-hero-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-inner-padding);
}

.ej-hero-eyebrow {
  font-family: var(--font-body);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.ej-hero-title {
  font-family: var(--font-headings);
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.05;
  margin-bottom: 1.25rem;
  letter-spacing: -.02em;
}

.ej-hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,.55);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.65;
}

/* Buscador global (hero) */
.ej-global-search-wrap {
  margin-top: 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Resultados globales */
.ej-global-results {
  background: var(--bg-dark);
  padding: var(--section-padding);
}

.ej-global-results-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-inner-padding);
}

.ej-global-results-count {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 1.5rem;
}

.ej-global-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

/* Card resultado */
.ej-global-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-align: left;
  cursor: pointer;
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
  padding: 0;
}

.ej-global-card:hover {
  border-color: rgba(var(--color-accent-rgb), .45);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,.5);
}

.ej-global-card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #111;
  flex-shrink: 0;
}

.ej-global-card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(.85);
  transition: filter 250ms ease, transform 250ms ease;
}

.ej-global-card:hover .ej-global-card-thumb {
  filter: brightness(1);
  transform: scale(1.04);
}

.ej-global-card-thumb--placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.2);
  font-size: 1.6rem;
}

.ej-global-card-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.3);
  transition: background 250ms ease;
}

.ej-global-card:hover .ej-global-card-play { background: rgba(0,0,0,.15); }

.ej-global-card-play .bi {
  font-size: 2rem;
  color: rgba(255,255,255,.85);
  filter: drop-shadow(0 2px 6px rgba(0,0,0,.6));
  transition: transform 200ms ease;
}

.ej-global-card:hover .ej-global-card-play .bi { transform: scale(1.15); }

.ej-global-card-body {
  padding: .9rem 1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.ej-global-card-cat {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.ej-global-card-name {
  font-size: .9rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin: 0;
}

/* Botón cargar más */
.ej-load-more-wrap {
  text-align: center;
  margin-top: 2rem;
}

.ej-load-more-btn {
  background: transparent;
  border: 1px solid rgba(var(--color-accent-rgb), .4);
  border-radius: 50px;
  color: var(--color-accent);
  font-size: .85rem;
  font-weight: 600;
  padding: .6rem 1.75rem;
  cursor: pointer;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
}

.ej-load-more-btn:hover {
  background: rgba(var(--color-accent-rgb), .1);
  border-color: var(--color-accent);
}

/* Categorías grid */
.ej-cats {
  background: var(--bg-dark);
  padding: var(--section-padding);
}

.ej-cats-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-inner-padding);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.ej-cat-card {
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}

.ej-cat-card:hover {
  border-color: rgba(var(--color-accent-rgb), .45);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,.5);
}

/* Thumbnail */
.ej-cat-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #111;
}

.ej-cat-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(.5) brightness(.85);
  transition: filter 250ms ease, transform 250ms ease;
}

.ej-cat-card:hover .ej-cat-thumb img {
  filter: grayscale(0) brightness(1);
  transform: scale(1.04);
}

.ej-cat-thumb-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1a1a 0%, #111 100%);
}

.ej-cat-thumb-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.3);
  transition: background 250ms ease;
}

.ej-cat-card:hover .ej-cat-thumb-overlay {
  background: rgba(0,0,0,.15);
}

.ej-cat-thumb-overlay .bi {
  font-size: 2.5rem;
  color: rgba(255,255,255,.8);
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.6));
  transition: color 250ms ease, transform 250ms ease;
}

.ej-cat-card:hover .ej-cat-thumb-overlay .bi {
  color: #fff;
  transform: scale(1.1);
}

/* Body */
.ej-cat-body {
  padding: 1.25rem 1.25rem .75rem;
  flex: 1;
}

.ej-cat-name {
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: .3rem;
  line-height: 1.3;
}

.ej-cat-count {
  font-size: .78rem;
  color: rgba(255,255,255,.4);
  margin-bottom: 0;
}

.ej-cat-arrow {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  color: rgba(var(--color-accent-rgb), .35);
  font-size: .9rem;
  transition: color 200ms ease, transform 200ms ease;
}

.ej-cat-card:hover .ej-cat-arrow {
  color: var(--color-accent);
  transform: translateX(3px);
}

/* =========================
   CATEGORÍA (ej-cat-hero, ej-list)
========================= */

/* Hero categoría */
.ej-cat-hero {
  background: #000;
  padding: 4rem 0 3rem;
}

.ej-cat-hero-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--section-inner-padding);
}

.ej-breadcrumb {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-body);
  font-size: .8rem;
  margin-bottom: 1.25rem;
}

.ej-breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}

.ej-breadcrumb a:hover { text-decoration: underline; }

.ej-breadcrumb .bi {
  font-size: .65rem;
  color: rgba(255,255,255,.3);
}

.ej-breadcrumb span {
  color: rgba(255,255,255,.5);
}

.ej-cat-title {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -.02em;
  margin-bottom: .5rem;
}

.ej-cat-subtitle {
  font-size: .85rem;
  color: rgba(255,255,255,.4);
  margin-bottom: 0;
}

/* Sección lista */
.ej-list-section {
  background: var(--bg-dark);
  padding: var(--section-padding);
}

.ej-list-inner {
  max-width: 740px;
  margin: 0 auto;
  padding: var(--section-inner-padding);
}

/* Buscador */
.ej-search-wrap {
  margin-bottom: 2rem;
}

.ej-search-label {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin-bottom: .5rem;
}

.ej-search-field {
  position: relative;
}

.ej-search-icon {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,.35);
  font-size: .9rem;
  pointer-events: none;
}

.ej-search-input {
  width: 100%;
  background: var(--bg-surface) !important;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 50px;
  color: #fff !important;
  font-size: .9rem;
  padding: .65rem 1.25rem .65rem 2.75rem !important;
  outline: none;
  transition: border-color 150ms ease, box-shadow 150ms ease;
  -webkit-appearance: none;
}

.ej-search-input::placeholder { color: rgba(255,255,255,.3); }

.ej-search-input:focus {
  border-color: rgba(var(--color-accent-rgb), .5);
  box-shadow: 0 0 0 3px rgba(var(--color-accent-rgb), .1);
}

/* Lista ejercicios */
.ej-list {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.ej-ex-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: .75rem 1.25rem .75rem .75rem;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 12px;
  text-decoration: none;
  transition: border-color 150ms ease, background 150ms ease;
}

.ej-ex-row:hover {
  border-color: rgba(var(--color-accent-rgb), .3);
  background: #1f1f1f;
}

.ej-ex-thumb {
  width: 120px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  display: block;
}

.ej-ex-thumb--placeholder {
  background: #222;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.2);
  font-size: 1.4rem;
}

.ej-ex-name {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
}

.ej-ex-arrow {
  flex-shrink: 0;
  font-size: .85rem;
  color: rgba(255,255,255,.25);
  transition: color 150ms ease, transform 150ms ease;
}

.ej-ex-row:hover .ej-ex-arrow {
  color: var(--color-accent);
  transform: translateX(3px);
}

/* Sin resultados */
.ej-no-results {
  text-align: center;
  color: rgba(255,255,255,.4);
  font-size: .9rem;
  padding: 2rem 0;
}

/* Fila como botón — reset */
button.ej-ex-row {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid rgba(255,255,255,.06);
  text-align: left;
  cursor: pointer;
}

/* Modal vídeo */
.ej-modal-content {
  background: #0a0a0a;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  overflow: hidden;
}

.ej-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.ej-modal-title {
  font-size: .95rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
  line-height: 1.3;
}

.ej-modal-close {
  background: none;
  border: none;
  color: rgba(255,255,255,.5);
  font-size: 1rem;
  padding: .25rem;
  line-height: 1;
  cursor: pointer;
  transition: color 150ms ease;
  flex-shrink: 0;
}

.ej-modal-close:hover { color: #fff; }

/* Responsive */
@media (max-width: 991.98px) {
  .ej-cats-inner,
  .ej-global-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: var(--section-inner-padding-mobile);
  }

  .ej-cats-inner { padding: var(--section-inner-padding-mobile); }
}

@media (max-width: 767.98px) {
  .ej-hero {
    padding: 3.5rem 0 3rem;
  }

  .ej-hero-inner,
  .ej-cat-hero-inner,
  .ej-list-inner,
  .ej-global-results-inner {
    padding: var(--section-inner-padding-mobile);
  }

  .ej-global-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: .75rem;
    padding: 0;
  }

  .ej-global-card-name { font-size: .82rem; }

  .ej-cat-hero { padding: 3rem 0 2.5rem; }

  .ej-ex-thumb { width: 88px; }
  .ej-ex-name  { font-size: .9rem; }
}

@media (max-width: 380px) {
  .ej-cats-inner {
    grid-template-columns: 1fr;
  }
}