/* assets/css/videos.css */

/* ---------- Layout base ---------- */
.videos-wrap{
  padding: 2rem;
  margin: 1.5rem auto;
  max-width: 1120px;
}

.empty-state{
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 18px;
  padding: 2rem 1.25rem;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}

.muted{ color: rgba(0,0,0,.65); }

/* ---------- Hero listado ---------- */
.videos-hero{
  border-bottom: 3px solid var(--amarillo-logo);
  background:
    radial-gradient(900px 280px at 20% -20%, rgba(255,200,0,.25), transparent 55%),
    radial-gradient(900px 280px at 80% -10%, rgba(181,18,27,.14), transparent 60%),
    linear-gradient(180deg, rgba(11,37,69,.06), transparent 70%),
    var(--blanco);
  padding: 4rem 1.25rem 2.25rem;
}

.videos-hero__inner{
  max-width: 1120px;
  margin: 0 auto;
  text-align: center;
}

.videos-hero h1{
  margin: 0 0 .6rem 0;
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  color: var(--azul-marino);
  letter-spacing: -0.02em;
}

.videos-hero p{
  margin: 0 auto;
  max-width: 900px;
  font-size: 1.08rem;
  color: rgba(0,0,0,.7);
}

/* ---------- Buscador ---------- */
.videos-search{
  margin: 1.25rem auto 0;
  display:flex;
  gap: .65rem;
  justify-content:center;
  align-items:center;
  flex-wrap: wrap;
}

.videos-search__field{
  display:flex;
  align-items:center;
  gap: .6rem;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(0,0,0,.10);
  border-radius: 999px;
  padding: .75rem 1rem;
  box-shadow: 0 10px 25px rgba(0,0,0,.06);
  width: min(640px, 100%);
}

.videos-search__icon{
  opacity: .65;
  font-weight: 700;
}

.videos-search input{
  border: 0;
  outline: none;
  width: 100%;
  background: transparent;
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
}

.btn-secondary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: .85rem 1.05rem;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.14);
  background: #fff;
  color: var(--azul-marino);
  text-decoration:none;
  font-weight: 600;
  transition: transform .18s ease, box-shadow .18s ease;
}

.btn-secondary:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
}

.btn-secondary.small{
  padding: .65rem .95rem;
  font-size: .95rem;
}

.btn-secondary.full{
  width: 100%;
}

/* ---------- Tags chips ---------- */
.videos-tags{
  display:flex;
  gap: .5rem;
  flex-wrap: wrap;
  justify-content:center;
  margin-top: 1.1rem;
}

.tag-chip{
  display:inline-block;
  padding: .45rem .85rem;
  border-radius: 999px;
  background: rgba(255,255,255,.9);
  color: var(--azul-marino);
  text-decoration:none;
  border: 1px solid rgba(0,0,0,.10);
  font-size: .95rem;
  box-shadow: 0 8px 20px rgba(0,0,0,.05);
}

.tag-chip.active{
  background: var(--amarillo-logo);
  border-color: rgba(0,0,0,.14);
}

/* ---------- Grid cards ---------- */
.videos-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.vcard{
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 18px;
  overflow:hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
  transition: transform .18s ease, box-shadow .18s ease;
  display:grid;
  grid-template-columns: 1fr;
}

.vcard:hover{
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0,0,0,.10);
}

/* Thumbnail 16:9 */
.vcard__thumb{
  position: relative;
  display:block;
  background: #0b2545;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.vcard__thumb img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display:block;
  transform: scale(1.01);
}

.vcard__badge{
  position:absolute;
  inset:auto auto 14px 14px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(181,18,27,.95);
  color: #fff;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(0,0,0,.25);
  border: 2px solid rgba(255,255,255,.6);
}

/* Body */
.vcard__body{
  padding: 1rem 1rem 1.1rem;
}

.vcard__meta{
  display:flex;
  align-items:center;
  gap: .5rem;
  color: rgba(0,0,0,.62);
  font-size: .92rem;
  margin-bottom: .4rem;
}

.dot{ opacity: .7; }

.vcard__title{
  margin: 0 0 .45rem 0;
  font-size: 1.25rem;
  letter-spacing: -0.015em;
}

.vcard__title a{
  color: var(--azul-marino);
  text-decoration:none;
}

.vcard__excerpt{
  margin: 0 0 .75rem 0;
  color: rgba(0,0,0,.75);
}

.vcard__tags{
  display:flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: .9rem;
}

.mini-tag{
  display:inline-flex;
  padding: .28rem .65rem;
  border-radius: 999px;
  background: rgba(11,37,69,.06);
  border: 1px solid rgba(11,37,69,.14);
  text-decoration:none;
  color: var(--azul-marino);
  font-size: .92rem;
  font-weight: 600;
}

.vcard__actions{
  display:flex;
  gap: .6rem;
  flex-wrap: wrap;
}

.cta-button.small{
  padding: .65rem 1rem;
  font-size: .95rem;
}

/* ---------- Single (entrada) ---------- */
.single-hero{
  border-bottom: 3px solid var(--amarillo-logo);
  background:
    radial-gradient(900px 280px at 15% -20%, rgba(255,200,0,.24), transparent 55%),
    radial-gradient(900px 280px at 85% -10%, rgba(181,18,27,.12), transparent 60%),
    linear-gradient(180deg, rgba(11,37,69,.06), transparent 70%),
    var(--blanco);
  padding: 3.25rem 1.25rem 2rem;
}

.single-hero__inner{
  max-width: 1120px;
  margin: 0 auto;
}

.back-link{
  display:inline-block;
  margin-bottom: .9rem;
  text-decoration:none;
  color: var(--azul-marino);
  font-weight: 700;
  opacity: .9;
}

.single-hero__meta{
  display:flex;
  flex-wrap: wrap;
  gap: .55rem;
  color: rgba(0,0,0,.62);
  margin-bottom: .55rem;
}

.single-title{
  margin: 0 0 .6rem 0;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  color: var(--azul-marino);
  letter-spacing: -0.02em;
}

.single-excerpt{
  margin: 0;
  max-width: 900px;
  color: rgba(0,0,0,.75);
  font-size: 1.08rem;
}

.single-tags{
  display:flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: .95rem;
}

/* Grid single */
.videos-wrap.single{
  padding-top: 1.25rem;
}

.single-grid{
  display:grid;
  grid-template-columns: 1fr 340px;
  gap: 1rem;
  align-items:start;
}

.video-frame{
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow:hidden;
  background:#000;
  box-shadow: 0 14px 40px rgba(0,0,0,.10);
  border: 1px solid rgba(0,0,0,.10);
}

.video-frame iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
}

.reading-card{
  margin-top: 1rem;
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 18px;
  padding: 1.1rem 1.1rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}

.reading-card h2{
  margin: 0 0 .75rem 0;
  color: var(--azul-marino);
  letter-spacing: -0.01em;
}

.reading{
  font-size: 1.03rem;
  color: rgba(0,0,0,.80);
  line-height: 1.75;
}

.reading-p{
  margin: 0 0 .85rem 0;
}

/* Mejor matemáticas/exponentes */
.math{
  font-family: 'Poppins', sans-serif;
}
.math sup{
  font-size: .78em;
  vertical-align: super;
}

/* Callouts (Tip / Ejemplo) */
.callout{
  border-radius: 16px;
  padding: .9rem 1rem;
  margin: 0 0 .95rem 0;
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 10px 30px rgba(0,0,0,.05);
}

.callout__title{
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: .25rem;
}

.callout__text{
  color: rgba(0,0,0,.82);
  line-height: 1.7;
}

.callout--tip{
  background: rgba(255,200,0,.16);
  border-color: rgba(255,200,0,.35);
}

.callout--example{
  background: rgba(11,37,69,.06);
  border-color: rgba(11,37,69,.14);
}

.reading-actions{
  display:flex;
  gap: .6rem;
  flex-wrap: wrap;
  margin-top: .8rem;
}

/* Sidebar */
.side-card{
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 18px;
  padding: 1rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}

.side-card + .side-card{
  margin-top: 1rem;
}

.side-thumb{
  aspect-ratio: 16 / 9;
  border-radius: 14px;
  overflow:hidden;
  background: #0b2545;
  border: 1px solid rgba(0,0,0,.10);
}

.side-thumb img{
  width:100%;
  height:100%;
  object-fit: cover;
  display:block;
}

.side-list{
  margin: .6rem 0 0 1.1rem;
  color: rgba(0,0,0,.78);
}

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .videos-grid{
    grid-template-columns: 1fr;
  }
  .single-grid{
    grid-template-columns: 1fr;
  }
}
@media (max-width: 560px){
  .videos-wrap{ padding: 1.25rem; }
  .videos-hero{ padding: 2.5rem 1rem 1.75rem; }
}