/* ============================================================
   Ciencia en el Cole — home.css  [DISEÑO ORIGINAL]
   Página principal con layout asimétrico y cards propias
   ============================================================ */

/* ══════════════════════════════════════════════════
   HERO — diseño propio con blob decorativo
══════════════════════════════════════════════════ */
.page-bg {
  background: var(--clr-bg);
  min-height: 100vh;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 0;
  background: linear-gradient(135deg, #0f0c29 0%, #1a1040 40%, #1e1b4b 70%, #1a0533 100%);
  width: 100%;
}

/* Animated background particles */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(108,99,255,.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,201,177,.15) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(236,72,153,.1) 0%, transparent 40%);
  pointer-events: none;
}

/* Dot grid overlay */
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.07) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.hero__inner {
  position: relative; z-index: 1;
  width: 100%;
  display: grid; 
  grid-template-columns: 1fr 520px;
  align-items: center;
  min-height: 520px;
  padding: 72px 60px 80px;
  gap: 48px;
  box-sizing: border-box;
}

/* Override text colors for dark background */
.hero__content { max-width: 560px }

.hero__pill {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(108,99,255,0.2);
  border: 1.5px solid rgba(108,99,255,0.5);
  color: #a5b4fc;
  font-size: 12px; font-weight: 700; letter-spacing: .6px;
  text-transform: uppercase;
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: #ffffff;
  margin-bottom: 16px;
}

.hero__title--accent {
  background: linear-gradient(90deg, #a78bfa, #38bdf8, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  color: rgba(255,255,255,0.65);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 480px;
}

/* ── Science Card Slider ── */
.hero__slider-wrap {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.hero__slider {
  display: flex;
  gap: 20px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.science-card {
  flex: 0 0 460px;
  border-radius: 24px;
  padding: 32px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.3s ease;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.science-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 180px; height: 180px;
  border-radius: 50%;
  opacity: 0.15;
}

.science-card--bio   { background: linear-gradient(135deg, #064e3b, #065f46); }
.science-card--bio::before { background: #34d399; }
.science-card--chem  { background: linear-gradient(135deg, #1e1b4b, #312e81); }
.science-card--chem::before { background: #818cf8; }
.science-card--phys  { background: linear-gradient(135deg, #0c4a6e, #075985); }
.science-card--phys::before { background: #38bdf8; }
.science-card--geo   { background: linear-gradient(135deg, #451a03, #78350f); }
.science-card--geo::before { background: #fbbf24; }
.science-card--anat  { background: linear-gradient(135deg, #4c0519, #881337); }
.science-card--anat::before { background: #fb7185; }

.science-card:hover { transform: translateY(-4px); }

.science-card__icon {
  font-size: 52px;
  margin-bottom: 16px;
  display: block;
  filter: drop-shadow(0 0 12px rgba(255,255,255,0.3));
  animation: floatIcon 3s ease-in-out infinite;
}
@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.science-card__subject {
  font-size: 11px; font-weight: 800; letter-spacing: 1.5px;
  text-transform: uppercase; color: rgba(255,255,255,0.5);
  margin-bottom: 8px;
}

.science-card__title {
  font-size: 22px; font-weight: 800; color: #ffffff;
  line-height: 1.2; margin-bottom: 14px;
}

.science-card__fact {
  font-size: 14px; line-height: 1.6;
  color: rgba(255,255,255,0.75);
  flex: 1; margin-bottom: 20px;
}

.science-card__tags {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.science-card__tags span {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  font-size: 11px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
}

.hero__slider-dots {
  display: flex; gap: 8px; justify-content: center;
  margin-top: 20px;
}
.hero__slider-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer; transition: all 0.3s ease;
  border: none;
}
.hero__slider-dot--active {
  background: #a78bfa;
  width: 24px; border-radius: 4px;
}

/* Override btn colors for dark background */
.hero .btn-primary {
  background: linear-gradient(135deg, #6c63ff, #8b5cf6);
  color: white;
  border: none;
}
.hero .btn-secondary {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.2);
}
.hero .btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  color: white;
  border-color: rgba(255,255,255,0.4);
}

.hero__title {
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 900; letter-spacing: -1.5px; line-height: 1.1;
  color: var(--clr-text); margin-bottom: 18px;
}

.hero__title span {
  background: linear-gradient(135deg, var(--clr-purple), var(--clr-teal));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 17px; color: var(--clr-muted); line-height: 1.7;
  margin-bottom: 36px; max-width: 480px;
}

.hero__actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap }

.btn-primary {
  display: inline-flex; align-items: center; gap: 9px;
  background: linear-gradient(135deg, var(--clr-purple), var(--clr-purple-dk));
  color: var(--clr-white);
  font-size: 14px; font-weight: 700;
  padding: 13px 28px; border-radius: var(--r-f);
  box-shadow: var(--sh-md);
  transition: var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--sh-lg) }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--clr-card); color: var(--clr-text);
  font-size: 14px; font-weight: 600;
  padding: 12px 24px; border-radius: var(--r-f);
  border: 1.5px solid var(--clr-border); transition: var(--ease);
}
.btn-secondary:hover { border-color: var(--clr-border2); background: var(--clr-purple-lt); color: var(--clr-purple) }

/* Estadísticas hero */
.hero__collage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
  width: 460px;
  height: 420px;
  transform: rotate(-3deg);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.hero__collage:hover {
  transform: rotate(0deg) scale(1.02);
}
.hero__collage-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  border: 4px solid var(--clr-card);
  transition: transform 0.3s ease;
}
.hero__collage-img:hover {
  transform: scale(1.05);
  z-index: 10;
}
.hero__collage-img:nth-child(1) {
  grid-column: 1 / 2;
  grid-row: 1 / 3;
  height: 90%;
  align-self: center;
}
.hero__collage-img:nth-child(2) {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  height: 110%;
  align-self: end;
}
.hero__collage-img:nth-child(3) {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
  height: 90%;
  align-self: start;
}

/* ══════════════════════════════════════════════════
   FILTROS — barra horizontal original
══════════════════════════════════════════════════ */
.catalog-section {
  max-width: 1180px; margin: 0 auto;
  padding: 0 40px 80px;
}

.filters-bar {
  display: flex; align-items: center;
  gap: 10px; margin-bottom: 36px;
  padding: 6px;
  background: var(--clr-card);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--r-lg);
  width: fit-content;
  box-shadow: var(--sh-sm);
}

.filter-chip {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600;
  padding: 8px 18px; border-radius: var(--r-md);
  color: var(--clr-muted); transition: var(--ease);
}
.filter-chip:hover { color: var(--clr-text); background: var(--clr-bg) }
.filter-chip--active {
  background: var(--clr-purple); color: var(--clr-white);
  box-shadow: 0 4px 12px rgba(108,99,255,.35);
}

.catalog-header { margin-bottom: 28px }
.catalog-title {
  font-size: 26px; font-weight: 800; color: var(--clr-text);
  letter-spacing: -.5px; margin-bottom: 4px;
}
.catalog-sub { font-size: 14px; color: var(--clr-muted) }

/* ══════════════════════════════════════════════════
   GRID DE LECCIONES — diseño propio 2/3 col
══════════════════════════════════════════════════ */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

/* ── Tarjeta de lección — diseño completamente original ─── */
.lesson-card {
  background: var(--clr-card);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--r-lg); overflow: hidden;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s cubic-bezier(.4,0,.2,1);
  display: flex; flex-direction: column;
  position: relative;
}
.lesson-card:hover { transform: translateY(-5px); box-shadow: var(--sh-lg) }

/* Banda de color en el borde izquierdo */
.lesson-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 4px;
  border-radius: 0;
  background: var(--card-accent, var(--clr-purple));
  transition: var(--ease);
}
.lesson-card:hover::before { width: 6px }

/* Zona de imagen */
.lesson-card__visual {
  height: 200px;
  position: relative; overflow: hidden;
  background: var(--card-bg, var(--clr-purple-lt));
  display: flex; align-items: center; justify-content: center;
}

.lesson-card__img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s cubic-bezier(.4,0,.2,1);
}
.lesson-card:hover .lesson-card__img { transform: scale(1.07) }

.lesson-card__emoji-fallback {
  font-size: 80px; opacity: .4;
}

/* Cinta superior derecha */
.lesson-card__ribbon {
  position: absolute; top: 14px; right: 14px;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(6px);
  border-radius: var(--r-f);
  padding: 4px 12px;
  font-size: 10.5px; font-weight: 700; letter-spacing: .7px;
  color: var(--card-accent, var(--clr-purple));
  text-transform: uppercase;
  box-shadow: var(--sh-sm);
}

/* Overlay de gradiente en la imagen */
.lesson-card__overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(30,27,75,.3), transparent);
}

/* Cuerpo */
.lesson-card__body { padding: 20px 22px 18px; flex: 1; display: flex; flex-direction: column }

.lesson-card__title {
  font-size: 19px; font-weight: 800; color: var(--clr-text);
  letter-spacing: -.4px; margin-bottom: 8px;
}

.lesson-card__desc {
  font-size: 13.5px; color: var(--clr-muted);
  line-height: 1.6; margin-bottom: 14px; flex: 1;
}

/* Tags de estructuras */
.lesson-card__tags { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 18px }
.lesson-card__tag {
  font-size: 11px; font-weight: 500;
  color: var(--clr-muted);
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-xs); padding: 3px 9px;
}

/* Footer de la tarjeta */
.lesson-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--clr-border);
}
.lesson-card__count {
  font-size: 12px; color: var(--clr-muted); font-weight: 500;
}

.lesson-card__cta {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 700;
  color: var(--card-accent, var(--clr-purple));
  padding: 7px 16px; border-radius: var(--r-f);
  background: transparent;
  border: 1.5px solid currentColor;
  transition: var(--ease);
}
.lesson-card:hover .lesson-card__cta {
  background: var(--card-accent, var(--clr-purple));
  color: var(--clr-white);
}

/* Estado vacío */
.empty-state {
  grid-column: 1/-1; text-align: center;
  padding: 64px 20px; color: var(--clr-muted);
}
.empty-state__icon { font-size: 52px; margin-bottom: 16px }
.empty-state__text { font-size: 16px; font-weight: 600 }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1000px) {
  .hero__inner { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .hero__content { margin-bottom: 32px; }
  .hero__collage { transform: scale(0.9); }
}
@media (max-width: 640px) {
  .hero { padding: 48px 20px 56px }
  .catalog-section { padding: 0 20px 60px }
  .lessons-grid { grid-template-columns: 1fr }
  .filters-bar { width: 100%; overflow-x: auto }
}