.todos {
  max-width: 1400px;
  margin: 40px auto 60px;
  padding: 0 20px;
  position: relative;
  z-index: 2;
}

.cursos-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 30px;
  align-items: start;
}


.sidebar {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.filter-btn {
  background: #505050b5;
  border: none;
  padding: 15px 25px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  overflow: hidden;
  color: rgb(255, 255, 255);
}

.filter-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #b9b8b8, #e6e6e6 );
  transition: width 0.3s ease;
  z-index: 0;
}

.filter-btn span {
  position: relative;
  z-index: 1;
}
#todoss img{
    width: 40px;   
    object-fit: contain;
    filter: grayscale(100%) brightness(0) invert(1);
}
.filter-btn img{
    width: 40px;   
    object-fit: contain;
    
}
.filter-btn.active::before {
  width: 100%;
}

.filter-btn.active {
  color: white;
  transform: translateX(5px);
}

.filter-btn:hover {
  transform: translateX(5px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* Grid de cursos */
.cursos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 25px;
}

/* Tarjetas de curso */
.curso-card {
  background: white;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.4s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.curso-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.curso-imagen {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.curso-imagen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.curso-card:hover .curso-imagen img {
  transform: scale(1.1);
}

.curso-badge {
  position: absolute;
  top: 15px;
  left: 15px;
  background: rgba(251, 191, 36, 0.95);
  color: #000;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.curso-fecha {
  position: absolute;
  bottom: 15px;
  left: 15px;
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 8px 15px;
  border-radius: 25px;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.curso-info {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.curso-titulo {
  font-size: 1.3rem;
  font-weight: 700;
  color: #1f2937;
  margin-bottom: 15px;
  line-height: 1.4;
}

.curso-tipo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ede9fe;
  color: #7c3aed;
  padding: 8px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 15px;
  width: fit-content;
}

.curso-descripcion {
  color: #6b7280;
  font-size: 0.95rem;
  line-height: 1.6;
  margin-top: auto;
  display: -webkit-box;

  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Responsive */
@media (max-width: 1024px) {
  .cursos-container {
    grid-template-columns: 1fr;
  }

  .sidebar {
    flex-direction: row;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 10px;
  }

  .filter-btn {
    white-space: nowrap;
    min-width: 150px;
  }
}

@media (max-width: 768px) {
  .cursos-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .curso-card {
    border-radius: 15px;
  }

  .curso-info {
    padding: 20px;
  }
}
.curso-card {
  opacity: 0;
  transform: translateY(30px);
}

.curso-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.6s ease;
}
/* ============================================
   RESPONSIVE - TABLET Y MÓVILES
   ============================================ */

/* Tablet Grande (1024px - 768px) */
@media (max-width: 1024px) {
  .todos {
    margin: 30px auto 50px;
    padding: 0 15px;
  }

  .cursos-container {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  /* Sidebar horizontal en tablet */
  .sidebar {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 12px;
    padding-bottom: 15px;
    scrollbar-width: thin;
    scrollbar-color: #b9b8b8 #f1f1f1;
  }

  .sidebar::-webkit-scrollbar {
    height: 8px;
  }

  .sidebar::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
  }

  .sidebar::-webkit-scrollbar-thumb {
    background: #b9b8b8;
    border-radius: 10px;
  }

  .filter-btn {
    white-space: nowrap;
    min-width: 180px;
    padding: 12px 20px;
    font-size: 1rem;
  }

  .filter-btn img,
  #todoss img {
    width: 35px;
  }

  .cursos-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
  }

  .curso-imagen {
    height: 200px;
  }

  .curso-titulo {
    font-size: 1.2rem;
  }
}

/* Tablet Pequeña (768px - 600px) */
@media (max-width: 768px) {
  .todos {
    margin: 25px auto 40px;
    padding: 0 12px;
  }

  .cursos-container {
    gap: 20px;
  }

  .sidebar {
    gap: 10px;
    padding-bottom: 12px;
  }

  .filter-btn {
    min-width: 160px;
    padding: 10px 18px;
    font-size: 0.95rem;
  }

  .filter-btn img,
  #todoss img {
    width: 32px;
  }

  .cursos-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 18px;
  }

  .curso-card {
    border-radius: 12px;
  }

  .curso-imagen {
    height: 180px;
  }

  .curso-badge {
    top: 12px;
    left: 12px;
    padding: 5px 10px;
    font-size: 0.7rem;
  }

  .curso-fecha {
    bottom: 12px;
    left: 12px;
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  .curso-info {
    padding: 20px;
  }

  .curso-titulo {
    font-size: 1.15rem;
    margin-bottom: 12px;
  }

  .curso-tipo {
    padding: 6px 12px;
    font-size: 0.8rem;
    margin-bottom: 12px;
  }

  .curso-descripcion {
    font-size: 0.9rem;
  }
}

/* Móvil Grande (600px - 480px) */
@media (max-width: 600px) {
  .todos {
    margin: 20px auto 35px;
    padding: 0 10px;
  }

  .sidebar {
    gap: 8px;
    padding-bottom: 10px;
  }

  .filter-btn {
    min-width: 140px;
    padding: 10px 15px;
    font-size: 0.9rem;
  }

  .filter-btn img,
  #todoss img {
    width: 28px;
  }

  .cursos-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .curso-card:hover {
    transform: translateY(-5px);
  }

  .curso-imagen {
    height: 200px;
  }
}

/* Móvil Pequeño (480px - 360px) */
@media (max-width: 480px) {
  .todos {
    margin: 15px auto 30px;
    padding: 0 8px;
  }

  .cursos-container {
    gap: 15px;
  }

  .sidebar {
    gap: 8px;
  }

  .filter-btn {
    min-width: 130px;
    padding: 8px 12px;
    font-size: 0.85rem;
    gap: 8px;
  }

  .filter-btn img,
  #todoss img {
    width: 25px;
  }

  .curso-card {
    border-radius: 10px;
  }

  .curso-imagen {
    height: 180px;
  }

  .curso-badge {
    top: 10px;
    left: 10px;
    padding: 4px 8px;
    font-size: 0.65rem;
  }

  .curso-fecha {
    bottom: 10px;
    left: 10px;
    padding: 5px 10px;
    font-size: 0.75rem;
    gap: 6px;
  }

  .curso-info {
    padding: 18px;
  }

  .curso-titulo {
    font-size: 1.1rem;
    margin-bottom: 10px;
  }

  .curso-tipo {
    padding: 5px 10px;
    font-size: 0.75rem;
    gap: 6px;
    margin-bottom: 10px;
  }

  .curso-descripcion {
    font-size: 0.85rem;
    line-height: 1.5;
  }
}

/* Móvil Extra Pequeño (menos de 360px) */
@media (max-width: 360px) {
  .todos {
    margin: 12px auto 25px;
    padding: 0 6px;
  }

  .filter-btn {
    min-width: 120px;
    padding: 8px 10px;
    font-size: 0.8rem;
  }

  .filter-btn img,
  #todoss img {
    width: 22px;
  }

  .curso-imagen {
    height: 160px;
  }

  .curso-info {
    padding: 15px;
  }

  .curso-titulo {
    font-size: 1rem;
  }

  .curso-tipo {
    font-size: 0.7rem;
  }

  .curso-descripcion {
    font-size: 0.8rem;
  }
}