* {

     margin: 0;
     padding: 0;
     box-sizing: border-box;
}

html {

     scroll-behavior: smooth;

     -webkit-tap-highlight-color: transparent;
}

/* =========================
   BODY
========================= */

body {

     min-height: 100vh;

     padding: 30px;

     overflow-x: hidden;

     font-family: "Poppins", sans-serif;

     color: white;

     position: relative;

     background: #000;
}

/* =========================
   FONDO (FIX REAL)
========================= */

.bg {

     position: fixed;

     inset: 0;

     background-image:
          url("imagenes/fondo.jpg");

     background-size: cover;

     background-position: center;

     background-repeat: no-repeat;

     z-index: 0;
}

/* capa oscura suave */

.bg::after {

     content: "";

     position: absolute;

     inset: 0;

     background:
          rgba(0, 0, 0, 0.20);
}

/* =========================
   PARTICULAS
========================= */

.particles {

     position: fixed;

     inset: 0;

     pointer-events: none;

     z-index: 1;

     opacity: 0.35;

     background-image:

          radial-gradient(rgba(255, 255, 255, 0.18) 2px,
               transparent 2px);

     background-size: 60px 60px;

     animation:
          particlesMove 18s linear infinite;
}

@keyframes particlesMove {

     from {

          transform: translateY(0);
     }

     to {

          transform: translateY(-60px);
     }
}

/* =========================
   PAGE (IMPORTANTE)
========================= */

.page {

     position: relative;

     z-index: 2;

     max-width: 1400px;

     margin: auto;
}

/* =========================
   HEADER
========================= */

header {

     display: flex;

     justify-content: space-between;

     align-items: center;

     gap: 20px;

     flex-wrap: wrap;

     margin-bottom: 50px;

     animation: fadeDown 1s ease;
}

/* =========================
   TITULO
========================= */

h1 {

     font-size: 52px;

     font-weight: 800;

     text-shadow:
          0 5px 18px rgba(255, 182, 218, 0.5);
}

/* =========================
   BOTON VOLVER
========================= */

.back-btn {

     text-decoration: none;

     color: white;

     background:
          linear-gradient(135deg, #ff9ed6, #d98fff);

     padding: 14px 24px;

     border-radius: 18px;

     font-weight: 700;

     display: flex;

     align-items: center;

     gap: 10px;

     transition: 0.25s ease;
}

.back-btn:hover {

     transform: translateY(-3px);

     box-shadow:
          0 0 25px rgba(255, 255, 255, 0.4),
          0 0 45px rgba(255, 158, 214, 0.35);
}

/* =========================
   GRID
========================= */

.video-grid {

     display: grid;

     grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));

     gap: 35px;
}

/* =========================
   CARD
========================= */

.video-card {

     overflow: hidden;

     border-radius: 28px;

     background: rgba(255, 255, 255, 0.12);

     backdrop-filter: blur(16px);

     border: 1px solid rgba(255, 255, 255, 0.18);

     box-shadow: 0 10px 35px rgba(0, 0, 0, 0.18);

     transition: 0.35s ease;

     animation: fadeUp 0.8s ease both;
}

.video-card:hover {

     transform: translateY(-10px) scale(1.02);

     box-shadow:
          0 0 30px rgba(255, 255, 255, 0.25),
          0 0 60px rgba(255, 182, 218, 0.2);
}

/* =========================
   IMAGEN
========================= */

.video-card img {

     width: 100%;

     aspect-ratio: 16/9;

     object-fit: cover;

     display: block;

     transition: 0.4s ease;
}

.video-card:hover img {

     transform: scale(1.05);
}

/* =========================
   INFO
========================= */

.video-info {

     padding: 22px;
}

/* =========================
   TITULO VIDEO
========================= */

.video-info h3 {

     font-size: 22px;

     line-height: 1.4;

     margin-bottom: 18px;

     font-weight: 700;
}

/* =========================
   BOTON VIDEO
========================= */

.video-info a {

     text-decoration: none;

     display: inline-flex;

     align-items: center;

     gap: 10px;

     background: linear-gradient(135deg, #ff9ed6, #d98fff);

     color: white;

     padding: 12px 20px;

     border-radius: 16px;

     font-weight: 700;

     transition: 0.25s ease;
}

.video-info a:hover {

     transform: translateY(-2px);

     box-shadow:
          0 0 25px rgba(255, 255, 255, 0.4),
          0 0 40px rgba(255, 158, 214, 0.35);
}

/* =========================
   ANIMACIONES
========================= */

@keyframes fadeUp {

     from {

          opacity: 0;

          transform: translateY(40px);
     }

     to {

          opacity: 1;

          transform: translateY(0);
     }
}

@keyframes fadeDown {

     from {

          opacity: 0;

          transform: translateY(-30px);
     }

     to {

          opacity: 1;

          transform: translateY(0);
     }
}

/* =========================
   RESPONSIVE
========================= */

@media(max-width:768px) {

     body {

          padding: 20px;
     }

     h1 {

          font-size: 38px;
     }
}

@media(max-width:480px) {

     body {

          padding: 16px;
     }

     h1 {

          font-size: 30px;
     }

     .back-btn {

          width: 100%;

          justify-content: center;
     }

     .video-grid {

          grid-template-columns: 1fr;
     }

     .video-info h3 {

          font-size: 18px;
     }

     .video-info a {

          width: 100%;

          justify-content: center;
     }
}