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

 html,
 body {
     height: 100%;
     font-family: 'Poppins', sans-serif;
     background: radial-gradient(circle at top, #0f2027, #203a43 60%, #2c5364 100%);
     color: #fff;
     overflow-x: hidden;
     scroll-behavior: smooth;
     transition: background 0.5s ease;
 }

 /* Ajuste especial para evitar que el contenido quede recortado en móviles */
 body {
     min-height: 100vh;
     min-height: -webkit-fill-available;
     /* iOS fix */
     display: flex;
     justify-content: center;
     align-items: center;
     padding: env(safe-area-inset-top, 20px) 20px env(safe-area-inset-bottom, 20px);
 }

 .container {
     position: relative;
     width: 100%;
     max-width: 420px;
     background: rgba(255, 255, 255, 0.08);
     backdrop-filter: blur(14px);
     border-radius: 22px;
     box-shadow: 0 10px 40px rgba(0, 255, 255, 0.15);
     text-align: center;
     overflow: hidden;
     animation: fadeIn 1s ease-in-out;
     transition: all 0.4s ease;
 }

 .bg-tech {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: url('https://images.unsplash.com/photo-1504384308090-c894fdcc538d?auto=format&fit=crop&w=1400&q=80') center/cover no-repeat;
     opacity: 0.25;
     filter: blur(4px);
     z-index: -1;
     transition: opacity 0.3s ease;
 }

 header {
     background: linear-gradient(135deg, #0072ff, #00c6ff);
     padding: 50px 20px 35px;
     border-bottom: 1px solid rgba(255, 255, 255, 0.1);
     position: relative;
 }

 header::after {
     content: '';
     position: absolute;
     bottom: 0;
     left: 50%;
     transform: translateX(-50%);
     width: 60%;
     height: 2px;
     background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.6), transparent);
 }

 header img {
     width: 90px;
     height: 90px;
     object-fit: contain;
     border-radius: 50%;
     margin-bottom: 12px;
     box-shadow: 0 0 25px rgba(255, 255, 255, 0.3);
     transition: transform 0.4s ease;
 }

 header img:hover {
     transform: scale(1.08);
 }

 header h1 {
     font-size: 1.9rem;
     font-weight: 700;
     margin-bottom: 8px;
     text-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
 }

 header p {
     font-size: 1rem;
     opacity: 0.9;
 }

 .features {
     padding: 25px 20px;
     text-align: left;
 }

 .features h2 {
     font-size: 1.25rem;
     color: #00d2ff;
     margin-bottom: 18px;
     text-transform: uppercase;
     letter-spacing: 1px;
     text-align: center;
     text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
 }

 .features ul {
     list-style: none;
     line-height: 1.7;
 }

 .features li {
     margin-bottom: 14px;
     font-size: 0.95rem;
     display: flex;
     align-items: center;
     gap: 10px;
     transition: transform 0.3s ease, color 0.3s ease;
 }

 .features li::before {
     content: "⚡";
     color: #00ffe0;
     font-size: 1.1rem;
     filter: drop-shadow(0 0 6px #00ffe0);
 }

 .features li:hover {
     transform: translateX(6px);
     color: #00e5ff;
 }


 .cta {
     padding: 20px;
     text-align: center;
 }

 .cta button,
 .cta a {
     display: inline-block;
     background: linear-gradient(90deg, #00d2ff, #3a7bd5);
     border: none;
     padding: 14px 40px;
     color: #fff;
     font-size: 1.05rem;
     font-weight: 600;
     border-radius: 50px;
     cursor: pointer;
     text-decoration: none;
     transition: all 0.3s ease;
     box-shadow: 0 0 15px rgba(0, 255, 255, 0.25);
 }

 .cta button:hover,
 .cta a:hover {
     transform: translateY(-3px);
     box-shadow: 0 0 25px rgba(0, 255, 255, 0.5);
     color: #fff;
     text-decoration: none;
 }

 footer {
     padding: 15px;
     font-size: 0.8rem;
     background: rgba(0, 0, 0, 0.3);
     border-top: 1px solid rgba(255, 255, 255, 0.1);
     text-align: center;
 }

 @keyframes fadeIn {
     from {
         opacity: 0;
         transform: scale(0.95);
     }

     to {
         opacity: 1;
         transform: scale(1);
     }
 }


 @media (max-width: 430px) and (max-height: 900px) {
     body {
         align-items: flex-start;
         padding-top: calc(env(safe-area-inset-top, 20px) + 10px);
     }

     .container {
         margin-top: 10px;
         margin-bottom: 15px;
         border-radius: 20px;
     }

     header {
         padding: 45px 20px 30px;
     }

     header img {
         width: 85px;
         height: 85px;
     }

     header h1 {
         font-size: 1.8rem;
     }

     .features {
         padding: 20px 18px;
     }

     .cta button,
     .cta a {
         padding: 13px 35px;
     }
 }


 @media (min-width: 900px) {
     body {
         padding: 60px;
     }

     .container {
         max-width: 800px;
         display: grid;
         grid-template-columns: 1fr 1.1fr;
         align-items: stretch;
         border-radius: 25px;
         box-shadow: 0 20px 60px rgba(0, 255, 255, 0.25);
     }

     header {
         display: flex;
         flex-direction: column;
         justify-content: center;
         text-align: center;
         border-right: 1px solid rgba(255, 255, 255, 0.1);
         padding: 60px 25px;
     }

     .features {
         padding: 50px 40px;
     }
 }