* {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }
 
 body {
     font-family: 'Poppins', sans-serif;
     background: linear-gradient(135deg, #1a1a2e, #16213e);
     height: 100vh;
     overflow: hidden;
     color: white;
     position: relative;
 }
 /* Rain container */
 
 .rain-container {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     z-index: 1;
     overflow: hidden;
 }
 
 .raindrop {
     position: absolute;
     width: 2px;
     height: 15px;
     background: linear-gradient(to bottom, rgba(255, 255, 255, 0.8), transparent);
     border-radius: 0 0 50% 50%;
     animation: fall linear infinite;
     z-index: 1;
 }
 
 @keyframes fall {
     to {
         transform: translateY(100vh);
     }
 }
 /* Main container */
 
 .container {
     position: relative;
     z-index: 2;
     display: flex;
     justify-content: center;
     align-items: center;
     height: 100vh;
     padding: 20px;
 }
 /* Logo card */
 
 .logo-card {
     background: rgba(255, 255, 255, 0.1);
     backdrop-filter: blur(10px);
     border-radius: 15px;
     padding: 40px;
     text-align: center;
     box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
     border: 1px solid rgba(255, 255, 255, 0.1);
     max-width: 500px;
     width: 100%;
     animation: fadeIn 1s ease-in-out;
     transition: all 0.3s ease;
 }
 
 @keyframes fadeIn {
     from {
         opacity: 0;
         transform: translateY(20px);
     }
     to {
         opacity: 1;
         transform: translateY(0);
     }
 }
 /* Logo image */
 
 .logo-img {
     margin-bottom: 20px;
 }
 
 .logo-img img {
     width: 150px;
     height: 150px;
     border-radius: 50%;
     object-fit: cover;
     border: 3px solid rgba(255, 255, 255, 0.2);
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
     transition: transform 0.3s ease;
 }
 
 .logo-img img:hover {
     transform: scale(1.05);
 }
 /* Title */
 
 h2 {
     font-size: 2.5rem;
     margin-bottom: 30px;
     font-weight: 600;
     color: #fff;
     text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
 }
 /* Enter button */
 
 .enter-btn {
     display: inline-flex;
     align-items: center;
     justify-content: center;
     padding: 14px 40px;
     background: linear-gradient(45deg, #4e54c8, #8f94fb);
     color: white;
     text-decoration: none;
     border-radius: 50px;
     font-weight: 500;
     transition: all 0.3s ease;
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
     font-size: 1.1rem;
     border: none;
     cursor: pointer;
     position: relative;
     overflow: hidden;
 }
 
 .enter-btn i {
     margin-left: 8px;
     transition: transform 0.3s ease;
 }
 
 .enter-btn:hover {
     background: linear-gradient(45deg, #4348a8, #7a7fd9);
     transform: translateY(-3px);
     box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
 }
 
 .enter-btn:hover i {
     transform: translateX(5px);
 }
 
 .enter-btn:active {
     transform: translateY(1px);
 }
 
 .enter-btn::after {
     content: '';
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: rgba(255, 255, 255, 0.1);
     transform: translateX(-100%);
     transition: transform 0.3s ease;
 }
 
 .enter-btn:hover::after {
     transform: translateX(100%);
 }
 /* Footer */
 
 .footer {
     position: absolute;
     bottom: 20px;
     left: 0;
     width: 100%;
     text-align: center;
     font-size: 0.9rem;
     color: rgba(255, 255, 255, 0.6);
     z-index: 3;
 }
 /* Responsive styles */
 
 @media only screen and (max-width: 768px) {
     .logo-card {
         padding: 30px;
         max-width: 400px;
     }
     .logo-img img {
         width: 120px;
         height: 120px;
     }
     h2 {
         font-size: 2rem;
         margin-bottom: 25px;
     }
     .enter-btn {
         padding: 12px 30px;
         font-size: 1rem;
     }
 }
 
 @media only screen and (max-width: 480px) {
     .logo-card {
         padding: 20px;
     }
     h2 {
         font-size: 1.8rem;
     }
     .enter-btn {
         padding: 10px 25px;
         font-size: 0.9rem;
     }
 }
 
 @media only screen and (min-width: 1200px) {
     .logo-card {
         max-width: 600px;
         padding: 50px;
     }
     .logo-img img {
         width: 180px;
         height: 180px;
     }
     h2 {
         font-size: 3rem;
     }
     .enter-btn {
         padding: 16px 45px;
         font-size: 1.2rem;
     }
 }