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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    max-width: 1200px;
    width: 100%;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

.title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    font-weight: 300;
    letter-spacing: 1px;
    text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.2);
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    transition: height 0.3s ease;
}

.card-1::before {
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.card-2::before {
    background: linear-gradient(90deg, #f093fb, #f5576c);
}

.card-3::before {
    background: linear-gradient(90deg, #4facfe, #00f2fe);
}

.card-4::before {
    background: linear-gradient(90deg, #43e97b, #38f9d7);
}

.card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card:hover::before {
    height: 100%;
    opacity: 0.1;
}

.card-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.card-1 .card-icon {
    animation-delay: 0s;
}

.card-2 .card-icon {
    animation-delay: 0.5s;
}

.card-3 .card-icon {
    animation-delay: 1s;
}

.card-4 .card-icon {
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
}

.card-description {
    font-size: 1rem;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 1.5rem;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.card-2 .card-link {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
}

.card-3 .card-link {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.card-4 .card-link {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    box-shadow: 0 4px 15px rgba(67, 233, 123, 0.4);
}

.card-link:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.arrow {
    display: inline-block;
    transition: transform 0.3s ease;
}

.card-link:hover .arrow {
    transform: translateX(5px);
}

.footer {
    text-align: center;
    color: white;
    font-size: 0.9rem;
    opacity: 0.8;
    text-shadow: 1px 2px 4px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .cards-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .card {
        padding: 2rem;
    }

    .card-icon {
        font-size: 3rem;
    }

    .card-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 1rem;
    }

    .title {
        font-size: 2rem;
    }

    .card {
        padding: 1.5rem;
    }
}