* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f8f9fa;
    color: #333;
}

header {
    background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
    padding: 20px;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

header p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.btn-main {
    padding: 15px 35px;
    background-color: #fff;
    color: #1a2a6c;
    text-decoration: none;
    font-weight: bold;
    border-radius: 50px;
    transition: 0.3s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-main:hover {
    transform: translateY(-5px);
    background-color: #1a2a6c;
    color: white;
}

.preview-section {
    padding: 80px 20px;
    text-align: center;
}