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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: url('https://www.transparenttextures.com/patterns/cubes.png'), linear-gradient(135deg, #F4F7F9 0%, #E2E8F0 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    background: white;
    color: #334155;
    padding: 40px 20px;
    text-align: center;
    width: 100%;
    margin-bottom: 60px;
    box-shadow: 0 4px 20px rgba(90, 114, 160, 0.08);
}

header h1 {
    font-size: 34px;
    font-weight: 400;
    letter-spacing: 0.5px;
    color: #1E293B;
    max-width: 800px;
    margin: 0 auto;
}

main {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 50px 40px;
    background: #FFFFFF;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(90, 114, 160, 0.1);
    max-width: 450px;
    width: 90%;
    animation: slideUp 0.8s ease;
    border-top: 5px solid #5A72A0;
}

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

a {
    display: inline-block;
    margin: 12px;
    padding: 16px 30px;
    background: linear-gradient(135deg, #5A72A0 0%, #83B4BD 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 17px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    width: 280px;
    text-align: center;
}

a:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(90, 114, 160, 0.25);
    background: linear-gradient(135deg, #4A6290 0%, #73A4AD 100%);
}

@media screen and (max-width: 480px) {
    main {
        padding: 30px 20px;
        width: 95%;
    }
    header h1 {
        font-size: 22px;
        margin-bottom: 20px;
    }
    a {
        font-size: 14px;
        padding: 12px;
        width: 100%;
    }
}