* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-size: clamp(10px, 3vw, 20px);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #66ead8 0%, #4ba293 50%, #93abfb 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    min-height: 100vh;
}

.main-container {
    background: white;
    padding: 2rem;
    border-radius: .75rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 70vw;
    animation: slideUp 0.5s ease;
}

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

h1 {
    text-align: center;
    margin-bottom: 15px;
    color: #333333;
    font-size: 2em;
    font-weight: 600;
}

.main-container p {
    color: #666666;
    margin-bottom: 30px;
    font-size: 1.1em;
    text-align: center;
    font-weight: 500;
}

.login-mode {
    display: flex;
    justify-content: center;
    margin: 30px 0;
    flex-wrap: wrap;
    gap: 25px;
    flex: 1;
}

.login-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px;
    border-radius: 12px;
    width: 220px;
    height: 160px;
    text-align: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    justify-content: center;
    align-items: center;
    display: flex;
    flex-direction: column;
    font-weight: 600;
    font-size: 1.1em;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
    border: none;
}

.login-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #764ba2 0%, #f093fb 100%);
}


@media (max-width: 720px) {
    .login-card {
        width: 100%;
        height: auto;
        padding: 20px;
    }
    .main-container {
        padding: 20px;
        max-width: 100vw;
    }
}