/* Google Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap');

/* Tổng thể */
body {
    font-family: 'Poppins', sans-serif;
    background: radial-gradient(circle, #1a1a2e, #16213e);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

/* Container chung */
.container {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 35px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    text-align: center;
    width: 360px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: fadeIn 1s ease-in-out;
}

/* Tiêu đề */
.container h2 {
    color: white;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
}

/* Ô nhập liệu */
.form-group {
    margin-bottom: 15px;
    text-align: left;
}

.form-group label {
    color: white;
    font-weight: 400;
    display: block;
    margin-bottom: 5px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    outline: none;
    transition: 0.3s;
}

/* Hiệu ứng khi nhập */
.form-group input:focus {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

/* Nút bấm */
button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background: linear-gradient(135deg, #ff416c, #ff4b2b);
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease-in-out;
    box-shadow: 0 4px 10px rgba(255, 65, 108, 0.4);
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 65, 108, 0.6);
}

/* Link chuyển trang */
.link-text {
    margin-top: 15px;
    color: white;
    font-size: 14px;
}

.link-text a {
    color: #ff4b2b;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.link-text a:hover {
    color: #ff416c;
}

/* Hiệu ứng fade-in */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}