@import url('https://fonts.googleapis.com/css2?family=Faustina:ital,wght@0,300..800;1,300..800&family=Karma:wght@300;400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Karma', sans-serif;
}

section {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
    background: #ffffff;
    background-size: cover;
    background-position: center;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #e0f7fa; /* xanh biển nhạt */
}

.login-box {
    display: flex;
    position: relative;
    width: 400px;
    height: 450px;
    background: #0098a1; /* xanh biển đậm */
    border-radius: .5rem;
    justify-content: center;
    align-items: center;
    border: 2px solid #ffffff;
    backdrop-filter: blur(5px);
}

h2 {
    color: #ffffff;
    font-size: 3rem;
    margin-bottom: 20px;
    text-align: center;
}

.input-box {
    width: 310px;
    margin: 30px 0;
    position: relative;
    border-bottom: 2px solid #ffffff;
}

.input-box label {
    position: absolute;
    top: 50%;
    left: 5px;
    transform: translateY(-50%);
    font-size: 1em;
    color: #ffffff;
    pointer-events: none;
    transition: .5s;
}

.input-box input:focus ~ label,
.input-box input:valid ~ label {
    top: -5px;
}

.input-box input {
    width: 100%;
    height: 50px;
    background: transparent;
    border: none;
    outline: none;
    font-size: 1.3rem;
    color: #ffffff;
    padding: 0 35px 0 5px;
}

.input-box .icon {
    position: absolute;
    right: 8px;
    color: #ffffff;
    font-size: 1.5rem;
    line-height: 57px;
}

.remember-forgot {
    margin: -15px 0 15px;
    font-size: .9em;
    color: #ffffff;
    display: flex;
    justify-content: space-between;
}

.remember-forgot label input {
    margin-right: 1rem;
}

.remember-forgot a {
    color: #ffffff;
    text-decoration: none;
}

.remember-forgot a:hover {
    text-decoration: underline;
}

button {
    width: 100%;
    height: 50px;
    background: #ffffff;
    border: none;
    border-radius: .5rem;
    font-size: 1.2rem;
    cursor: pointer;
    color: #0098a1;
    outline: none;
    font-weight: 600;
    transition: background 0.3s ease;
}

button:hover {
    background: #cceff1;
}

.register-link {
    margin-top: 20px;
    font-size: .9em;
    color: #ffffff;
    text-align: center;
}

.register-link p a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
}

.register-link p a:hover {
    text-decoration: underline;
}

@media (max-width: 500px) {
    .login-box {
        width: 90%;
        height: auto;
    }
    h2 {
        font-size: 2.5rem;
    }
    .input-box {
        width: 100%;
    }
    button {
        font-size: 1rem;
    }
}