/* nền */
body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #eef2f7, #f9fbfd);
}

/* wrapper center */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* card */
.auth-container {
    width: 380px;
    background: #fff;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}
.register-container {
    width: 680px;
    background: #fff;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

/* title */
.auth-title {
    text-align: center;
    margin-bottom: 25px;
    font-size: 22px;
    font-weight: 600;
    color: #fc4a09;
}

/* form */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #444;
}

/* input */
.form-group input {
    width: 100%;
    padding: 11px 12px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 14px;
    transition: 0.2s;
}

/* focus effect */
.form-group input:focus {
    border-color: #4f7cff;
    box-shadow: 0 0 0 3px rgba(79,124,255,0.15);
    outline: none;
}

/* button */
.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #ff6c37, #fc4a09);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

/* alert */
.alert {
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 14px;
}

.alert.success {
    background: #e6f9f0;
    color: #1a7f4f;
}

.alert.error {
    background: #ffecec;
    color: #d93025;
}

/* links */
.auth-links {
    margin-top: 18px;
    text-align: center;
}

.auth-links a {
    display: block;
    font-size: 13px;
    color: #4f7cff;
    text-decoration: none;
    margin-top: 6px;
}

.auth-links a:hover {
    text-decoration: underline;
}