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

body {
    background: #f5f6f8;
    font-family: Arial, sans-serif;
}

/* Container căn giữa toàn màn hình */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center; /* QUAN TRỌNG: căn giữa dọc */
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 25px;
}

.logo {
    width: 110px;
    margin-bottom: 10px;
}

.header h2 {
    font-size: 20px;
    font-weight: 600;
    color: #1a3c6e;
}

/* Box đăng nhập */
.login-box {
    width: 420px;
    background: white;
    padding: 30px 30px 20px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
}

/* Title */
.login-box h3 {
    font-size: 24px;
    color: #2f5fa7;
    margin-bottom: 5px;
}

.login-box p {
    font-size: 13px;
    color: #6b7280;
    margin-bottom: 20px;
}

/* Input */
.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 5px;
    color: #374151;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #cbd5e1;
    background: #f1f5f9;
    font-size: 14px;
}

/* Button login */
.btn-login {
    width: 100%;
    padding: 12px;
    background: #0f5c8c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 15px;
    font-weight: 500;
}

.btn-login:hover {
    background: #0c4a6e;
}

/* Google button */
.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 12px;
    padding: 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    text-decoration: none;
    color: #1f2937;
    font-size: 14px;
    background: white;
}

.btn-google img {
    width: 18px;
}

.btn-google:hover {
    background: #f9fafb;
}

/* Gạch ngang */
.line {
    margin: 20px 0 10px;
    border-top: 1px solid #e5e7eb;
}

/* Forgot */
.forgot {
    text-align: left; /* QUAN TRỌNG: nằm bên trái */
}

.forgot a {
    text-decoration: none;
    font-size: 13px;
    color: #2563eb;
}
.error-text {
    color: red;
    font-size: 13px;
    margin-top: 8px;
    text-align: center;
}