.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), 
                url('https://via.placeholder.com/1920x1080/fff/ddd?text=Gio+Qua+Tet') center/cover no-repeat;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 45px 40px;
    border-radius: 16px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-box h2 {
    font-size: 28px;
    color: #333;
    margin-bottom: 8px;
}

.login-subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 15px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #444;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus {
    border-color: #f5b800;
    box-shadow: 0 0 0 3px rgba(245, 184, 0, 0.15);
    outline: none;
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    font-size: 14px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.forgot-password {
    color: #f5b800;
    text-decoration: none;
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: #f5b800;
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
}

.btn-login:hover {
    background: #ffcc00;
    transform: translateY(-2px);
}

.login-footer {
    margin-top: 25px;
    font-size: 14.5px;
}

.login-footer a {
    color: #f5b800;
    font-weight: 500;
}

.social-login {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.social-login p {
    color: #888;
    margin-bottom: 12px;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.social-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    font-size: 18px;
    cursor: pointer;
    transition: 0.3s;
}

.social-btn.facebook { background: #1877f2; color: white; }
.social-btn.google { background: #db4437; color: white; }
.social-btn.zalo { background: #0068ff; color: white; }

.social-btn:hover {
    transform: scale(1.08);
}