/* file: css/auth.css */
.auth-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.auth-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 215, 0, 0.2);
    border-radius: 30px;
    padding: 50px 40px;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-header {
    text-align: center;
    margin-bottom: 40px;
}

.auth-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 10px;
}

.auth-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group label i {
    color: #ffd700;
    width: 18px;
}

.form-group input {
    background: rgba(255, 255, 255, 0.07);
    border: 2px solid rgba(255, 215, 0, 0.2);
    border-radius: 12px;
    padding: 14px 16px;
    color: #fff;
    font-size: 15px;
    transition: all 0.3s;
    outline: none;
}

.form-group input:hover {
    border-color: rgba(255, 215, 0, 0.5);
}

.form-group input:focus {
    border-color: #ffd700;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

.form-group .form-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 4px;
}

.password-input {
    position: relative;
}

.password-input input {
    width: 100%;
    padding-right: 50px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    padding: 5px;
    font-size: 18px;
    transition: all 0.3s;
}

.toggle-password:hover {
    color: #ffd700;
}

.terms {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin: 10px 0;
}

.terms input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #ffd700;
    cursor: pointer;
}

.terms label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.terms a {
    color: #ffd700;
    text-decoration: none;
    font-weight: 600;
}

.terms a:hover {
    text-decoration: underline;
}

.btn-submit {
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    color: #0f0c1f;
    border: none;
    border-radius: 50px;
    padding: 16px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 20px;
    position: relative;
    overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.4);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-submit .btn-loading {
    color: #0f0c1f;
}

.auth-footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 215, 0, 0.2);
}

.auth-footer p {
    color: rgba(255, 255, 255, 0.7);
}

.auth-footer a {
    color: #ffd700;
    text-decoration: none;
    font-weight: 600;
}

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

.auth-social {
    text-align: center;
    margin-top: 30px;
}

.auth-social p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    margin-bottom: 15px;
    position: relative;
}

.auth-social p::before,
.auth-social p::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 30%;
    height: 1px;
    background: rgba(255, 215, 0, 0.2);
}

.auth-social p::before {
    left: 0;
}

.auth-social p::after {
    right: 0;
}

.social-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.social-btn {
    flex: 1;
    padding: 12px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.social-btn.google {
    background: #fff;
    color: #333;
}

.social-btn.google:hover {
    background: #f5f5f5;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.2);
}

.social-btn.facebook {
    background: #1877f2;
    color: #fff;
}

.social-btn.facebook:hover {
    background: #166fe5;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(24, 119, 242, 0.4);
}

/* Thông báo lỗi / thành công */
.alert {
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background: rgba(0, 255, 0, 0.1);
    border: 1px solid #00ff00;
    color: #00ff00;
}

.alert-error {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid #ff0000;
    color: #ff0000;
}

.alert i {
    font-size: 20px;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-card {
        padding: 30px 20px;
    }
    
    .auth-header h2 {
        font-size: 24px;
    }
    
    .social-buttons {
        flex-direction: column;
    }
    
    .terms {
        align-items: flex-start;
    }
    
    .terms input[type="checkbox"] {
        margin-top: 3px;
    }
}