/* 认证页面样式 */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.auth-card {
    width: 100%;
    max-width: 450px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.auth-header {
    background: linear-gradient(135deg, #3498db 0%, #2c3e50 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.auth-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.auth-header p {
    margin: 0.5rem 0 0;
    opacity: 0.9;
}

.auth-header i {
    margin-right: 10px;
}

.auth-body {
    padding: 2rem;
}

.auth-footer {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.auth-footer a {
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
}

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

/* 表单样式 */
.form-label {
    font-weight: 500;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-label i {
    margin-right: 8px;
    color: #3498db;
}

.form-control {
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-text {
    font-size: 0.875rem;
    color: #7f8c8d;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    border: none;
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

/* 警告框样式 */
.alert {
    border-radius: 8px;
    border: none;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.alert-danger {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

.alert-success {
    background: linear-gradient(135deg, #27ae60 0%, #219653 100%);
    color: white;
}

/* 响应式调整 */
@media (max-width: 576px) {
    .auth-card {
        max-width: 100%;
    }
    
    .auth-header, .auth-body {
        padding: 1.5rem;
    }
    
    .auth-header h1 {
        font-size: 1.5rem;
    }
}

/* 密码强度指示器 */
.password-strength {
    margin-top: 0.25rem;
    font-size: 0.875rem;
}

.strength-bar {
    height: 5px;
    border-radius: 3px;
    margin-top: 5px;
    background: #eee;
    overflow: hidden;
}

.strength-bar-fill {
    height: 100%;
    width: 0%;
    transition: width 0.3s, background 0.3s;
}

.strength-weak .strength-bar-fill {
    width: 33%;
    background: #e74c3c;
}

.strength-medium .strength-bar-fill {
    width: 66%;
    background: #f39c12;
}

.strength-strong .strength-bar-fill {
    width: 100%;
    background: #27ae60;
}

/* 输入验证样式 */
.form-control.is-invalid {
    border-color: #e74c3c;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23e74c3c'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23e74c3c' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-valid {
    border-color: #27ae60;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2327ae60' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}