/**
 * 用户留言系统前端样式
 */

/* 表单容器 */
.ums-form-container {
    max-width: 600px;
    margin: 20px auto;
    padding: 30px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* 表单标题 */
.ums-form-title {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: 600;
    position: relative;
}

.ums-form-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

/* 表单样式 */
.ums-form {
    width: 100%;
}

.ums-form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.ums-form-group {
    flex: 1;
    margin-bottom: 20px;
}

.ums-label {
    display: block;
    margin-bottom: 8px;
    color: #34495e;
    font-weight: 500;
    font-size: 14px;
}

.ums-required {
    color: #e74c3c;
    margin-left: 2px;
}

.ums-optional {
    color: #7f8c8d;
    font-weight: normal;
    font-size: 12px;
}

/* 输入框样式 */
.ums-input,
.ums-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    background-color: #ffffff;
    box-sizing: border-box;
}

.ums-input:focus,
.ums-textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.ums-textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

/* 验证码样式 */
.ums-captcha-group {
    flex: 1;
}

.ums-captcha-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ums-captcha-question {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #f8f9fa;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-weight: 500;
    color: #2c3e50;
    min-width: 120px;
    justify-content: center;
}

.ums-refresh-btn {
    background: none;
    border: none;
    color: #667eea;
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.ums-refresh-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: rotate(180deg);
}

.ums-captcha-input {
    max-width: 100px;
}

/* 提交按钮 */
.ums-submit-group {
    text-align: center;
    margin-top: 30px;
}

.ums-submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 14px 40px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    min-width: 140px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.ums-submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.ums-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.ums-loading-spinner {
    display: inline-block;
}

.ums-loading-spinner svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 错误消息 */
.ums-error-message {
    color: #e74c3c;
    font-size: 12px;
    margin-top: 5px;
    display: none;
}

/* 表单通知 */
.ums-form-notice {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.ums-form-notice p {
    margin: 5px 0;
    font-size: 12px;
    color: #6c757d;
}

/* 消息提示 */
.ums-form-messages {
    margin-top: 20px;
}

.ums-success {
    background: #d4edda;
    color: #155724;
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 4px solid #28a745;
}

.ums-error {
    background: #f8d7da;
    color: #721c24;
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 4px solid #dc3545;
}

/* 成功页面 */
.ums-success-message {
    text-align: center;
    padding: 40px 20px;
}

.ums-success-icon {
    font-size: 48px;
    color: #28a745;
    margin-bottom: 20px;
    display: inline-block;
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
    background: rgba(40, 167, 69, 0.1);
}

.ums-success-message p {
    font-size: 18px;
    color: #2c3e50;
    margin: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .ums-form-container {
        margin: 10px;
        padding: 20px;
    }
    
    .ums-form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .ums-form-title {
        font-size: 20px;
    }
    
    .ums-captcha-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .ums-captcha-question {
        min-width: auto;
        margin-bottom: 10px;
    }
    
    .ums-captcha-input {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .ums-form-container {
        margin: 5px;
        padding: 15px;
    }
    
    .ums-input,
    .ums-textarea {
        padding: 10px 12px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .ums-submit-btn {
        width: 100%;
        padding: 16px;
    }
}

/* 动画效果 */
.ums-form-container {
    animation: fadeInUp 0.6s ease-out;
}

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

/* 输入框聚焦动画 */
.ums-input,
.ums-textarea {
    position: relative;
}

.ums-input:focus,
.ums-textarea:focus {
    animation: inputFocus 0.3s ease-out;
}

@keyframes inputFocus {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .ums-form-container {
        background: #2c3e50;
        color: #ecf0f1;
    }
    
    .ums-form-title {
        color: #ecf0f1;
    }
    
    .ums-label {
        color: #bdc3c7;
    }
    
    .ums-input,
    .ums-textarea {
        background: #34495e;
        border-color: #4a5f7a;
        color: #ecf0f1;
    }
    
    .ums-input:focus,
    .ums-textarea:focus {
        border-color: #667eea;
    }
    
    .ums-captcha-question {
        background: #34495e;
        border-color: #4a5f7a;
        color: #ecf0f1;
    }
    
    .ums-form-notice {
        background: #34495e;
        color: #bdc3c7;
    }
}

/* 验证码样式 */
.ums-captcha-group {
    flex: 0 0 auto;
}

.ums-captcha-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ums-captcha-image-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ums-captcha-image-container img {
    border: 2px solid #ddd;
    border-radius: 6px;
    background: #f9f9f9;
    padding: 2px;
    max-width: 120px;
    height: auto;
}

.ums-captcha-input {
    width: 120px !important;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.ums-refresh-btn {
    background: #007cba;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.ums-refresh-btn:hover {
    background: #005a87;
}

.ums-refresh-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* 选填字段样式 */
.ums-optional {
    color: #666;
    font-size: 12px;
    font-weight: normal;
}

.ums-required {
    color: #e74c3c;
    font-weight: bold;
}