/**
 * 验证提示样式
 * 为表单验证提供美观的视觉反馈
 */

/* 验证消息容器 */
.validation-message {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    line-height: 1.4;
    animation: fadeIn 0.3s ease-in-out;
}

/* 成功消息样式 */
.validation-message.success {
    color: #27ae60;
    background: #d5f4e6;
    border: 1px solid #a8e6cf;
    border-radius: 4px;
    padding: 8px 12px;
    margin-top: 8px;
}

/* 错误消息样式 */
.validation-message.error {
    color: #e74c3c;
    background: #fdf2f2;
    border: 1px solid #f5c6cb;
    border-radius: 4px;
    padding: 8px 12px;
    margin-top: 8px;
}

/* 警告消息样式 */
.validation-message.warning {
    color: #f39c12;
    background: #fef9e7;
    border: 1px solid #fdeaa7;
    border-radius: 4px;
    padding: 8px 12px;
    margin-top: 8px;
}

/* 输入框验证状态 */
input.valid,
textarea.valid,
select.valid {
    border-color: #27ae60 !important;
    box-shadow: 0 0 0 2px rgba(39, 174, 96, 0.2) !important;
    transition: all 0.3s ease;
}

input.invalid,
textarea.invalid,
select.invalid {
    border-color: #e74c3c !important;
    box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2) !important;
    transition: all 0.3s ease;
}

/* 表单组样式 */
.form-group {
    position: relative;
    margin-bottom: 20px;
}

.form-group.has-error .form-control {
    border-color: #e74c3c;
    box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2);
}

.form-group.has-success .form-control {
    border-color: #27ae60;
    box-shadow: 0 0 0 2px rgba(39, 174, 96, 0.2);
}

/* 字符计数样式 */
.char-counter {
    position: absolute;
    bottom: -20px;
    right: 0;
    font-size: 11px;
    color: #95a5a6;
}

.char-counter.warning {
    color: #f39c12;
}

.char-counter.danger {
    color: #e74c3c;
}

/* 提交按钮状态 */
.submit-btn {
    position: relative;
    transition: all 0.3s ease;
}

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

.submit-btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 加载动画 */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* 表单验证图标 */
.form-group.has-error::after {
    content: '⚠';
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    color: #e74c3c;
    font-size: 16px;
}

.form-group.has-success::after {
    content: '✓';
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    color: #27ae60;
    font-size: 16px;
}

/* 评论表单特殊样式 */
#commentform .validation-message {
    margin-top: 8px;
    padding: 6px 10px;
    border-radius: 3px;
    font-size: 11px;
}

#commentform textarea.valid {
    border-color: #27ae60;
    background-color: #f8fff8;
}

#commentform textarea.invalid {
    border-color: #e74c3c;
    background-color: #fff8f8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .validation-message {
        font-size: 11px;
        padding: 6px 8px;
    }
    
    .char-counter {
        font-size: 10px;
        bottom: -18px;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .validation-message.success {
        background: #000;
        color: #0f0;
        border-color: #0f0;
    }
    
    .validation-message.error {
        background: #000;
        color: #f00;
        border-color: #f00;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .validation-message,
    input,
    textarea,
    select,
    .submit-btn {
        animation: none;
        transition: none;
    }
}