.tool-wrapper {
/*    padding: 20px 0; */
    --n-shadow-l: #ffffff;
    --n-shadow-d: #d1d9e6;
    --n-p: #007bff;
    --n-t: #313d5a;
    margin:20px;
}

.tool-title {
    font-size: 24px;
    color: var(--n-t);
    margin-bottom: 30px;
    text-align: center;
}

.tool-container {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

/* 拟态卡片共通 */
.tool-settings, .tool-result {
    flex: 1;
    min-width: 300px;
    padding: 25px;
    border-radius: 20px;
    box-shadow: 8px 8px 16px var(--n-shadow-d), -8px -8px 16px var(--n-shadow-l);
    box-sizing: border-box; /* 必须加这一行 */
    display: flex;
    flex-direction: column;
}

/* 结果头部的按钮对齐 */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    margin-bottom: 5px;
}

.setting-item {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item input[type="number"], #result-area {
    border: none;
    outline: none;
    padding: 12px;
    border-radius: 10px;
    background: transparent;
    box-shadow: inset 3px 3px 6px var(--n-shadow-d), inset -3px -3px 6px var(--n-shadow-l);
    color: var(--n-t);
}

.setting-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 25px 0;
}

.checkbox-container {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
}

/* 拟态按钮 */
.tool-btn {
    border: none;
    padding: 12px 25px;
    border-radius: 12px;
    cursor: pointer;
    background: transparent;
    color: var(--n-t);
    font-weight: bold;
    box-shadow: 4px 4px 8px var(--n-shadow-d), -4px -4px 8px var(--n-shadow-l);
    transition: all 0.2s;
}

.tool-btn:active {
    box-shadow: inset 3px 3px 6px var(--n-shadow-d), inset -3px -3px 6px var(--n-shadow-l);
    transform: scale(0.98);
}

.tool-btn.primary { width: 100%; color: var(--n-p); }
.tool-btn.small { padding: 6px 12px; font-size: 12px; }

#result-area {
    width: 100%;             /* 确保填满父容器 */
    height: 300px;
    resize: none;
    margin-top: 15px;
    padding: 15px;           /* 增加内边距，让文字不贴边 */
    border: none;
    outline: none;
    border-radius: 12px;
    background: transparent;
    font-family: monospace;
    font-size: 14px;
    line-height: 1.6;
    color: var(--n-t);
    
    /* 关键属性：确保宽度包含 padding 和 border，防止溢出 */
    box-sizing: border-box; 
    
    /* 拟态内凹阴影 */
    box-shadow: inset 4px 4px 8px var(--n-shadow-d), 
                inset -4px -4px 8px var(--n-shadow-l);
}
/* --- 底部概述区样式 --- */
.tool-intro-section {
    margin-top: 40px;
    padding: 30px;
    border-radius: 20px;
    /* 使用内凹阴影，区别于工具区的凸起感 */
    box-shadow: inset 6px 6px 12px var(--n-shadow-d), inset -6px -6px 12px var(--n-shadow-l);
    color: var(--n-t);
}

.intro-title {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--n-p); /* 使用主题蓝色作为标题色 */
    font-weight: bold;
}

.intro-content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--n-t);
    opacity: 0.9;
}

.intro-content p {
    margin-bottom: 12px;
}

.intro-content ul {
    padding-left: 20px;
    list-style-type: none;
}

.intro-content li {
    position: relative;
    margin-bottom: 8px;
}

/* 列表前的小装饰 */
.intro-content li::before {
    content: "•";
    color: var(--n-p);
    font-weight: bold;
    display: inline-block; 
    width: 1em;
    margin-left: -1em;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .tool-intro-section {
        padding: 20px;
        margin-top: 30px;
    }
}
@media (max-width: 768px) {
    .tool-container { flex-direction: column; }
}