/* 主题变量定义 */
:root {
    --bg-color: #f8f9fa;
    --text-color: #343a40;
    --card-bg: #ffffff;
    --card-border: #e9ecef;
    --card-hover-bg: #f1f3f5;
    --link-color: #007bff;
    --link-hover: #0056b3;
    --control-bg: #ffffff;
    --control-border: #ced4da;
}
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --card-border: #333333;
    --card-hover-bg: #2a2a2a;
    --link-color: #66aaff;
    --link-hover: #99c7ff;
    --control-bg: #2a2a2a;
    --control-border: #444444;
}

/* style.css */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 20px auto;
    max-width: 800px;
    padding: 0 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #dee2e6;
}

header h1 {
    color: #212529;
    margin-bottom: 5px;
}

header p {
    color: #6c757d;
    font-size: 1.1em;
}

main h2 {
    color: #495057;
    margin-bottom: 20px;
    text-align: center;
}

.tool-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tool-list li {
    background-color: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 20px;
    padding: 20px 25px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.tool-list li:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
}

.tool-list a {
    font-size: 1.2em;
    font-weight: 600;
    color: #007bff;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
}

.tool-list a:hover {
    text-decoration: underline;
    color: #0056b3;
}

.tool-list p {
    margin: 0;
    font-size: 1em;
    color: #6c757d;
}

footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 25px;
    border-top: 1px solid #dee2e6;
    font-size: 0.9em;
    color: #adb5bd;
}

/* 控件样式 */
.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

#search-input {
    padding: 8px 12px;
    border: 1px solid var(--control-border);
    border-radius: 4px;
    width: 200px;
    background-color: var(--control-bg);
    color: var(--text-color);
}

#search-input::placeholder {
    color: var(--text-color);
    opacity: 0.7;
}

#theme-toggle {
    background: none;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
    color: var(--text-color);
}

/* 新增网格布局和卡片样式 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.tool-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-4px);
    background-color: var(--card-hover-bg);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.tool-card a {
    font-size: 1.25em;
    color: var(--link-color);
    text-decoration: none;
}

.tool-card a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.tool-card p {
    margin-top: 8px;
    color: #6c757d;
    line-height: 1.4;
}