/* Next.js 官网风格：浅色主题、黑色按钮、小圆角 */
:root {
    --bg: #fff;
    --panel: #fff;
    --panel-2: #fafafa;
    --border: #eaeaea;
    --border-2: #d4d4d4;
    --text: #111;
    --text-2: #666;
    --text-3: #999;
    --accent: #0070f3;
    --radius: 8px;
    --radius-sm: 6px;
    color-scheme: light;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Microsoft YaHei", "PingFang SC", sans-serif;
    background: var(--bg);
    color: var(--text);
}

.page {
    display: flex;
    justify-content: center;
    padding: 48px 16px 32px;
    flex: 1;
    width: 100%;
}

.card {
    background: var(--panel);
    width: 100%;
    max-width: 820px;
    height: fit-content;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.card-head {
    padding: 28px 32px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.head-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-title {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--text);
}
.site-title a { color: inherit; text-decoration: none; }

/* 工具栏：左侧分类导航，右侧小搜索框 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.cats {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.cat-link {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-2);
    text-decoration: none;
    transition: border-color .15s, color .15s, background .15s;
}
.cat-link:hover { border-color: var(--text); color: var(--text); }
.cat-link.active { background: #000; border-color: #000; color: #fff; }

.search {
    flex: 0 0 auto;
    display: flex;
}
.search input {
    width: 170px;
    padding: 7px 12px;
    border: 1px solid var(--border-2);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
.search input::placeholder { color: var(--text-3); }
.search input:focus {
    border-color: var(--text);
    box-shadow: 0 0 0 3px rgba(0, 112, 243, .15);
}
.search-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    border: 1px solid #000;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: #000;
    color: #fff;
    cursor: pointer;
    transition: background .15s;
}
.search-btn:hover { background: #1f1f1f; }

.list { padding: 8px 12px 12px; }

.item {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    transition: background .15s;
}
.item:hover { background: var(--panel-2); }
.item + .item { border-top: 1px solid var(--border); }

.item-title {
    display: block;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -.01em;
    color: var(--text);
    text-decoration: none;
    margin-bottom: 8px;
}
.item:hover .item-title { color: var(--accent); }

.item-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-3);
}

.badge {
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    color: var(--text-2);
    font-weight: 500;
}

.empty {
    padding: 56px 20px;
    text-align: center;
    color: var(--text-3);
    font-size: 14px;
}

.card-foot {
    padding: 14px 32px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-3);
}
.card-foot a { color: var(--text-2); text-decoration: none; }
.card-foot a:hover { color: var(--text); }

/* 网页底部 footer（卡片外） */
.site-footer {
    width: 100%;
    max-width: 852px; /* 820 + 16*2 padding */
    margin: 0 auto;
    padding: 0 16px 36px;
}
.footer-divider {
    border-top: 1px solid var(--border);
    margin-bottom: 14px;
}
.site-footer p {
    margin: 0;
    text-align: center;
    font-size: 12px;
    color: var(--text-3);
}
.site-footer a { color: var(--text-2); text-decoration: none; }
.site-footer a:hover { color: var(--text); }

/* 分页条 */
.pager {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 4px 16px 24px;
}
.page-btn {
    min-width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-2);
    text-decoration: none;
}
a.page-btn:hover { border-color: var(--text); color: var(--text); }
.page-btn.current {
    background: #000;
    border-color: #000;
    color: #fff;
    font-weight: 500;
}
.page-btn.disabled, .page-btn.ellipsis {
    border-color: transparent;
    color: var(--border-2);
}

/* 文章详情 */
.post-head { gap: 12px; }
.back {
    font-size: 13px;
    color: var(--text-3);
    text-decoration: none;
}
.back:hover { color: var(--text); }
.post-title {
    margin: 0;
    font-size: 26px;
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--text);
}

.post-content {
    padding: 28px 36px 40px;
    line-height: 1.85;
    font-size: 15.5px;
    color: #333;
    word-break: break-word;
}
.post-content h1, .post-content h2, .post-content h3 {
    color: var(--text);
    line-height: 1.5;
    margin: 1.4em 0 .7em;
    letter-spacing: -.02em;
}
.post-content h1 { font-size: 24px; border-bottom: 1px solid var(--border); padding-bottom: .35em; }
.post-content h2 { font-size: 20px; }
.post-content h3 { font-size: 17px; }
.post-content a { color: var(--accent); }
.post-content img { max-width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.post-content blockquote {
    margin: 1em 0;
    padding: 10px 18px;
    border-left: 3px solid var(--border-2);
    background: var(--panel-2);
    color: var(--text-2);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
/* 代码块：highlight.js atom-one-dark */
.post-content pre {
    background: #282c34;
    color: #abb2bf;
    border: 1px solid #21252b;
    padding: 0;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 13.5px;
    line-height: 1.7;
    margin: 1.2em 0;
}
.post-content code {
    font-family: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace;
    background: var(--panel-2);
    border: 1px solid var(--border);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .9em;
}
.post-content pre code,
.post-content pre code.hljs {
    display: block;
    background: transparent;
    border: none;
    padding: 16px 18px;
    overflow-x: auto;
    color: inherit;
    font-size: inherit;
    line-height: inherit;
}
.post-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}
.post-content th, .post-content td {
    border: 1px solid var(--border);
    padding: 8px 12px;
    text-align: left;
}
.post-content th { background: var(--panel-2); }

.notfound { text-align: center; padding: 80px 20px; }
.notfound .code { font-size: 64px; font-weight: 700; letter-spacing: -.04em; color: var(--text); }
.notfound p { color: var(--text-2); margin: 12px 0 28px; }
.btn {
    display: inline-block;
    padding: 10px 26px;
    border: 1px solid #000;
    border-radius: var(--radius-sm);
    background: #000;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}
.btn:hover { background: #1f1f1f; border-color: #1f1f1f; }

@media (max-width: 640px) {
    .page { padding: 16px 10px; }
    .card-head, .card-foot { padding-left: 20px; padding-right: 20px; }
    .post-content { padding: 20px 20px 32px; }
}