/* ==========================================================
   简记拾遗 · 全站主题（亮/暗双主题）
   - 跟随系统自动切换 + 手动切换按钮（记忆选择）
   - 页面需在 <head> 早期设置 <html data-theme="light|dark">
   ========================================================== */

:root {
    color-scheme: light;
    --c-bg: #f5f5f5;
    --c-text-1: #222;
    --c-text-2: #444;
    --c-text-3: #666;
    --c-surface: rgba(255, 255, 255, 0.95);
    --c-surface-strong: rgba(255, 255, 255, 0.98);
    --c-surface-border: rgba(255, 255, 255, 0.5);
    --c-mask: rgba(255, 255, 255, 0.95);
    --c-line: rgba(0, 0, 0, 0.1);
    --c-shadow: rgba(0, 0, 0, 0.15);
    --c-accent: #667eea;
    --c-accent-2: #764ba2;
    --c-heading: #222;
    --c-link-alt: #0085a1;
    --c-link-bright: #8ab4f8;
}

[data-theme="dark"] {
    color-scheme: dark;
    --c-bg: #14161a;
    --c-text-1: #e8eaed;
    --c-text-2: #c9ccd1;
    --c-text-3: #9aa0a6;
    --c-surface: rgba(32, 35, 42, 0.95);
    --c-surface-strong: rgba(36, 39, 46, 0.98);
    --c-surface-border: rgba(255, 255, 255, 0.08);
    --c-mask: rgba(16, 18, 22, 0.90);
    --c-line: rgba(255, 255, 255, 0.12);
    --c-shadow: rgba(0, 0, 0, 0.55);
    --c-heading: #f1f3f4;
    --c-link-alt: #7ab8c9;
}

/* ---------- 现有组件的暗色覆盖 ---------- */
[data-theme="dark"] body {
    background-color: var(--c-bg);
    color: var(--c-text-2);
}

[data-theme="dark"] body::before {
    background: var(--c-mask);
}

[data-theme="dark"] .content-container,
[data-theme="dark"] .post-container,
[data-theme="dark"] .post-card,
[data-theme="dark"] .donate-modal-content {
    background: var(--c-surface);
    border-color: var(--c-surface-border);
    box-shadow: 0 8px 32px var(--c-shadow);
    color: var(--c-text-2);
}

/* 首页文章卡片 + 排序切换（暗色） */
[data-theme="dark"] .post-card .post-title { color: var(--c-text-1); }
[data-theme="dark"] .post-card:hover .post-title { color: var(--c-link-bright); }
[data-theme="dark"] .post-card .post-meta { color: var(--c-text-3); }
[data-theme="dark"] .sort-switch { background: rgba(138, 180, 248, 0.12); }
[data-theme="dark"] .sort-btn { color: var(--c-text-3); }
[data-theme="dark"] .post-search input {
    background: rgba(24, 27, 33, 0.85);
    border-color: var(--c-line);
    color: var(--c-text-1);
}
[data-theme="dark"] .post-search input:focus {
    border-color: var(--c-link-bright);
    box-shadow: 0 0 0 3px rgba(138, 180, 248, 0.15);
}
[data-theme="dark"] .post-search input::placeholder { color: var(--c-text-3); }
[data-theme="dark"] .post-empty { color: var(--c-text-3); }

[data-theme="dark"] .navbar-custom.scrolled { background: rgba(26, 29, 35, 0.95); }
[data-theme="dark"] .nav-capsule { background: rgba(32, 35, 42, 0.95); box-shadow: 0 4px 15px rgba(0, 0, 0, 0.45); }
[data-theme="dark"] .nav-capsule .nav-link { color: var(--c-text-1) !important; }
[data-theme="dark"] .navbar-brand { color: var(--c-text-1) !important; }
[data-theme="dark"] .navbar-description { color: var(--c-text-3); }

[data-theme="dark"] footer { border-top-color: var(--c-line); }
[data-theme="dark"] footer p,
[data-theme="dark"] .footer-left p { color: var(--c-text-3) !important; }
[data-theme="dark"] .beian-links a { color: var(--c-link-alt) !important; }

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4 { color: var(--c-heading); }
[data-theme="dark"] .section-title { color: var(--c-link-bright); border-bottom-color: var(--c-link-bright); }
[data-theme="dark"] .content-container p,
[data-theme="dark"] .section p { color: var(--c-text-2); }
[data-theme="dark"] .donate-qr-code p { color: var(--c-text-1); }

/* 文章正文（markdown-viewer 渲染的 Markdown 内容） */
[data-theme="dark"] .post-container a { color: var(--c-link-bright); }
[data-theme="dark"] .post-container table { color: var(--c-text-2); border-color: var(--c-line); }
[data-theme="dark"] .post-container table th,
[data-theme="dark"] .post-container table td { border-color: var(--c-line); background: transparent; }
[data-theme="dark"] .post-container table thead { background: rgba(255, 255, 255, 0.05); }
[data-theme="dark"] .post-container pre {
    background: #1b1e24;
    border: 1px solid var(--c-line);
    color: #d7dade;
}
[data-theme="dark"] .post-container code { background: #2a2e36; color: #e8eaed; }
[data-theme="dark"] .post-container pre code { background: transparent; color: inherit; }
[data-theme="dark"] .post-container blockquote { color: var(--c-text-3); border-left-color: var(--c-accent); }
[data-theme="dark"] .post-container hr { border-top-color: var(--c-line); }

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
    position: fixed;
    left: 18px;
    bottom: 18px;
    z-index: 1200;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 20px;
    line-height: 46px;
    text-align: center;
    padding: 0;
    background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.45);
    transition: transform 0.25s, box-shadow 0.25s;
    -webkit-transition: transform 0.25s, box-shadow 0.25s;
}
.theme-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.55);
}

/* ---------- 首页分区 ---------- */
.index-section { margin-top: 45px; }
.section-heading {
    font-size: 21px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--c-heading);
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(102, 126, 234, 0.35);
}
[data-theme="dark"] .section-heading { border-bottom-color: rgba(138, 180, 248, 0.4); }

/* ---------- 下载专区 ---------- */
.download-list { display: flex; flex-direction: column; }
.download-row {
    display: flex;
    align-items: center;
    padding: 14px 4px;
    border-bottom: 1px solid var(--c-line);
}
.download-row:last-child { border-bottom: none; }
.download-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin-right: 14px;
    flex-shrink: 0;
    border-radius: 6px;
}
.download-info { flex: 1; min-width: 0; }
.download-name {
    font-size: 15.5px;
    font-weight: 600;
    color: var(--c-text-1);
    text-decoration: none;
}
.download-name:hover { color: var(--c-accent); text-decoration: none; }
.download-desc { font-size: 13px; color: var(--c-text-3); margin-top: 3px; line-height: 1.6; }
.download-action { margin-left: 14px; flex-shrink: 0; }
.download-action a {
    display: inline-block;
    color: var(--c-link-alt);
    text-decoration: none;
    font-size: 13px;
    border: 1px solid var(--c-line);
    padding: 4px 16px;
    border-radius: 15px;
    white-space: nowrap;
    transition: all 0.2s;
}
.download-action a:hover {
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
    border-color: transparent;
    text-decoration: none;
}

/* ---------- 友情链接 ---------- */
.fl-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 28px;
    padding: 10px 4px 4px;
}
.fl-item { display: inline-flex; align-items: baseline; }
.fl-link {
    color: var(--c-link-alt);
    text-decoration: none;
    font-size: 14.5px;
}
.fl-link:hover { text-decoration: underline; }
.fl-desc { font-size: 12.5px; color: var(--c-text-3); margin-left: 7px; }

/* ---------- 联系方式（关于页） ---------- */
.contact-list { display: flex; flex-direction: column; margin-top: 6px; }
.contact-row {
    display: flex;
    align-items: center;
    padding: 13px 4px;
    border-bottom: 1px solid var(--c-line);
}
.contact-row:last-child { border-bottom: none; }
.contact-label {
    width: 76px;
    flex-shrink: 0;
    color: var(--c-text-3);
    font-size: 14px;
}
.contact-value {
    flex: 1;
    min-width: 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--c-text-1);
    word-break: break-all;
}
.contact-value a { color: var(--c-text-1); text-decoration: none; }
.contact-value a:hover { color: var(--c-accent); }
.copy-btn {
    border: 1px solid var(--c-line);
    background: transparent;
    cursor: pointer;
    color: var(--c-text-3);
    font-size: 12.5px;
    padding: 4px 14px;
    border-radius: 14px;
    margin-left: 14px;
    flex-shrink: 0;
    transition: all 0.2s;
}
.copy-btn:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
    background: rgba(102, 126, 234, 0.08);
}

/* ---------- 移动端 ---------- */
@media (max-width: 768px) {
    .index-section { margin-top: 35px; }
    .contact-label { width: 60px; }
    .theme-toggle { left: 12px; bottom: 12px; width: 42px; height: 42px; line-height: 42px; font-size: 18px; }
}

/* 暗色：文章分页 + 移动端折叠菜单 */
[data-theme="dark"] .post-pager .pg-btn{background:rgba(24,27,33,0.85);border-color:var(--c-line);color:var(--c-text-3);}
[data-theme="dark"] .post-pager .pg-btn:hover{border-color:var(--c-link);color:var(--c-link);}
[data-theme="dark"] .post-pager .pg-btn.active{color:#fff;}
[data-theme="dark"] .navbar-custom .navbar-collapse{background:rgba(24,27,33,0.97);box-shadow:none;}