:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #1f6feb;
    --border: #30363d;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
    --radius: 8px;
    --shadow: 0 4px 12px rgba(0,0,0,0.3);
}
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #eaeef2;
    --text-primary: #1f2328;
    --text-secondary: #656d76;
    --accent: #0969da;
    --accent-hover: #0860ca;
    --border: #d0d7de;
    --success: #1a7f37;
    --warning: #9a6700;
    --danger: #cf222e;
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background .2s, color .2s;
}
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
}
.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-header h1 { font-size: 18px; }
.sidebar-header .version {
    font-size: 11px;
    background: var(--accent);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
}
.search-box { padding: 12px; border-bottom: 1px solid var(--border); }
.search-box input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
}
.search-box input:focus { outline: none; border-color: var(--accent); }
.nav-scroll { flex: 1; overflow-y: auto; }
.nav-section { padding: 8px 0; }
.nav-section-title {
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    border-left: 3px solid transparent;
}
.nav-item:hover, .nav-item.active {
    background: var(--bg-tertiary);
    border-left-color: var(--accent);
}
.nav-item .icon { font-size: 16px; width: 22px; text-align: center; }
.nav-item .fav { margin-left: auto; opacity: 0.3; cursor: pointer; user-select: none; }
.nav-item .fav.active { opacity: 1; color: var(--warning); }
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}
.main {
    margin-left: 280px;
    flex: 1;
    padding: 24px;
    max-width: calc(100% - 280px);
}
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 10px;
}
.toolbar h2 { font-size: 22px; }
.toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s;
}
.btn:hover { background: var(--bg-tertiary); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-sm { padding: 3px 8px; font-size: 12px; }
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}
.card h3 { margin-bottom: 12px; font-size: 16px; }
.card h4 { font-size: 14px; margin-bottom: 6px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 500; }
.form-control {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
    font-family: monospace;
}
.form-control:focus { outline: none; border-color: var(--accent); }
textarea.form-control { min-height: 140px; resize: vertical; }
select.form-control { cursor: pointer; }
.result-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    margin-top: 12px;
    font-family: monospace;
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 500px;
    overflow-y: auto;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.flex-gap { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 12px;
    margin: 2px;
    border: 1px solid var(--border);
}
.tag-success { background: var(--success); color: #fff; border-color: var(--success); }
.tag-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.tag-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.tag-info { background: var(--accent); color: #fff; border-color: var(--accent); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 8px; }
table.data-table th, table.data-table td {
    padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border);
}
table.data-table th { background: var(--bg-tertiary); }
table.data-table tr:hover td { background: var(--bg-tertiary); }
.shortcuts-panel {
    position: fixed;
    bottom: 20px; right: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    display: none;
    z-index: 1000;
}
.shortcuts-panel.show { display: block; }
.shortcuts-panel p { margin: 6px 0; font-size: 13px; }
.shortcuts-panel kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 12px;
}
.mobile-toggle {
    display: none;
    position: fixed;
    top: 12px; left: 12px;
    z-index: 200;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 8px 12px;
    cursor: pointer;
    color: var(--text-primary);
}
.toast {
    position: fixed;
    bottom: 20px; left: 50%;
    transform: translateX(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px 20px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 2000;
}
.toast.show { opacity: 1; }
.hint { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.split-layout { display: flex; gap: 0; }
.split-layout .main { margin-left: 0; max-width: 100%; }
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-left: 0; max-width: 100%; padding: 16px; padding-top: 60px; }
    .mobile-toggle { display: block; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}
@media print {
    .sidebar, .toolbar, .mobile-toggle { display: none !important; }
    .main { margin-left: 0; max-width: 100%; }
}