:root {
    --bg-color: #fafafa;
    --surface-color: #ffffff;
    --border-color: #eaeaea;
    --border-hover: #999;
    --text-primary: #111111;
    --text-secondary: #666666;
    --text-muted: #888888;
    --accent-color: #000000;
    --accent-hover: #333333;
    --link-color: #0070f3;
    --danger-color: #e00;
    --success-color: #0070f3;
    --sidebar-width: 240px;
    --header-height: 64px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --surface-color: #0a0a0a;
        --border-color: #333333;
        --text-primary: #ededed;
        --text-secondary: #a1a1aa;
        --accent-color: #ffffff;
        --accent-hover: #cccccc;
    }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-sans); background-color: var(--bg-color); color: var(--text-primary); line-height: 1.5; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: var(--link-color); }
ul { list-style: none; }

.app-container { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-width); background-color: var(--surface-color); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; left: 0; z-index: 100; transition: transform 0.3s ease; }
.sidebar-header { height: var(--header-height); display: flex; align-items: center; padding: 0 var(--space-lg); border-bottom: 1px solid var(--border-color); font-weight: 600; font-size: 1.1rem; letter-spacing: -0.02em; }
.sidebar-nav { padding: var(--space-md); flex: 1; overflow-y: auto; }
.nav-item { display: flex; align-items: center; padding: 10px 12px; margin-bottom: var(--space-xs); border-radius: 6px; color: var(--text-secondary); font-size: 0.95rem; cursor: pointer; transition: all 0.2s ease; }
.nav-item:hover { background-color: var(--bg-color); color: var(--text-primary); }
.nav-item.active { background-color: var(--border-color); color: var(--text-primary); font-weight: 500; }
.nav-item svg { margin-right: 12px; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.main-content { flex: 1; margin-left: var(--sidebar-width); display: flex; flex-direction: column; min-width: 0; }
.top-header { height: var(--header-height); background-color: var(--bg-color); border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; padding: 0 var(--space-lg); position: sticky; top: 0; z-index: 90; backdrop-filter: blur(8px); background-color: rgba(250, 250, 250, 0.8); }
.top-header-title { display: flex; align-items: center; }
.mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--text-primary); padding: 8px; margin-left: -8px; }
.page-title { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.02em; }
.user-profile { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--text-secondary); }
.avatar { width: 32px; height: 32px; border-radius: 50%; background-color: var(--border-color); display: flex; align-items: center; justify-content: center; font-weight: 600; color: var(--text-primary); }
.page-container { padding: var(--space-lg); display: none; animation: fadeIn 0.3s ease; }
.page-container.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.status-banner { display: none; margin: var(--space-md) var(--space-lg) 0; padding: 10px 12px; border: 1px solid var(--border-color); border-radius: 6px; color: var(--text-secondary); background: var(--surface-color); font-size: 0.875rem; }
.status-banner.is-visible { display: block; }
.status-banner.is-error { color: var(--danger-color); border-color: rgba(238, 0, 0, 0.25); }

.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-lg); }
.card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: var(--space-lg); display: flex; flex-direction: column; box-shadow: 0 1px 2px rgba(0,0,0,0.02); }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-md); }
.card-title { font-size: 0.875rem; color: var(--text-secondary); font-weight: 500; }
.card-value { font-size: 2rem; font-weight: 700; letter-spacing: -0.04em; color: var(--text-primary); }
.card-trend { font-size: 0.875rem; margin-top: var(--space-xs); }
.trend-up { color: #0070f3; }
.trend-down { color: var(--danger-color); }
.trend-neutral { color: var(--text-muted); }

.chart-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: var(--space-lg); margin-bottom: var(--space-lg); }
.chart-grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.chart-grid.region-primary-grid { grid-template-columns: 2fr 1fr; }
.chart-card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: var(--space-lg); box-shadow: 0 1px 2px rgba(0,0,0,0.02); display: flex; flex-direction: column; }
.chart-card.full-width { grid-column: 1 / -1; }
.chart-card-scroll { overflow-y: auto; max-height: 520px; }
.chart-card-narrow { max-width: 800px; }
.chart-card-separated { margin-bottom: var(--space-lg); }
.chart-container { width: 100%; height: 300px; margin-top: var(--space-md); }
.chart-container.map { height: 450px; }
.empty-state { min-height: 140px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); text-align: center; padding: var(--space-lg); }

.table-container { width: 100%; overflow-x: auto; }
.table-container-spaced { margin-top: var(--space-md); }
.numeric-column { text-align: right; }
.numeric-value-cell { text-align: right; font-weight: 500; }
.data-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.9rem; }
.data-table th, .data-table td { padding: 12px var(--space-md); border-bottom: 1px solid var(--border-color); }
.data-table th { color: var(--text-secondary); font-weight: 500; background-color: var(--bg-color); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background-color: rgba(0,0,0,0.02); }
.empty-table-cell { color: var(--text-muted); text-align: center; }

.filter-tabs { display: flex; gap: 8px; margin-bottom: var(--space-lg); background: var(--surface-color); padding: 4px; border-radius: 8px; border: 1px solid var(--border-color); width: max-content; max-width: 100%; overflow-x: auto; }
.filter-tab { padding: 6px 16px; border-radius: 6px; font-size: 0.875rem; cursor: pointer; color: var(--text-secondary); transition: all 0.2s; border: none; background: none; white-space: nowrap; }
.filter-tab.active { background: var(--accent-color); color: var(--surface-color); font-weight: 500; }
.filter-tab:disabled { cursor: wait; opacity: 0.65; }
.mod-version-tabs { margin-top: var(--space-md); margin-bottom: 0; }

.form-group { margin-bottom: var(--space-lg); display: flex; flex-direction: column; max-width: 600px; }
.form-label { font-size: 0.9rem; font-weight: 500; margin-bottom: var(--space-sm); color: var(--text-primary); }
.form-label-compact { margin-bottom: 0; }
.form-group-switch { flex-direction: row; justify-content: space-between; align-items: center; }
.form-actions-separated { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); margin-top: var(--space-xl); padding-top: var(--space-lg); border-top: 1px solid var(--border-color); }
.version-settings-title { margin-bottom: var(--space-lg); font-size: 1.2rem; font-weight: 500; }
.form-input, .form-textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border-color); border-radius: 6px; font-family: inherit; font-size: 0.95rem; background-color: var(--surface-color); color: var(--text-primary); transition: border-color 0.2s ease; }
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--border-hover); }
.form-input:read-only, .form-textarea:read-only { color: var(--text-secondary); background-color: var(--bg-color); }
.form-textarea { min-height: 120px; resize: vertical; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 6px; font-size: 0.95rem; font-weight: 500; cursor: pointer; transition: all 0.2s ease; border: none; }
.btn-primary { background-color: var(--accent-color); color: var(--surface-color); }
.btn-primary:hover { background-color: var(--accent-hover); }
.btn-quiet { background: var(--surface-color); color: var(--text-secondary); border: 1px solid var(--border-color); }
.btn-quiet:hover { color: var(--text-primary); border-color: var(--border-hover); }
.btn-danger { background: var(--danger-color); color: #fff; }
.btn-compact { padding: 6px 10px; font-size: 0.82rem; }
.btn:disabled { cursor: not-allowed; opacity: 0.55; }
.form-hint { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--border-color); transition: .3s; border-radius: 24px; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background-color: white; transition: .3s; border-radius: 50%; box-shadow: 0 2px 4px rgba(0,0,0,0.2); }
input:checked + .slider { background-color: var(--success-color); }
input:checked + .slider:before { transform: translateX(20px); }

.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-lg); margin-bottom: var(--space-lg); }
.section-heading h2, .settings-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 4px; }
.section-heading p, .settings-copy { color: var(--text-muted); font-size: 0.875rem; }
.filter-form { display: grid; grid-template-columns: repeat(5, minmax(120px, 1fr)) auto; gap: 10px; margin-bottom: var(--space-lg); }
.wide-table { margin-top: var(--space-sm); }
.wide-table .data-table { min-width: 1080px; }
.pagination-bar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); padding-top: var(--space-md); color: var(--text-muted); font-size: 0.85rem; }
.multiline-cell { white-space: pre-line; min-width: 130px; }
.inline-editor { display: grid; grid-template-columns: 1fr 1fr 1.3fr auto; gap: 10px; margin-bottom: var(--space-lg); padding: var(--space-md); border: 1px solid var(--border-color); border-radius: var(--radius-md); background: var(--bg-color); }
.is-hidden { display: none !important; }
.notice-panel { border: 1px solid var(--border-color); border-left: 3px solid var(--success-color); border-radius: var(--radius-md); padding: var(--space-md); margin-bottom: var(--space-lg); background: var(--bg-color); font-size: 0.875rem; }
.notice-panel p { margin-top: 8px; }
.notice-panel pre { margin-top: 10px; padding: 10px; overflow-x: auto; border-radius: 6px; background: var(--surface-color); color: var(--text-primary); }
.break-all { overflow-wrap: anywhere; }
.table-control { max-width: 150px; padding: 6px 8px; border: 1px solid var(--border-color); border-radius: 5px; background: var(--surface-color); color: var(--text-primary); }
.table-action { border: 0; background: none; color: var(--link-color); cursor: pointer; font: inherit; font-size: 0.82rem; }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--space-lg); }
.settings-copy { margin-bottom: var(--space-lg); }

.auth-body { min-height: 100vh; background: var(--bg-color); }
.auth-shell { min-height: 100vh; display: grid; place-items: center; padding: var(--space-lg); }
.auth-card { width: min(100%, 420px); padding: 36px; border: 1px solid var(--border-color); border-radius: var(--radius-lg); background: var(--surface-color); box-shadow: 0 12px 40px rgba(0,0,0,0.06); }
.auth-brand { display: inline-flex; padding: 5px 9px; margin-bottom: 28px; border-radius: 6px; background: var(--text-primary); color: var(--surface-color); font-size: 0.8rem; font-weight: 700; letter-spacing: .02em; }
.auth-card h1 { font-size: 1.55rem; letter-spacing: -0.03em; }
.auth-copy { margin: 8px 0 28px; color: var(--text-muted); font-size: 0.9rem; }
.auth-submit { width: 100%; }
.auth-error { min-height: 24px; margin-top: -10px; margin-bottom: 10px; color: var(--danger-color); font-size: 0.85rem; }
.auth-code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; }
.auth-divider { display: flex; align-items: center; gap: 12px; margin: -4px 0 18px; color: var(--text-muted); font-size: 0.8rem; }
.auth-divider::before, .auth-divider::after { content: ''; height: 1px; flex: 1; background: var(--border-color); }
.auth-link { display: block; margin-top: 18px; text-align: center; font-size: 0.85rem; }

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); box-shadow: 2px 0 12px rgba(0,0,0,0.1); }
    .main-content { margin-left: 0; }
    .mobile-menu-toggle { display: block; }
    .chart-grid, .chart-grid.cols-3, .chart-grid.region-primary-grid { grid-template-columns: minmax(0, 1fr); }
    .page-container { padding: var(--space-md); }
    .status-banner { margin-left: var(--space-md); margin-right: var(--space-md); }
    .filter-form, .inline-editor { grid-template-columns: minmax(0, 1fr); }
    .section-heading { flex-direction: column; }
    .user-profile #current-user-name { display: none; }
    .auth-card { padding: 28px 22px; }
    .mod-version-tabs .filter-tab { padding-left: 10px; padding-right: 10px; }
}