:root {
      --bg-base: #0d1117;
      --bg-surface: #161b22;
      --bg-surface-hover: #1c2128;
      --bg-subtle: #21262d;
      --border-color: #30363d;
      --border-hover: #58a6ff;
      --border-subtle: #21262d;
      --text-primary: #e6edf3;
      --text-secondary: #8b949e;
      --text-muted: #6e7681;
      --accent: #2f81f7;
      --accent-muted: rgba(56, 139, 253, 0.15);
      --success: #3fb950;
      --success-muted: rgba(63, 185, 80, 0.15);
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
      --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    }

    [data-theme="light"] {
      --bg-base: #f6f8fa;
      --bg-surface: #ffffff;
      --bg-surface-hover: #f3f4f6;
      --bg-subtle: #eaeef2;
      --border-color: #d0d7de;
      --border-hover: #0969da;
      --border-subtle: #e1e4e8;
      --text-primary: #1f2328;
      --text-secondary: #57606a;
      --text-muted: #8c959f;
      --accent: #0969da;
      --accent-muted: rgba(9, 105, 218, 0.1);
      --success: #1a7f37;
      --success-muted: rgba(26, 127, 55, 0.12);
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--text-primary);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      line-height: 1.5;
      font-size: 14px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 24px 20px 48px;
      width: 100%;
    }

    /* Top Navigation Bar */
    .topbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 20px;
      margin-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      flex-wrap: wrap;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-icon {
      width: 32px;
      height: 32px;
      border-radius: 6px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-primary);
    }

    .brand-info {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .brand-name {
      font-size: 16px;
      font-weight: 600;
      letter-spacing: -0.2px;
    }

    .badge-static {
      font-size: 11px;
      font-family: var(--font-mono);
      padding: 2px 7px;
      border-radius: 4px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      color: var(--text-secondary);
    }

    .topbar-right {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .clock {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-secondary);
      padding: 5px 10px;
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      background: var(--bg-surface);
    }

    .btn-action {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      color: var(--text-secondary);
      height: 32px;
      padding: 0 10px;
      border-radius: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      font-size: 12px;
    }

    .btn-action:hover {
      border-color: var(--border-hover);
      color: var(--text-primary);
      background: var(--bg-surface-hover);
    }

    /* Search & Command Bar */
    .search-wrap {
      max-width: 640px;
      margin: 0 auto 24px;
    }

    .search-bar {
      display: flex;
      align-items: center;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 8px 14px;
      gap: 10px;
      box-shadow: var(--shadow-sm);
    }

    .search-bar:focus-within {
      border-color: var(--accent);
    }

    .search-bar svg {
      color: var(--text-muted);
      flex-shrink: 0;
    }

    .search-input {
      flex: 1;
      background: transparent;
      border: none;
      outline: none;
      color: var(--text-primary);
      font-size: 13px;
    }

    .search-input::placeholder {
      color: var(--text-muted);
    }

    .kbd {
      font-family: var(--font-mono);
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
    }

    .search-engines {
      display: flex;
      gap: 6px;
      margin-top: 8px;
      justify-content: center;
    }

    .engine-chip {
      font-size: 11px;
      font-family: var(--font-mono);
      padding: 2px 8px;
      border-radius: 4px;
      background: transparent;
      border: 1px solid transparent;
      color: var(--text-muted);
      cursor: pointer;
    }

    .engine-chip.active, .engine-chip:hover {
      background: var(--bg-surface);
      border-color: var(--border-color);
      color: var(--text-primary);
    }

    /* Section Headers */
    .section-header {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.6px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* Telemetry Section (Public-Safe System Status) */
    .system-section {
      margin-bottom: 28px;
    }

    .telemetry-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 14px 18px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
      gap: 16px;
      box-shadow: var(--shadow-sm);
    }

    .metric-box {
      display: flex;
      flex-direction: column;
      gap: 5px;
    }

    .metric-top {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
    }

    .metric-label {
      font-size: 12px;
      color: var(--text-secondary);
    }

    .metric-val {
      font-size: 14px;
      font-weight: 600;
      font-family: var(--font-mono);
      color: var(--text-primary);
    }

    .meter-bar {
      height: 4px;
      border-radius: 2px;
      background: var(--bg-subtle);
      overflow: hidden;
      margin: 2px 0;
    }

    .meter-fill {
      height: 100%;
      background: var(--accent);
      border-radius: 2px;
      transition: width 0.4s ease;
    }

    .metric-sub {
      font-size: 11px;
      color: var(--text-muted);
      font-family: var(--font-mono);
    }

    .telemetry-offline {
      background: var(--bg-surface);
      border: 1px dashed var(--border-color);
      border-radius: 8px;
      padding: 12px 16px;
      font-size: 12px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
    }

    .telemetry-offline code {
      font-family: var(--font-mono);
      font-size: 11px;
      background: var(--bg-subtle);
      padding: 2px 6px;
      border-radius: 4px;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
    }

    /* Hero App Box: IT-Tools */
    .hero-section {
      margin-bottom: 28px;
    }

    .hero-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 18px;
    }

    .hero-title-area {
      display: flex;
      gap: 14px;
      align-items: center;
    }

    .hero-icon-box {
      width: 42px;
      height: 42px;
      border-radius: 6px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-primary);
      flex-shrink: 0;
    }

    .hero-name-row {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .hero-name {
      font-size: 16px;
      font-weight: 600;
    }

    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--success);
      padding: 2px 6px;
      border-radius: 4px;
      background: var(--success-muted);
    }

    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--success);
    }

    .hero-desc {
      color: var(--text-secondary);
      font-size: 13px;
      margin-top: 4px;
      max-width: 780px;
    }

    .btn-open {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--text-primary);
      color: var(--bg-base);
      font-weight: 500;
      font-size: 13px;
      padding: 6px 14px;
      border-radius: 6px;
      border: none;
      cursor: pointer;
    }

    .btn-open:hover {
      opacity: 0.9;
    }

    .quick-links-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 8px;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
    }

    .quick-link-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 7px 10px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      font-size: 12px;
      color: var(--text-secondary);
      transition: all 0.15s ease;
    }

    .quick-link-item:hover {
      background: var(--bg-surface-hover);
      border-color: var(--border-color);
      color: var(--text-primary);
    }

    .quick-link-item svg {
      color: var(--text-muted);
      flex-shrink: 0;
    }

    /* Daily News Aggregator Section */
    .news-section {
      margin-bottom: 28px;
    }

    .news-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px 18px;
      box-shadow: var(--shadow-sm);
    }

    .news-header-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 12px;
      padding-bottom: 10px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .news-source-tabs {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .news-tab-btn {
      background: var(--bg-subtle);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 6px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.15s ease;
    }

    .news-tab-btn:hover {
      color: var(--text-primary);
      border-color: var(--border-color);
    }

    .news-tab-btn.active {
      background: var(--accent-muted);
      border-color: var(--accent);
      color: var(--accent);
      font-weight: 500;
    }

    .news-tab-badge {
      font-family: var(--font-mono);
      font-size: 10px;
      padding: 1px 5px;
      border-radius: 10px;
      background: var(--bg-surface);
      opacity: 0.9;
    }

    .news-meta-text {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-muted);
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .news-item {
      background: var(--bg-subtle);
      border: 1px solid var(--border-subtle);
      border-radius: 6px;
      padding: 10px 12px;
      transition: all 0.15s ease;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .news-item:hover {
      border-color: var(--border-hover);
      background: var(--bg-surface-hover);
    }

    .news-item-top {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 10px;
      flex-wrap: wrap;
    }

    .news-item-title {
      font-size: 13px;
      font-weight: 500;
      color: var(--text-primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .news-item-title:hover {
      color: var(--accent);
    }

    .news-badges {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .news-badge {
      font-family: var(--font-mono);
      font-size: 10px;
      padding: 1px 6px;
      border-radius: 4px;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      color: var(--text-muted);
    }

    .news-badge.highlight {
      color: var(--success);
      border-color: var(--success-muted);
      background: var(--success-muted);
    }

    .news-badge.lang {
      color: var(--text-secondary);
    }

    .news-desc {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.45;
    }

    .news-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 2px;
      font-size: 11px;
      color: var(--text-muted);
      font-family: var(--font-mono);
    }

    .news-link-btn {
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .news-link-btn:hover {
      text-decoration: underline;
    }

    .news-empty-box {
      border: 1px dashed var(--border-color);
      border-radius: 6px;
      padding: 18px;
      text-align: center;
      color: var(--text-muted);
      font-size: 12px;
    }

    .news-empty-box code {
      font-family: var(--font-mono);
      background: var(--bg-subtle);
      padding: 2px 5px;
      border-radius: 4px;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
    }

    /* Grid of Cards */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 12px;
      margin-bottom: 28px;
    }

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 14px 16px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 10px;
      box-shadow: var(--shadow-sm);
      min-height: 108px;
    }

    .card:hover {
      border-color: var(--border-hover);
      background: var(--bg-surface-hover);
    }

    .card-head {
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .card-icon {
      width: 28px;
      height: 28px;
      border-radius: 4px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .card-info {
      flex: 1;
      min-width: 0;
    }

    .card-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
    }

    .card-url {
      font-family: var(--font-mono);
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 1px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .card-desc {
      font-size: 12px;
      color: var(--text-secondary);
      line-height: 1.4;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .card-footer {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .tag {
      font-family: var(--font-mono);
      font-size: 10px;
      padding: 1px 6px;
      border-radius: 3px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-subtle);
      color: var(--text-muted);
    }

    .tag.ready {
      color: var(--success);
      border-color: var(--success-muted);
    }

    /* Category Nav Tabs */
    .tabs-bar {
      display: flex;
      gap: 6px;
      margin-bottom: 14px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 8px;
      overflow-x: auto;
    }

    .tab-btn {
      background: transparent;
      border: none;
      color: var(--text-secondary);
      font-size: 13px;
      padding: 4px 10px;
      border-radius: 6px;
      cursor: pointer;
    }

    .tab-btn.active, .tab-btn:hover {
      background: var(--bg-surface);
      color: var(--text-primary);
    }

    /* Subtle Info Notice */
    .note-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 12px 16px;
      font-size: 12px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 16px;
    }

    .note-box svg {
      color: var(--text-muted);
      flex-shrink: 0;
    }

    .note-box code {
      font-family: var(--font-mono);
      font-size: 11px;
      background: var(--bg-subtle);
      padding: 1px 5px;
      border-radius: 4px;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
    }

    /* Modal */
    .modal-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 100;
      padding: 20px;
    }

    .modal-backdrop.open {
      display: flex;
    }

    .modal {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 20px;
      width: 100%;
      max-width: 400px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    }

    .modal h3 {
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 14px;
    }

    .field {
      margin-bottom: 12px;
    }

    .field label {
      display: block;
      font-size: 12px;
      color: var(--text-secondary);
      margin-bottom: 4px;
    }

    .field input {
      width: 100%;
      padding: 7px 10px;
      background: var(--bg-base);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: var(--text-primary);
      font-size: 13px;
      outline: none;
    }

    .field input:focus {
      border-color: var(--accent);
    }

    .modal-footer {
      display: flex;
      justify-content: flex-end;
      gap: 8px;
      margin-top: 16px;
    }

    .btn-cancel {
      background: transparent;
      border: 1px solid var(--border-color);
      color: var(--text-secondary);
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 12px;
      cursor: pointer;
    }

    .btn-submit {
      background: var(--text-primary);
      color: var(--bg-base);
      border: none;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
    }

    /* Footer */
    .footer {
      margin-top: auto;
      padding: 20px;
      text-align: center;
      border-top: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 12px;
      font-family: var(--font-mono);
    }

    @media (max-width: 640px) {
      .topbar {
        flex-direction: column;
        align-items: flex-start;
      }
      .quick-links-bar {
        grid-template-columns: 1fr 1fr;
      }
      .telemetry-panel {
        grid-template-columns: 1fr 1fr;
      }
    }