:root {
      --bg-primary: #0a0a0a;
      --bg-card: #111113;
      --bg-card-hover: #161618;
      --bg-input: #0e0e10;
      --bg-elevated: #1a1a1e;
      --border: #222228;
      --border-focus: #3d3d44;
      --text-primary: #e4e4e7;
      --text-secondary: #71717a;
      --text-tertiary: #6e6e77;
      --accent: #2563eb;
      --accent-dim: #1d4ed8;
      --accent-glow: rgba(37, 99, 235, 0.15);
      --accent-glow-strong: rgba(37, 99, 235, 0.3);
      --success: #4ade80;
      --success-bg: rgba(74, 222, 128, 0.08);
      --error: #f87171;
      --error-bg: rgba(248, 113, 113, 0.08);
      --info: #60a5fa;
      --info-bg: rgba(96, 165, 250, 0.08);
      --radius: 10px;
      --radius-lg: 14px;
      --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
      --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
      --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* Subtle noise texture */
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      opacity: 0.025;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
      background-size: 200px 200px;
      pointer-events: none;
      z-index: 9999;
    }

    /* Top glow accent line */
    body::after {
      content: '';
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--accent) 30%, var(--accent) 70%, transparent);
      opacity: 0.4;
      z-index: 100;
    }

    .wrapper {
      max-width: 620px;
      margin: 0 auto;
      padding: 40px 20px 60px;
    }

    /* Header */
    .header {
      text-align: center;
      margin-bottom: 40px;
    }

    .header-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent-dim);
      background: var(--accent-glow);
      border: 1px solid rgba(163, 230, 53, 0.15);
      padding: 5px 12px;
      border-radius: 20px;
      margin-bottom: 16px;
    }

    .header-badge svg {
      width: 13px;
      height: 13px;
    }

    .header h1 {
      font-family: var(--font-mono);
      font-size: clamp(1.6rem, 5vw, 2rem);
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.03em;
      line-height: 1.1;
    }

    .header h1 span {
      color: var(--accent);
    }

    .header p {
      margin-top: 8px;
      color: var(--text-tertiary);
      font-size: 13px;
    }

    /* Cards */
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
      margin-bottom: 16px;
      transition: border-color var(--transition);
    }

    .card:hover {
      border-color: var(--border-focus);
    }

    .card-label {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-tertiary);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .card-label svg {
      width: 14px;
      height: 14px;
      color: var(--text-tertiary);
    }

    /* Form Controls */
    input[type="text"] {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      background: var(--bg-input);
      color: var(--text-primary);
      font-family: var(--font-mono);
      font-size: 14px;
      font-weight: 400;
      margin-bottom: 12px;
      transition: border-color var(--transition), box-shadow var(--transition);
      outline: none;
    }

    input[type="text"]::placeholder {
      color: var(--text-tertiary);
      font-family: var(--font-mono);
    }

    input[type="text"]:focus {
      border-color: var(--accent-dim);
      box-shadow: 0 0 0 3px var(--accent-glow);
    }

    input:-webkit-autofill {
      -webkit-box-shadow: 0 0 0 30px var(--bg-input) inset !important;
      -webkit-text-fill-color: var(--text-primary) !important;
    }

    select {
      padding: 10px 12px;
      border-radius: var(--radius);
      background: var(--bg-input);
      color: var(--text-primary);
      border: 1px solid var(--border);
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 500;
      flex: 1;
      min-width: 150px;
      outline: none;
      cursor: pointer;
      transition: border-color var(--transition);
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 10px center;
      padding-right: 32px;
    }

    select:focus {
      border-color: var(--accent-dim);
      box-shadow: 0 0 0 3px var(--accent-glow);
    }

    /* Checkbox */
    .checkbox-wrap {
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      user-select: none;
      white-space: nowrap;
    }

    .checkbox-wrap input[type="checkbox"] {
      appearance: none;
      width: 16px;
      height: 16px;
      border: 1.5px solid var(--border-focus);
      border-radius: 4px;
      background: var(--bg-input);
      cursor: pointer;
      position: relative;
      transition: all var(--transition);
      flex-shrink: 0;
    }

    .checkbox-wrap input[type="checkbox"]:checked {
      background: var(--accent-dim);
      border-color: var(--accent-dim);
    }

    .checkbox-wrap input[type="checkbox"]:checked::after {
      content: '';
      position: absolute;
      left: 4.5px;
      top: 1.5px;
      width: 5px;
      height: 8px;
      border: solid var(--bg-primary);
      border-width: 0 2px 2px 0;
      transform: rotate(45deg);
    }

    .checkbox-wrap span {
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
    }

    .options-row {
      display: flex;
      gap: 12px;
      margin-bottom: 12px;
      flex-wrap: wrap;
      align-items: center;
    }

    .note {
      font-size: 11px;
      color: var(--text-tertiary);
      line-height: 1.5;
      margin-bottom: 16px;
      font-family: var(--font-mono);
      padding: 10px 12px;
      background: rgba(255,255,255,0.02);
      border-radius: var(--radius);
      border-left: 2px solid var(--border);
    }

    /* Buttons */
    button {
      padding: 10px 20px;
      border: 1px solid transparent;
      border-radius: var(--radius);
      font-family: var(--font-sans);
      font-weight: 600;
      font-size: 13px;
      cursor: pointer;
      transition: all var(--transition);
      outline: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    .btn-primary {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }

    .btn-primary:hover {
      background: var(--accent-dim);
      border-color: var(--accent-dim);
      box-shadow: 0 0 20px var(--accent-glow);
    }

    .btn-primary:active {
      transform: scale(0.98);
    }

    .btn-secondary {
      background: var(--bg-elevated);
      color: var(--text-primary);
      border-color: var(--border);
    }

    .btn-secondary:hover {
      background: var(--bg-card-hover);
      border-color: var(--border-focus);
    }

    .btn-ghost {
      background: transparent;
      color: var(--text-secondary);
      border-color: transparent;
      padding: 8px 14px;
    }

    .btn-ghost:hover {
      color: var(--text-primary);
      background: rgba(255,255,255,0.04);
    }

    button:disabled {
      opacity: 0.35;
      cursor: not-allowed;
      pointer-events: none;
    }

    .btn-row {
      display: flex;
      gap: 8px;
    }

    .btn-row button {
      flex: 1;
    }

    /* Results */
    .results {
      margin-top: 16px;
    }

    /* App Item */
    .app-item {
      display: flex;
      align-items: center;
      padding: 14px;
      background: var(--bg-elevated);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 10px;
      gap: 12px;
      flex-wrap: wrap;
      transition: border-color var(--transition), background var(--transition);
    }

    .app-item:hover {
      border-color: var(--border-focus);
      background: var(--bg-card-hover);
    }

    .app-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      object-fit: cover;
      background: var(--bg-primary);
      flex-shrink: 0;
      border: 1px solid var(--border);
    }

    .app-info {
      flex: 1;
      min-width: 150px;
    }

    .app-info h3 {
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 3px;
      color: var(--text-primary);
    }

    .app-info .pkg {
      font-size: 12px;
      font-family: var(--font-mono);
      color: var(--text-tertiary);
      word-break: break-all;
    }

    .app-actions {
      display: flex;
      gap: 6px;
    }

    /* Messages */
    .msg {
      padding: 12px 14px;
      border-radius: var(--radius);
      margin-bottom: 10px;
      font-size: 13px;
      line-height: 1.5;
      border: 1px solid;
    }

    .msg.err {
      background: var(--error-bg);
      color: var(--error);
      border-color: rgba(248, 113, 113, 0.15);
    }

    .msg.ok {
      background: var(--success-bg);
      color: var(--success);
      border-color: rgba(74, 222, 128, 0.15);
    }

    .msg.info {
      background: var(--info-bg);
      color: var(--info);
      border-color: rgba(96, 165, 250, 0.12);
    }

    .msg strong {
      color: var(--text-primary);
      font-weight: 600;
    }

    .msg small {
      opacity: 0.7;
    }

    /* Loading */
    .loading {
      text-align: center;
      padding: 20px;
      color: var(--text-secondary);
      font-size: 13px;
    }

    .spinner {
      display: inline-block;
      width: 16px;
      height: 16px;
      border: 2px solid var(--border);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      margin-right: 8px;
      vertical-align: middle;
    }

    @keyframes spin { to { transform: rotate(360deg); } }

    /* Progress Bar */
    .progress {
      width: 100%;
      height: 4px;
      background: var(--bg-primary);
      border-radius: 2px;
      margin-top: 10px;
      overflow: hidden;
    }

    .progress-bar {
      height: 100%;
      background: linear-gradient(90deg, var(--accent-dim), var(--accent));
      border-radius: 2px;
      transition: width 0.3s ease;
      position: relative;
    }

    .progress-bar::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
      animation: shimmer 1.5s infinite;
    }

    @keyframes shimmer {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(100%); }
    }

    /* Indeterminate progress */
    .progress-indeterminate .progress-bar {
      width: 40% !important;
      animation: indeterminate 1.2s ease-in-out infinite;
    }

    @keyframes indeterminate {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(350%); }
    }

    a { text-decoration: none; }
    a button { width: 100%; }

    /* Divider */
    .divider {
      height: 1px;
      background: var(--border);
      margin: 8px 0 20px;
    }

    /* Fade-in animation */
    .fade-in {
      animation: fadeIn 0.3s ease;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Footer */
    .footer {
      text-align: center;
      margin-top: 32px;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }

    .footer p {
      font-size: 11px;
      font-family: var(--font-mono);
      color: var(--text-tertiary);
      letter-spacing: 0.02em;
    }

    .footer-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 10px;
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 500;
      color: var(--accent);
      text-decoration: none;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--accent-glow);
      transition: all var(--transition);
    }

    .footer-link:hover {
      color: var(--text-primary);
      border-color: var(--accent);
      background: var(--accent-glow);
    }

    .footer-link svg {
      opacity: 0.7;
      transition: opacity var(--transition);
    }

    .footer-link:hover svg {
      opacity: 1;
    }

    /* ADB Card */
    .adb-card {
      border: 1px dashed var(--border);
      background: var(--bg-card);
    }

    .adb-card.connected {
      border-color: var(--success);
      border-style: solid;
      background: var(--success-bg);
    }

    .adb-status {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 36px;
    }

    .adb-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--success);
      box-shadow: 0 0 6px var(--success);
      flex-shrink: 0;
    }

    .adb-device-name {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-primary);
      flex: 1;
    }

    .adb-device-name small {
      display: block;
      color: var(--text-secondary);
      font-size: 11px;
      margin-top: 2px;
    }

    .adb-unsupported {
      font-size: 12px;
      color: var(--text-tertiary);
      font-family: var(--font-mono);
    }

    .btn-install {
      background: #16a34a;
      color: #fff;
      border: none;
      padding: 8px 16px;
      border-radius: var(--radius);
      font-family: var(--font-sans);
      font-size: 13px;
      font-weight: 600;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: background var(--transition);
    }

    .btn-install:hover { background: #15803d; }
    .btn-install:disabled { opacity: 0.5; cursor: not-allowed; }

    .merge-tooltip {
      position: absolute;
      bottom: calc(100% + 8px);
      left: 50%;
      transform: translateX(-50%);
      background: var(--bg-elevated);
      border: 1px solid var(--border);
      color: var(--text-secondary);
      font-size: 11px;
      padding: 8px 12px;
      border-radius: var(--radius);
      white-space: nowrap;
      pointer-events: none;
      opacity: 0;
      transition: opacity var(--transition);
      z-index: 10;
    }

    .merge-tooltip.show { opacity: 1; }

    .checkbox-wrap { position: relative; }

    /* Stat Counter */
    .stat-counter {
      margin-top: 12px;
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-tertiary);
      letter-spacing: 0.02em;
    }

    .stat-counter span {
      color: var(--accent);
      font-weight: 600;
    }

    /* Log Panel */
    .log-panel {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      margin-bottom: 16px;
      overflow: hidden;
      transition: border-color var(--transition);
    }

    .log-panel:hover {
      border-color: var(--border-focus);
    }

    .log-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      cursor: pointer;
      user-select: none;
      transition: background var(--transition);
    }

    .log-header:hover {
      background: rgba(255,255,255,0.02);
    }

    .log-header-left {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .log-header .card-label {
      margin-bottom: 0;
    }

    .log-badge {
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 600;
      padding: 2px 7px;
      border-radius: 10px;
      background: var(--accent-glow);
      color: var(--accent-dim);
      min-width: 20px;
      text-align: center;
      transition: all var(--transition);
    }

    .log-badge.empty {
      background: rgba(255,255,255,0.04);
      color: var(--text-tertiary);
    }

    .log-toggle {
      width: 20px;
      height: 20px;
      color: var(--text-tertiary);
      transition: transform 0.2s ease;
    }

    .log-panel.open .log-toggle {
      transform: rotate(180deg);
    }

    .log-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }

    .log-panel.open .log-body {
      max-height: 400px;
    }

    .log-scroll {
      max-height: 300px;
      overflow-y: auto;
      padding: 0 16px 12px;
      scroll-behavior: smooth;
    }

    .log-scroll::-webkit-scrollbar {
      width: 4px;
    }

    .log-scroll::-webkit-scrollbar-track {
      background: transparent;
    }

    .log-scroll::-webkit-scrollbar-thumb {
      background: var(--border-focus);
      border-radius: 2px;
    }

    .log-entry {
      display: flex;
      gap: 8px;
      padding: 4px 0;
      font-family: var(--font-mono);
      font-size: 11px;
      line-height: 1.5;
      animation: logSlide 0.2s ease;
      border-bottom: 1px solid rgba(255,255,255,0.02);
    }

    .log-entry:last-child {
      border-bottom: none;
    }

    @keyframes logSlide {
      from { opacity: 0; transform: translateY(-4px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .log-time {
      color: var(--text-tertiary);
      flex-shrink: 0;
      opacity: 0.6;
    }

    .log-icon {
      flex-shrink: 0;
      width: 14px;
      text-align: center;
    }

    .log-icon.info { color: var(--info); }
    .log-icon.ok { color: var(--success); }
    .log-icon.err { color: var(--error); }
    .log-icon.warn { color: #fbbf24; }
    .log-icon.dl { color: var(--accent); }

    .log-msg {
      color: var(--text-secondary);
      word-break: break-word;
    }

    .log-empty {
      padding: 16px 0;
      text-align: center;
      color: var(--text-tertiary);
      font-family: var(--font-mono);
      font-size: 11px;
    }

    .log-actions {
      display: flex;
      justify-content: flex-end;
      padding: 0 16px 8px;
    }

    .log-clear-btn {
      font-family: var(--font-mono) !important;
      font-size: 10px !important;
      padding: 4px 8px !important;
      color: var(--text-tertiary) !important;
      border: none !important;
    }

    /* Pulsing dot for active operations */
    .log-active-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      animation: pulse 1.5s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 0.4; }
      50% { opacity: 1; }
    }

    /* Backup/Restore */
    .backup-card { display: none; }
    .backup-card.visible { display: block; }

    .backup-list {
      max-height: 300px;
      overflow-y: auto;
      margin-top: 12px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
    }

    .backup-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 12px;
      border-bottom: 1px solid var(--border);
      font-size: 12px;
      font-family: var(--font-mono);
    }

    .backup-item:last-child { border-bottom: none; }

    .backup-item input[type="checkbox"] {
      accent-color: var(--accent);
      flex-shrink: 0;
    }

    .backup-item .pkg-name {
      flex: 1;
      color: var(--text-primary);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .backup-item .pkg-status {
      font-size: 11px;
      flex-shrink: 0;
    }

    .backup-item .pkg-status.available { color: var(--success); }
    .backup-item .pkg-status.unavailable { color: var(--text-tertiary); }
    .backup-item .pkg-status.checking { color: var(--info); }

    .backup-summary {
      font-size: 12px;
      color: var(--text-secondary);
      margin-top: 8px;
      font-family: var(--font-mono);
    }

    .backup-actions {
      display: flex;
      gap: 8px;
      margin-top: 16px;
      padding-top: 4px;
      flex-wrap: wrap;
    }

    #backup-result {
      margin-top: 12px;
    }

    #backup-result .msg {
      margin-bottom: 12px;
    }

    .file-input-wrap {
      position: relative;
      display: inline-flex;
    }

    .file-input-wrap input[type="file"] {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
    }

    /* Mobile adjustments */
    @media (max-width: 480px) {
      .wrapper { padding: 24px 16px 40px; }
      .app-actions { width: 100%; }
      .app-actions button { flex: 1; }
      .btn-row button { padding: 10px 12px; font-size: 12px; }
      .log-scroll { max-height: 200px; }
    }