html, body { height: 100%; margin: 0; box-sizing: border-box; }
    * { box-sizing: border-box; }
    body {
      font-family: 'Plus Jakarta Sans', sans-serif;
      min-height: 100vh;
      color: white;
      background:
        radial-gradient(circle at 12% 18%, rgba(34, 197, 94, 0.12), transparent 25%),
        radial-gradient(circle at 82% 14%, rgba(59, 130, 246, 0.18), transparent 28%),
        radial-gradient(circle at 50% 100%, rgba(139, 92, 246, 0.18), transparent 35%),
        linear-gradient(135deg, #09111f 0%, #0f172a 38%, #151b3b 68%, #0b1220 100%);
      background-attachment: fixed;
      overflow-x: hidden;
      overflow-y: auto;
    }
    .card-gradient {
      background: linear-gradient(180deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.96));
      border: 1px solid rgba(148, 163, 184, 0.16);
      box-shadow: 0 24px 60px rgba(2, 6, 23, 0.32);
    }
    .glass-panel {
      background: rgba(15, 23, 42, 0.64);
      border: 1px solid rgba(148, 163, 184, 0.14);
      backdrop-filter: blur(16px);
    }
    .editor-font { font-family: 'JetBrains Mono', monospace; }
    .tab-btn {
      transition: all 0.2s ease;
    }
    .tab-btn.active {
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(124, 58, 237, 0.95));
      color: white;
      box-shadow: 0 10px 24px rgba(59, 130, 246, 0.22);
    }
    .tab-btn.inactive {
      background: rgba(15, 23, 42, 0.55);
      color: #93c5fd;
      border: 1px solid rgba(59, 130, 246, 0.14);
    }
    .tab-btn.inactive:hover {
      background: rgba(30, 41, 59, 0.75);
      color: white;
    }
    .editor-surface {
      background: #09101d;
      border: 1px solid rgba(59, 130, 246, 0.12);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    }
    .editor-surface.drag-over {
      border-color: rgba(96, 165, 250, 0.7);
      box-shadow: inset 0 0 0 1px rgba(96, 165, 250, 0.38), 0 0 0 4px rgba(59, 130, 246, 0.14);
    }
    .editor-stack {
      position: absolute;
      inset: 0;
      overflow: hidden;
    }
    .drop-hint {
      position: absolute;
      inset: 1rem;
      border-radius: 1.1rem;
      border: 1px dashed rgba(96, 165, 250, 0.42);
      background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(59, 130, 246, 0.08));
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 1.25rem;
      color: #bfdbfe;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s ease;
      z-index: 5;
    }
    .editor-surface.drag-over .drop-hint {
      opacity: 1;
    }
    .highlight-layer,
    .editor-area {
      padding: 1.25rem;
      line-height: 1.65;
      tab-size: 2;
      font-size: 14px;
      white-space: pre-wrap;
      word-break: break-word;
      overflow: auto;
    }
    .highlight-layer {
      margin: 0;
      color: #dbeafe;
      pointer-events: none;
    }
    .editor-area {
      background: transparent;
      color: transparent;
      caret-color: #60a5fa;
      border: 0;
      resize: none;
      outline: none;
      width: 100%;
      height: 100%;
      position: absolute;
      inset: 0;
    }
    .editor-area::placeholder {
      color: rgba(148, 163, 184, 0.65);
    }
    .editor-area::selection {
      background: rgba(96, 165, 250, 0.28);
      color: transparent;
    }
    .token-tag { color: #7dd3fc; }
    .token-attr { color: #f9a8d4; }
    .token-string { color: #86efac; }
    .token-comment { color: #64748b; }
    .token-keyword { color: #c4b5fd; }
    .token-selector { color: #f0abfc; }
    .token-property { color: #7dd3fc; }
    .token-number { color: #fdba74; }
    .token-function { color: #93c5fd; }
    .token-plain { color: #dbeafe; }
    .preview-frame {
      width: 100%;
      height: 100%;
      border: 0;
      background: white;
    }
    .top-action {
      background: rgba(255,255,255,0.12);
      border: 1px solid rgba(255,255,255,0.18);
      backdrop-filter: blur(10px);
      transition: all 0.2s ease;
    }
    .top-action:hover {
      background: rgba(255,255,255,0.2);
    }
    .primary-action {
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
      box-shadow: 0 12px 28px rgba(59, 130, 246, 0.2);
      transition: all 0.2s ease;
    }
    .primary-action:hover {
      transform: translateY(-1px);
      box-shadow: 0 16px 36px rgba(59, 130, 246, 0.28);
    }
    .success-toast {
      background: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
      box-shadow: 0 14px 36px rgba(22, 163, 74, 0.28);
    }
    .scrollbar-thin::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }
    .scrollbar-thin::-webkit-scrollbar-track {
      background: rgba(15, 23, 42, 0.7);
      border-radius: 999px;
    }
    .scrollbar-thin::-webkit-scrollbar-thumb {
      background: rgba(96, 165, 250, 0.45);
      border-radius: 999px;
    }
    .fullscreen-shell {
      background: white;
    }
    .global-search {
      position: relative;
      width: min(38vw, 320px);
      z-index: 70;
    }
    .global-search-input {
      width: 100%;
      height: 42px;
      padding: 0 0.95rem 0 2.75rem;
      border-radius: 12px;
      background: rgba(255,255,255,0.1);
      border: 1px solid rgba(255,255,255,0.16);
      color: white;
      backdrop-filter: blur(10px);
      transition: all 0.2s ease;
    }
    .global-search-input::placeholder {
      color: rgba(226, 232, 240, 0.72);
    }
    .global-search-input:focus {
      outline: none;
      background: rgba(255,255,255,0.14);
      border-color: rgba(147, 197, 253, 0.45);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.16);
    }
    .global-search-icon {
      position: absolute;
      left: 0.9rem;
      top: 50%;
      transform: translateY(-50%);
      color: rgba(191, 219, 254, 0.92);
      pointer-events: none;
      z-index: 2;
    }
    .global-search-results {
      position: absolute;
      top: calc(100% + 0.65rem);
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.96);
      border: 1px solid rgba(148, 163, 184, 0.16);
      border-radius: 18px;
      box-shadow: 0 24px 50px rgba(2, 6, 23, 0.42);
      overflow: hidden;
      z-index: 65;
    }
    .global-search-results.hidden {
      display: none;
    }
    .global-search-item {
      width: 100%;
      border: 0;
      background: transparent;
      color: white;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 0.9rem 1rem;
      text-align: left;
      transition: background 0.2s ease;
    }
    .global-search-item:hover,
    .global-search-item.active {
      background: rgba(59, 130, 246, 0.12);
    }
    .global-search-kicker {
      display: block;
      font-size: 0.68rem;
      text-transform: uppercase;
      letter-spacing: 0.16em;
      color: rgba(148, 163, 184, 0.88);
      margin-bottom: 0.12rem;
    }
    .global-search-route {
      font-size: 0.74rem;
      color: rgba(148, 163, 184, 0.9);
    }
    .global-search-empty {
      padding: 0.95rem 1rem;
      color: rgba(148, 163, 184, 0.95);
      font-size: 0.92rem;
    }
    .search-focus-overlay {
      position: fixed;
      inset: 0;
      background: rgba(7, 11, 24, 0.26);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      opacity: 1;
      transition: opacity 0.22s ease;
      z-index: 45;
      pointer-events: none;
    }
    .search-focus-overlay.hidden {
      display: none;
    }
    @media (max-width: 900px) {
      .global-search {
        width: min(100%, 220px);
      }
      .global-search-input {
        height: 40px;
      }
    }
    @media (max-width: 640px) {
      #app {
        min-height: 100vh;
      }
      header {
        height: auto !important;
      }
      .global-search {
        display: none;
      }
      .global-search.mobile-open {
        display: block;
        position: absolute;
        top: calc(100% + 10px);
        left: 16px;
        right: 16px;
        width: auto;
      }
      .global-search-results {
        max-height: min(60vh, 380px);
        overflow-y: auto;
      }
      main {
        padding: 0.75rem !important;
      }
      main > div {
        height: auto !important;
        min-height: 0;
      }
      section.glass-panel {
        padding: 1.1rem !important;
        border-radius: 1.35rem !important;
      }
      section.glass-panel h2 {
        font-size: 1.65rem !important;
        line-height: 1.2 !important;
      }
      section.flex-1.min-h-0.grid {
        min-height: auto !important;
        display: flex !important;
        flex-direction: column !important;
      }
      section.flex-1.min-h-0.grid > div {
        min-height: auto !important;
      }
      .editor-surface {
        min-height: 360px;
      }
      #preview-frame {
        min-height: 360px;
      }
      footer {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
      }
      #toast {
        left: 0.75rem !important;
        right: 0.75rem !important;
        bottom: 1rem !important;
        width: auto;
        transform: translateY(20px) !important;
      }
    }