:root {
      --bg: #0f172a;
      --panel: #111827;
      --accent: #38bdf8;
      --accent-soft: rgba(56, 189, 248, 0.15);
      --text: #e5e7eb;
      --muted: #9ca3af;
      --border: #1f2937;
      --error: #f97373;
      --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      padding: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: radial-gradient(circle at top, #1f2937 0, #020617 55%, #000 100%);
      color: var(--text);
      min-height: 100vh;
      display: flex;
      align-items: stretch;
      justify-content: center;
    }

    .app {
      width: 100%;
      max-width: 1200px;
      padding: 24px;
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.4fr);
      gap: 20px;
    }

    @media (max-width: 900px) {
      .app { grid-template-columns: 1fr; }
    }

    .card {
      background: linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.92));
      border-radius: 16px;
      border: 1px solid var(--border);
      box-shadow:
        0 18px 45px rgba(0, 0, 0, 0.65),
        0 0 0 1px rgba(148, 163, 184, 0.08);
      padding: 18px 18px 16px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      margin-bottom: 4px;
    }

    .title {
      font-size: 18px;
      font-weight: 600;
      letter-spacing: 0.02em;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .title-badge {
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.4);
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: 0.12em;
    }

    .subtitle {
      font-size: 13px;
      color: var(--muted);
    }

    .controls {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
      margin-top: 4px;
    }

    .file-input-wrapper {
      position: relative;
      display: inline-flex;
      align-items: center;
    }

    .file-input-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.5);
      background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0.9));
      color: var(--text);
      font-size: 13px;
      cursor: pointer;
      transition: all 0.15s ease-out;
    }

    .file-input-label:hover {
      border-color: var(--accent);
      box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.4);
      transform: translateY(-0.5px);
    }

    .file-input-label span.icon {
      width: 18px;
      height: 18px;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.9);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      color: var(--accent);
    }

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

    .select {
      position: relative;
      display: inline-flex;
      align-items: center;
      padding: 6px 10px;
      border-radius: 999px;
      border: 1px solid rgba(55, 65, 81, 0.9);
      background: rgba(15, 23, 42, 0.9);
      color: var(--muted);
      font-size: 12px;
      gap: 6px;
    }

    .select select {
      border: none;
      background: transparent;
      color: inherit;
      font-size: inherit;
      outline: none;
      padding-right: 14px;
      appearance: none;
      cursor: pointer;
    }

    .select::after {
      content: "▾";
      position: absolute;
      right: 8px;
      font-size: 10px;
      color: var(--muted);
      pointer-events: none;
    }

    .pill {
      font-size: 11px;
      padding: 3px 8px;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(55, 65, 81, 0.9);
      color: var(--muted);
    }

    .status {
      font-size: 12px;
      color: var(--muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .status-dot {
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: #4ade80;
      box-shadow: 0 0 0 4px rgba(74, 222, 128, 0.18);
    }

    .status-dot.idle {
      background: #6b7280;
      box-shadow: none;
    }

    .status-dot.error {
      background: #f97373;
      box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.18);
    }

    .log {
      flex: 1;
      border-radius: 12px;
      background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.98));
      border: 1px solid rgba(31, 41, 55, 0.95);
      padding: 10px 12px;
      font-family: var(--mono);
      font-size: 12px;
      color: var(--muted);
      overflow: auto;
      max-height: 260px;
      white-space: pre-wrap;
      word-break: break-word;
    }

    .log .error { color: var(--error); }
    .log .ok { color: #4ade80; }

    .json-viewer {
      flex: 1;
      border-radius: 12px;
      background: radial-gradient(circle at top right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.98));
      border: 1px solid rgba(31, 41, 55, 0.95);
      padding: 10px 12px;
      font-family: var(--mono);
      font-size: 12px;
      color: var(--muted);
      overflow: auto;
      max-height: 320px;
      white-space: pre;
    }

    .json-viewer .placeholder {
      color: #6b7280;
      font-style: italic;
    }

    .badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      font-size: 11px;
      color: var(--muted);
    }

    .badge-row span {
      padding: 2px 7px;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(31, 41, 55, 0.95);
    }

    .badge-row span.accent {
      border-color: rgba(56, 189, 248, 0.7);
      color: var(--accent);
      background: var(--accent-soft);
    }

    .hint {
      font-size: 11px;
      color: var(--muted);
      margin-top: 2px;
    }

    .hint code {
      font-family: var(--mono);
      background: rgba(15, 23, 42, 0.9);
      padding: 1px 4px;
      border-radius: 4px;
      border: 1px solid rgba(31, 41, 55, 0.9);
      font-size: 11px;
    }