:root {
      --bg: #FFFFFF;
      --card: #FFFFFF;
      --border: #E8E8E8;
      --text: #111111;
      --muted: #888888;
      --soft: #F5F5F5;
      --soft-cyan: #F3FCFB;
      --soft-blue: #F3F9FF;
      --soft-purple: #F3F4FF;
      --warn: #FFF8ED;
      --warn-border: #F0D99A;
      --warn-text: #7A5C10;
      --hd-dark: #0D0F1A;
      --hd-cyan: #00E5C8;
      --hd-blue: #37ABFF;
      --hd-purple: #6D82FC;
      --hd-green: #02F1BF;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 2px 8px rgba(0,0,0,0.07), 0 6px 24px rgba(0,0,0,0.05);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      background: var(--bg);
      font-family: 'Montserrat', system-ui, sans-serif;
      color: var(--text);
      font-size: 14px;
      line-height: 1.5;
    }
    .app {
      display: grid;
      grid-template-columns: 280px minmax(0, 1fr);
      min-height: 100vh;
      width: 100%;
      background: var(--bg);
      color: var(--text);
      overflow: hidden;
      box-sizing: border-box;
    }

    .sidebar {
      background: var(--hd-dark);
      color: #fff;
      box-shadow: 2px 0 20px rgba(0,0,0,0.15);
      padding: 32px 20px;
      position: sticky;
      top: 0;
      height: 100vh;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
    }
    .sidebar-brand {
      margin-bottom: 28px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding-bottom: 20px;
    }
    .sidebar-logo { font-size: 15px; font-weight: 800; letter-spacing: -0.3px; color: #fff; margin-bottom: 4px; }
    .sidebar-tagline { font-size: 10px; color: var(--hd-cyan); letter-spacing: 1px; text-transform: uppercase; font-weight: 600; }
    .sidebar-copy { margin-top: 10px; color: rgba(255,255,255,.58); font-size: 11px; line-height: 1.6; }
    .sidebar-divider { height: 1px; background: rgba(255,255,255,0.08); margin: 18px 0; }
    .sidebar-section-label { font-size: 9px; letter-spacing: 1.4px; text-transform: uppercase; color: rgba(255,255,255,0.6); margin-bottom: 8px; padding-left: 4px; }
    .nav-item {
      display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 10px;
      cursor: pointer; transition: background .15s, color .15s; margin-bottom: 2px; border: none;
      background: none; color: rgba(255,255,255,0.7); font-family: inherit; font-size: 12.5px; font-weight: 500;
      width: 100%; text-align: left;
    }
    .nav-item:hover { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.95); }
    .nav-item.active { background: rgba(0,229,200,0.12); color: var(--hd-cyan); font-weight: 700; }
    .nav-dot { width: 6px; height: 6px; border-radius: 50%; background: rgba(255,255,255,0.2); transition: background .15s; }
    .nav-item.active .nav-dot { background: var(--hd-cyan); box-shadow: 0 0 6px var(--hd-cyan); }

    .sidebar-score { margin-top: auto; padding-top: 20px; }
    .score-card-side {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 14px;
      padding: 16px;
    }
    .score-label-side { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: rgba(255,255,255,0.6); margin-bottom: 8px; }
    .score-number-side { font-size: 34px; font-weight: 800; color: var(--hd-cyan); line-height: 1; }
    .score-tag-side { font-size: 11px; color: rgba(255,255,255,0.78); margin-top: 6px; font-weight: 600; }
    .score-bars-side { margin-top: 14px; display: flex; flex-direction: column; gap: 7px; }
    .score-bar-row { display: flex; align-items: center; gap: 8px; }
    .score-bar-label { font-size: 10px; color: rgba(255,255,255,0.7); width: 70px; flex-shrink: 0; }
    .score-bar-track { flex: 1; height: 4px; background: rgba(255,255,255,0.1); border-radius: 99px; overflow: hidden; }
    .score-bar-fill { height: 100%; background: linear-gradient(90deg, var(--hd-cyan), var(--hd-blue)); border-radius: 99px; transition: width .4s ease; }
    .score-val { font-size: 10px; color: rgba(255,255,255,0.75); width: 22px; text-align: right; }
    .sidebar-actions { margin-top: 18px; display: flex; flex-direction: column; gap: 8px; }
    .sidebar-btn { padding: 10px 14px; border-radius: 10px; font-size: 12px; font-weight: 700; cursor: pointer; transition: all .15s; border: none; text-align: center; }
    .sidebar-btn-primary { background: var(--hd-cyan); color: var(--hd-dark); }
    .sidebar-btn-primary:hover { opacity: .92; }
    .sidebar-btn-ghost { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.9); border: 1px solid rgba(255,255,255,0.08); }

    .main { padding: 40px 48px 90px; max-width: 1180px; min-width: 0; overflow-x: hidden; }
    .main::before {
      content: ''; display: block; height: 3px;
      background: linear-gradient(90deg, var(--hd-cyan), var(--hd-blue), var(--hd-purple));
      border-radius: 0 0 4px 4px; margin: -40px -48px 36px;
    }
    @media (max-width: 1100px) { .main { padding: 32px 28px 90px; } }

    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 32px; flex-wrap: wrap;
    }
    .topbar-left h1 { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; line-height: 1.15; color: var(--hd-dark); }
    .topbar-left p { font-size: 13px; color: var(--muted); margin-top: 4px; max-width: 760px; }
    .topbar-pills { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
    .pill {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 12px;
      color: var(--muted);
      box-shadow: var(--shadow);
    }
    .progress-wrap {
      width: 160px; height: 8px; border-radius: 999px; background: var(--soft); border: 1px solid var(--border); overflow: hidden;
    }
    .progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--hd-cyan), var(--hd-blue)); transition: width .35s ease; }

    .section { display: none; }
    .section.active { display: block; }
    .card {
      background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); margin-bottom: 18px;
    }
    .card-title { font-size: 18px; font-weight: 800; letter-spacing: -.3px; margin-bottom: 4px; }
    .card-hint { font-size: 13px; color: var(--muted); margin-bottom: 24px; }

    .grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .span2 { grid-column: 1 / -1; }
    @media (max-width: 760px) { .grid, .grid-3 { grid-template-columns: 1fr; } }

    .field { display: flex; flex-direction: column; gap: 6px; }
    .field label, .fieldset-title {
      font-size: 12px; font-weight: 600; color: var(--muted); letter-spacing: .2px; text-transform: uppercase;
    }
    .field small { font-size: 11px; color: var(--muted); }
    input[type="text"], input[type="url"], input[type="number"], textarea, select {
      width: 100%; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px;
      font-family: inherit; font-size: 13px; color: var(--text); outline: none; transition: all .15s;
    }
    textarea { min-height: 96px; resize: vertical; }
    input:focus, textarea:focus, select:focus { border-color: var(--hd-blue); box-shadow: 0 0 0 4px rgba(55,171,255,0.08); }

    .checks { display: flex; flex-wrap: wrap; gap: 8px; }
    .check-chip {
      background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 10px 12px; font-size: 12px; color: var(--muted); cursor: pointer; transition: all .15s;
    }
    .check-chip:has(input:checked) { background: var(--text); color: #fff; border-color: var(--text); }
    .check-chip input { display: none; }

    .subsection {
      border-top: 1px solid var(--border); margin-top: 22px; padding-top: 16px;
    }
    .subsection-title {
      font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--hd-dark); margin-bottom: 14px; display: flex; align-items: center; gap: 8px;
    }
    .subsection-title::after { content: ''; flex: 1; height: 1px; background: linear-gradient(90deg, var(--hd-cyan), transparent); opacity: .35; }

    .info-banner, .alert-box {
      border-radius: var(--radius-sm); padding: 14px 16px; margin-bottom: 18px; font-size: 13px;
    }
    .info-banner { background: linear-gradient(135deg, var(--soft-cyan), var(--soft-blue)); border: 1px solid var(--border); }
    .alert-box { background: var(--warn); border: 1px solid var(--warn-border); }
    .info-banner strong, .alert-box strong { display:block; margin-bottom:4px; }
    .alert-box span { color: #9B7A30; }

    .list-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; margin-top: 8px; }
    @media (max-width: 760px) { .list-card-grid { grid-template-columns: 1fr; } }
    .mini-card {
      background: var(--soft); border: 1px solid var(--border); border-radius: 14px; padding: 16px;
    }
    .mini-card.dark { background: linear-gradient(135deg, rgba(13,15,26,.98), rgba(23,28,44,.96)); border-color: rgba(255,255,255,.06); color: #fff; }
    .mini-card h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); margin-bottom: 10px; }
    .mini-card.dark h4 { color: rgba(255,255,255,.65); }
    .mini-card p { font-size: 12.5px; color: #555; }
    .mini-card.dark p { color: rgba(255,255,255,.82); }

    .item-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
    .ghost-note { font-size: 12px; color: var(--muted); }
    .dynamic-list { display: flex; flex-direction: column; gap: 12px; }
    .dynamic-item {
      background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 16px;
    }
    .dynamic-item-head { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom: 12px; }
    .dynamic-item-head strong { font-size: 13px; }
    .remove-item {
      background: transparent; border: 1px solid var(--border); border-radius: 999px; padding: 6px 10px; font-size: 11px; font-weight: 700; cursor: pointer;
    }
    .remove-item:hover { border-color: #d66; color: #a33; }
    .empty-state {
      border: 1px dashed var(--border); border-radius: 14px; padding: 18px; color: var(--muted); background: var(--soft);
      font-size: 12px;
    }

    .actions { display:flex; justify-content:flex-end; gap: 10px; margin-top: 24px; flex-wrap: wrap; }
    .btn {
      padding: 11px 20px; border-radius: var(--radius-sm); border: none; font-family: inherit; font-size: 13px; font-weight: 700; cursor: pointer; transition: all .15s;
    }
    .btn-primary { background: linear-gradient(135deg, var(--hd-dark), #1a1d35); color: #fff; }
    .btn-primary:hover { background: var(--hd-cyan); color: var(--hd-dark); }
    .btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
    .btn-secondary:hover { border-color: var(--hd-blue); color: var(--hd-blue); }
    .btn-accent { background: linear-gradient(135deg, var(--hd-cyan), var(--hd-blue)); color: var(--hd-dark); }
    .btn-accent:hover { filter: brightness(.98); }

    .result-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
    @media (max-width: 980px) { .result-grid { grid-template-columns: 1fr; } }

    .result-box {
      background: var(--soft); border: 1px solid var(--border); border-radius: 14px; padding: 18px; margin-top: 14px;
    }
    .result-box-title { font-size: 12px; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
    .rtext, .result-box pre { font-size: 13px; color: #555; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
    .result-box pre { max-height: 420px; overflow: auto; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 12px; }
    .mini-list { padding-left: 18px; }
    .mini-list li { margin-bottom: 7px; color: #555; }
    .tag-row { display:flex; gap:8px; flex-wrap:wrap; }
    .tag { display:inline-flex; align-items:center; gap:8px; border-radius:999px; padding:8px 11px; font-size:11px; font-weight:700; border:1px solid var(--border); background:#fff; }
    .tag .dot { width:8px; height:8px; border-radius:50%; background:linear-gradient(90deg, var(--hd-cyan), var(--hd-blue)); }
    .metric-grid { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:12px; margin-top:14px; }
    @media (max-width: 640px) { .metric-grid { grid-template-columns: 1fr; } }
    .metric-card { background:#fff; border:1px solid var(--border); border-radius:12px; padding:14px; }
    .metric-card label { font-size:10px; text-transform:uppercase; letter-spacing:1px; color:var(--muted); display:block; margin-bottom:8px; }
    .metric-card strong { font-size:18px; }
    .page-map {
      display:grid; gap: 12px;
    }
    .page-output {
      background:#fff; border:1px solid var(--border); border-radius: 12px; padding: 14px;
    }
    .page-output h4 { font-size: 13px; margin-bottom: 10px; }
    .page-output .schema-tags { display:flex; gap:8px; flex-wrap:wrap; margin-bottom: 10px; }
    .page-output .schema-tags span { padding: 7px 9px; border-radius: 999px; font-size: 11px; background: var(--soft-cyan); border: 1px solid var(--border); }

    .footer-note { font-size: 12px; color: var(--muted); margin-top: 10px; }
    .hidden { display: none !important; }

    .json-block { display: flex; flex-direction: column; gap: 10px; }
    .json-actions { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
    .btn-copy {
      padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border);
      background: #fff; color: var(--text); font-family: inherit; font-size: 12px; font-weight: 700;
      cursor: pointer; transition: all .15s;
    }
    .btn-copy:hover { border-color: var(--hd-blue); color: var(--hd-blue); }
    .btn-copy.is-success { border-color: var(--hd-cyan); color: var(--hd-dark); background: rgba(0,229,200,0.12); }

    .page-json-list { display: flex; flex-direction: column; gap: 14px; }
    .page-json-card {
      background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px;
      box-shadow: var(--shadow);
    }
    .page-json-head {
      display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 10px; flex-wrap: wrap;
    }
    .page-json-title { font-size: 13px; font-weight: 800; color: var(--hd-dark); }
    .page-json-url { font-size: 11px; color: var(--muted); margin-top: 4px; }
    .page-json-actions { display: flex; gap: 8px; flex-wrap: wrap; }


  
.mini-progress-wrap{display:flex;flex-direction:column;gap:8px}
.mini-progress-track{width:100%;height:10px;background:rgba(255,255,255,.08);border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.06)}
.mini-progress-fill{height:100%;background:linear-gradient(90deg,var(--hd-cyan),var(--hd-blue),var(--hd-purple));border-radius:999px;transition:width .3s ease}
.score-subtext{font-size:.82rem;color:var(--hd-muted)}
/* ===== HDSSQ isolation layer ===== */
.hdssq-app,
.hdssq-app * {
  box-sizing: border-box;
}
.hdssq-app {
  position: fixed !important;
  inset: 0 !important;
  z-index: 99999 !important;
  display: grid !important;
  grid-template-columns: 280px minmax(0, 1fr) !important;
  width: 100vw !important;
  height: 100vh !important;
  overflow: hidden !important;
  background: #ffffff !important;
  color: #111111 !important;
  isolation: isolate !important;
  font-family: 'Montserrat', system-ui, sans-serif !important;
}
.hdssq-app .sidebar {
  display: flex !important;
  flex-direction: column !important;
  min-width: 280px !important;
  max-width: 280px !important;
  height: 100vh !important;
  overflow-y: auto !important;
  background: #0D0F1A !important;
  color: #ffffff !important;
  visibility: visible !important;
  opacity: 1 !important;
}
.hdssq-app .hdssq-main,
.hdssq-app .main {
  display: block !important;
  position: relative !important;
  min-width: 0 !important;
  width: auto !important;
  max-width: none !important;
  height: 100vh !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  padding: 40px 48px 90px !important;
  background: #ffffff !important;
  color: #111111 !important;
  visibility: visible !important;
  opacity: 1 !important;
  z-index: 1 !important;
}
.hdssq-app .topbar,
.hdssq-app #quizForm,
.hdssq-app .card,
.hdssq-app .result-box,
.hdssq-app .mini-card,
.hdssq-app .page-output,
.hdssq-app .field,
.hdssq-app .checks,
.hdssq-app .actions {
  visibility: visible !important;
  opacity: 1 !important;
}
.hdssq-app .section {
  display: none !important;
  visibility: visible !important;
  opacity: 1 !important;
}
.hdssq-app .section.active {
  display: block !important;
}
.hdssq-app h1,
.hdssq-app h2,
.hdssq-app h3,
.hdssq-app h4,
.hdssq-app h5,
.hdssq-app h6,
.hdssq-app p,
.hdssq-app label,
.hdssq-app small,
.hdssq-app li,
.hdssq-app span,
.hdssq-app div,
.hdssq-app strong {
  color: inherit;
}
.hdssq-app .topbar-left h1,
.hdssq-app .card-title,
.hdssq-app .page-output h4,
.hdssq-app .result-box-title,
.hdssq-app .metric-card strong {
  color: #111111 !important;
}
.hdssq-app .card-hint,
.hdssq-app .topbar-left p,
.hdssq-app .field label,
.hdssq-app .field small,
.hdssq-app .ghost-note,
.hdssq-app .footer-note,
.hdssq-app .rtext,
.hdssq-app .mini-list li,
.hdssq-app .page-json-url {
  color: #7A7A7A !important;
}
.hdssq-app input,
.hdssq-app textarea,
.hdssq-app select,
.hdssq-app button {
  font: inherit !important;
}
.hdssq-app input[type="text"],
.hdssq-app input[type="url"],
.hdssq-app input[type="number"],
.hdssq-app textarea,
.hdssq-app select {
  background: #ffffff !important;
  color: #111111 !important;
  border: 1px solid #E8E8E8 !important;
}
.hdssq-app pre {
  background: #ffffff !important;
  color: #111111 !important;
}
@media (max-width: 980px) {
  .hdssq-app {
    grid-template-columns: 1fr !important;
  }
  .hdssq-app .sidebar {
    display: none !important;
  }
  .hdssq-app .hdssq-main,
  .hdssq-app .main {
    height: 100vh !important;
  }
}


/* === HDSSQ Shadow DOM layout support === */
:host {
  all: initial;
  color-scheme: light;
}
.app, .app * {
  box-sizing: border-box;
}
.main {
  display: block;
  min-width: 0;
  width: auto;
  max-width: none;
  padding: 40px 48px 90px;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  overflow-y: auto;
}
.section { display: none; }
.section.active { display: block; }
@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .main { min-height: 100vh; }
}