:root {
  --bg: #07111f;
  --panel: #0f1b2d;
  --panel-soft: #13233a;
  --line: #243750;
  --text: #edf4ff;
  --muted: #9fb0c7;
  --accent: #f4b400;
  --accent-soft: #ffd666;
  --good: #3ddc97;
  --warn: #ff8a65;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #0a1426 0%, #07111f 100%);
  color: var(--text);
}
.shell { width: min(1360px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 40px; }
.tutorial-shell { width: min(1120px, calc(100% - 32px)); }
.product-nav { border-bottom: 1px solid rgba(255,255,255,.08); background: rgba(7,17,31,.82); position: sticky; top: 0; backdrop-filter: blur(14px); z-index: 20; margin-bottom: 20px; }
.product-nav-inner { width: min(1360px, calc(100% - 32px)); margin: 0 auto; min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.product-logo { display: inline-flex; align-items: center; gap: 14px; color: var(--text); text-decoration: none; }
.product-logo-mark { width: 34px; height: 34px; display: block; filter: drop-shadow(0 10px 24px rgba(244,180,0,.18)); }
.product-logo-text { font-size: 22px; line-height: 1; font-weight: 700; letter-spacing: -0.02em; color: var(--text); }
.product-nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.product-nav-links a { color: var(--muted); text-decoration: none; }
.topbar { display: grid; grid-template-columns: 1.2fr .8fr; gap: 20px; margin-bottom: 20px; }
.topbar.single { grid-template-columns: 1fr; }
.product-topbar { align-items: stretch; }
.layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 20px; align-items: start; }
.panel, .topnote, .mini-card { background: rgba(15, 27, 45, .92); border: 1px solid rgba(255,255,255,.08); border-radius: 20px; box-shadow: 0 14px 40px rgba(0,0,0,.22); }
.panel { padding: 22px; }
.topnote { padding: 20px 22px; }
.panelless { padding: 6px 0; }
.eyebrow { margin: 0 0 8px; font-size: 12px; letter-spacing: .12em; color: var(--accent-soft); font-weight: 800; text-transform: uppercase; }
h1 { margin: 0 0 10px; font-size: 44px; line-height: 1.05; }
h2 { margin: 0 0 18px; font-size: 24px; }
.subtitle { margin: 0; color: var(--muted); max-width: 760px; }
.hero-points, .cta-row, .mini-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.hero-points span, .sub-badge, .report-tag {
  display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 999px; background: rgba(244,180,0,.12); color: var(--accent-soft); font-size: 12px; font-weight: 700;
}
.link-btn, .btn-primary {
  display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; padding: 12px 16px; text-decoration: none; font-weight: 700;
}
.link-btn { color: var(--text); border: 1px solid var(--line); }
.btn-primary { background: var(--accent); color: #111827; }
.mini-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 20px; }
.mini-card { padding: 16px 18px; }
.mini-card strong { display: block; margin-bottom: 6px; }
.mini-card p, .output-sub, .tutorial-card p, .tutorial-card li { color: var(--muted); line-height: 1.7; }
.topnote ul, .output ul, .output ol { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
label { display: grid; gap: 8px; margin-bottom: 14px; font-size: 14px; color: var(--text); }
input, select, textarea { width: 100%; border: 1px solid var(--line); border-radius: 12px; background: #0a1424; color: var(--text); padding: 12px 14px; font: inherit; }
textarea { resize: vertical; min-height: 100px; }
.grid { display: grid; gap: 14px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.fetch-row { display: flex; gap: 12px; align-items: center; margin: 4px 0 14px; flex-wrap: wrap; }
.helper, .tier-hint { font-size: 13px; color: var(--muted); }
.tier-hint { margin: -2px 0 14px; padding: 10px 12px; border-radius: 12px; background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.05); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
button { border: 0; border-radius: 12px; padding: 12px 18px; font: inherit; font-weight: 700; cursor: pointer; }
button.primary { background: var(--accent); color: #111827; }
button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.output-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 18px; }
.badge { display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 999px; background: rgba(61,220,151,.12); color: var(--good); font-size: 12px; font-weight: 700; }
.output { background: var(--panel-soft); border-radius: 16px; border: 1px solid rgba(255,255,255,.06); padding: 18px; min-height: 860px; white-space: normal; }
.output.empty { display: grid; place-items: center; text-align: center; }
.empty-state h3 { margin: 0 0 8px; }
.empty-state p { color: var(--muted); }
.output h3 { margin: 0 0 10px; font-size: 18px; }
.output h4 { margin: 16px 0 8px; font-size: 15px; color: var(--accent-soft); }
.output p, .output li { color: #d6e1f0; line-height: 1.7; }
.output .muted { color: var(--muted); }
.report-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.output .kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 16px 0; }
.output .kpi { padding: 14px; border-radius: 14px; background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.06); }
.output .kpi strong { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.output .kpi span { font-size: 22px; font-weight: 800; }
.output .block { margin-top: 16px; padding: 14px; border: 1px solid rgba(255,255,255,.06); border-radius: 14px; background: rgba(255,255,255,.02); }
.output .score-high { color: var(--good); }
.output .score-mid { color: var(--accent-soft); }
.output .score-low { color: var(--warn); }
.output .two-col { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.output .faq-item, .output .brief-item, .output .draft-item, .saved-projects .saved-item { padding: 12px; border-radius: 12px; background: rgba(255,255,255,.025); border: 1px solid rgba(255,255,255,.05); margin-top: 10px; }
.output .faq-item p, .output .brief-item p, .output .draft-item p { margin: 6px 0; }
.output table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14px; }
.output th, .output td { border: 1px solid rgba(255,255,255,.08); padding: 10px; text-align: left; vertical-align: top; }
.output th { color: var(--accent-soft); font-weight: 700; background: rgba(255,255,255,.03); }
.saved-projects { margin-top: 16px; display: grid; gap: 10px; }
.saved-projects h3 { margin: 8px 0 0; font-size: 16px; }
.saved-projects p { margin: 4px 0 0; color: var(--muted); }
.saved-projects .saved-item { cursor: pointer; }
.saved-projects .saved-item:hover { border-color: rgba(244,180,0,.4); }
.tutorial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.tutorial-card.span-2 { grid-column: span 2; }
.steps { display: grid; gap: 14px; }
.steps strong { display: block; margin-bottom: 6px; }
@media (max-width: 1040px) {
  .topbar, .layout, .grid.two, .output .kpis, .output .two-col, .mini-grid, .tutorial-grid { grid-template-columns: 1fr; }
  .tutorial-card.span-2 { grid-column: span 1; }
  h1 { font-size: 36px; }
  .report-head, .section-head, .output-head, .product-nav-inner { flex-direction: column; align-items: flex-start; }
}
@media print {
  body { background: #fff; color: #111; }
  .form-panel, .topnote, .mini-grid, .actions, #saved-projects, .hero-points, .tier-hint, .cta-row { display: none !important; }
  .layout, .topbar, .shell { display: block; width: 100%; margin: 0; padding: 0; }
  .panel, .output, .output .block { background: #fff; color: #111; box-shadow: none; border: 1px solid #ddd; }
  .output p, .output li, .output .muted, .output th, .output td { color: #222; }
}