*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:1.6;color:#1e293b;background:#f8fafc}
img,svg{max-width:100%;height:auto}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input{font-family:inherit;font-size:inherit}

.site-header{background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:100}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#0f172a;font-weight:700;font-size:18px}
.brand svg{color:#2563eb}
.site-nav{display:flex;gap:20px}
.site-nav a{color:#475569;text-decoration:none;font-size:14px;font-weight:500;padding:6px 0;border-bottom:2px solid transparent;transition:border-color .2s,color .2s}
.site-nav a:hover,.site-nav a:focus{color:#2563eb;border-bottom-color:#2563eb}

.checker-section{max-width:1200px;margin:0 auto;padding:40px 24px}
.checker-grid{display:grid;grid-template-columns:1fr 380px;gap:32px;align-items:start}

.viz-panel{background:#fff;border-radius:12px;border:1px solid #e2e8f0;padding:24px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.viz-header h1{font-size:24px;margin:0 0 4px;color:#0f172a}
.viz-sub{color:#64748b;margin:0 0 20px;font-size:14px}
.canvas-wrap{position:relative;background:#f8fafc;border-radius:8px;overflow:hidden;border:1px solid #e2e8f0}
#swing-canvas{width:100%;height:auto;display:block;aspect-ratio:1}
.clearance-status{position:absolute;top:12px;right:12px;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;pointer-events:none}
.clearance-status.ok{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.clearance-status.warn{background:#fef3c7;color:#92400e;border:1px solid #fde68a}
.clearance-status.bad{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}

.angle-control{margin-top:16px}
.angle-control label{display:block;font-size:14px;font-weight:500;color:#334155;margin-bottom:8px}
#angle-slider{width:100%;accent-color:#2563eb}
.angle-presets{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.angle-presets button{padding:4px 12px;border:1px solid #cbd5e1;border-radius:6px;background:#fff;font-size:12px;color:#475569;transition:all .15s}
.angle-presets button:hover{border-color:#2563eb;color:#2563eb}
.angle-presets button.active{background:#2563eb;color:#fff;border-color:#2563eb}

.controls-panel{display:flex;flex-direction:column;gap:16px}
.panel-card{background:#fff;border-radius:12px;border:1px solid #e2e8f0;padding:20px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.panel-card h2{font-size:16px;margin:0 0 14px;color:#0f172a;display:flex;align-items:center;gap:8px}
.optional{font-size:12px;color:#94a3b8;font-weight:400}
.field-row{margin-bottom:14px}
.field-row:last-child{margin-bottom:0}
.field-row label{display:block;font-size:13px;font-weight:500;color:#334155;margin-bottom:4px}
.field-row input[type="number"],.field-row input[type="text"]{width:100%;padding:8px 10px;border:1px solid #cbd5e1;border-radius:6px;background:#fff;font-size:14px;transition:border-color .15s}
.field-row input:focus{border-color:#2563eb;outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.field-help{font-size:12px;color:#94a3b8;margin:4px 0 0}

.chip-row{display:flex;gap:4px;flex-wrap:wrap;margin-top:6px}
.chip-row button{padding:4px 10px;border:1px solid #cbd5e1;border-radius:6px;background:#f1f5f9;font-size:12px;color:#475569;transition:all .15s}
.chip-row button:hover{border-color:#2563eb;color:#2563eb}
.chip-row button.active{background:#2563eb;color:#fff;border-color:#2563eb}

.toggle-group{display:flex;gap:0}
.toggle-btn{flex:1;padding:8px 12px;border:1px solid #cbd5e1;background:#fff;font-size:13px;color:#475569;transition:all .15s}
.toggle-btn:first-child{border-radius:6px 0 0 6px}
.toggle-btn:last-child{border-radius:0 6px 6px 0}
.toggle-btn.active{background:#2563eb;color:#fff;border-color:#2563eb}
.toggle-btn:not(.active):hover{background:#f1f5f9}

.obstacle-row{position:relative;padding:12px;border:1px solid #e2e8f0;border-radius:8px;margin-bottom:8px;background:#fafbfc}
.obstacle-fields{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.obstacle-fields label{font-size:12px;color:#64748b}
.obstacle-fields input{width:100%;padding:6px 8px;border:1px solid #cbd5e1;border-radius:4px;font-size:13px}
.remove-obs{position:absolute;top:4px;right:4px;width:24px;height:24px;border:none;background:transparent;color:#94a3b8;font-size:18px;line-height:1;border-radius:4px;display:flex;align-items:center;justify-content:center}
.remove-obs:hover{background:#fee2e2;color:#dc2626}

.btn-primary,.btn-secondary,.btn-ghost{padding:10px 16px;border-radius:8px;font-size:14px;font-weight:600;border:1px solid transparent;transition:all .15s;width:100%;margin-bottom:6px}
.btn-primary{background:#2563eb;color:#fff}
.btn-primary:hover{background:#1d4ed8}
.btn-secondary{background:#fff;color:#2563eb;border-color:#2563eb}
.btn-secondary:hover{background:#eff6ff}
.btn-ghost{background:transparent;color:#64748b;border-color:#cbd5e1}
.btn-ghost:hover{background:#f1f5f9}
.action-buttons{display:flex;flex-direction:column}
.action-message{margin-top:8px;font-size:13px;color:#166534;min-height:20px}

.saved-section{background:#fff;border-top:1px solid #e2e8f0}
.section-inner{max-width:1200px;margin:0 auto;padding:48px 24px}
.section-inner h2{font-size:22px;margin:0 0 8px;color:#0f172a}
.section-intro{color:#64748b;margin:0 0 24px;font-size:15px}
.saved-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.saved-card{border:1px solid #e2e8f0;border-radius:10px;padding:16px;background:#fafbfc;position:relative}
.saved-card h3{font-size:15px;margin:0 0 8px;color:#0f172a}
.saved-card p{font-size:13px;color:#64748b;margin:2px 0}
.saved-card .saved-actions{display:flex;gap:6px;margin-top:10px}
.saved-card .saved-actions button{padding:4px 10px;font-size:12px;border:1px solid #cbd5e1;border-radius:4px;background:#fff;color:#475569}
.saved-card .saved-actions button:hover{border-color:#2563eb;color:#2563eb}
.saved-card .delete-saved{position:absolute;top:8px;right:8px;width:24px;height:24px;border:none;background:transparent;color:#94a3b8;font-size:16px;border-radius:4px}
.saved-card .delete-saved:hover{background:#fee2e2;color:#dc2626}
.empty-state{grid-column:1/-1;text-align:center;padding:40px;color:#94a3b8}
.empty-state svg{margin-bottom:12px;color:#cbd5e1}

.tips-section{background:#f8fafc;border-top:1px solid #e2e8f0}
.tips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-top:8px}
.tip-card{background:#fff;border-radius:10px;border:1px solid #e2e8f0;padding:20px}
.tip-card h3{font-size:16px;margin:0 0 8px;color:#0f172a}
.tip-card p{font-size:14px;color:#475569;margin:0;line-height:1.6}

.faq-section{background:#fff;border-top:1px solid #e2e8f0}
.faq-list{margin:0}
.faq-list dt{font-weight:600;font-size:15px;color:#0f172a;margin:20px 0 4px}
.faq-list dt:first-child{margin-top:0}
.faq-list dd{margin:0;font-size:14px;color:#475569;line-height:1.6}

.scenario-section{background:#f0f9ff;border-top:1px solid #bae6fd}
.scenario-section p{font-size:15px;color:#334155;line-height:1.7;margin:0 0 12px}
.scenario-section p:last-child{margin-bottom:0}

.site-footer{background:#0f172a;color:#94a3b8;margin-top:0}
.footer-inner{max-width:1200px;margin:0 auto;padding:32px 24px;text-align:center}
.footer-inner p{margin:0 0 8px;font-size:13px}
.footer-nav{display:flex;justify-content:center;gap:20px;margin-top:8px}
.footer-nav a{color:#94a3b8;text-decoration:none;font-size:13px}
.footer-nav a:hover{color:#e2e8f0}
.version{font-size:12px;color:#475569;margin-top:12px}

@media(max-width:900px){
  .checker-grid{grid-template-columns:1fr}
  .controls-panel{order:2}
  .viz-panel{order:1}
  .header-inner{flex-wrap:wrap;height:auto;padding:12px 16px}
  .site-nav{flex-wrap:wrap;gap:12px;padding:8px 0}
  .site-nav a{font-size:13px}
  .brand{font-size:16px}
}
@media(max-width:600px){
  .angle-presets button{padding:4px 8px;font-size:11px}
  .obstacle-fields{grid-template-columns:1fr}
  .chip-row button{padding:3px 8px;font-size:11px}
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}