:root {
  color-scheme: light;
  --bg: #f7f9fc; --text: #191c20; --muted: #43474e; --primary: #245f8c; --on-primary: #fff;
  --primary-container: #d0e5ff; --on-primary-container: #001d34; --secondary-container: #d6e4f7;
  --surface: #f0f3f8; --surface-high: #e5e8ee; --outline: #73777f; --line: #c3c7cf;
  --error: #a12b26; --error-bg: #ffdad6; --shadow: 0 18px 60px #001d3424;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-synthesis: none; text-rendering: optimizeLegibility;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { color-scheme: dark; --bg:#111418; --text:#e1e3e9; --muted:#c3c7cf; --primary:#a0cafa; --on-primary:#003355; --primary-container:#004a75; --on-primary-container:#d0e5ff; --secondary-container:#3a4858; --surface:#191c20; --surface-high:#272a2f; --outline:#8d9199; --line:#43474e; --error:#ffb4ab; --error-bg:#5e1814; --shadow:0 18px 60px #0007; }
}
:root[data-theme="dark"] { color-scheme: dark; --bg:#111418; --text:#e1e3e9; --muted:#c3c7cf; --primary:#a0cafa; --on-primary:#003355; --primary-container:#004a75; --on-primary-container:#d0e5ff; --secondary-container:#3a4858; --surface:#191c20; --surface-high:#272a2f; --outline:#8d9199; --line:#43474e; --error:#ffb4ab; --error-bg:#5e1814; --shadow:0 18px 60px #0007; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: 92px; }
body { margin: 0; background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.65; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .5; }
a { color: var(--primary); }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
h1,h2,h3,p { margin: 0; }
h1 { font-size: 23px; line-height: 1.3; letter-spacing: .015em; font-weight: 650; }
h2 { font-size: 18px; line-height: 1.5; font-weight: 650; }
h3 { font-size: 15px; font-weight: 600; }
.topbar { max-width: 1248px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 26px 24px 20px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { border-radius: 13px; }
.brand p { color: var(--muted); font-size: 12px; margin-top: 3px; letter-spacing: .07em; }
.header-actions,.toolbar-actions { display: flex; align-items: center; gap: 10px; }
.theme-switch { display: flex; border: 1px solid var(--outline); border-radius: 25px; overflow: hidden; }
.theme-switch button { background: transparent; color: var(--muted); border: 0; min-width: 64px; min-height: 42px; padding: 8px 17px; font-size: 13px; }
.theme-switch button[aria-pressed="true"] { background: var(--secondary-container); color: var(--text); font-weight: 650; }
.theme-switch button:focus-visible { outline-offset: -4px; border-radius: 22px; }
.button { min-height: 44px; padding: 10px 19px; border-radius: 24px; border: 1px solid transparent; background: transparent; color: var(--primary); font-weight: 600; font-size: 14px; line-height: 1.5; }
.button:hover { background: var(--secondary-container); }
.button.primary { color: var(--on-primary); background: var(--primary); }
.button.primary:hover { filter: brightness(.94); }
.button.tonal { background: var(--secondary-container); color: var(--text); }
.button.outlined { border-color: var(--outline); }
.page { max-width: 1248px; margin: 0 auto; padding: 6px 24px 22px; }
.page-toolbar { display:flex; justify-content:space-between; align-items:center; gap:14px; margin: 8px 0 24px; }
.eyebrow { color:var(--text); font-size:14px; font-weight:600; }
.page-toolbar p { color:var(--muted); font-size:13px; margin-top:2px; }
.planner-layout { display:grid; grid-template-columns: 1.05fr 1fr; gap:24px; align-items:start; }
.input-column,.result-column { display:flex; flex-direction:column; gap:18px; min-width:0; }
.card { background:var(--surface); border-radius:22px; padding:24px; min-width:0; }
.section-heading { display:flex; align-items:center; gap:12px; margin-bottom:24px; }
.section-heading p { color:var(--muted); font-size:12px; margin-top:2px; }
.section-number { display:grid; place-items:center; border-radius:11px; width:38px; height:38px; flex-shrink:0; font-size:13px; background:var(--secondary-container); font-variant-numeric:tabular-nums; }
.field-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:20px 14px; }
.field { min-width:0; }
.field.full { grid-column:1/-1; }
.field label { display:block; font-size:13px; color:var(--muted); margin-bottom:6px; line-height:1.5; }
.input-shell { display:flex; align-items:center; border:1px solid var(--outline); border-radius:13px; min-height:54px; padding-right:15px; }
.input-shell:focus-within { outline:2px solid var(--primary); outline-offset:-2px; border-color:var(--primary); }
.input-shell input { width:100%; min-width:0; background:transparent; border:0; outline:none; color:var(--text); padding:13px 15px; font-size:17px; line-height:1.5; border-radius:13px; font-variant-numeric:tabular-nums; }
.input-shell input:focus-visible { outline:none; }
.input-shell input::placeholder { color:var(--muted); opacity:.64; font-size:15px; }
.input-shell span { color:var(--muted); font-size:14px; }
.field:has([aria-invalid="true"]) .input-shell { border-color:var(--error); }
.field-error { color:var(--error); font-size:12px; margin-top:5px; overflow-wrap:anywhere; }
.hint { font-size:12px; color:var(--muted); margin-top:10px; }
.divider { height:1px; background:var(--line); opacity:.7; margin:22px 0 17px; }
.divider + h3 { margin-bottom:16px; }
.info-note { background:var(--secondary-container); border-radius:13px; padding:13px 15px; font-size:12px; color:var(--muted); line-height:1.8; }
.card > .info-note { margin-top:20px; }
.badge { margin-left:auto; border:1px solid var(--line); color:var(--muted); border-radius:20px; padding:3px 10px; font-size:11px; white-space:nowrap; }
.empty-state { text-align:center; padding:38px 8px 62px; color:var(--muted); }
.empty-number { font-size:56px; line-height:1.5; color:var(--outline); font-weight:300; }
.empty-state h3 { color:var(--text); font-size:18px; margin:8px 0 10px; }
.empty-state p { font-size:13px; line-height:1.9; }
.demand { background:var(--primary-container); color:var(--on-primary-container); border-radius:18px; padding:22px; }
.demand .success-label { font-size:13px; font-weight:600; margin-bottom:16px; }
.demand .demand-label { font-size:13px; }
.demand .demand-number { display:block; font-size:48px; font-weight:650; line-height:1.3; letter-spacing:-.025em; margin:2px 0; overflow-wrap:anywhere; font-variant-numeric:tabular-nums; }
.demand .unit { font-size:12px; }
.stats { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin:16px 0 22px; }
.stat { border-radius:13px; padding:13px 15px; background:var(--surface-high); min-width:0; }
.stat span { display:block; color:var(--muted); font-size:12px; }
.stat strong { font-size:23px; font-weight:600; display:block; margin-top:2px; overflow-wrap:anywhere; }
.stat small { font-size:13px; font-weight:500; }
.allocation-title { font-size:14px; font-weight:600; padding-bottom:4px; }
.allocation-list { padding:0; margin:0; list-style:none; }
.allocation-row { display:flex; justify-content:space-between; align-items:center; gap:18px; border-bottom:1px solid var(--line); padding:15px 0; }
.allocation-row:last-child { border:0; padding-bottom:4px; }
.allocation-row span { display:block; font-size:14px; }
.allocation-row small { display:block; font-size:12px; color:var(--muted); }
.allocation-row strong { font-size:17px; font-weight:600; text-align:right; overflow-wrap:anywhere; max-width:60%; }
.conflict { padding:20px; border-radius:16px; background:var(--error-bg); color:var(--error); }
.conflict h3 { font-size:17px; margin-bottom:9px; }
.conflict p { font-size:13px; overflow-wrap:anywhere; }
.result-actions { display:flex; flex-wrap:wrap; gap:10px; margin-top:24px; }
.calculation { border-top:1px solid var(--line); margin-top:22px; padding-top:20px; }
.calculation ol { margin:12px 0 0; padding-left:24px; font-size:13px; color:var(--muted); overflow-wrap:anywhere; }
.calculation li + li { margin-top:10px; }
.scope-note { color:var(--muted); font-size:12px; line-height:1.9; padding:0 6px; }
.footer { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-top:26px; padding-top:16px; border-top:1px solid var(--line); color:var(--muted); font-size:12px; }
.footer .button { font-size:12px; }
.update-banner .button { margin-top:10px; }
dialog { color:var(--text); background:var(--bg); border:1px solid var(--line); border-radius:26px; padding:26px; width:min(480px,calc(100% - 32px)); max-height:calc(100dvh - 48px); box-shadow:var(--shadow); }
dialog::backdrop { background:#10182080; }
dialog > p { font-size:14px; color:var(--muted); margin-top:14px; }
.dialog-heading { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:20px; }
.dialog-actions { display:flex; justify-content:flex-end; gap:10px; margin-top:26px; }
.switch-row { display:flex; gap:20px; justify-content:space-between; align-items:center; cursor:pointer; margin:16px 0 24px; }
.switch-row strong { display:block; font-size:15px; }
.switch-row small { display:block; color:var(--muted); font-size:12px; margin-top:5px; }
.switch-row input { appearance:none; flex-shrink:0; width:48px; height:29px; border:2px solid var(--outline); border-radius:20px; background:var(--surface-high); cursor:pointer; position:relative; }
.switch-row input::after { content:""; position:absolute; width:17px; height:17px; border-radius:50%; background:var(--outline); top:4px; left:4px; }
.switch-row input:checked { background:var(--primary); border-color:var(--primary); }
.switch-row input:checked::after { background:var(--on-primary); left:23px; }
dialog .info-note p { margin-top:8px; }
textarea { width:100%; resize:vertical; background:var(--surface); color:var(--text); border:1px solid var(--outline); border-radius:12px; padding:12px; margin-top:14px; font-size:14px; }
.toast { position:fixed; z-index:5; bottom:26px; left:50%; transform:translateX(-50%); max-width:calc(100vw - 32px); padding:13px 22px; border-radius:14px; background:var(--text); color:var(--bg); box-shadow:var(--shadow); font-size:14px; }
.visually-hidden { position:absolute; width:1px; height:1px; overflow:hidden; clip-path:inset(50%); white-space:nowrap; }
.skip-link { position:fixed; left:16px; top:-100px; z-index:10; background:var(--bg); padding:12px; }
.skip-link:focus { top:10px; }
.mobile-result-link { display:none; }
.noscript { position:fixed; inset:20px 20px auto; padding:24px; border:2px solid var(--error); background:var(--bg); z-index:20; }
@media (min-width: 900px) and (min-height: 850px) { .result-column { position:sticky; top:24px; } }
@media (max-width: 759px) {
  .topbar { padding:20px 18px 14px; gap:12px; }
  .brand { gap:9px; }
  .brand img { width:36px; height:36px; border-radius:11px; }
  h1 { font-size:20px; }
  .brand p { font-size:10px; }
  .header-actions { gap:6px; }
  .theme-switch button { min-width:44px; min-height:40px; padding:6px 10px; font-size:12px; }
  .header-actions .button { padding:9px 13px; font-size:12px; }
  .page { padding:8px 16px 90px; }
  .page-toolbar { margin:4px 2px 20px; }
  .page-toolbar p { font-size:11px; }
  .toolbar-actions { gap:1px; }
  .toolbar-actions .button { padding:8px 12px; font-size:12px; }
  .planner-layout { grid-template-columns:1fr; gap:18px; }
  .card { padding:20px; border-radius:20px; }
  .section-heading { margin-bottom:20px; }
  .section-heading h2 { font-size:17px; }
  .section-heading p { font-size:11px; }
  .field-grid { gap:18px 12px; }
  .field label { font-size:12px; }
  .mobile-result-link { position:fixed; bottom:0; left:0; right:0; display:flex; align-items:center; justify-content:space-between; padding:13px 24px calc(13px + env(safe-area-inset-bottom)); background:var(--secondary-container); color:var(--text); font-weight:600; font-size:14px; text-decoration:none; border-top:1px solid var(--line); z-index:3; }
  .mobile-result-link span { color:var(--muted); font-size:12px; font-weight:400; }
  .toast { bottom:calc(76px + env(safe-area-inset-bottom)); }
  .empty-state { padding:22px 4px 38px; }
}
@media (max-width: 360px) { .brand img { display:none; } .topbar { gap:8px; } .card { padding:17px; } .field-grid { grid-template-columns:1fr; } .page-toolbar { align-items:flex-start; } .toolbar-actions { flex-wrap:wrap; justify-content:flex-end; } .section-heading { gap:9px; } }
@media (prefers-reduced-motion: no-preference) { .button, .theme-switch button { transition:background-color .16s; } }
@media print { .header-actions, .page-toolbar, .input-column, .footer, .result-actions, .mobile-result-link, .update-banner { display:none !important; } .planner-layout { display:block; } .result-column { position:static; } .card { border:1px solid #888; } }