:root {
      --bg1:#f4f7fc;
      --bg2:#eef3fb;
      --card:rgba(255,255,255,.88);
      --card-strong:#ffffff;
      --text:#152238;
      --muted:#69778f;
      --line:#dbe4f1;
      --line-strong:#c8d4e7;
      --blue:#1456d8;
      --blue-deep:#103d9a;
      --blue-soft:rgba(20,86,216,.08);
      --cyan:rgba(11,178,212,.12);
      --green:#0c8d5a;
      --red:#c53f3f;
      --gold:#fbfcfe;
      --shadow:0 18px 50px rgba(19,46,96,.10);
      --radius-xl:30px;
      --radius-lg:22px;
      --radius-md:16px;
      --radius-sm:12px;
      --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
      --sans: Inter, Avenir Next, Avenir, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    }
    * { box-sizing:border-box; }
    html,body {
      margin:0; padding:0; min-height:100%;
      font-family:var(--sans); color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(20,86,216,.09), transparent 34%),
        radial-gradient(circle at top right, rgba(11,178,212,.08), transparent 28%),
        linear-gradient(180deg, var(--bg1) 0%, var(--bg2) 100%);
    }
    body.tool-page { padding:0; }

    .site-topbar {
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      max-width:1280px; margin:0 auto 14px; padding:14px 18px;
      border-radius:18px; background:rgba(255,255,255,.78); border:1px solid rgba(255,255,255,.86);
      backdrop-filter: blur(10px); box-shadow: 0 10px 28px rgba(19,46,96,.08);
    }
    .site-topbar__brand { display:flex; align-items:center; gap:12px; min-width:0; }
    .site-topbar__brand img { width:42px; height:42px; object-fit:contain; }
    .site-topbar__brand strong { display:block; font-size:14px; }
    .site-topbar__brand span { display:block; font-size:12px; color:var(--muted); }
    .site-topbar__links { display:flex; flex-wrap:wrap; gap:10px; justify-content:flex-end; }
    .site-topbar__links a {
      display:inline-flex; align-items:center; justify-content:center;
      padding:10px 12px; border-radius:999px; text-decoration:none; font-weight:800; font-size:12px;
      color:var(--text); background:rgba(255,255,255,.88); border:1px solid var(--line);
    }
    .site-topbar__links a.is-primary { color:#fff; background:linear-gradient(135deg, var(--blue), var(--blue-deep)); border-color:transparent; }
    body.is-embedded .site-topbar { display:none; }
    .shell { max-width: 1280px; margin: 0 auto; }
    .hero, .card, .footer {
      background: var(--card);
      border: 1px solid rgba(255,255,255,.86);
      backdrop-filter: blur(12px);
      box-shadow: var(--shadow);
    }
    .hero {
      border-radius: 34px;
      padding: 28px 30px;
      display:grid;
      grid-template-columns: 170px 1fr auto;
      gap: 24px;
      align-items:center;
      margin-bottom: 22px;
    }
    .brand-logo {
      width: 150px; height: 90px; object-fit: contain;
      filter: drop-shadow(0 10px 24px rgba(20,86,216,.16));
    }
    .eyebrow {
      display:inline-flex; align-items:center; gap:8px;
      padding: 8px 12px; border-radius: 999px;
      background: var(--blue-soft); color: var(--blue);
      font-weight: 800; font-size: 12px; letter-spacing: .05em; text-transform: uppercase;
      margin-bottom: 12px;
    }
    h1 {
      margin: 0 0 8px;
      font-size: 34px; line-height:1.04; letter-spacing:-.04em;
    }
    .hero p {
      margin:0; color: var(--muted); font-size:15px; max-width: 790px; line-height:1.55;
    }
    .hero-badge {
      min-width: 235px;
      border-radius: 24px;
      padding: 18px 18px 16px;
      background: linear-gradient(135deg, #143f97, #1456d8 58%, #1b74ff);
      color:#fff;
      box-shadow: inset 0 1px 0 rgba(255,255,255,.22), 0 18px 34px rgba(20,86,216,.24);
    }
    .hero-badge .label {
      display:block; font-size:11px; text-transform:uppercase; letter-spacing:.08em; opacity:.86; margin-bottom:6px;
    }
    .hero-badge .value {
      display:block; font-size:22px; font-weight: 900; margin-bottom: 10px;
    }
    .hero-badge .sub {
      font-size:12px; opacity:.92; line-height:1.45;
    }

    .layout {
      display:grid;
      grid-template-columns: 1.02fr .98fr;
      gap: 22px;
    }
    .card {
      border-radius: var(--radius-xl);
      padding: 24px;
    }
    .section-title {
      display:flex; align-items:flex-start; justify-content:space-between; gap: 14px;
      margin-bottom: 18px;
    }
    .section-title h2 {
      margin:0 0 6px; font-size: 20px; letter-spacing:-.03em;
    }
    .section-title small {
      color: var(--muted); font-size: 12px; line-height:1.5;
    }
    .pill {
      display:inline-flex; align-items:center; justify-content:center;
      padding: 9px 12px; border-radius: 999px;
      background: var(--blue-soft); color: var(--blue); font-size: 12px; font-weight: 800; white-space: nowrap;
    }
    .formula-box {
      border-radius: 22px;
      padding: 18px;
      background: linear-gradient(180deg, rgba(20,86,216,.05), rgba(20,86,216,.02));
      border: 1px solid rgba(20,86,216,.12);
      margin-bottom: 18px;
    }
    .formula-grid {
      display:grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 12px;
    }
    .formula-step {
      background: rgba(255,255,255,.88);
      border: 1px solid var(--line);
      border-radius: 18px;
      padding: 14px;
      min-height: 104px;
    }
    .formula-step .k {
      font-size: 11px; text-transform: uppercase; color: var(--muted); font-weight: 800; letter-spacing: .06em;
      display:block; margin-bottom: 8px;
    }
    .formula-step .v {
      font-family: var(--mono); font-size: 14px; line-height: 1.55;
    }
    .block {
      border:1px solid var(--line);
      background: rgba(255,255,255,.75);
      border-radius: 20px;
      padding: 18px;
      margin-bottom: 16px;
    }
    .block-header {
      display:flex; justify-content:space-between; align-items:center; gap: 12px;
      margin-bottom: 14px;
    }
    .block-header h3 {
      margin:0; font-size: 15px; letter-spacing:-.02em;
    }
    .block-header span {
      color: var(--muted); font-size: 11px; font-weight: 700;
    }
    .input-grid {
      display:grid;
      grid-template-columns: repeat(2, minmax(0,1fr));
      gap: 14px;
    }
    .input-grid.cols-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
    .input-grid.cols-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
    .field {
      display:flex; flex-direction:column; gap: 7px;
    }
    .field label {
      font-size:12px; font-weight: 800; color: var(--muted);
      letter-spacing:.02em;
    }
    .field input, .field select, .field textarea {
      width:100%; min-height: 50px;
      border:1px solid var(--line);
      border-radius: 15px;
      background: rgba(255,255,255,.92);
      color: var(--text);
      padding: 14px 15px;
      font-size: 15px;
      outline:none;
      transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus {
      border-color: rgba(20,86,216,.52);
      box-shadow: 0 0 0 4px rgba(20,86,216,.10);
      transform: translateY(-1px);
    }
    .hint {
      font-size: 11px; color: var(--muted); line-height: 1.45;
    }
    .source-note {
      display:flex; align-items:flex-start; gap: 10px;
      padding: 13px 14px;
      border-radius: 16px;
      background: linear-gradient(180deg, rgba(20,86,216,.05), rgba(20,86,216,.02));
      border:1px solid rgba(20,86,216,.10);
      color: var(--muted);
      font-size: 12px;
      line-height: 1.55;
      margin-top: 14px;
    }
    .source-note strong { color: var(--text); }
    .actions {
      display:flex; flex-wrap:wrap; gap: 12px;
      margin-top: 18px;
    }
    .btn {
      border:none; border-radius: 15px; padding: 14px 18px;
      font-size:14px; font-weight: 800; cursor:pointer;
      transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn.primary {
      color:#fff;
      background: linear-gradient(135deg, var(--blue), var(--blue-deep));
      box-shadow: 0 16px 30px rgba(20,86,216,.22);
    }
    .btn.secondary {
      color: var(--text); background:#fff; border:1px solid var(--line);
    }
    .btn.ghost {
      color: var(--muted); background: rgba(255,255,255,.55); border: 1px dashed var(--line-strong);
    }

    .results-grid {
      display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; margin-bottom: 16px;
    }
    .metric {
      border:1px solid var(--line);
      border-radius: 20px;
      background: rgba(255,255,255,.88);
      padding: 16px;
    }
    .metric .k {
      display:block; font-size: 11px; text-transform: uppercase; letter-spacing:.06em; color: var(--muted); margin-bottom: 8px; font-weight:800;
    }
    .metric .v {
      font-size: 29px; font-weight: 900; letter-spacing:-.04em;
    }
    .metric .s {
      margin-top: 8px; font-size: 12px; color: var(--muted); line-height: 1.45;
    }
    .metric.highlight {
      background: linear-gradient(135deg, rgba(20,86,216,.10), rgba(11,178,212,.08));
      border-color: rgba(20,86,216,.22);
    }
    .metric.positive .v { color: var(--green); }
    .metric.negative .v { color: var(--red); }
    .metric.neutral .v { color: var(--text); }

    .result-table {
      border:1px solid var(--line); border-radius: 20px; overflow:hidden; background: rgba(255,255,255,.88);
      margin-bottom: 16px;
    }
    table { width:100%; border-collapse:collapse; }
    th, td {
      padding: 14px 16px;
      border-bottom: 1px solid #e8eef7;
      text-align:left;
      font-size: 14px;
      vertical-align: top;
    }
    th {
      background: #f7faff; color: var(--muted); text-transform: uppercase; font-size:11px; letter-spacing:.06em;
    }
    td:last-child, th:last-child { text-align:right; }
    tr:last-child td { border-bottom:none; }

    .explain {
      border:1px solid rgba(20,86,216,.10);
      border-radius: 20px;
      background: linear-gradient(180deg, rgba(20,86,216,.04), rgba(20,86,216,.015));
      padding: 18px;
      font-size: 13px;
      line-height: 1.75;
    }
    .explain strong { color: var(--text); }
    .history-list {
      display:grid; gap: 10px;
    }
    .history-item {
      border:1px solid var(--line);
      border-radius: 16px;
      background: rgba(255,255,255,.80);
      padding: 14px 16px;
      display:flex; justify-content:space-between; align-items:flex-start; gap: 12px;
    }
    .history-item strong { display:block; margin-bottom:4px; }
    .history-item small { color: var(--muted); display:block; line-height:1.5; }
    .history-actions {
      display:flex; gap:8px; flex-wrap:wrap;
    }
    .mini-btn {
      border:1px solid var(--line);
      background:#fff;
      color: var(--text);
      border-radius: 10px;
      padding: 8px 10px;
      font-size: 12px;
      font-weight: 800;
      cursor:pointer;
    }
    .status {
      margin-top: 18px;
      border-radius: 14px;
      padding: 12px 14px;
      font-size: 13px;
      font-weight: 700;
      display:none;
    }
    .status.show { display:block; }
    .status.ok {
      background: rgba(12,141,90,.08);
      color: #0a7148;
      border:1px solid rgba(12,141,90,.14);
    }
    .status.warn {
      background: rgba(197,63,63,.07);
      color: #9f3131;
      border:1px solid rgba(197,63,63,.14);
    }


    .tool-footer {
      max-width:1280px; margin:18px auto 0; padding:18px 22px;
      border-radius:22px; background:rgba(255,255,255,.82); border:1px solid rgba(255,255,255,.86);
      backdrop-filter: blur(10px); box-shadow: 0 10px 28px rgba(19,46,96,.08);
      display:flex; align-items:center; justify-content:space-between; gap:18px; color:var(--muted); font-size:13px;
    }
    .tool-footer__links { display:flex; flex-wrap:wrap; gap:12px; }
    .tool-footer__links a { color:var(--text); font-weight:700; text-decoration:none; }
    .tool-footer__links a:hover { color:var(--blue-deep); }

    .footer {
      margin-top: 22px;
      border-radius: 26px;
      padding: 18px 20px;
      display:flex; justify-content:space-between; align-items:center; gap: 16px; flex-wrap:wrap;
    }
    .footer-left {
      display:flex; align-items:center; gap: 14px;
    }
    .footer-logo {
      width: 92px; height: 50px; object-fit: contain;
    }
    .footer small {
      color: var(--muted); line-height: 1.55;
    }

    @media (max-width: 1080px) {
      .hero { grid-template-columns: 1fr; }
      .layout { grid-template-columns: 1fr; }
    }
    @media (max-width: 760px) {
      body { padding: 14px; }
      .hero, .card, .footer { border-radius: 24px; }
      .formula-grid, .input-grid, .input-grid.cols-3, .input-grid.cols-4, .results-grid {
        grid-template-columns: 1fr;
      }
      .actions { flex-direction: column; }
      .btn { width: 100%; }
      .footer-left { width: 100%; }
      .hero-badge { min-width: 0; }
    }
    @media print {
      body { background:#fff; padding:0; }
      .hero, .card, .footer {
        box-shadow:none !important; backdrop-filter:none !important; background:#fff !important; border:1px solid #d6ddea !important;
      }
      .actions, #historyCard, .status { display:none !important; }
      .shell { max-width:none; }
    }

    @media (max-width: 900px) {
      .site-topbar { flex-direction:column; align-items:flex-start; }
      .site-topbar__links { width:100%; justify-content:flex-start; }
    }
body.tool-page .site-topbar, body.tool-page .tool-footer { display:none !important; }
.tool-shell-embed { max-width:1280px; margin:0 auto; }
.tool-page .shell { max-width:none; }
.tool-page .hero { margin-top:0; }

:root{--sans:"Avenir Next",Avenir,"Segoe UI",Helvetica,Arial,sans-serif}
.tool-page .hero,.tool-page .card,.tool-page .footer{background:rgba(255,255,255,.92)}
.tool-page .hero p,.tool-page .hint,.tool-page .source-note{color:#5d6d84}
.tool-page .hero h1,.tool-page .section-title h2{letter-spacing:-.03em}