.tool-back{display:inline-block;color:inherit;margin-bottom:18px}
    .calculator-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.85fr);gap:16px;align-items:start}
    .input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;min-width:0;flex-direction:column;gap:7px;color:var(--navy);font-size:14px;font-weight:700}
    .field small{color:var(--muted);font-size:12px;font-weight:400;line-height:1.55}
    .field input,.field select,.field textarea{width:100%;min-width:0;border:1px solid #d4dbe4;border-radius:12px;background:#fff;color:inherit;padding:12px;font:inherit}
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#6d87a3;outline:0;box-shadow:0 0 0 4px rgba(49,95,141,.12)}
    .wide{grid-column:1/-1}
    .form-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}.form-actions .primary-btn{flex:1}
    .result-panel{border:1px solid #dbe2e9;border-radius:20px;background:linear-gradient(145deg,#f8fbff,#fff);padding:22px}
    .result-panel h2{margin:0;color:var(--navy);font-size:22px}.result-panel>p{margin:6px 0 16px;color:var(--muted);font-size:13px}
    .main-result{border-radius:16px;background:var(--navy);color:#fff;padding:20px}.main-result small{display:block;color:#dce6ef}.main-result strong{display:block;margin-top:4px;font-size:32px;line-height:1.25;overflow-wrap:anywhere}
    .main-result.warning{background:#7b2f2f}.main-result.success{background:#315f4b}
    .result-list{display:grid;gap:9px;margin:12px 0 0}.result-item{display:flex;justify-content:space-between;gap:14px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:12px 13px}
    .result-item dt{color:var(--muted);font-size:13px}.result-item dd{margin:0;color:var(--navy);font-weight:700;text-align:right;overflow-wrap:anywhere}
    .result-placeholder{display:flex;min-height:250px;align-items:center;justify-content:center;border:2px dashed #d6dee7;border-radius:17px;color:var(--muted);padding:22px;text-align:center}
    .formula{font-weight:700;color:var(--navy)}
    .steps{margin:8px 0 0;padding-left:22px;color:#3f4854}
    .notice{border-left:4px solid #6d87a3;background:#f4f8fc;padding:12px 14px;color:#344456;font-size:14px;line-height:1.65}
    .row-list{display:grid;gap:10px}.dynamic-row{display:grid;grid-template-columns:minmax(120px,1fr) minmax(110px,.7fr) minmax(110px,.7fr) auto;gap:10px;align-items:end;border:1px solid var(--line);border-radius:14px;background:#fafbfd;padding:11px}
    .remove-row{border:1px solid #d4dbe4;border-radius:11px;background:#fff;color:#7a3030;padding:11px;font:inherit;font-weight:700;cursor:pointer}
    .output-box{width:100%;min-height:120px;border:1px solid #d4dbe4;border-radius:12px;background:#fff;padding:12px;font:inherit;resize:vertical}
    @media(max-width:840px){.calculator-grid{grid-template-columns:1fr}}
    @media(max-width:600px){.input-grid{grid-template-columns:1fr}.wide{grid-column:auto}.form-actions{flex-direction:column}.result-panel{padding:17px}.result-item{flex-direction:column}.result-item dd{text-align:left}.dynamic-row{grid-template-columns:1fr}}

.color-preview{height:150px;border:1px solid var(--line);border-radius:16px;background:#fff}
.mode-fields[hidden]{display:none}