* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: linear-gradient(to bottom, #ffffff 0%, #f9fafb 100%);
            min-height: 100vh;
            color: #1f2937;
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            width: 100%;
        }

        header {
            padding: 2rem 0 1rem;
        }

        .site-name {
            font-size: 2rem;
            font-weight: 900;
            color: #000000;
            letter-spacing: -0.02em;
            text-decoration: none;
            display: inline-block;
        }

        .site-name:hover {
            opacity: 0.8;
        }

        .breadcrumb {
            margin-top: 0.75rem;
            font-size: 0.95rem;
            color: #6b7280;
        }

        .breadcrumb a {
            color: #6b7280;
            text-decoration: none;
        }

        .breadcrumb a:hover {
            color: #1f2937;
        }

        .breadcrumb span {
            margin: 0 0.5rem;
        }

        main {
            padding: 2rem 0 3rem;
        }

        .calculator-header {
            text-align: center;
            padding: 1.5rem 0 2rem;
        }

        .calculator-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: #000000;
            margin-bottom: 1rem;
        }

        .calculator-intro {
            font-size: 1.125rem;
            color: #6b7280;
            max-width: 720px;
            margin: 0 auto;
        }

        .layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 2rem;
            align-items: start;
        }

        .card {
            background: #ffffff;
            border: 1px solid #e5e7eb;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group.full {
            grid-column: 1 / -1;
        }

        label {
            display: block;
            font-weight: 700;
            color: #374151;
            margin-bottom: 0.5rem;
            font-size: 0.95rem;
        }

        input,
        select {
            width: 100%;
            min-height: 44px;
            padding: 0.875rem 1rem;
            border: 2px solid #d1d5db;
            border-radius: 8px;
            font: inherit;
            background: #ffffff;
        }

        input:focus,
        select:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .hint {
            color: #6b7280;
            font-size: 0.875rem;
            margin-top: 0.4rem;
        }

        .preset-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0.75rem;
            margin-bottom: 1.25rem;
        }

        .preset-btn,
        .calculate-btn,
        .clear-btn {
            min-height: 44px;
            border-radius: 8px;
            border: none;
            font: inherit;
            font-weight: 700;
            cursor: pointer;
        }

        .preset-btn {
            border: 2px solid #d1d5db;
            background: #ffffff;
            color: #374151;
            padding: 0.875rem 0.75rem;
        }

        .preset-btn:hover,
        .preset-btn.active {
            border-color: #2563eb;
            background: #eff6ff;
            color: #1d4ed8;
        }

        .actions {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 0.75rem;
            margin-top: 1rem;
        }

        .calculate-btn {
            background: #2563eb;
            color: #ffffff;
            padding: 1rem 1.25rem;
        }

        .calculate-btn:hover {
            background: #1d4ed8;
        }

        .clear-btn {
            background: #f3f4f6;
            color: #374151;
            padding: 1rem 1.25rem;
        }

        .error {
            display: none;
            background: #fef2f2;
            border: 1px solid #fecaca;
            color: #991b1b;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1rem;
            font-weight: 600;
        }

        .results {
            display: none;
        }

        .results.show {
            display: block;
        }

        .primary-result {
            background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
            color: #ffffff;
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1rem;
        }

        .primary-result .label {
            font-size: 0.875rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            opacity: 0.85;
        }

        .primary-result .value {
            font-size: 2.5rem;
            font-weight: 900;
            margin-top: 0.25rem;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
        }

        .metric {
            background: #f9fafb;
            border: 1px solid #e5e7eb;
            border-radius: 8px;
            padding: 1rem;
        }

        .metric .label {
            color: #6b7280;
            font-weight: 700;
            font-size: 0.85rem;
            margin-bottom: 0.35rem;
        }

        .metric .value {
            color: #111827;
            font-weight: 800;
            font-size: 1.25rem;
        }

        .content-section h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: #000000;
        }

        .content-section h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin: 1.5rem 0 0.5rem;
        }

        .content-section p {
            color: #4b5563;
            margin-bottom: 1rem;
        }

        .content-section ul {
            padding-left: 1.5rem;
            color: #4b5563;
            margin-bottom: 1rem;
        }

        .content-section li {
            margin-bottom: 0.5rem;
        }

        .content-section a {
            color: #2563eb;
            font-weight: 700;
            text-decoration: none;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 1rem;
        }

        th,
        td {
            padding: 0.75rem;
            border-bottom: 1px solid #e5e7eb;
            text-align: left;
        }

        th {
            background: #f9fafb;
            color: #374151;
            font-size: 0.875rem;
        }

        footer {
            padding: 2rem 0;
            text-align: center;
            border-top: 1px solid #e5e7eb;
            margin-top: 3rem;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem 1rem;
            font-size: 0.95rem;
        }

        .footer-links a {
            color: #6b7280;
            text-decoration: none;
        }

        .footer-links a:hover {
            color: #1f2937;
        }

        @media (max-width: 900px) {
            .layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }

            .calculator-title {
                font-size: 2rem;
            }

            .form-grid,
            .metric-grid,
            .preset-row,
            .actions {
                grid-template-columns: 1fr;
            }
        }
    

.form-group .input-wrap{display:flex;align-items:stretch}.form-group .input-wrap b,.form-group .input-wrap em{display:flex;align-items:center;padding:0 .75rem;background:#f3f4f6;border:1px solid #d1d5db;color:#4b5563;font-style:normal}.form-group .input-wrap b{border-right:0;border-radius:6px 0 0 6px}.form-group .input-wrap em{border-left:0;border-radius:0 6px 6px 0}.form-group .input-wrap input{border-radius:6px}.form-group .input-wrap b+input{border-radius:0 6px 6px 0}.form-group .input-wrap input:has(+em){border-radius:6px 0 0 6px}.formula-box{margin:1rem 0;padding:1rem 1.1rem;background:#eff6ff;border-left:4px solid #2563eb;border-radius:4px;color:#1e40af;font-weight:600}.result-note{margin-top:1rem;color:#6b7280;font-size:.9rem;line-height:1.5}.example-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:.75rem;margin:1rem 0}.example-item{padding:.8rem;background:#f9fafb;border:1px solid #e5e7eb;border-radius:6px}.example-item strong{display:block;color:#374151;margin-bottom:.2rem}.result-table{width:100%;border-collapse:collapse;margin:1rem 0}.result-table th,.result-table td{padding:.7rem;text-align:left;border-bottom:1px solid #e5e7eb}.faq-item{padding:.85rem 0;border-bottom:1px solid #e5e7eb}.faq-item:last-child{border-bottom:0}.faq-item h3{margin:0 0 .45rem;color:#1f2937}.tool-grid,.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin:1.25rem 0}.tool-card{display:block;padding:1rem;border:1px solid #e5e7eb;border-radius:8px;text-decoration:none;color:#1f2937;background:#fff}.tool-card:hover{border-color:#2563eb;background:#eff6ff}.tool-card strong{display:block;color:#1d4ed8;margin-bottom:.4rem}.tool-card span{color:#6b7280;font-size:.92rem;line-height:1.45}.responsible-note{font-size:.9rem;color:#6b7280;border-top:1px solid #e5e7eb;padding-top:1rem}.content-section h2:not(:first-child){margin-top:2rem}.content-section h3{margin-top:1.3rem}.content-section p,.content-section li{line-height:1.7}.section-kicker{color:#2563eb;font-weight:700;text-transform:uppercase;font-size:.78rem;letter-spacing:.06em;margin-bottom:.4rem}@media(max-width:700px){.example-grid{grid-template-columns:1fr}.tool-grid,.category-grid{grid-template-columns:1fr}}