:root {
            --accent: #1a5fa8;
            --accent-dark: #124a86;
            --border: #cfd6de;
            --bg-soft: #f3f6f9;
            --text: #222;
            --muted: #666;
        }

        .calculator { max-width: 860px; margin: 0 auto; }
        h1 {
            margin: 0 0 18px 0;
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--accent);
            border-bottom: 2px solid var(--accent);
            padding-bottom: 8px;
        }
        h2 { font-size: 1.15rem; margin: 0 0 12px 0; color: var(--accent); }
        label { display: block; margin-bottom: 6px; font-weight: bold; font-size: 0.95rem; }

        /* Умови програми */
        table {  border-collapse: collapse; }
        .terms td, .terms th, .params td, .params th {
            border: 1px solid var(--border);
            padding: 9px 12px;
            text-align: left;
            vertical-align: top;
        }
        .terms td:first-child, .params td:first-child { width: 48%; background: var(--bg-soft); }
        .params th { background: var(--accent); color: #fff; font-weight: bold; }

        .form-block { margin: 25px 0 10px 0; }
        .field { margin-bottom: 22px; }

        .amount-value { font-size: 1.6rem; font-weight: bold; color: var(--accent); margin-bottom: 8px; }
        input[type=range] {
            width: 100%;
            -webkit-appearance: none;
            appearance: none;
            height: 6px;
            background: var(--border);
            border-radius: 3px;
            outline: none;
            padding: 0;
            border: none;
        }
        input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 22px; height: 22px;
            border-radius: 50%;
            background: var(--accent);
            cursor: pointer;
            border: 2px solid #fff;
            box-shadow: 0 0 0 1px var(--accent);
        }
        input[type=range]::-moz-range-thumb {
            width: 20px; height: 20px;
            border-radius: 50%;
            background: var(--accent);
            cursor: pointer;
            border: 2px solid #fff;
        }
        .range-labels { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--muted); margin-top: 6px; }

        .term-group { display: flex; flex-wrap: wrap; gap: 10px; }
        .term-group input { position: absolute; opacity: 0; pointer-events: none; }
        .term-group label {
            margin: 0;
            padding: 10px 22px;
            border: 1px solid var(--border);
            background: #fff;
            cursor: pointer;
            font-weight: normal;
            min-width: 80px;
            text-align: center;
        }
        .term-group input:checked + label { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: bold; }
        .term-group input:focus-visible + label { outline: 2px solid var(--accent-dark); outline-offset: 2px; }

        input[type=date] {
            padding: 10px 12px;
            border: 1px solid var(--border);
            font-size: 1rem;
            width: 220px;
            max-width: 100%;
        }
        input[type=date]:focus { border-color: var(--accent); outline: none; }

        .fixed-note { color: var(--muted); font-size: 0.9rem; }

        .result { margin-top: 30px; padding: 20px; background: var(--bg-soft); border: 1px solid var(--border); }
        .total { font-size: 2rem; font-weight: bold; color: var(--accent); text-align: center; margin: 10px 0 4px 0; }
        .total-desc { text-align: center; color: var(--muted); margin: 0 0 18px 0; }
        .params { background: #fff; }
        .value { font-weight: normal; }

        .section { margin-top: 20px; padding: 10px 14px; background: #fff; border: 1px solid var(--border); }
        .section-header { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: bold; padding: 6px 0; }
        .schedule-table { max-height: 420px; overflow: auto; margin-top: 10px; }
        #scheduleTable th, #scheduleTable td { padding: 8px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
        #scheduleTable th { color: var(--muted); font-weight: bold; }
        canvas { margin: 12px 0 6px 0; }
        .note { font-size: 0.85rem; color: var(--muted); margin-top: 20px; }

        @media (max-width: 600px) {
            body { padding: 12px; }
            .terms td:first-child, .params td:first-child { width: 45%; }
            .total { font-size: 1.6rem; }
        }