:root{--bg:#f0f0ec;--surface:#ffffff;--surface2:#f5f4f0;--surface3:#eceae4;--border:#dddbd3;--border2:#c4c2b8;--text:#1a1a16;--text2:#585850;--text3:#989888;--accent:#1a5a9a;--accent-light:#eaf0fb;--green:#1a6e3c;--green-light:#e8f5ee;--amber:#b45309;--amber-light:#fef3e2;--bonus:#7c3aed;--bonus-light:#f3eeff;--mono:'DM Mono',monospace;--radius:8px;--radius-lg:14px;}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}.container__inner{display:flex;justify-content:space-between;gap:1em;max-width:var(--tantive-container-width-pc);margin:50px auto;}.tool-area{flex-grow:1;}h1{font-size:1.5em;margin-bottom:20px;}h2{position:relative;font-size:1.5em;padding:.25em .5em;width:-moz-fit-content;width:fit-content;}h2::before{content:"";position:absolute;top:0;left:0;width:5px;height:100%;border-radius:3px;background-color:var(--tantive-main-dark-color);}.title-section{margin-bottom:50px;}.title-wrap{position:relative;width:-moz-fit-content;width:fit-content;}.title-catch{font-size:.75em;}.card{background:white;border:1px solid var(--tantive-main-dark-color);border-radius:5px;padding:1.5em;margin-bottom:1em;box-shadow:var(--shadow);}.card-head{font-size:11px;font-weight:700;letter-spacing:.07em;color:var(--gray-600);text-transform:uppercase;padding:9px 14px 7px;background:var(--gray-100);border-bottom:1px solid var(--gray-300);}.card-title{font-size:.75em;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:1em;}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px;}.field{display:flex;flex-direction:column;gap:5px;}.field-label{font-size:12px;font-weight:500;color:var(--text2);}.input-wrap{position:relative;}.input-wrap .unit{position:absolute;right:11px;top:50%;transform:translateY(-50%);font-size:12px;color:var(--text3);pointer-events:none;}.field input[type=number]{width:100%;padding:10px 40px 10px 12px;border:1.5px solid var(--border);border-radius:var(--radius);font-family:var(--mono);font-size:15px;color:var(--text);background:var(--surface);outline:none;transition:border-color .15s;-webkit-appearance:textfield;appearance:textfield;-moz-appearance:textfield;}.field input[type=number]::-webkit-inner-spin-button,.field input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;}.field input[type=number]:focus{border-color:var(--tantive-main-dark-color);}.period-row{display:flex;gap:8px;align-items:stretch;}.period-row input{flex:1;}.period-unit-toggle{display:flex;border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden;}.period-unit-btn{padding:0 12px;border:none;background:var(--surface);font-family:inherit;font-size:12px;font-weight:500;color:var(--text2);cursor:pointer;transition:all .15s;white-space:nowrap;}.period-unit-btn + .period-unit-btn{border-left:1px solid var(--border);}.period-unit-btn.active{background:var(--tantive-body-background-color);font-weight:700;}.toggle-row{display:flex;gap:4px;}.tog-btn{flex:1;padding:8px 6px;border:1.5px solid var(--border);border-radius:var(--radius);background:var(--surface);font-family:inherit;font-size:12px;font-weight:500;color:var(--text2);cursor:pointer;transition:all .15s;text-align:center;}.tog-btn.active{border-color:var(--tantive-main-dark-color);background:var(--tantive-body-background-color);font-weight:700;}.tog-btn:hover:not(.active){background:var(--surface2);}.bonus-fields{display:none;margin-top:14px;padding-top:14px;border-top:1px solid var(--border);}.bonus-fields.show{display:block;}.bonus-grid{display:grid;grid-template-columns:auto auto auto;gap:10px;justify-content:left;}.month-select{width:100%;padding:9px 28px 9px 12px;border:1.5px solid var(--border);border-radius:var(--radius);font-family:inherit;font-size:13px;color:var(--text);background:var(--surface);outline:none;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23989888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;transition:border-color .15s;}.month-select:focus{border-color:var(--accent);}.btn-calc-wrap{margin-bottom:.5rem;text-align:center;}.btn-calc{width:100%;padding:13px;border:none;border-radius:var(--radius);background:var(--tantive-main-dark-color);color:#fff;font-family:inherit;font-size:15px;font-weight:700;cursor:pointer;transition:all .15s;letter-spacing:.02em;}.btn-calc:hover{filter:brightness(.9);}.btn-calc:active{transform:scale(.99);}.notice-result-area{display:none;}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:10px;}.summary-item{background:var(--surface2);border:1px solid var(--border);border-radius:var(--radius);padding:14px;}.summary-label{font-size:11px;color:var(--text3);margin-bottom:4px;}.summary-value{font-family:var(--mono);font-size:18px;font-weight:500;color:var(--text);line-height:1.2;}.summary-value.accent{color:var(--accent);font-size:22px;}.summary-value.red{color:var(--amber);}.summary-sub{font-size:11px;color:var(--text3);margin-top:3px;}.method-badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:700;margin-bottom:12px;}.method-badge.equal-installment{background:var(--accent-light);color:var(--accent);}.method-badge.equal-principal{background:var(--green-light);color:var(--green);}.schedule-toggle{display:flex;justify-content:space-between;align-items:center;padding:10px 0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;}.schedule-toggle-label{font-size:13px;font-weight:700;color:var(--text);}.schedule-toggle-arrow{font-size:11px;color:var(--text3);transition:transform .2s;}.schedule-toggle-arrow.open{transform:rotate(180deg);}.schedule-wrap{display:none;overflow-x:auto;}.schedule-wrap.open{display:block;}.schedule-table{width:100%;border-collapse:collapse;font-size:12px;min-width:520px;}.schedule-table th{background:var(--surface2);padding:8px 10px;text-align:right;font-weight:500;color:var(--text2);border-bottom:1px solid var(--border);white-space:nowrap;}.schedule-table th:first-child{text-align:left;}.schedule-table td{padding:7px 10px;border-bottom:1px solid var(--border);text-align:right;font-family:var(--mono);font-size:12px;white-space:nowrap;}.schedule-table td:first-child{text-align:left;font-family:inherit;font-size:12px;color:var(--text2);}.schedule-table tr.year-row td{background:var(--surface2);font-weight:700;font-family:inherit;color:var(--text);}.schedule-table tr.bonus-row td{background:var(--bonus-light);}.schedule-table tr.bonus-row td:first-child{color:var(--bonus);font-weight:500;}.schedule-omit-row td{text-align:center;color:var(--text3);padding:10px;font-family:inherit;background:var(--surface2);cursor:pointer;}.schedule-omit-row td:hover{background:var(--surface3);color:var(--accent);}.disclaimer{font-size:.75rem;color:red;}.usecase-section{margin-top:1.5em;}.usecase-section li::before{content:"- ";}.related-tools-section{margin-top:1.5em;}.related-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1em;list-style:none;padding:0;margin:1em 0 0 0;}.related-tools-link{display:flex;height:100%;flex-direction:column;align-items:center;gap:8px;padding:1em;border:1px solid var(--tantive-main-dark-color);border-radius:8px;text-decoration:none;color:inherit;transition:box-shadow .2s,transform .2s;}.related-tools-link:hover{box-shadow:0 4px 12px rgba(0,0,0,.1);transform:translateY(-2px);}.related-tools-emoji{font-size:2rem;}.related-tools-name{font-weight:bold;font-size:1rem;}.related-tools-desc{font-size:.8rem;color:#888;text-align:center;}.ad-area{flex:0 0 200px;}.ad-area-wrap{width:400px;position:sticky;top:100px;}.ad-area-wrap ins{width:300px;height:250px;}@media screen and (max-width:1280px){.container__inner{flex-direction:column-reverse;padding:0 1em}.card{padding-inline:.5rem}.button-toggle-wrap{border-radius:var(--radius);display:flex;flex-direction:column;gap:.25rem}.button-toggle{border-radius:var(--radius)}.notice-result-area{display:block}.ad-area{flex:unset}.ad-area-wrap{margin:auto;width:100%}.ad-area-wrap ins{width:300px;height:100px;margin:auto}.ad-moved-area:has(>*){margin-top:1em;margin-bottom:1em}}