:root{--color-primary:#2563eb;--color-primary-dark:#1d4ed8;--color-primary-light:#dbeafe;--color-bg:#f8fafc;--color-surface:#fff;--color-text:#1e293b;--color-text-secondary:#64748b;--color-border:#e2e8f0;--color-accent:#f59e0b;--color-success:#10b981;--color-success-light:#d1fae5;--color-danger:#ef4444;--radius-sm:8px;--radius:12px;--radius-pill:999px;--shadow:0 1px 3px #00000014;--shadow-lg:0 4px 16px #0000001f;--max-width:960px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;font-size:16px}body{color:var(--color-text);background:var(--color-bg);min-height:100dvh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.7}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.container{max-width:var(--max-width);margin:0 auto;padding:0 16px}.site-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:100;padding:12px 0;position:sticky;top:0}.site-header .container{justify-content:space-between;align-items:center;gap:12px;display:flex}.site-header__title{color:var(--color-text);white-space:nowrap;font-size:1.1rem;font-weight:700}.site-header__title a{color:inherit}.site-header__title a:hover{text-decoration:none}.site-nav{flex-wrap:wrap;gap:2px;display:flex}.site-nav a{border-radius:var(--radius-sm);color:var(--color-text-secondary);white-space:nowrap;padding:6px 10px;font-size:.85rem;transition:background .15s,color .15s}.site-nav a:hover,.site-nav a.active{background:var(--color-primary-light);color:var(--color-primary);text-decoration:none}.site-footer{background:var(--color-surface);border-top:1px solid var(--color-border);text-align:center;color:var(--color-text-secondary);margin-top:48px;padding:24px 0;font-size:.85rem}.main{padding:32px 0}.page-title{border-left:4px solid var(--color-primary);margin-bottom:8px;padding-left:12px;font-size:1.75rem;font-weight:700}.page-description{color:var(--color-text-secondary);margin-bottom:24px;font-size:.95rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}.card+.card{margin-top:16px}.card__title{margin-bottom:16px;font-size:1.1rem;font-weight:600}.form-group{margin-bottom:16px}.form-group label{color:var(--color-text);margin-bottom:4px;font-size:.9rem;font-weight:500;display:block}.form-group__hint{color:var(--color-text-secondary);margin-top:2px;font-size:.8rem}.form-group--error input,.form-group--error select{border-color:var(--color-danger)}.form-group__error{color:var(--color-danger);margin-top:2px;font-size:.8rem}.form-row{flex-wrap:wrap;gap:12px;display:flex}.form-row .form-group{flex:1;min-width:140px}input[type=number],input[type=text],select{border:1px solid var(--color-border);border-radius:var(--radius-sm);width:100%;color:var(--color-text);background:var(--color-surface);padding:10px 12px;font-size:1rem;transition:border-color .15s}input[type=number]:focus,input[type=text]:focus,select:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light);outline:none}.btn{border-radius:var(--radius-pill);cursor:pointer;border:none;justify-content:center;align-items:center;gap:6px;padding:12px 24px;font-size:1rem;font-weight:600;transition:background .15s,transform .1s;display:inline-flex}.btn:active{transform:scale(.97)}.btn--primary{background:var(--color-primary);color:#fff}.btn--primary:hover{background:var(--color-primary-dark)}.btn--secondary{background:var(--color-border);color:var(--color-text)}.btn--secondary:hover{background:#cbd5e1}.btn--danger{background:var(--color-danger);color:#fff}.btn--sm{border-radius:var(--radius-sm);padding:6px 12px;font-size:.85rem}.result-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;display:grid}.result-item{background:var(--color-primary-light);border-radius:var(--radius);text-align:center;padding:16px}.result-item__label{color:var(--color-text-secondary);margin-bottom:4px;font-size:.8rem}.result-item__value{color:var(--color-primary-dark);font-size:1.6rem;font-weight:700}.result-item__sub{color:var(--color-text-secondary);margin-top:2px;font-size:.75rem}.result-item--highlight{background:var(--color-primary);color:#fff}.result-item--highlight .result-item__label,.result-item--highlight .result-item__sub{color:#fffc}.result-item--highlight .result-item__value{color:#fff;font-size:2rem}.tool-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;display:grid}.tool-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);align-items:flex-start;gap:16px;padding:24px;transition:box-shadow .15s,transform .15s;display:flex}.tool-card:hover{box-shadow:var(--shadow-lg);text-decoration:none;transform:translateY(-2px)}.tool-card__icon{background:var(--color-primary-light);border-radius:var(--radius-sm);flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;font-size:1.8rem;display:flex}.tool-card__body{flex:1}.tool-card__title{color:var(--color-text);margin-bottom:6px;font-size:1.05rem;font-weight:600}.tool-card__desc{color:var(--color-text-secondary);font-size:.9rem;line-height:1.6}.data-table{border-collapse:collapse;width:100%;font-size:.9rem}.data-table th,.data-table td{border-bottom:1px solid var(--color-border);text-align:left;padding:10px 12px}.data-table th{background:var(--color-bg);white-space:nowrap;font-weight:600}.data-table td.number{text-align:right;font-variant-numeric:tabular-nums}.data-table tr:hover td{background:var(--color-primary-light)}.data-table tr.rank-1 td{background:var(--color-success-light);font-weight:600}.data-table tr.rank-2 td,.data-table tr.rank-3 td{background:#f0fdf4}.mobile-card-list{display:none}.notice-box{background:var(--color-bg);border:1px solid var(--color-border);border-left:4px solid var(--color-accent);border-radius:var(--radius-sm);color:var(--color-text-secondary);margin-top:16px;padding:12px 16px;font-size:.8rem;line-height:1.7}.notice-box__label{color:var(--color-text);margin-bottom:4px;font-weight:600}@media (width<=640px){.site-header .container{flex-direction:column;align-items:flex-start;gap:8px}.site-nav{flex-wrap:wrap;gap:0;width:100%}.site-nav a{padding:8px 10px;font-size:.82rem}.result-grid{grid-template-columns:repeat(2,1fr)}.form-row{flex-direction:column}.form-row .form-group{min-width:unset}.page-title{font-size:1.4rem}.btn--primary{width:100%;padding:14px 20px;font-size:1rem}.card{padding:16px}.tool-grid{grid-template-columns:1fr;gap:12px}.tool-card{gap:12px;padding:16px}.tool-card__icon{width:40px;height:40px;font-size:1.4rem}.desktop-table{display:none}.mobile-card-list{flex-direction:column;gap:12px;display:flex}.mobile-card-item{background:var(--color-bg);border-radius:var(--radius-sm);padding:12px}.mobile-card-item__header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.mobile-card-item__name{font-size:.95rem;font-weight:600}.mobile-card-item__fields{grid-template-columns:1fr 1fr;gap:8px;display:grid}.mobile-card-item__field label{color:var(--color-text-secondary);margin-bottom:2px;font-size:.75rem;display:block}.mobile-card-item__costs{border-top:1px solid var(--color-border);gap:12px;margin-top:8px;padding-top:8px;font-size:.9rem;display:flex}.mobile-card-item__costs span{color:var(--color-primary-dark);font-weight:600}}@media (hover:hover){input[type=number]:focus,input[type=text]:focus,select:focus{box-shadow:0 0 0 3px var(--color-primary-light)}}@media (hover:none){input[type=number]:focus,input[type=text]:focus,select:focus{box-shadow:none}}