:root{--bg: #f5f7fb;--surface: #ffffff;--border: #e4e8f0;--text: #1a2233;--text-muted: #6b7688;--primary: #2563eb;--primary-dark: #1d4ed8;--primary-soft: #dbeafe;--accent: #10b981;--danger: #ef4444;--shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 1px 2px rgba(16, 24, 40, .04);--shadow-lg: 0 10px 30px rgba(16, 24, 40, .12);--radius: 14px;--max-width: 960px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Apple SD Gothic Neo,Malgun Gothic,맑은 고딕,Roboto,Noto Sans KR,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}.container{max-width:var(--max-width);margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}.site-header .inner{display:flex;align-items:center;gap:12px;height:60px}.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em}.logo .logo-badge{width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:16px}.breadcrumb{font-size:13px;color:var(--text-muted);margin:20px 0 8px;display:flex;gap:6px;flex-wrap:wrap}.breadcrumb a:hover{color:var(--primary)}.hero{padding:36px 0 8px}.hero h1{font-size:30px;margin:0 0 8px;letter-spacing:-.03em}.hero p{color:var(--text-muted);margin:0;font-size:15px}.section{margin:28px 0}.section-title{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:700;margin:0 0 14px}.section-title .emoji{font-size:20px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease;display:block}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-soft)}.card .card-emoji{font-size:26px;display:block;margin-bottom:10px}.card .card-title{font-weight:700;font-size:16px;margin-bottom:4px}.card .card-desc{color:var(--text-muted);font-size:13px;line-height:1.5}.card .card-count{margin-top:10px;font-size:12px;color:var(--primary);font-weight:600}.calc-layout{display:grid;grid-template-columns:1fr;gap:20px;margin-bottom:40px}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.panel h2{margin:0 0 4px;font-size:20px;letter-spacing:-.02em}.panel .panel-desc{color:var(--text-muted);font-size:14px;margin:0 0 18px}.field{margin-bottom:16px}.field label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}.field .input-wrap{position:relative;display:flex;align-items:center}.field input,.field select{width:100%;padding:12px 14px;font-size:15px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text);outline:none;transition:border-color .12s ease,box-shadow .12s ease}.field input:focus,.field select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft)}.field .unit{position:absolute;right:14px;color:var(--text-muted);font-size:14px;pointer-events:none}.field .hint{font-size:12px;color:var(--text-muted);margin-top:5px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:10px;padding:13px 20px;font-size:15px;font-weight:700;transition:background .12s ease,opacity .12s ease}.btn-primary{background:var(--primary);color:#fff;width:100%}.btn-primary:hover{background:var(--primary-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{background:var(--primary-soft);color:var(--primary-dark)}.btn-ghost:hover{background:#c9ddfd}.btn-excel{background:var(--accent);color:#fff}.btn-excel:hover{background:#059669}.form-error{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;font-size:13px;padding:10px 12px;border-radius:8px;margin-bottom:14px}.result{margin-top:6px}.result-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}.result-head h3{margin:0;font-size:17px}.result-highlight{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border-radius:12px;padding:20px;margin-bottom:16px}.result-highlight .label{font-size:13px;opacity:.85}.result-highlight .value{font-size:28px;font-weight:800;letter-spacing:-.02em;margin-top:4px}.result-rows{border:1px solid var(--border);border-radius:12px;overflow:hidden}.result-row{display:flex;justify-content:space-between;gap:12px;padding:12px 16px;font-size:14px;border-bottom:1px solid var(--border)}.result-row:last-child{border-bottom:none}.result-row .r-label{color:var(--text-muted)}.result-row .r-value{font-weight:700;text-align:right}.table-scroll{overflow:auto;max-height:340px;margin-top:16px;border:1px solid var(--border);border-radius:12px}table.data{width:100%;border-collapse:collapse;font-size:13px;min-width:420px}table.data th,table.data td{padding:9px 12px;text-align:right;border-bottom:1px solid var(--border);white-space:nowrap}table.data th{background:#f8fafc;font-weight:600;color:var(--text-muted);position:sticky;top:0}table.data td:first-child,table.data th:first-child{text-align:left}.result-note{font-size:12px;color:var(--text-muted);margin-top:12px;line-height:1.5}.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.result-actions .btn{flex:1;min-width:140px}.ad-slot{background:repeating-linear-gradient(45deg,#f1f5f9,#f1f5f9 12px,#eef2f7 12px,#eef2f7 24px);border:1px dashed #cbd5e1;border-radius:12px;display:grid;place-items:center;color:#94a3b8;font-size:13px;text-align:center;padding:20px}.ad-slot .ad-label{font-weight:600;letter-spacing:.04em}.ad-inline{margin:22px 0;min-height:100px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a8c;display:grid;place-items:center;z-index:100;padding:16px;animation:fade .15s ease}@keyframes fade{0%{opacity:0}to{opacity:1}}.modal{background:var(--surface);border-radius:16px;width:100%;max-width:460px;padding:24px;box-shadow:var(--shadow-lg)}.modal h3{margin:0 0 4px;font-size:18px}.modal .modal-sub{color:var(--text-muted);font-size:13px;margin:0 0 16px}.modal .ad-slot{min-height:200px}.countdown{display:flex;align-items:center;gap:10px;justify-content:center;margin:16px 0 4px;font-size:14px;color:var(--text-muted)}.countdown .num{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);font-weight:800}.progress{height:6px;background:var(--border);border-radius:99px;overflow:hidden;margin:14px 0}.progress>span{display:block;height:100%;background:var(--primary);transition:width .25s linear}.site-footer{border-top:1px solid var(--border);background:var(--surface);margin-top:40px;padding:28px 0;color:var(--text-muted);font-size:13px}.site-footer .foot-links{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:8px}.site-footer .foot-links a:hover{color:var(--primary)}@media (min-width: 720px){.calc-layout{grid-template-columns:1.2fr 1fr;align-items:start}.hero h1{font-size:34px}}