:root{--excel-green:#19764e;--excel-ink:#17201b;--excel-muted:#68766d;--excel-line:#dce8e1;--excel-soft:#f4faf6;--excel-paper:#fffefa}*{box-sizing:border-box}body{margin:0;background:var(--excel-paper);color:var(--excel-ink);font-family:Manrope,"Gowun Dodum",sans-serif}.site-header{height:68px;border-bottom:1px solid var(--excel-line);background:rgba(255,254,250,.95);position:sticky;top:0;z-index:4}.header-inner,main>section{width:calc(100% - 40px);max-width:1080px;margin:auto}.header-inner{height:68px;display:flex;align-items:center;gap:24px}.brand{color:var(--excel-ink);font-weight:800;font-size:21px;text-decoration:none;letter-spacing:-1px}.brand span span{color:var(--excel-green)}.brand-mark{display:inline-grid;place-items:center;width:32px;height:32px;margin-right:8px;border-radius:10px;background:var(--excel-green);color:white;font-size:18px;letter-spacing:0}.back-link{margin-left:auto;color:var(--excel-green);font-size:13px;font-weight:800;text-decoration:none}.intro{padding:70px 0 34px;text-align:center}.eyebrow{margin:0 0 12px;color:var(--excel-green);font-size:11px;font-weight:800;letter-spacing:1.4px}.intro h1{margin:0;font-size:clamp(31px,5vw,52px);letter-spacing:-2.5px}.intro>p:not(.eyebrow){max-width:670px;margin:16px auto;color:var(--excel-muted);font-size:17px;line-height:1.75}.trust{display:flex;justify-content:center;align-items:center;gap:11px;margin-top:20px;color:#657268;font-size:13px}.trust i{width:3px;height:3px;border-radius:50%;background:#9dac9f}.excel-workspace{margin-bottom:70px;padding:30px;border:1px solid var(--excel-line);border-radius:24px;background:white;box-shadow:0 20px 45px rgba(33,68,47,.06)}.excel-upload{display:grid;place-items:center;min-height:190px;padding:28px;border:2px dashed #a9d7bd;border-radius:18px;background:var(--excel-soft);text-align:center;cursor:pointer}.excel-upload input{position:absolute;inline-size:1px;block-size:1px;opacity:0}.excel-upload strong{font-size:20px}.excel-upload small{display:block;margin-top:7px;color:var(--excel-muted)}.excel-upload .button{margin-top:18px}.selected-file{min-height:20px;margin:14px 0 0;color:var(--excel-green);font-size:13px;font-weight:800;word-break:break-all}.excel-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:22px 0}.excel-options label{display:grid;gap:7px;color:#425249;font-size:13px;font-weight:800}.excel-options input,.excel-options select{width:100%;min-height:44px;padding:10px 12px;border:1px solid #d4e2d9;border-radius:10px;background:#fff;color:var(--excel-ink);font:inherit}.excel-options .check{display:flex;align-items:center;gap:9px;padding:12px;border:1px solid #dce8e1;border-radius:10px;background:#fbfdfa}.excel-options .check input{width:17px;min-height:17px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 20px;border:1px solid #cde2d5;border-radius:12px;background:#fff;color:var(--excel-green);font:800 14px Manrope,"Gowun Dodum",sans-serif;cursor:pointer}.button.primary{border-color:var(--excel-green);background:var(--excel-green);color:#fff;box-shadow:0 10px 20px rgba(25,118,78,.16)}.button:disabled{opacity:.55;cursor:wait}.excel-action{display:flex;justify-content:flex-end;margin-top:22px}.excel-result{margin-top:22px;padding:20px;border:1px solid #bfe5cb;border-radius:14px;background:#f0faF3}.excel-result h2{margin:0 0 8px;font-size:18px}.excel-result p{margin:0 0 16px;color:var(--excel-muted);line-height:1.6}.guide{margin:0 auto 80px;padding-top:12px}.guide h2{font-size:27px;letter-spacing:-1px}.guide>p{color:var(--excel-muted);line-height:1.8}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:25px}.guide-grid article{padding:19px;border:1px solid var(--excel-line);border-radius:15px;background:#fff}.guide-grid h3{margin:0 0 8px;font-size:16px}.guide-grid p{margin:0;color:var(--excel-muted);font-size:14px;line-height:1.65}.related-tools{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}.related-tools a{padding:10px 13px;border:1px solid var(--excel-line);border-radius:10px;color:var(--excel-green);font-size:13px;font-weight:800;text-decoration:none}.tool-editorial{margin:0 auto 80px;padding:32px;border-top:1px solid var(--excel-line)}.tool-editorial h2{margin:28px 0 10px;font-size:23px}.tool-editorial p,.tool-editorial li{color:var(--excel-muted);line-height:1.8}.tool-editorial__faq details{border-top:1px solid var(--excel-line);padding:15px 0}.tool-editorial__faq summary{cursor:pointer;font-weight:800}.tool-editorial__links{display:flex;flex-wrap:wrap;gap:10px}.tool-editorial__links a{border:1px solid var(--excel-line);border-radius:10px;padding:11px 14px;color:var(--excel-green);font-weight:800;text-decoration:none}@media(max-width:680px){.site-header,.header-inner{height:58px}.header-inner,main>section{width:calc(100% - 28px)}.intro{padding:48px 0 26px}.intro h1{letter-spacing:-1.7px}.excel-workspace{padding:16px;border-radius:18px}.excel-options{grid-template-columns:1fr}.guide-grid{grid-template-columns:1fr}.trust{font-size:11px;gap:8px}.back-link{font-size:12px}.brand{font-size:18px}.brand-mark{width:28px;height:28px}.excel-action .button{width:100%}}