:root{color-scheme:light;--ink: #15213a;--muted: #5f6b80;--blue: #1b63d9;--blue-dark: #124da9;--sky: #eef5ff;--line: #dce4ef;--warning: #fff7e5;--warning-line: #f1c76d}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#f7f9fc;font-family:Pretendard,Noto Sans KR,Apple SD Gothic Neo,Segoe UI,sans-serif;line-height:1.55}a{color:inherit}button,input{font:inherit}.site-header{height:72px;display:flex;align-items:center;justify-content:space-between;max-width:1080px;margin:0 auto;padding:0 24px}.brand{display:flex;gap:11px;align-items:center;text-decoration:none}.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(145deg,#2377ef,#174fae);color:#fff;font-weight:900;font-size:25px}.brand strong{display:block;font-size:21px;letter-spacing:-.5px}.brand small{display:block;margin-top:-4px;color:var(--muted);font-size:11px}.official-domain{color:var(--muted);font-size:13px}.official-domain strong{color:var(--blue)}main{max-width:960px;margin:0 auto;padding:42px 24px 90px}.hero{text-align:center}.eyebrow{margin:0 0 12px;color:var(--blue);font-weight:750;font-size:14px}h1{margin:0;font-size:clamp(37px,6vw,58px);line-height:1.16;letter-spacing:-2.5px}.lead{color:var(--muted);font-size:18px;margin:20px auto 30px}.support-card{max-width:620px;margin:0 auto;padding:25px;text-align:left;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 16px 45px #25395b1a}.support-card label{display:block;margin-bottom:9px;font-weight:750}.code-row{display:grid;grid-template-columns:1fr 150px;gap:10px}.code-row input{width:100%;min-width:0;height:58px;padding:0 18px;border:2px solid #c9d4e4;border-radius:12px;color:var(--ink);font-size:27px;font-weight:800;letter-spacing:9px;outline:none}.code-row input:focus{border-color:var(--blue);box-shadow:0 0 0 4px #1b63d91f}.code-row button{border:0;border-radius:12px;background:var(--blue);color:#fff;font-weight:750;cursor:pointer}.code-row button:hover{background:var(--blue-dark)}.field-help,.field-error{margin:8px 2px 0;font-size:12px}.field-help{color:var(--muted)}.field-error{color:#c52232;min-height:18px}.start-panel{margin:28px auto 64px;max-width:720px;padding:30px;background:#102a52;color:#fff;border-radius:22px;text-align:center;box-shadow:0 20px 55px #102a5238}.confirmed-code{display:inline-flex;gap:10px;align-items:center;padding:7px 12px;border-radius:999px;background:#ffffff1a}.confirmed-code span{color:#bcd4f8;font-size:12px}.confirmed-code strong{letter-spacing:3px}.start-panel h2{margin:16px 0 8px;font-size:25px}.start-panel>p{margin:0 auto 22px;max-width:590px;color:#d4e2f6}.actions{display:grid;grid-template-columns:1fr 190px;gap:10px}.primary-action,.secondary-action{min-height:62px;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:12px;text-decoration:none;font-weight:800;cursor:pointer}.primary-action{background:#fff;color:#174f9e}.primary-action:hover{background:#f1f6ff}.primary-action small{font-weight:500;color:#64728a}.secondary-action{border:1px solid #5d79a3;background:transparent;color:#fff}.secondary-action:hover{background:#ffffff14}.action-status{min-height:20px;margin:14px 0 0!important;font-size:13px;color:#a9e6bf!important}.platform-note{padding:18px;background:#ffffff17;border-radius:12px}.platform-note strong,.platform-note span{display:block}.platform-note span{margin-top:6px;color:#d4e2f6}.section-heading p{margin:0;color:var(--blue);font-size:13px;font-weight:800}.section-heading h2{margin:3px 0 24px;font-size:28px;letter-spacing:-.7px}.steps{margin:60px 0}.steps ol{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;list-style:none;padding:0;margin:0}.steps li{min-height:160px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px}.steps li>span{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--sky);color:var(--blue);font-weight:900}.steps li strong{display:block;margin-top:15px}.steps li p{margin:5px 0 0;color:var(--muted);font-size:14px}.steps code{font-size:12px;overflow-wrap:anywhere}.windows-warning{display:grid;grid-template-columns:46px 1fr;gap:15px;padding:25px;border:1px solid var(--warning-line);border-radius:17px;background:var(--warning)}.warning-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:#e8a31b;color:#fff;font-weight:900;font-size:20px}.windows-warning h2{margin:2px 0 7px;font-size:21px}.windows-warning p{margin:5px 0;color:#665634}.windows-warning ol{margin:12px 0;padding-left:20px}.windows-warning li{margin:5px 0}.warning-limit{font-weight:800;color:#7a3f22!important}.integrity{margin:18px 0 60px;padding:16px 19px;background:#fff;border:1px solid var(--line);border-radius:13px}.integrity summary{cursor:pointer;font-weight:750}.integrity dl{margin:16px 0 0}.integrity dl div{display:grid;grid-template-columns:90px 1fr;gap:10px;padding:7px 0;border-top:1px solid #edf1f6}.integrity dt{color:var(--muted)}.integrity dd{margin:0;min-width:0;overflow-wrap:anywhere}.integrity code{font-size:12px}.safety{text-align:center;padding:0 8%}.safety h2{margin:0 0 10px;font-size:28px}.safety p{color:var(--muted)}footer{display:flex;justify-content:space-between;gap:20px;max-width:1080px;margin:0 auto;padding:25px 24px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}footer nav{display:flex;flex-wrap:wrap;gap:16px}@media(max-width:680px){.official-domain{display:none}main{padding-top:25px}h1{letter-spacing:-1.6px}.lead{font-size:15px}.support-card{padding:18px}.code-row{grid-template-columns:1fr}.code-row button{height:52px}.actions,.steps ol{grid-template-columns:1fr}.steps li{min-height:0}.start-panel{padding:24px 18px}.windows-warning{grid-template-columns:1fr}footer{flex-direction:column}}