:root{--radius-lg:16px;--radius-md:12px;--font-ui:Inter, Pretendard, "Noto Sans KR", "Apple SD Gothic Neo", system-ui, sans-serif}:root,:root[data-theme=light]{--bg:#f7f8f4;--surface:#fff;--surface-2:#f0f2ec;--border:#e2e5dc;--text:#15181a;--muted:#667067;--accent:#2f9e44;--accent-text:#1d6e2f;--accent-tint:#e3f4e5;--warn:#b06f0a;--warn-tint:#fbf0d9;--store:#15181a;--store-text:#fff;--shadow:0 1px 2px #14161f0a, 0 8px 24px -12px #14161f1f}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0f1312;--surface:#171c1a;--surface-2:#1f2522;--border:#2b322e;--text:#eef1ec;--muted:#98a199;--accent:#5fd07a;--accent-text:#8fe3a2;--accent-tint:#1e3324;--warn:#ffc24d;--warn-tint:#3a2e12;--store:#eef1ec;--store-text:#0f1312;--shadow:none}}:root[data-theme=dark]{--bg:#0f1312;--surface:#171c1a;--surface-2:#1f2522;--border:#2b322e;--text:#eef1ec;--muted:#98a199;--accent:#5fd07a;--accent-text:#8fe3a2;--accent-tint:#1e3324;--warn:#ffc24d;--warn-tint:#3a2e12;--store:#eef1ec;--store-text:#0f1312;--shadow:none}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-ui);margin:0;font-size:15px;line-height:1.65}a{color:var(--accent-text);text-decoration:none}a:hover{text-decoration:underline}code{background:var(--surface-2);border-radius:5px;padding:0 5px;font-family:inherit;font-weight:700}.topbar{z-index:10;border-bottom:1px solid var(--border);background:var(--bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:sticky;top:0}.topbar-inner{justify-content:space-between;align-items:center;gap:1rem;width:min(100% - 40px,1080px);min-height:68px;margin:0 auto;padding:0;display:flex}.brand{letter-spacing:.02em;align-items:center;gap:.55rem;font-weight:800;display:flex}.brand a{color:var(--text);text-decoration:none}.brand-home,.brand-app{align-items:center;gap:.55rem;display:inline-flex}.brand-home i{background:var(--accent);border-radius:3px;width:9px;height:9px;display:inline-block}.brand-home b{font-size:.98rem}.brand-app small{color:var(--text);letter-spacing:.02em;border-left:1px solid var(--border);align-items:center;gap:.45rem;margin-left:.4rem;padding-left:.6rem;font-size:.98rem;font-weight:800;display:inline-flex}.brand-app img{border-radius:6px}.topnav{flex-wrap:wrap;gap:1.3rem;font-size:.8rem;font-weight:600;display:flex}.topnav a{color:var(--muted)}.topnav a.active{color:var(--text)}.theme-toggle{color:var(--text);background:var(--surface-2);border:1px solid var(--border);cursor:pointer;border-radius:999px;flex-shrink:0;align-items:center;gap:.4rem;padding:.45rem .7rem;font-size:.72rem;font-weight:700;display:inline-flex}.theme-toggle:hover{border-color:var(--accent)}.topbar-actions{flex-shrink:0;gap:.4rem;display:flex}.site-foot{border-top:1px solid var(--border);margin-top:40px}.site-foot-inner{width:min(100% - 40px,1080px);color:var(--muted);flex-wrap:wrap;gap:8px 16px;margin:0 auto;padding:18px 0 28px;font-size:13px;display:flex}.site-foot-inner>span{color:var(--text);margin-right:auto;font-weight:700}.site-foot-inner nav{flex-wrap:wrap;gap:6px 14px;display:flex}.shell{max-width:820px;margin:0 auto;padding:28px 20px 0}.page-head .eyebrow{color:var(--muted);margin:0;font-size:13px;font-weight:700}.page-head h1{letter-spacing:-.01em;margin:2px 0 8px;font-size:30px;line-height:1.3}.page-head p{margin:0 0 6px}.sub{color:var(--muted);font-size:13.5px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);margin-top:14px;padding:18px 22px}.card h2{margin:0 0 8px;font-size:18px}.card ul{margin:6px 0;padding-left:20px}.card li{margin:4px 0}.section-title{margin:12px 0 2px;font-weight:800}.callout{background:var(--accent-tint);border:1px solid var(--accent);border-radius:var(--radius-md);margin-top:10px;padding:12px 14px;font-size:14px}.callout.warn{background:var(--warn-tint);border-color:var(--warn)}.disclaimer{background:var(--surface);border:1.5px solid var(--accent);border-radius:14px;padding:14px 16px;font-size:14px}.hero{grid-template-columns:1.15fr .85fr;align-items:center;gap:28px;width:min(100% - 40px,1080px);margin:0 auto;padding:44px 0 12px;display:grid}.hero h1{letter-spacing:-.02em;margin:12px 0;font-size:36px;line-height:1.25}.hero .lead{color:var(--muted);margin:0 0 18px;font-size:16px}.badge{color:var(--accent-text);background:var(--accent-tint);border-radius:999px;padding:4px 12px;font-size:13px;font-weight:800;display:inline-flex}.stores{flex-wrap:wrap;gap:10px;display:flex}.store{background:var(--store);color:var(--store-text);border-radius:12px;flex-direction:column;padding:8px 18px;font-size:14px;font-weight:800;line-height:1.3;display:inline-flex}.store small{opacity:.75;font-size:11px;font-weight:600}.store.soon{opacity:.45}.hero-note{color:var(--muted);margin-top:12px;font-size:13px}.sample{justify-self:center;width:270px}.sample-phone{background:var(--bg);box-shadow:var(--shadow);border:8px solid #16181d;border-radius:30px;overflow:hidden}.sample-bar{background:var(--surface);border-bottom:1px solid var(--border);padding:10px 12px;font-size:13px;font-weight:800}.sample-row{border-bottom:1px solid var(--border);grid-template-columns:1fr auto;gap:0 8px;padding:8px 12px;font-size:12px;display:grid}.sample-row b{grid-column:1;font-size:12.5px}.sample-row span{color:var(--muted);grid-column:1;font-size:10.5px}.sample-row em{grid-area:1/2/3;align-self:center;font-style:normal;font-weight:800}.sample-cap{text-align:center;color:var(--muted);margin-top:8px;font-size:12px}.feats{grid-template-columns:repeat(3,1fr);gap:14px;width:min(100% - 40px,1080px);margin:0 auto;padding:10px 0;display:grid}.feat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px}.feat .n{color:var(--accent-text);font-size:12px;font-weight:800}.feat h2{margin:4px 0 6px;font-size:17px}.feat p{color:var(--muted);margin:0;font-size:14px}.steps{width:min(100% - 40px,1080px);margin:0 auto;padding:18px 0 0}.steps h2{margin:0;font-size:19px}.steps ol{counter-reset:step;grid-template-columns:repeat(5,1fr);gap:10px;margin:10px 0 0;padding:0;list-style:none;display:grid}.steps li{counter-increment:step;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:12px;font-size:13.5px}.steps li:before{content:counter(step);background:var(--accent);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:22px;height:22px;margin-right:6px;font-size:12px;font-weight:800;display:inline-flex}.guide-grid{grid-template-columns:200px 1fr;gap:28px;width:min(100% - 40px,1080px);margin:0 auto;padding:28px 0 0;display:grid}.toc{align-self:start;font-size:14px;font-weight:700;position:sticky;top:72px}.toc a{break-inside:avoid;padding:3px 0;display:block}.guide h2{margin:26px 0 6px;scroll-margin-top:72px;font-size:18px}.guide p,.guide ol{margin:0 0 8px}.guide ol{padding-left:20px}.metrics{grid-template-columns:1fr 1fr;gap:8px;display:grid}.metric{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:11px 13px;scroll-margin-top:72px;font-size:14px}.metric .caution{color:var(--warn);margin-top:3px;font-weight:700}.mail{margin:0;font-size:18px;font-weight:800}.faq dt{margin-top:12px;font-weight:800}.faq dd{margin:2px 0 0}@media (max-width:760px){.topbar-inner{flex-wrap:wrap;row-gap:.5rem;padding:.7rem 0}.brand-app small{font-size:.9rem}.topnav{flex-wrap:nowrap;order:3;gap:1rem;width:100%;overflow-x:auto}.topnav a{white-space:nowrap}.hero{grid-template-columns:1fr;padding-top:28px}.hero h1{font-size:27px}.feats,.steps ol,.metrics,.guide-grid{grid-template-columns:1fr}.toc{columns:2;position:static}}