:root{--font:"Noto Sans", "Noto Sans KR", "Noto Sans SC", "Noto Sans JP", system-ui, sans-serif;--text-sm:.875rem;--text-base:1rem;--text-lg:1.5rem;--topbar-h:48px;--topbar-px:16px;--topbar-py:16px;--landing-header-gap:10px;--landing-section-gap:34px;--landing-brand-size:24px;--landing-subtitle-lh:1.5;--landing-subtitle-lines:2;--download-btn-min-w:320px;--corner-btn-min-w:168px;--bg-0:#eef3f8;--bg-1:#dbe6f2;--panel:#ffffffe0;--line:#c5d0dc;--text:#1e293b;--muted:#64748b;--accent:#2563eb;--accent-hover:#1d4ed8;--shadow:0 18px 40px #2563eb1f}*{box-sizing:border-box}html,body{height:100%;margin:0;overflow:hidden}body{font-family:var(--font);color:var(--text);background:var(--bg-0)}.topbar{z-index:10;align-items:center;display:flex;position:fixed;top:0;left:0}.logo-btn{min-height:var(--topbar-h);padding:var(--topbar-py) var(--topbar-px);align-items:center;text-decoration:none;display:inline-flex}.logo-img{opacity:.92;width:auto;height:11px;display:block}.topbar-actions{z-index:10;min-height:var(--topbar-h);padding:0 var(--topbar-px);align-items:center;display:flex;position:fixed;top:0;right:0}.lang-dropdown{min-height:var(--topbar-h);align-items:center;display:inline-flex;position:relative}.lang-dropdown__btn{border:1px solid var(--line);background:var(--panel);width:100px;height:32px;color:var(--text);font-family:inherit;font-size:var(--text-sm);white-space:nowrap;cursor:pointer;justify-content:space-between;align-items:center;gap:10px;padding:0 12px;font-weight:500;line-height:1;transition:border-color .2s,color .2s;display:inline-flex}.lang-dropdown__label{text-align:left;flex:1;min-width:0}.lang-dropdown__btn:hover{border-color:var(--accent);color:var(--accent)}.lang-dropdown__btn:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 2px #2563eb2e}.lang-dropdown__chev{opacity:.65;flex-shrink:0;width:18px;height:18px;margin-right:-3px;transition:transform .2s}.lang-dropdown.is-open .lang-dropdown__chev{transform:rotate(180deg)}.lang-dropdown__menu{z-index:11;border:1px solid var(--line);width:max-content;min-width:100%;box-shadow:var(--shadow);background:#fff;position:absolute;top:calc(100% + 4px);right:0;overflow:hidden}.lang-dropdown__menu[hidden]{display:none}.lang-dropdown__option{width:100%;color:var(--text);font-family:inherit;font-size:var(--text-sm);text-align:left;cursor:pointer;background:0 0;border:none;padding:8px 12px;font-weight:500;line-height:1.5;transition:background .2s,color .2s;display:block}.lang-dropdown__option:hover{color:var(--accent);background:#2563eb14}.lang-dropdown__option.is-active{color:var(--accent);background:#2563eb1a}.landing{justify-content:center;align-items:center;height:100dvh;min-height:100dvh;padding:24px;display:flex;position:relative;overflow-y:auto}.landing--pending{visibility:hidden}.landing__bg{background:radial-gradient(circle at 20% 20%, #2563eb1f, transparent 42%), radial-gradient(circle at 80% 80%, #2563eb14, transparent 38%), linear-gradient(180deg, var(--bg-0), var(--bg-1));position:fixed;inset:0}.landing__content{z-index:1;align-items:center;gap:var(--landing-section-gap);flex-direction:column;width:min(760px,100%);margin:auto;display:flex;position:relative}.landing__header,.guide-video,.landing__cta{flex-shrink:0;width:100%}.landing__header{align-items:flex-start;gap:var(--landing-header-gap);text-align:left;flex-direction:column;display:flex}.landing__brand{min-height:var(--landing-brand-size);align-items:center;gap:10px;display:flex}.landing__brand-icon{width:var(--landing-brand-size);height:var(--landing-brand-size);-webkit-user-drag:none;-webkit-user-select:none;user-select:none;flex-shrink:0;display:block}.landing__brand-name{margin:0;font-size:15px;font-weight:500;line-height:1}.landing__brand-version{color:var(--muted);font-weight:400}.landing__subtitle{min-height:calc(15px * var(--landing-subtitle-lines));color:var(--muted);font-size:15px;line-height:var(--landing-subtitle-lh);margin:0}.guide-video{border:1px solid var(--line);background:var(--panel);width:100%;box-shadow:var(--shadow);border-radius:7px;overflow:hidden}.guide-video__image{-webkit-user-drag:none;-webkit-user-select:none;user-select:none;width:100%;height:auto;display:block}.landing__cta{flex-direction:column;align-items:center;gap:10px;margin-top:34px;margin-bottom:50px;display:flex}.download-btn{min-width:var(--download-btn-min-w);color:#fff;white-space:nowrap;cursor:pointer;background:linear-gradient(#47a6f5 0%,#0078d4 52%,#005a9e 100%);border:1px solid #004578;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:0 24px;font-family:inherit;font-size:.95rem;font-weight:600;line-height:1;text-decoration:none;transition:background .15s,border-color .15s,box-shadow .15s;display:inline-flex;box-shadow:inset 0 1px #ffffff47,0 2px 8px #0078d447}.download-btn:hover{background:linear-gradient(#5eb3ff 0%,#1084d8 52%,#006cbe 100%);border-color:#003d66;box-shadow:inset 0 1px #ffffff57,0 4px 12px #0078d457}.download-btn__icon{flex-shrink:0;width:22px;height:22px;position:relative;top:-.5px}.download-btn__label{position:relative;top:1px}.download-btn--disabled{color:#ffffffe0;opacity:.62;cursor:not-allowed;background:linear-gradient(#7eb8ea 0%,#4a98d4 52%,#3a7db8 100%);border-color:#5a8fb8;box-shadow:inset 0 1px #ffffff2e,0 1px 2px #005a9e29}.download-btn--disabled:hover{background:linear-gradient(#7eb8ea 0%,#4a98d4 52%,#3a7db8 100%);border-color:#5a8fb8;box-shadow:inset 0 1px #ffffff2e,0 1px 2px #005a9e29}.download-btn--disabled .download-btn__icon{opacity:.72}.landing__version{min-height:calc(var(--text-sm) * 1.5);color:var(--muted);font-size:var(--text-sm);text-align:center;white-space:nowrap;margin:0;line-height:1.5}.corner-actions{z-index:10;min-height:var(--topbar-h);padding:var(--topbar-py) var(--topbar-px);align-items:center;display:flex;position:fixed;bottom:0;right:0}.corner-btn{min-width:var(--corner-btn-min-w);color:#7a4518;height:36px;font-family:inherit;font-size:var(--text-sm);white-space:nowrap;cursor:pointer;background:linear-gradient(#fff9f2 0%,#f6e8d4 48%,#e8d2b0 100%);border:1px solid #b0763a73;border-radius:9999px;justify-content:center;align-items:center;gap:6px;padding:0 16px 0 14px;font-weight:600;line-height:1;text-decoration:none;transition:border-color .2s,color .2s,background .2s,box-shadow .2s,transform .2s;display:inline-flex;box-shadow:inset 0 1px #ffffffe6,0 2px 10px #7a451829}.corner-btn__icon{flex-shrink:0;width:16px;height:16px}.corner-btn:hover{color:#5c3410;background:linear-gradient(#fffdf8 0%,#faecd8 48%,#edd5b5 100%);border-color:#9e5c20b3;transform:translateY(-1px);box-shadow:inset 0 1px #fffffff2,0 4px 14px #7a45183d}.corner-btn:focus{border-color:#9e5c20bf;outline:none;box-shadow:inset 0 1px #fffffff2,0 0 0 3px #d2944847}.corner-btn--static{cursor:default;opacity:.78}.corner-btn--static:hover{color:#7a4518;background:linear-gradient(#fff9f2 0%,#f6e8d4 48%,#e8d2b0 100%);border-color:#b0763a73;transform:none;box-shadow:inset 0 1px #ffffffe6,0 2px 10px #7a451829}@media (max-width:640px){:root{--landing-section-gap:16px;--landing-subtitle-lines:3;--download-btn-min-w:100%}.landing{padding:16px}.download-btn{white-space:normal;text-align:center;width:100%;max-width:360px}}