:root{color-scheme:light;--bg: #f2f6fb;--sidebar: #18233f;--sidebar-soft: #223866;--blue: #3f7ae3;--blue-soft: #eaf3ff;--panel: #ffffff;--ink: #18233f;--muted: #6f7b92;--line: #d7e4f8;--shadow: 0 22px 48px rgba(22, 38, 66, .1)}*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(circle at top left,rgba(77,132,255,.12),transparent 22%),radial-gradient(circle at bottom right,rgba(24,119,242,.08),transparent 18%),linear-gradient(180deg,#f8fbff 0%,var(--bg) 100%);color:var(--ink);font-family:Inter,Noto Sans KR,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button{font:inherit}.authGateShell{min-height:100vh;background:radial-gradient(circle at top left,rgba(77,132,255,.12),transparent 22%),radial-gradient(circle at bottom right,rgba(24,119,242,.08),transparent 18%),linear-gradient(180deg,#f8fbff,#f2f6fb)}.authServiceShell{display:grid;align-content:center;min-height:100vh;max-width:520px;margin:0 auto;padding:32px 24px}.shell{position:relative;display:block;min-height:100vh}.sidebar{position:fixed;top:0;left:0;z-index:30;display:flex;flex-direction:column;gap:28px;width:min(300px,calc(100vw - 28px));height:100vh;padding:24px;background:linear-gradient(180deg,#18233f,#223866);color:#f8faf8;box-shadow:0 28px 80px #1626423d;transform:translate(0);opacity:1;visibility:visible;transition:transform .18s ease,opacity .18s ease,visibility .18s ease}.sidebar[data-collapsed=true]{transform:translate(calc(-100% - 18px));opacity:0;visibility:hidden;pointer-events:none}.brand{display:inline-flex;align-items:center;gap:12px;color:inherit;text-decoration:none}.brandMark{display:grid;width:38px;height:38px;place-items:center;border-radius:9px;background:linear-gradient(180deg,#79a9ff,#5c90f3);color:#fff;font-weight:900}.brand strong,.brand small{display:block}.brand small{color:#f8faf8a8;font-size:.78rem;margin-top:1px}.brandText,.tabLabel{transition:opacity .16s ease,max-width .16s ease}.sidebarToggle{display:inline-grid;grid-template-columns:24px minmax(0,1fr);align-items:center;gap:10px;min-height:44px;border:1px solid rgba(255,255,255,.14);border-radius:8px;background:#ffffff0a;color:#f8faf8;padding:8px 10px;text-align:left;cursor:pointer}.sidebarToggle span{display:grid;width:24px;height:24px;place-items:center;border-radius:6px;background:#ffffff14;font-weight:900}.sidebarToggle strong{font-size:.92rem}.floatingSidebarToggle{position:fixed;top:18px;left:18px;z-index:20;display:inline-grid;grid-template-columns:28px minmax(0,1fr);align-items:center;gap:10px;min-height:46px;border:1px solid rgba(63,122,227,.16);border-radius:999px;background:#fffffff0;color:var(--ink);box-shadow:0 16px 40px #1626421f;padding:8px 14px 8px 10px;cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.floatingSidebarToggle span{display:grid;width:28px;height:28px;place-items:center;border-radius:999px;background:var(--blue);color:#fff;font-size:.94rem;font-weight:900}.floatingSidebarToggle strong{font-size:.92rem;white-space:nowrap}.floatingLogoutButton{position:fixed;top:18px;right:18px;z-index:20;min-height:46px;border:1px solid rgba(63,122,227,.16);border-radius:999px;background:#fffffff0;color:var(--ink);box-shadow:0 16px 40px #1626421f;padding:8px 16px;font-size:.92rem;font-weight:700;cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.sidebarBackdrop{display:none;position:fixed;inset:0;z-index:10;border:0;background:#18233f33;opacity:1;visibility:visible;transition:opacity .18s ease,visibility .18s ease}.tabList{display:grid;gap:10px}.tabButton{display:grid;grid-template-columns:44px minmax(0,1fr);align-items:center;gap:12px;width:100%;min-height:66px;border:1px solid rgba(255,255,255,.12);border-radius:8px;background:transparent;color:#f8faf8c2;padding:10px;text-align:left;cursor:pointer}.tabButton span{display:grid;width:44px;height:44px;place-items:center;border-radius:8px;background:#79a9ff29;color:#fff;font-size:.8rem;font-weight:900}.tabButton strong{overflow-wrap:anywhere;font-size:1rem}.tabButton:hover,.tabButton:focus-visible{border-color:#79a9ff6b;background:var(--sidebar-soft)}.tabButton[data-active=true]{border-color:#79a9ffb8;background:#3f7ae357;color:#fff}.tabButton[data-active=true] span{background:var(--blue)}.shell[data-sidebar-collapsed=true] .sidebarBackdrop{opacity:0;visibility:hidden;pointer-events:none}.workspace{padding:70px 20px 20px;transition:margin-left .18s ease,padding .18s ease}.shell[data-sidebar-collapsed=false] .workspace{margin-left:calc(min(300px,calc(100vw - 28px)) + 18px)}.appMount{min-height:calc(100vh - 106px);background:transparent;padding:0}.authCard{border:1px solid var(--line);border-radius:18px;background:#fffffff5;box-shadow:0 28px 60px #1626421f;padding:20px}.authCardGate{padding:36px 34px 28px}.authCardHeaderGate{align-items:end}.authBackButton{display:inline-flex;align-items:center;gap:8px;border:0;background:transparent;color:#273452;padding:0;font-weight:700;cursor:pointer}.authBackButton span{font-size:1.1rem;line-height:1}.authMark{display:grid;width:72px;height:72px;margin:0 auto 22px;place-items:center;border-radius:20px;background:linear-gradient(180deg,#79a9ff,#5c90f3);color:#fff;box-shadow:0 18px 36px #5c90f347;font-size:2rem}.authTitleBlock{margin-bottom:22px;text-align:center}.authTitleBlock h1{margin:0;font-size:clamp(2rem,5vw,2.9rem);line-height:1.08;letter-spacing:0;color:#18233f}.authTitleBlock p{margin:12px 0 0;color:#6f7b92;font-size:1rem;line-height:1.55}.authTitleBlockCompact{margin-top:10px;margin-bottom:18px}.authTitleBlockTop{margin-top:0}.authSectionLabel{margin:0 0 2px;color:#273452;font-size:.92rem;font-weight:800}.authCardHeader{display:flex;align-items:center;justify-content:space-between;gap:16px}.authEyebrow{margin:0 0 8px;color:var(--blue);font-size:.8rem;font-weight:800;text-transform:uppercase}.authCardHeader h2{margin:0;font-size:1.5rem;line-height:1.1}.authCardHint{margin:0;color:var(--muted);font-size:.9rem;line-height:1.5}.authAction,.authSubmit,.authModeButton{min-height:42px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:10px 14px;cursor:pointer}.authAction:hover,.authSubmit:hover,.authModeButton:hover,.authAction:focus-visible,.authSubmit:focus-visible,.authModeButton:focus-visible{border-color:#3f7ae35c}.authModeTabs{display:inline-grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:18px}.authModeButton[data-active=true]{border-color:var(--blue);background:#3f7ae314;color:var(--blue);font-weight:700}.authForm{display:grid;gap:14px;margin-top:18px}.authField{display:grid;gap:8px}.authField span{font-size:.92rem;font-weight:700}.authField input{width:100%;min-height:46px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);padding:10px 12px}.authField input:focus{outline:2px solid rgba(63,122,227,.18);border-color:#3f7ae366}.authFieldIcon{position:relative}.authFieldIconMark{position:absolute;top:50%;left:18px;z-index:1;transform:translateY(-50%);color:#273452;font-size:1rem;font-weight:700;line-height:1;pointer-events:none}.authFieldIcon input{padding-left:50px}.authSubmit{width:100%;background:var(--sidebar);border-color:var(--sidebar);color:#fff}.authSubmitPrimary{min-height:56px;border-radius:14px;background:linear-gradient(180deg,#4b84eb,#3f7ae3);border-color:#3f7ae3;box-shadow:0 14px 26px #3f7ae338;font-size:1rem;font-weight:700}.rememberRow{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.92rem}.rememberRow input{width:16px;height:16px}.authSwitchRow{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:20px;padding-top:18px;border-top:1px solid #e6edf8;color:#6f7b92;font-size:.95rem}.authSwitchRowSecondary{margin-top:10px;padding-top:0;border-top:0}.authTextButton{border:0;background:transparent;color:#3f7ae3;padding:0;font-weight:700;cursor:pointer}.authFormGate{max-width:none}.authSignedIn{display:grid;gap:8px;margin-top:18px}.authSignedIn strong{font-size:1rem}.authSignedIn p,.authMessage{margin:0;color:var(--muted);line-height:1.6}.authMessage{margin-top:16px}.authMessage.is-error{color:#b42318}.authModalLayer{position:fixed;inset:0;z-index:60;display:grid;place-items:center;background:#18233f47;padding:24px}.authModal{width:min(420px,100%);border:1px solid #dbe7ff;border-radius:18px;background:#fff;box-shadow:0 26px 60px #1626422e;padding:28px 24px 22px;text-align:center}.authModal h2{margin:0;color:#18233f;font-size:1.45rem;line-height:1.2}.authModal p{margin:14px 0 0;color:#6f7b92;line-height:1.65}.authModalButton{width:100%;min-height:52px;margin-top:22px;border:1px solid #3f7ae3;border-radius:14px;background:linear-gradient(180deg,#4b84eb,#3f7ae3);color:#fff;font-size:1rem;font-weight:700;cursor:pointer}.frameShell{overflow:hidden;min-height:min(78vh,980px);border:0;border-radius:0;background:transparent}.studyFrame{display:block;width:100%;min-height:calc(100vh - 152px);border:0;background:#fff}@media(max-width:760px){.authServiceShell{min-height:100vh;padding-top:36px;padding-bottom:36px}.authCardGate{padding-left:20px;padding-right:20px}.sidebar{width:min(300px,calc(100vw - 22px));padding:18px}.sidebarBackdrop{display:block}.shell[data-sidebar-collapsed=false] .workspace{margin-left:0}.tabList{grid-template-columns:repeat(2,minmax(0,1fr))}.tabButton{grid-template-columns:1fr;min-height:104px}.workspace{padding:78px 12px 12px}.authCardHeader{align-items:start;flex-direction:column}}