:root{--navy:#26364a;--coral:#e86f61;--coral-hover:#d85f51;--bg:#faf8f4;--card-bg:#fff;--text:#2b3037;--text-secondary:#68717d;--divider:#e4e1dc;--subject-korean:#c55a6a;--subject-english:#4f78b8;--subject-math:#7967b8;--subject-science:#4f8b68;--subject-social:#d17a43;--subject-info:#3f8c91;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}html{font-size:16px}html.large-text{font-size:19px}body{background:var(--bg);color:var(--text);margin:0;font-family:Pretendard,Noto Sans KR,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}button{font:inherit;cursor:pointer}#root{min-height:100svh}.login-page{background:var(--bg);grid-template-columns:1fr 1fr;align-items:center;gap:48px;min-height:100svh;padding:48px;display:grid}@media 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0;font-size:14px}.home-lessons{grid-template-columns:1.4fr 1fr;gap:20px;display:grid}@media (width<=860px){.home-lessons{grid-template-columns:1fr}}.lesson-card{background:var(--card-bg);border:1px solid var(--divider);border-radius:16px;padding:24px}.lesson-card-label{color:var(--coral);margin:0;font-size:15px;font-weight:700}.lesson-card-subject{color:var(--text-secondary);margin:12px 0 0;font-size:15px}.lesson-card-title{color:var(--navy);margin:6px 0 0;font-size:22px;font-weight:800}.lesson-card-description{color:var(--text);margin:10px 0 0;font-size:16px;line-height:1.7}.lesson-card-meta{color:var(--text-secondary);margin:14px 0 0;font-size:15px;line-height:1.6}.lesson-card .primary-button,.lesson-card .secondary-button{margin-top:20px}.home-menu{grid-template-columns:repeat(4,1fr);gap:16px;display:grid}@media (width<=960px){.home-menu{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.home-menu{grid-template-columns:1fr}}.menu-card{background:var(--card-bg);border:1px solid var(--divider);text-align:left;border-radius:14px;justify-items:start;gap:6px;padding:20px;text-decoration:none;display:grid}.menu-card:hover{border-color:var(--coral)}.menu-card-disabled{opacity:.6}.menu-card-disabled:hover{border-color:var(--divider)}.menu-card-icon{width:28px;height:28px;color:var(--coral);margin-bottom:4px}.menu-card-icon svg{width:100%;height:100%}.menu-card-title{color:var(--navy);font-size:18px;font-weight:700}.menu-card-description{color:var(--text-secondary);font-size:15px}@media (width<=860px){.app{flex-direction:column}.sidebar{flex-flow:wrap;align-items:center;width:auto;padding:16px 20px}.sidebar-logo{margin-bottom:0;margin-right:auto;padding:0}.sidebar-menu,.sidebar-footer{display:none}.content{padding:24px 20px}}.page-title{color:var(--navy);margin:0 0 20px;font-size:28px;font-weight:800}.breadcrumb{color:var(--text-secondary);margin:0 0 12px;font-size:14px}.breadcrumb a{color:var(--text-secondary)}.empty-state{background:var(--card-bg);border:1px 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a{color:var(--coral)}.learn-actions{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.learn-back{margin-top:24px}.learn-back a{color:var(--text-secondary)}