:root{--brand-600: #4F46E5;--gray-50: #F8FAFC;--gray-900: #0F172A;--radius-md: 8px;--radius-lg: 12px;--shadow-sm: 0 4px 14px rgb(15 23 42 / 4%);color:var(--gray-900);background:var(--gray-50);font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}html,body,#root{margin:0;min-width:320px;min-height:100%}body{background:var(--gray-50)}.app-shell{min-height:100vh}.app-sider{position:sticky!important;top:0;height:100vh;box-shadow:4px 0 18px #0823521f;z-index:2}.brand{height:72px;display:flex;align-items:center;gap:12px;padding:0 21px;color:#fff;font-size:20px;font-weight:700;letter-spacing:.3px;overflow:hidden}.brand-mark{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;border-radius:10px;background:#fff;color:#1769e0;font-weight:800}.brand-logo-image{width:34px;height:34px;object-fit:contain;border-radius:var(--radius-md);background:#fff}.app-sider .ant-menu{border-inline-end:0!important;padding:10px 9px}.app-sider 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9vw;color:#fff;background:linear-gradient(145deg,#082f72,#0f5ac7 55%,#2384ef)}.login-intro:after{content:"";position:absolute;width:420px;height:420px;right:-120px;bottom:-160px;border:80px solid rgba(255,255,255,.08);border-radius:50%}.login-logo{width:52px;height:52px;display:grid;place-items:center;border-radius:14px;background:#fff;color:#1769e0;font-size:30px;font-weight:800}.login-intro h1.ant-typography{max-width:600px;margin-top:80px;color:#fff;font-size:clamp(34px,4vw,58px);line-height:1.24}.login-intro p.ant-typography{max-width:520px;color:#ffffffbf;font-size:17px;line-height:1.8}.login-grid{position:absolute;top:0;right:0;bottom:0;left:0;opacity:.09;background-image:linear-gradient(#fff 1px,transparent 1px),linear-gradient(90deg,#fff 1px,transparent 1px);background-size:48px 48px;pointer-events:none}.login-form-wrap{display:grid;place-items:center;padding:48px}.login-card{width:min(430px,100%);box-shadow:none}.login-card .ant-card-body{padding:36px}.login-card 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#edf0f5}.lesson-row:last-child{border-bottom:0}.lesson-index{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#edf4ff;color:#1769e0;font-size:12px}@media(max-width:860px){.login-page{grid-template-columns:1fr}.login-intro{display:none}.login-form-wrap{min-height:100vh;padding:24px}.app-content{padding:20px 14px}.header-identity{display:none}.page-header{align-items:flex-start}.progress-row{grid-template-columns:1fr;gap:4px}}@media(max-width:620px){.app-sider{position:fixed!important}.app-sider:not(.ant-layout-sider-collapsed){width:220px!important;min-width:220px!important}.app-shell>.ant-layout{margin-left:76px}.top-header{padding:0 14px}.page-header{flex-direction:column}.table-toolbar{flex-wrap:wrap}.lesson-row{align-items:flex-start;gap:10px}}