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:root{--nav:#0a1f3c;--primary:#1b6fff;--primary-deep:#0a1f3c;--grey-100:#f8fafc;--grey-200:#e2e8f0;--grey-300:#cbd5e1;--grey-500:#64748b;--grey-800:#1e293b;--bg:#f8fafc;--surface:#fff;--surface-soft:#eff6ff;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--success:#166534;--blue-light:#eff6ff;--blue-mid:#bfdbfe;--green:#166534;--green-bg:#dcfce7;--purple:#4c1d95;--purple-bg:#ede9fe;--teal:#0d9488;--teal-bg:#ccfbf1;--gold:#92620a;--gold-bg:#fef9c3;--red:#991b1b;--red-bg:#fee2e2;--orange:#92400e;--orange-bg:#fef3c7;--m1:#1b6fff;--m2:#0d9488;--m3:#166534;--m4:#4c1d95;--m5:#92400e;--m6:#991b1b;--sidebar-w:260px;--topbar-h:54px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);min-height:100vh;color:var(--ink);font-family:var(--font-sans), "DM Sans", system-ui, sans-serif;margin:0}h1,h2,h3{font-family:var(--font-serif), "DM Serif Display", Georgia, serif;font-weight:400}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.page-grid{gap:20px;display:grid}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.action-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.auth-split{grid-template-columns:1fr 1fr;display:grid}.mobile-drawer-overlay{z-index:300;background:#0000008c;display:flex;position:fixed;inset:0}.mobile-drawer-panel{background:var(--nav);flex-direction:column;flex-shrink:0;width:min(280px,85vw);height:100%;display:flex;overflow-y:auto}.mobile-only{display:none}@media (max-width:767px){.sidebar-desktop{display:none!important}.content-area{margin-left:0!important}.mobile-only{display:flex!important}.page-grid{grid-template-columns:1fr!important}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.action-grid,.auth-split{grid-template-columns:1fr!important}.auth-split-left{display:none!important}.shell-topbar{padding:0 16px!important}.shell-content{padding:20px 16px!important}.lesson-sidebar{order:-1}.module-sidebar{display:none}}@keyframes ohmar-pulse{0%,to{opacity:.45}50%{opacity:1}}.ohmar-thinking{animation:1.4s ease-in-out infinite ohmar-pulse}@media (prefers-reduced-motion:reduce){.ohmar-thinking{animation:none}}