:root{--text:#0b1220;--text-h:#071022;--bg:#f6f7fb;--border:#dfe8ff;--code-bg:#edf6ff;--primary:#06f;--secondary:#f07;--accent:#f06;--accent-bg:#0066ff14;--accent-border:#ff00772e;--social-bg:#f4f3ec80;--shadow:#0206171f 0 16px 36px -12px, #0206170f 0 8px 18px -6px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}body:before{content:"";z-index:-1;filter:saturate(1.02);background:linear-gradient(#0ea5a40a 0%,#7c3aed08 50%,#fafaff05 100%);position:fixed;inset:0}.sidebar{min-height:60vh;padding:10px}.main-content{min-height:60vh}.card{color:#fff;box-shadow:var(--shadow);will-change:transform, box-shadow;border-radius:12px;padding:18px;transition:transform .3s cubic-bezier(.2,.9,.2,1),box-shadow .3s,filter .3s}.card:hover{transform:translateY(-10px)scale(1.02);box-shadow:0 18px 36px -12px #0206171f,0 8px 16px -6px #0206170f}.card:after{content:""}.card:after .card-1{background:linear-gradient(135deg, var(--primary) 0%, #00a3ff 100%)}.card:after .card-2{background:linear-gradient(135deg,#ff4d4f 0%,#ff7a7d 100%)}.card:after .card-3{background:linear-gradient(135deg,#00c853 0%,#00e676 100%)}.card:after .card-4{background:linear-gradient(135deg, var(--secondary) 0%, #ff69b4 100%);color:#08101a}.card:after{pointer-events:none;opacity:.06;background:linear-gradient(120deg,#ffffff14,#0000 40%);border-radius:12px;position:absolute;inset:0}.reveal-hidden{opacity:0;transform:translateY(14px)}.reveal{opacity:1;transition:all .42s cubic-bezier(.2,.9,.2,1);transform:translateY(0)}.recent-card{transition:transform .32s,box-shadow .32s}.recent-card:hover{transform:translateY(-6px);box-shadow:0 12px 24px -8px #0206170f}.card-2{background:linear-gradient(135deg,#ff8a65 0%,#ffb996 100%)}.card-3{background:linear-gradient(135deg,#34d399 0%,#059669 100%)}.card-4{background:linear-gradient(135deg, var(--secondary) 0%, #b794f4 100%);color:#08101a}.card-1{background:linear-gradient(135deg, var(--page-accent,var(--primary)) 0%, var(--page-accent2,#2dd4bf) 100%)}.page-dashboard{--page-accent:#06f;--page-accent2:#00a3ff}.page-topics{--page-accent:#f07;--page-accent2:#ff69b4}.page-login{--page-accent:#ff4d4f;--page-accent2:#ff7a7d}.page-register{--page-accent:#f06;--page-accent2:#ff4d6d}.page-chats{--page-accent:#00c853;--page-accent2:#00e676}.page-generate-quiz{--page-accent:#06b6d4;--page-accent2:#00a3ff}.page-create-question{--page-accent:#f59e0b;--page-accent2:#f97316}.page-quiz-sessions{--page-accent:#8b5cf6;--page-accent2:#7c3aed}.page-topic-detail{--page-accent:#06b6d4;--page-accent2:#7c3aed}.stat-number{margin-top:8px;font-size:28px;font-weight:700}.stat-label{opacity:.9}@media (width<=900px){.app-grid{grid-template-columns:1fr!important}.sidebar{display:none}}#root{text-align:left;box-sizing:border-box;border-inline:0;flex-direction:column;width:100%;max-width:100%;min-height:100svh;margin:0;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}