:root{--brand:#e8541a;--brand-dark:#c44010;--brand-light:#f06030;--brand-glow:#e8541a1f;--brand-glow-strong:#e8541a38;--bg:#0f0f0f;--bg2:#161616;--bg3:#1e1e1e;--bg4:#252525;--surface:#1a1a1a;--surface2:#222;--surface3:#2a2a2a;--border:#ffffff12;--border2:#ffffff1f;--border3:#ffffff2e;--text:#f0ede8;--text2:#a09890;--text3:#666058;--font-head:"Rajdhani", sans-serif;--font-body:"DM Sans", sans-serif;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--diff-easy-bg:#3f78282e;--diff-easy-text:#7dc855;--diff-med-bg:#b4781e2e;--diff-med-text:#f0a535;--diff-hard-bg:#b432282e;--diff-hard-text:#f05c50;--nav-height:58px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-body);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;font-size:15px;line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:var(--font-body)}input,textarea,select{font-family:var(--font-body)}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--border3)}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:.4s forwards fadeUp}.fade-up-delay-1{opacity:0;animation-delay:50ms;animation-fill-mode:forwards}.fade-up-delay-2{opacity:0;animation-delay:.1s;animation-fill-mode:forwards}.fade-up-delay-3{opacity:0;animation-delay:.15s;animation-fill-mode:forwards}.fade-up-delay-4{opacity:0;animation-delay:.2s;animation-fill-mode:forwards}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton{background:linear-gradient(90deg, var(--bg3) 25%, var(--bg4) 50%, var(--bg3) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}