@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";
:root{--navy-950:#020617;--navy-900:#0a1628;--navy-800:#0f1d32;--navy-700:#1a2744;--navy-600:#1e3a5f;--navy-500:#2563eb;--emerald-400:#34d399;--emerald-500:#10b981;--emerald-600:#059669;--teal-400:#2dd4bf;--teal-500:#14b8a6;--slate-50:#f8fafc;--slate-100:#f1f5f9;--slate-200:#e2e8f0;--slate-300:#cbd5e1;--slate-400:#94a3b8;--slate-500:#64748b;--slate-600:#475569;--slate-700:#334155;--slate-800:#1e293b;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--surface-primary:#0f172a;--surface-card:#0f172acc;--surface-card-hover:#1e293bcc;--surface-glass:#0f172a99;--glass-border:#94a3b81a;--glass-shadow:0 8px 32px #0000004d;--font-family:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:50%;--transition-fast:.15s ease;--transition-base:.25s ease;--transition-slow:.4s ease;--max-width:1280px;--max-width-narrow:960px}[data-theme=light]{--navy-950:#f8fafc;--navy-900:#fff;--navy-800:#f1f5f9;--navy-700:#e2e8f0;--navy-600:#cbd5e1;--slate-50:#020617;--slate-100:#0f172a;--slate-200:#1e293b;--slate-300:#334155;--slate-400:#475569;--slate-500:#94a3b8;--surface-primary:#f8fafc;--surface-card:#fffffff2;--surface-card-hover:#f1f5f9f2;--surface-glass:#ffffffeb;--glass-border:#0f172a1a;--glass-shadow:0 8px 32px #0000000f}[data-theme=light] body{color:#1e293b;background:#f8fafc}[data-theme=light] a:not(.btn){color:var(--emerald-600)}[data-theme=light] a:not(.btn):hover{color:var(--emerald-500)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-family);background:var(--navy-950);color:var(--slate-200);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6;overflow-x:hidden}a{color:var(--emerald-400);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--emerald-500)}img{max-width:100%;height:auto}button{cursor:pointer;border:none;outline:none;font-family:inherit}input,textarea,select{font-family:inherit;font-size:inherit}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.container--narrow{max-width:var(--max-width-narrow);margin:0 auto;padding:0 24px}.btn{border-radius:var(--radius-md);transition:all var(--transition-base);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex}.btn--primary{background:linear-gradient(135deg, var(--emerald-500), var(--teal-500));color:#fff;box-shadow:0 4px 14px #10b98159}.btn--primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 6px 20px #10b98180}.btn--secondary{color:var(--slate-200);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:0 0}.btn--secondary:hover{background:var(--surface-card-hover);border-color:var(--slate-500);color:#fff}.btn--danger{color:#fff;background:linear-gradient(135deg,#ef4444,#dc2626);box-shadow:0 4px 14px #ef444459}.btn--danger:hover{transform:translateY(-2px);box-shadow:0 6px 20px #ef444480}.btn--ghost{color:var(--slate-400);background:0 0;padding:8px 16px}.btn--ghost:hover{color:var(--slate-200);background:#94a3b81a}.btn--sm{padding:8px 16px;font-size:.85rem}.btn--lg{padding:16px 32px;font-size:1.05rem}.btn--full{width:100%}.card{background:var(--surface-card);border:1px solid var(--glass-border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:all var(--transition-base);padding:24px}.card:hover{box-shadow:var(--glass-shadow);border-color:#94a3b833}.card--glow{position:relative;overflow:hidden}.card--glow:before{content:"";background:linear-gradient(90deg, transparent, var(--emerald-400), transparent);opacity:0;height:1px;transition:opacity var(--transition-base);position:absolute;top:0;left:0;right:0}.card--glow:hover:before{opacity:1}.badge{border-radius:var(--radius-sm);text-transform:uppercase;letter-spacing:.5px;align-items:center;padding:4px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.badge--easy{color:var(--emerald-400);background:#10b98126}.badge--medium{color:var(--warning);background:#f59e0b26}.badge--hard{color:var(--danger);background:#ef444426}.badge--domain{color:var(--info);background:#3b82f626}.input{background:var(--navy-800);border:1px solid var(--glass-border);border-radius:var(--radius-md);width:100%;color:var(--slate-200);transition:all var(--transition-fast);padding:12px 16px;font-size:.95rem}.input:focus{border-color:var(--emerald-500);outline:none;box-shadow:0 0 0 3px #10b98126}.input::placeholder{color:var(--slate-500)}.select{background:var(--navy-800);border:1px solid var(--glass-border);border-radius:var(--radius-md);width:100%;color:var(--slate-200);transition:all var(--transition-fast);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-position:right 16px center;background-repeat:no-repeat;padding:12px 40px 12px 16px;font-size:.95rem}.select:focus{border-color:var(--emerald-500);outline:none;box-shadow:0 0 0 3px #10b98126}.textarea{background:var(--navy-800);border:1px solid var(--glass-border);border-radius:var(--radius-md);width:100%;color:var(--slate-200);transition:all var(--transition-fast);resize:vertical;min-height:100px;padding:12px 16px;font-size:.95rem}.textarea:focus{border-color:var(--emerald-500);outline:none;box-shadow:0 0 0 3px #10b98126}.label{color:var(--slate-300);margin-bottom:6px;font-size:.85rem;font-weight:600;display:block}.table-wrapper{border:1px solid var(--glass-border);border-radius:var(--radius-lg);overflow-x:auto}.table{border-collapse:collapse;width:100%}.table th{text-align:left;text-transform:uppercase;letter-spacing:.5px;color:var(--slate-400);background:var(--navy-800);border-bottom:1px solid var(--glass-border);padding:14px 16px;font-size:.8rem;font-weight:600}.table td{color:var(--slate-300);border-bottom:1px solid #94a3b80d;padding:14px 16px;font-size:.9rem}.table tr:hover td{background:#94a3b808}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#000000b3;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal{background:var(--navy-800);border:1px solid var(--glass-border);border-radius:var(--radius-lg);width:100%;max-width:600px;max-height:90vh;padding:32px;overflow-y:auto;box-shadow:0 24px 48px #00000080}.modal__header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.modal__title{color:var(--slate-100);font-size:1.25rem;font-weight:700}.modal__close{color:var(--slate-400);border-radius:var(--radius-sm);transition:all var(--transition-fast);background:0 0;padding:8px}.modal__close:hover{color:var(--slate-200);background:#94a3b81a}.modal__body{margin-bottom:24px}.modal__footer{justify-content:flex-end;gap:12px;display:flex}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes gradientShift{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.animate-fade-in{animation:.5s ease-out fadeIn}.animate-fade-in-up{animation:.6s ease-out fadeInUp}.animate-slide-in-right{animation:.5s ease-out slideInRight}.gradient-text{background:linear-gradient(135deg, var(--emerald-400), var(--teal-400), var(--emerald-400));-webkit-text-fill-color:transparent;background-size:200%;-webkit-background-clip:text;background-clip:text;animation:4s infinite gradientShift}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--navy-900)}::-webkit-scrollbar-thumb{background:var(--slate-700);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--slate-600)}@media (max-width:768px){.container{padding:0 16px}.btn--lg{padding:14px 24px;font-size:1rem}.modal{margin:16px;padding:24px}}.skeleton{background:linear-gradient(90deg, var(--navy-800) 25%, var(--navy-700) 50%, var(--navy-800) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}