*,::after,::before{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background var(--transition-normal),color var(--transition-normal);overflow-x:hidden;min-height:100vh}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none;background:0 0;font-family:inherit;font-size:inherit;color:inherit}input,select,textarea{font-family:inherit;font-size:inherit}img{max-width:100%;display:block}:root{--primary-50:#eef2ff;--primary-100:#e0e7ff;--primary-200:#c7d2fe;--primary-300:#a5b4fc;--primary-400:#818cf8;--primary-500:#6366f1;--primary-600:#4f46e5;--primary-700:#4338ca;--accent-400:#2dd4bf;--accent-500:#14b8a6;--accent-600:#0d9488;--rose-400:#fb7185;--rose-500:#f43f5e;--amber-400:#fbbf24;--amber-500:#f59e0b;--sky-400:#38bdf8;--sky-500:#0ea5e9;--emerald-400:#34d399;--emerald-500:#10b981;--bg-primary:#f8fafc;--bg-secondary:#f1f5f9;--bg-tertiary:#e2e8f0;--surface:#ffffff;--surface-hover:#f8fafc;--surface-active:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#94a3b8;--border:#e2e8f0;--border-hover:#cbd5e1;--shadow-color:220 60% 2%;--shadow-sm:0 1px 3px hsl(var(--shadow-color)/.08),0 1px 2px hsl(var(--shadow-color)/.06);--shadow-md:0 4px 6px -1px hsl(var(--shadow-color)/.1),0 2px 4px -2px hsl(var(--shadow-color)/.08);--shadow-lg:0 10px 15px -3px hsl(var(--shadow-color)/.12),0 4px 6px -4px hsl(var(--shadow-color)/.08);--shadow-xl:0 20px 25px -5px hsl(var(--shadow-color)/.14),0 8px 10px -6px hsl(var(--shadow-color)/.1);--shadow-glow:0 0 20px hsl(235 80% 60%/.15);--radius-xs:6px;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--transition-fast:150ms cubic-bezier(.4, 0, .2, 1);--transition-normal:250ms cubic-bezier(.4, 0, .2, 1);--transition-slow:350ms cubic-bezier(.4, 0, .2, 1);--transition-bounce:500ms cubic-bezier(.34, 1.56, .64, 1);--max-width:1280px;--header-height:64px}[data-theme=dark]{--bg-primary:#0c0f1a;--bg-secondary:#111827;--bg-tertiary:#1e293b;--surface:#1a1f2e;--surface-hover:#222838;--surface-active:#2a3040;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-tertiary:#64748b;--border:#2d3548;--border-hover:#3d4558;--shadow-color:220 80% 1%;--shadow-sm:0 1px 3px hsl(var(--shadow-color)/.3);--shadow-md:0 4px 6px -1px hsl(var(--shadow-color)/.4);--shadow-lg:0 10px 15px -3px hsl(var(--shadow-color)/.5);--shadow-xl:0 20px 25px -5px hsl(var(--shadow-color)/.6);--shadow-glow:0 0 30px hsl(235 80% 60%/.2)}.header{position:sticky;top:0;z-index:100;background:var(--surface);border-bottom:1px solid var(--border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);height:var(--header-height);transition:background var(--transition-normal),border var(--transition-normal)}[data-theme=dark] .header{background:hsla(225,30%,10%,.85)}.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;letter-spacing:-.02em;color:var(--text-primary);transition:opacity var(--transition-fast)}.logo:hover{opacity:.8}.logo svg{flex-shrink:0}.header-nav{display:flex;gap:4px}.nav-link{padding:8px 16px;border-radius:var(--radius-sm);font-size:.875rem;font-weight:500;color:var(--text-secondary);transition:all var(--transition-fast)}.nav-link.active,.nav-link:hover{color:var(--primary-500);background:var(--primary-50)}[data-theme=dark] .nav-link.active,[data-theme=dark] .nav-link:hover{background:hsla(235,60%,60%,.12)}.header-actions{display:flex;align-items:center;gap:8px}.theme-toggle{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all var(--transition-fast)}.theme-toggle:hover{background:var(--bg-secondary);color:var(--text-primary)}[data-theme=light] .icon-moon{display:none}[data-theme=dark] .icon-sun{display:none}.mobile-menu-btn{display:none;width:40px;height:40px;border-radius:var(--radius-sm);align-items:center;justify-content:center;color:var(--text-secondary)}.hero{padding:60px 24px 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var(--border);border-radius:var(--radius-lg);font-size:1rem;background:var(--surface);color:var(--text-primary);transition:all var(--transition-fast);outline:0}.search-input:focus{border-color:var(--primary-400);box-shadow:0 0 0 4px hsla(235,80%,60%,.12)}.search-input::placeholder{color:var(--text-tertiary)}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-tertiary);pointer-events:none}.search-clear{position:absolute;right:12px;top:50%;transform:translateY(-50%);width:28px;height:28px;border-radius:var(--radius-xs);display:none;align-items:center;justify-content:center;color:var(--text-tertiary);transition:all var(--transition-fast)}.search-clear:hover{background:var(--bg-secondary);color:var(--text-primary)}.search-clear.visible{display:flex}.search-suggestions{position:absolute;top:calc(100% + 8px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);max-height:320px;overflow-y:auto;z-index:50;display:none}.search-suggestions.visible{display:block}.search-suggestion{padding:12px 16px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:background var(--transition-fast);border-bottom:1px solid var(--border)}.search-suggestion:last-child{border-bottom:none}.search-suggestion:hover{background:var(--surface-hover)}.search-suggestion .suggestion-icon{width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.1rem}.search-suggestion .suggestion-text{flex:1;min-width:0}.search-suggestion .suggestion-name{font-weight:600;font-size:.9rem;color:var(--text-primary)}.search-suggestion .suggestion-cat{font-size:.75rem;color:var(--text-tertiary)}.categories-section{padding:0 0 24px}.categories-scroll{max-width:var(--max-width);margin:0 auto;display:flex;gap:8px;overflow-x:auto;padding:4px 24px;scrollbar-width:none;-ms-overflow-style:none}.categories-scroll::-webkit-scrollbar{display:none}.category-pill{padding:8px 20px;border-radius:var(--radius-full);font-size:.85rem;font-weight:500;white-space:nowrap;border:1.5px solid var(--border);color:var(--text-secondary);transition:all var(--transition-fast);cursor:pointer;flex-shrink:0;display:flex;align-items:center;gap:8px}.category-pill:hover{border-color:var(--primary-300);color:var(--primary-500);background:var(--primary-50)}[data-theme=dark] .category-pill:hover{background:hsla(235,60%,60%,.1)}.category-pill.active{background:var(--primary-500);color:#fff;border-color:var(--primary-500)}.ad-banner,.modal-ad,.sidebar-ad{display:none!important}.ad-banner{max-width:var(--max-width);margin:24px auto;padding:0 24px}.ad-placeholder{background:var(--bg-secondary);border:2px dashed var(--border);border-radius:var(--radius-md);padding:20px;text-align:center;color:var(--text-tertiary);font-size:.8rem;font-weight:500;min-height:90px;display:flex;align-items:center;justify-content:center}.section-header{max-width:var(--max-width);margin:0 auto;padding:32px 24px 16px;display:flex;align-items:center;justify-content:space-between}.section-title{font-size:1.35rem;font-weight:700;letter-spacing:-.01em;color:var(--text-primary)}.section-badge{font-size:.75rem;font-weight:600;padding:4px 10px;border-radius:var(--radius-full);background:var(--primary-50);color:var(--primary-600)}[data-theme=dark] .section-badge{background:hsla(235,60%,60%,.15)}.tools-grid{max-width:var(--max-width);margin:0 auto;padding:0 24px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden;display:flex;flex-direction:column;gap:12px}.tool-card::before{content:'';position:absolute;inset:0;border-radius:inherit;opacity:0;transition:opacity var(--transition-normal);background:linear-gradient(135deg,hsla(235,80%,60%,.04),hsla(280,80%,60%,.04))}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--primary-200)}.tool-card:hover::before{opacity:1}[data-theme=dark] .tool-card:hover{border-color:var(--primary-400);box-shadow:var(--shadow-glow)}.tool-card-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0;transition:transform var(--transition-bounce)}.tool-card:hover .tool-card-icon{transform:scale(1.1)}.tool-card-title{font-size:1rem;font-weight:650;color:var(--text-primary);line-height:1.3}.tool-card-desc{font-size:.825rem;color:var(--text-secondary);line-height:1.5;flex:1}.tool-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:8px}.tool-card-category{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-tertiary)}.tool-card-fav{width:28px;height:28px;border-radius:var(--radius-xs);display:flex;align-items:center;justify-content:center;color:var(--text-tertiary);transition:all var(--transition-fast);z-index:2}.tool-card-fav:hover{color:var(--rose-400);background:hsla(350,80%,60%,.08)}.tool-card-fav.active{color:var(--rose-500)}.cat-time-date{background:hsla(235,80%,60%,.1);color:var(--primary-500)}.cat-math{background:hsla(280,80%,60%,.1);color:#a855f7}.cat-finance{background:hsla(150,80%,40%,.1);color:var(--emerald-500)}.cat-health{background:hsla(350,80%,60%,.1);color:var(--rose-500)}.cat-converters{background:hsla(200,80%,50%,.1);color:var(--sky-500)}.cat-digital{background:hsla(35,90%,50%,.1);color:var(--amber-500)}.cat-real-estate{background:hsla(170,70%,45%,.1);color:var(--accent-500)}.recent-section{max-width:var(--max-width);margin:0 auto;padding:0 24px 16px}.recent-scroll{display:flex;gap:12px;overflow-x:auto;padding:4px 0;scrollbar-width:none}.recent-scroll::-webkit-scrollbar{display:none}.recent-chip{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:var(--radius-full);background:var(--surface);border:1px solid var(--border);font-size:.825rem;font-weight:500;white-space:nowrap;cursor:pointer;transition:all var(--transition-fast);flex-shrink:0}.recent-chip:hover{border-color:var(--primary-300);color:var(--primary-500)}.recent-chip .chip-icon{font-size:1rem}.modal-overlay{position:fixed;inset:0;z-index:200;background:hsla(220,30%,10%,.5);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:20px;opacity:1;transition:opacity var(--transition-fast)}.modal-overlay.hidden{opacity:0;pointer-events:none}.modal{background:var(--surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);width:100%;max-width:640px;max-height:90vh;overflow-y:auto;position:relative;transform:scale(1) translateY(0);transition:transform var(--transition-normal)}.modal-overlay.hidden .modal{transform:scale(.95) translateY(20px)}.modal-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:var(--text-tertiary);transition:all var(--transition-fast);z-index:10}.modal-close:hover{background:var(--bg-secondary);color:var(--text-primary)}.calc-header{padding:32px 32px 0;display:flex;align-items:center;gap:16px}.calc-header-icon{width:52px;height:52px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0}.calc-header-text h2{font-size:1.35rem;font-weight:700;letter-spacing:-.01em;color:var(--text-primary)}.calc-header-text p{font-size:.85rem;color:var(--text-secondary);margin-top:2px}.calc-body{padding:24px 32px 32px}.calc-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:24px}.calc-field{display:flex;flex-direction:column;gap:6px}.calc-field.full-width{grid-column:1/-1}.calc-field 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var(--transition-normal)}.footer-inner{max-width:var(--max-width);margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:40px}.footer-brand p{color:var(--text-secondary);font-size:.875rem;margin-top:8px;max-width:300px}.footer-logo{font-weight:800;font-size:1.2rem;color:var(--text-primary)}.footer-links{display:flex;flex-direction:column;gap:8px}.footer-links h4{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-tertiary);margin-bottom:4px}.footer-links a{font-size:.875rem;color:var(--text-secondary);transition:color var(--transition-fast)}.footer-links a:hover{color:var(--primary-500)}.footer-bottom{border-top:1px solid var(--border);padding:20px 0;text-align:center}.footer-bottom p{font-size:.8rem;color:var(--text-tertiary)}@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes 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.ad-placeholder{min-height:60px;font-size:.75rem}@media(max-width:1100px){.tools-grid{grid-template-columns:repeat(3,1fr)}.content-with-sidebar{grid-template-columns:1fr}.sidebar-ad{display:none}}@media(max-width:768px){.tools-grid{grid-template-columns:repeat(2,1fr)}.header-nav{display:none}.mobile-menu-btn{display:flex}.hero{padding:40px 20px 24px}.hero h1{font-size:1.75rem}.hero p{font-size:.95rem;margin-bottom:24px}.section-header{padding:24px 20px 12px}.tools-grid{padding:0 20px 32px;gap:12px}.footer-inner{grid-template-columns:1fr;gap:24px}.modal{max-width:100%;margin:12px;border-radius:var(--radius-lg)}.calc-header{padding:24px 20px 0}.calc-body{padding:20px}.calc-faq{padding:0 20px 24px}.calc-fields{grid-template-columns:1fr}.categories-scroll{padding:4px 20px}}@media(max-width:480px){.tools-grid{grid-template-columns:1fr}.header-inner{padding:0 16px}.tool-card{padding:20px}.search-container{margin:0 4px}}.mobile-nav{position:fixed;top:var(--header-height);left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);padding:16px 24px;display:none;flex-direction:column;gap:4px;z-index:99;box-shadow:var(--shadow-lg);animation:slideUp .2s ease}.mobile-nav.visible{display:flex}.mobile-nav a{padding:12px 16px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;color:var(--text-secondary);transition:all var(--transition-fast)}.mobile-nav a.active,.mobile-nav a:hover{color:var(--primary-500);background:var(--primary-50)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}.calc-page{max-width:800px;margin:0 auto;padding:32px 24px}.calc-page .back-link{display:inline-flex;align-items:center;gap:6px;font-size:.875rem;font-weight:500;color:var(--text-secondary);margin-bottom:24px;transition:color var(--transition-fast)}.calc-page .back-link:hover{color:var(--primary-500)}.calc-page-header{margin-bottom:32px}.calc-page-header h1{font-size:1.75rem;font-weight:800;letter-spacing:-.02em;margin-bottom:8px}.calc-page-header p{color:var(--text-secondary);font-size:1rem;line-height:1.6}.calc-page .calc-widget{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:32px}.skeleton{background:linear-gradient(90deg,var(--bg-secondary)25%,var(--bg-tertiary)50%,var(--bg-secondary)75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}