@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";:root{--bg-primary: #0a0e1a;--bg-secondary: #111827;--bg-card: rgba(17, 24, 39, .85);--bg-input: rgba(15, 23, 42, .9);--bg-input-focus: rgba(20, 30, 55, 1);--border-subtle: rgba(99, 102, 241, .15);--border-medium: rgba(99, 102, 241, .3);--border-active: rgba(99, 102, 241, .6);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-primary: #6366f1;--accent-secondary: #818cf8;--accent-glow: rgba(99, 102, 241, .4);--accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);--result-highlight: rgba(99, 102, 241, .12);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-full: 9999px;--shadow-card: 0 4px 24px rgba(0, 0, 0, .3), 0 0 0 1px var(--border-subtle);--shadow-input: 0 2px 8px rgba(0, 0, 0, .2);--shadow-glow: 0 0 30px var(--accent-glow);--transition-fast: .15s ease;--transition-normal: .25s ease;--max-width: 1440px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:72px;-webkit-font-smoothing:antialiased}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;background-image:radial-gradient(ellipse at 20% 0%,rgba(99,102,241,.08) 0%,transparent 60%),radial-gradient(ellipse at 80% 100%,rgba(139,92,246,.06) 0%,transparent 60%)}body.menu-open{overflow:hidden}[dir=rtl]{direction:rtl;text-align:right}.container-wide{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 2rem}a{color:var(--accent-secondary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--text-primary)}.site-header{position:sticky;top:0;z-index:100;backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);background:#0a0e1abf;border-bottom:1px solid var(--border-subtle)}.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 2rem;display:flex;align-items:center;justify-content:space-between;height:56px}.logo{display:flex;align-items:center;gap:.4rem;text-decoration:none;color:var(--text-primary);font-weight:700;font-size:1rem}.logo-icon{font-size:1.2rem}.header-nav{display:flex;gap:1.5rem;align-items:center}.nav-link{color:var(--text-secondary);text-decoration:none;font-size:.82rem;font-weight:500;transition:color var(--transition-fast);position:relative}.nav-link:hover{color:var(--text-primary)}.nav-link:after{content:"";position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--accent-gradient);border-radius:2px;transition:width var(--transition-normal)}.nav-link:hover:after{width:100%}.mobile-menu-btn{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:background var(--transition-fast)}.mobile-menu-btn:hover{background:#ffffff1a}.hamburger-icon{display:block}.close-icon,.mobile-menu-btn[aria-expanded=true] .hamburger-icon{display:none}.mobile-menu-btn[aria-expanded=true] .close-icon{display:block}.mobile-menu{display:none;position:fixed;inset:56px 0 0;z-index:99;background:#0a0e1af2;backdrop-filter:blur(20px);padding:2rem;flex-direction:column;gap:.5rem;overflow-y:auto}.mobile-menu[aria-hidden=false]{display:flex}.mobile-nav-link{display:block;padding:.85rem 1rem;color:var(--text-secondary);text-decoration:none;font-size:1rem;font-weight:500;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.mobile-nav-link:hover{color:var(--text-primary);background:#6366f11a}.lang-switcher{position:relative}.lang-select{appearance:none;-webkit-appearance:none;background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--accent-secondary);font-family:inherit;font-size:.78rem;font-weight:600;padding:6px 28px 6px 10px;cursor:pointer;outline:none;transition:all var(--transition-fast)}.lang-select:hover{border-color:var(--border-medium)}.lang-select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.lang-select option{background:#1e293b;color:var(--text-primary)}.lang-arrow{position:absolute;right:8px;top:50%;transform:translateY(-50%);color:var(--accent-secondary);pointer-events:none;opacity:.7}.calc-page-title{font-size:clamp(1.5rem,3.5vw,2.2rem);font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#f1f5f9,#c7d2fe,#a5b4fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center;padding:1.25rem 0 .25rem}.calc-page-subtitle{text-align:center;color:var(--text-secondary);font-size:.9rem;max-width:700px;margin:0 auto 1rem;line-height:1.6}.calculator-section{padding-bottom:2rem}.calculator-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--shadow-card);backdrop-filter:blur(12px);overflow:hidden}.calc-group{border-bottom:1px solid var(--border-subtle)}.calc-group:last-of-type{border-bottom:none}.group-header{display:flex;align-items:center;gap:.5rem;padding:.85rem 1.5rem 0}.group-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-sm);background:var(--accent-gradient);color:#fff;flex-shrink:0}.group-title{font-size:.92rem;font-weight:600;color:var(--text-primary)}.group-body{padding:.6rem 1.5rem 1rem}.field{margin-bottom:.7rem}.field:last-child{margin-bottom:0}.field-label{display:block;font-size:.72rem;font-weight:500;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.35rem}.select-wrapper{position:relative}.custom-select{width:100%;padding:12px 42px 12px 16px;background:var(--bg-input);border:1px solid var(--border-medium);border-radius:var(--radius-md);color:var(--text-primary);font-family:inherit;font-size:.92rem;font-weight:500;appearance:none;-webkit-appearance:none;cursor:pointer;transition:all var(--transition-fast);outline:none}.custom-select:hover{border-color:var(--border-active)}.custom-select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.select-arrow{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}.radio-group{display:flex;flex-wrap:wrap;gap:.4rem}.radio-label{display:flex;align-items:center;gap:.5rem;padding:8px 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16px;background:transparent;border:none;color:var(--text-primary);font-family:Inter,monospace;font-size:1.1rem;font-weight:600;outline:none}.calc-input::placeholder{color:var(--text-muted);font-weight:400}.result-input{color:var(--accent-secondary);font-size:1.15rem;font-weight:700}.density-readonly{color:var(--text-secondary);cursor:default}.calc-input[type=number]::-webkit-outer-spin-button,.calc-input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.calc-input[type=number]{-moz-appearance:textfield}.unit-switcher{position:relative;display:flex;align-items:center;padding:0 10px 0 12px;background:#6366f114;border-left:1px solid var(--border-subtle);cursor:pointer;min-width:60px}[dir=rtl] .unit-switcher{border-left:none;border-right:1px solid var(--border-subtle)}.unit-select{appearance:none;-webkit-appearance:none;background:transparent;border:none;color:var(--accent-secondary);font-family:inherit;font-size:.82rem;font-weight:600;cursor:pointer;outline:none;padding-right:16px;min-width:40px}.unit-select option{background:#1e293b;color:var(--text-primary);font-size:.85rem}.unit-arrow{position:absolute;right:8px;top:50%;transform:translateY(-50%);color:var(--accent-secondary);pointer-events:none;opacity:.7}.calc-actions{display:flex;justify-content:center;padding:.85rem 1.5rem;border-top:1px solid var(--border-subtle)}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:8px 24px;border-radius:var(--radius-full);font-family:inherit;font-size:.82rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);border:none}.btn-reset{background:transparent;color:var(--text-secondary);border:1px solid 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h3{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--accent-secondary);margin-bottom:1rem}.formula{display:flex;align-items:center;justify-content:center;gap:.75rem;flex-wrap:wrap;margin-bottom:1rem}.formula-part{padding:10px 20px;background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-size:.95rem;font-weight:600;color:var(--text-primary)}.formula-part.result{background:var(--result-highlight);border-color:var(--accent-primary);color:var(--accent-secondary)}.formula-op{font-size:1.1rem;font-weight:700;color:var(--text-muted)}.formula-example{color:var(--text-secondary);font-size:.88rem}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}.step-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.75rem;text-align:center;transition:all var(--transition-normal)}.step-card:hover{border-color:var(--border-medium);transform:translateY(-4px);box-shadow:0 8px 30px #0003}.step-number{width:44px;height:44px;border-radius:50%;background:var(--accent-gradient);color:#fff;font-size:1.1rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto .85rem}.step-card h3{font-size:1rem;font-weight:600;margin-bottom:.5rem}.step-card p{color:var(--text-secondary);font-size:.85rem;line-height:1.6}.content-section{padding:3rem 0}.content-article{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:2.5rem 3rem;box-shadow:var(--shadow-card)}.content-article h2{font-size:clamp(1.2rem,2.5vw,1.6rem);font-weight:700;margin-bottom:1rem;letter-spacing:-.02em}.content-article h3{font-size:1.05rem;font-weight:600;margin-top:1.5rem;margin-bottom:.5rem;color:var(--accent-secondary)}.content-article p{color:var(--text-secondary);line-height:1.8;margin-bottom:.75rem;font-size:.92rem}.content-article ul{color:var(--text-secondary);padding-left:1.5rem;margin-bottom:1rem}.content-article ul li{margin-bottom:.4rem;line-height:1.7;font-size:.9rem}.content-article strong{color:var(--text-primary)}.table-section{padding:3.5rem 0}.table-scroll{overflow-x:auto;border-radius:var(--radius-lg);border:1px solid var(--border-subtle)}.conversion-table{width:100%;border-collapse:collapse;font-size:.88rem}.conversion-table thead th{background:#6366f11a;padding:14px 20px;text-align:left;font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--accent-secondary);border-bottom:1px solid var(--border-subtle);white-space:nowrap}[dir=rtl] .conversion-table thead th{text-align:right}.conversion-table tbody td{padding:12px 20px;border-bottom:1px solid var(--border-subtle);color:var(--text-secondary);white-space:nowrap}.conversion-table tbody tr:last-child td{border-bottom:none}.conversion-table tbody tr:hover td{background:#6366f10d;color:var(--text-primary)}.conversion-table tbody td:first-child{font-weight:500;color:var(--text-primary)}.faq-section{padding:3.5rem 0}.faq-list{display:flex;flex-direction:column;gap:.5rem}.faq-item{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);overflow:hidden;transition:all var(--transition-fast)}.faq-item:hover{border-color:var(--border-medium)}.faq-item[open]{border-color:var(--accent-primary);box-shadow:0 0 0 1px var(--accent-glow)}.faq-question{padding:1.1rem 1.25rem;cursor:pointer;font-weight:600;font-size:.92rem;color:var(--text-primary);list-style:none;display:flex;align-items:center;justify-content:space-between;user-select:none}.faq-question::-webkit-details-marker{display:none}.faq-question::marker{content:""}.faq-question:after{content:"+";font-size:1.3rem;font-weight:300;color:var(--text-muted);flex-shrink:0;margin-left:.75rem;transition:color var(--transition-fast)}[dir=rtl] .faq-question:after{margin-left:0;margin-right:.75rem}.faq-item[open] .faq-question:after{content:"−";color:var(--accent-primary)}.faq-answer{padding:0 1.25rem 1.1rem;color:var(--text-secondary);font-size:.88rem;line-height:1.7;animation:fadeIn var(--transition-normal) ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.contact-form{display:flex;flex-direction:column;gap:1rem}.form-field label{display:block;font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);margin-bottom:.4rem}.form-field input,.form-field textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border-medium);border-radius:var(--radius-md);color:var(--text-primary);font-family:inherit;font-size:.92rem;outline:none;transition:all var(--transition-fast)}.form-field input:focus,.form-field textarea:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.form-field textarea{min-height:140px;resize:vertical}.form-status{font-size:.85rem;padding:.5rem 0;min-height:1.5rem}.form-status.success{color:#34d399}.form-status.error{color:#f87171}.form-status.sending{color:var(--accent-secondary)}.form-fallback{font-size:.82rem;color:var(--text-muted);margin-top:.5rem}.form-fallback a{color:var(--accent-secondary)}.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.25rem;margin-bottom:2rem}.blog-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition-normal)}.blog-card:hover{border-color:var(--border-medium);transform:translateY(-4px);box-shadow:0 8px 30px #0003}.blog-card-image{width:100%;aspect-ratio:16/9;object-fit:cover;border-bottom:1px solid var(--border-subtle)}.blog-card-body{padding:1.25rem}.blog-card-body h3{font-size:1rem;font-weight:600;margin-bottom:.5rem}.blog-card-body h3 a{color:var(--text-primary);text-decoration:none}.blog-card-body h3 a:hover{color:var(--accent-secondary)}.blog-card-body p{color:var(--text-secondary);font-size:.85rem;line-height:1.6;margin-bottom:.75rem}.blog-card-cta{display:inline-flex;align-items:center;gap:.3rem;font-size:.82rem;font-weight:600;color:var(--accent-secondary)}.pagination{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:2rem 0}.page-link{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 8px;border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--border-subtle);color:var(--text-secondary);font-size:.85rem;font-weight:500;text-decoration:none;transition:all var(--transition-fast)}.page-link:hover{border-color:var(--border-medium);color:var(--text-primary)}.page-link.active{background:var(--accent-gradient);color:#fff;border-color:transparent}.page-link.disabled{opacity:.4;pointer-events:none}.results-meta{text-align:center;color:var(--text-muted);font-size:.82rem;margin-bottom:1rem}.blog-hero{text-align:center;padding:2rem 0}.blog-hero h1{font-size:clamp(1.5rem,3.5vw,2.2rem);font-weight:800;margin-bottom:.5rem}.blog-hero p{color:var(--text-secondary);font-size:.95rem;max-width:700px;margin:0 auto 1.5rem}.blog-hero-image{width:100%;max-height:400px;object-fit:cover;border-radius:var(--radius-lg)}.blog-content{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:2.5rem 3rem;box-shadow:var(--shadow-card)}.blog-content h2{font-size:1.4rem;font-weight:700;margin:2rem 0 .75rem}.blog-content h3{font-size:1.1rem;font-weight:600;margin:1.5rem 0 .5rem;color:var(--accent-secondary)}.blog-content p{color:var(--text-secondary);font-size:.92rem;line-height:1.8;margin-bottom:1rem}.blog-content ul,.blog-content ol{color:var(--text-secondary);padding-left:1.5rem;margin-bottom:1rem}.blog-content li{margin-bottom:.4rem;line-height:1.7}.blog-content strong{color:var(--text-primary)}.blog-content code{background:var(--bg-input);padding:2px 6px;border-radius:4px;font-size:.88rem}.page-section{padding:3rem 0}.page-section h1{font-size:clamp(1.5rem,3.5vw,2.2rem);font-weight:800;text-align:center;margin-bottom:1rem}.page-section .page-desc{text-align:center;color:var(--text-secondary);max-width:700px;margin:0 auto 2rem}.not-found-section{text-align:center;padding:6rem 2rem}.not-found-section h1{font-size:5rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:1rem}.not-found-section p{color:var(--text-secondary);font-size:1rem;margin-bottom:2rem;max-width:500px;margin-inline:auto}.sitemap-list{list-style:none;padding:0}.sitemap-list li{padding:.4rem 0}.sitemap-list a{color:var(--accent-secondary);font-size:.92rem}.sitemap-list a:hover{color:var(--text-primary)}.sitemap-group{margin-bottom:2rem}.sitemap-group h3{font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:.5rem}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:44px;height:44px;border-radius:50%;background:var(--accent-gradient);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:all var(--transition-normal);box-shadow:0 4px 16px #6366f166;z-index:50}.back-to-top.visible{opacity:1;pointer-events:auto}.back-to-top:hover{transform:translateY(-3px);box-shadow:0 6px 24px #6366f199}[dir=rtl] .back-to-top{right:auto;left:2rem}.site-footer{padding:3rem 0 0;border-top:1px solid var(--border-subtle);margin-top:2rem}.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem;padding-bottom:2rem;border-bottom:1px solid var(--border-subtle)}.footer-brand .logo{margin-bottom:.75rem}.footer-desc{color:var(--text-secondary);font-size:.82rem;line-height:1.7;max-width:400px}.footer-links h3{font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-secondary);margin-bottom:.75rem}.footer-links nav{display:flex;flex-direction:column;gap:.4rem}.footer-links nav a{color:var(--text-secondary);text-decoration:none;font-size:.82rem;transition:color var(--transition-fast)}.footer-links nav a:hover{color:var(--text-primary)}.footer-bottom{padding:1.25rem 0;text-align:center;color:var(--text-muted);font-size:.75rem}.footer-bottom p{margin:0}.lang-pills-section{padding:1.5rem 0;border-top:1px solid 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