*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}:root{--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#dbeafe;--primary-bg:#eff6ff;--bg:#f8fafc;--card:#ffffff;--text:#0f172a;--text-secondary:#475569;--text-light:#94a3b8;--border:#e2e8f0;--shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04);--shadow-lg:0 10px 40px rgba(0,0,0,0.08);--radius:12px;--radius-sm:8px;}html{font-size:16px;scroll-behavior:smooth;}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;}.container{max-width:800px;margin:0 auto;padding:0 20px;width:100%;}.header{background:linear-gradient(135deg,#1e40af,#7c3aed);color:white;padding:0;}.header-top{display:flex;align-items:center;justify-content:space-between;padding:14px 0;}.logo{font-size:1.3rem;font-weight:800;text-decoration:none;color:white;letter-spacing:-0.03em;}.logo span{color:#93c5fd;}.nav-links{display:flex;gap:20px;list-style:none;align-items:center;}.nav-links a{color:rgba(255,255,255,0.85);text-decoration:none;font-size:0.9rem;font-weight:500;transition:color 0.15s;}.nav-links a:hover{color:white;}.lang-switcher{display:flex;gap:3px;margin-left:8px;}.lang-switcher button{background:rgba(255,255,255,0.15);color:white;border:1px solid rgba(255,255,255,0.25);padding:2px 7px;border-radius:4px;font-size:0.68rem;font-weight:700;cursor:pointer;transition:all 0.15s;font-family:inherit;}.lang-switcher button:hover{background:rgba(255,255,255,0.3);}.lang-switcher button.active-lang{background:white;color:#1e40af;border-color:white;}[dir="rtl"] .lang-switcher{margin-left:0;margin-right:8px;}.header-hero{text-align:center;padding:40px 0 36px;}.header-hero h1{font-size:clamp(1.5rem,4vw,2.2rem);font-weight:800;letter-spacing:-0.03em;line-height:1.2;}.header-hero .subtitle{margin-top:8px;font-size:clamp(0.9rem,2vw,1.05rem);opacity:0.9;max-width:600px;margin-left:auto;margin-right:auto;}.breadcrumb{display:flex;gap:6px;align-items:center;padding:12px 0;font-size:0.8rem;color:rgba(255,255,255,0.7);}.breadcrumb a{color:var(--text-secondary);text-decoration:none;}.breadcrumb a:hover{color:var(--primary);text-decoration:underline;}.breadcrumb .sep{opacity:0.5;}.categories{display:flex;gap:6px;margin:24px 0;background:var(--card);padding:6px;border-radius:var(--radius);box-shadow:var(--shadow);flex-wrap:wrap;justify-content:center;}.cat-btn{flex:0 1 auto;padding:10px 14px;border:none;background:transparent;color:var(--text-secondary);font-size:0.82rem;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;transition:all 0.15s;white-space:nowrap;}.cat-btn:hover{background:var(--primary-bg);color:var(--primary);}.cat-btn.active{background:var(--primary);color:white;box-shadow:0 2px 8px rgba(37,99,235,0.25);}.converter-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:28px 24px;margin-bottom:32px;}.category-name{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-light);margin-bottom:16px;}.converter-form{display:flex;flex-direction:column;gap:16px;}.input-group{display:flex;flex-direction:column;gap:5px;}.input-group label{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-light);}.input-group input,.input-group select{padding:14px 16px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:1.05rem;background:var(--bg);color:var(--text);transition:border-color 0.15s;-webkit-appearance:none;appearance:none;width:100%;font-family:inherit;}.input-group input:focus,.input-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);}.input-group select{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-repeat:no-repeat;background-position:right 14px center;padding-right:36px;}.result-group output{padding:14px 16px;border:2px solid var(--primary-light);border-radius:var(--radius-sm);font-size:1.3rem;font-weight:700;background:var(--primary-bg);color:var(--primary);min-height:50px;display:flex;align-items:center;white-space:nowrap;overflow-x:auto;scrollbar-width:thin;}#swap-btn{align-self:center;background:var(--bg);border:2px solid var(--border);border-radius:50%;width:44px;height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-secondary);transition:all 0.15s;flex-shrink:0;}#swap-btn:hover{background:var(--primary-bg);color:var(--primary);border-color:var(--primary);}#swap-btn svg{transition:transform 0.3s;}#swap-btn:hover svg{transform:rotate(180deg);}@media (min-width:640px){.converter-form{display:grid;grid-template-columns:1fr auto 1fr 2fr;grid-template-rows:auto auto;gap:14px;align-items:end;}.input-group:first-child{grid-column:1 / -1;}.input-group:nth-child(2){grid-column:1;}#swap-btn{grid-row:2;grid-column:2;margin-bottom:4px;}.input-group:nth-child(4){grid-column:3;}.result-group{grid-column:4;}}.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px;margin:24px 0 40px;}.cat-grid a{display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px 12px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;color:var(--text);font-weight:600;font-size:0.9rem;transition:all 0.15s;border:2px solid transparent;}.cat-grid a:hover{border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-2px);}.cat-grid .icon{font-size:1.8rem;}.page-content{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 28px;margin:24px 0 40px;}.page-content h1{font-size:1.8rem;margin-bottom:16px;}.page-content h2{font-size:1.3rem;margin:28px 0 12px;color:var(--text);}.page-content h3{font-size:1.1rem;margin:20px 0 8px;}.page-content p{margin-bottom:14px;color:var(--text-secondary);line-height:1.7;}.page-content ul,.page-content ol{margin:0 0 16px 20px;color:var(--text-secondary);}.page-content li{margin-bottom:6px;}.page-content a{color:var(--primary);}.seo-content{margin:32px 0;}.seo-content h2{font-size:1.3rem;margin-bottom:12px;}.seo-content p{color:var(--text-secondary);margin-bottom:12px;line-height:1.7;}.conversion-table{width:100%;border-collapse:collapse;margin:16px 0;font-size:0.9rem;}.conversion-table th{background:var(--primary);color:white;padding:10px 14px;text-align:left;font-weight:600;}.conversion-table th:first-child{border-radius:var(--radius-sm) 0 0 0;}.conversion-table th:last-child{border-radius:0 var(--radius-sm) 0 0;}.conversion-table td{padding:9px 14px;border-bottom:1px solid var(--border);}.conversion-table tr:nth-child(even){background:var(--bg);}.conversion-table tr:hover{background:var(--primary-bg);}.contact-form{max-width:500px;}.contact-form label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:4px;color:var(--text-secondary);}.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border:2px solid var(--border);border-radius:var(--radius-sm);font-size:1rem;font-family:inherit;margin-bottom:16px;transition:border-color 0.15s;}.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary);}.contact-form textarea{min-height:120px;resize:vertical;}.btn{display:inline-block;padding:12px 28px;background:var(--primary);color:white;border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:600;cursor:pointer;transition:background 0.15s;text-decoration:none;}.btn:hover{background:var(--primary-hover);}.blog-grid{display:grid;gap:20px;}.blog-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;border:2px solid transparent;transition:all 0.15s;}.blog-card:hover{border-color:var(--primary);}.blog-card h3{margin-bottom:8px;}.blog-card h3 a{color:var(--text);text-decoration:none;}.blog-card h3 a:hover{color:var(--primary);}.blog-card .meta{font-size:0.8rem;color:var(--text-light);margin-bottom:10px;}.blog-card p{color:var(--text-secondary);font-size:0.9rem;}.footer{margin-top:auto;background:var(--card);border-top:1px solid var(--border);padding:32px 0;}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:24px;margin-bottom:24px;}.footer-col h4{font-size:0.8rem;text-transform:uppercase;letter-spacing:0.05em;color:var(--text-light);margin-bottom:12px;}.footer-col ul{list-style:none;margin:0;}.footer-col ul li{margin-bottom:6px;}.footer-col a{color:var(--text-secondary);text-decoration:none;font-size:0.88rem;}.footer-col a:hover{color:var(--primary);}.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border);color:var(--text-light);font-size:0.82rem;}.menu-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:4px;}.menu-toggle span{width:22px;height:2.5px;background:white;border-radius:2px;transition:0.2s;}@media (max-width:600px){.menu-toggle{display:flex;}.nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:#1e40af;flex-direction:column;padding:16px 20px;gap:12px;z-index:100;}.nav-links.open{display:flex;}.header-top{position:relative;}}@media (max-width:380px){.categories{gap:4px;padding:4px;}.cat-btn{padding:8px 10px;font-size:0.75rem;}.converter-card{padding:20px 14px;}.header-hero{padding:28px 0 24px;}}