:root{--font-body:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;--font-heading:'Outfit',sans-serif;--bg-main:#0b0f19;--bg-card:#111827;--bg-card-hover:#1f2937;--bg-input:#0d1322;--text-main:#f3f4f6;--text-muted:#9ca3af;--border:#1f2937;--border-focus:#6366f1;--primary:#6366f1;--primary-hover:#4f46e5;--accent:#8b5cf6;--success:#10b981;--error:#ef4444;--warning:#f59e0b;--shadow:0 10px 25px -5px rgba(0,0,0,0.5);--radius:12px}
[data-theme="light"]{--bg-main:#f8fafc;--bg-card:#ffffff;--bg-card-hover:#f1f5f9;--bg-input:#f8fafc;--text-main:#0f172a;--text-muted:#64748b;--border:#e2e8f0;--border-focus:#6366f1;--primary:#4f46e5;--primary-hover:#4338ca;--accent:#7c3aed;--success:#059669;--error:#dc2626;--warning:#d97706;--shadow:0 10px 25px -5px rgba(0,0,0,0.08)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);background:var(--bg-main);color:var(--text-main);line-height:1.6;overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,15,25,0.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
[data-theme="light"] .site-header{background:rgba(255,255,255,0.9)}
.nav-container{max-width:1240px;margin:0 auto;padding:0 20px;height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-heading);font-weight:700;font-size:1.25rem;color:var(--text-main)}
.brand-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;box-shadow:0 4px 12px rgba(99,102,241,0.35)}
.brand span{background:linear-gradient(135deg,#fff,#9ca3af);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
[data-theme="light"] .brand span{background:linear-gradient(135deg,#0f172a,#4f46e5);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:24px;list-style:none}
.nav-item{position:relative}
.nav-link{font-weight:500;font-size:0.95rem;color:var(--text-muted);display:flex;align-items:center;gap:6px;padding:8px 0}
.nav-link:hover,.nav-link.active{color:var(--primary)}
.dropdown-menu{position:absolute;top:100%;left:0;min-width:280px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:8px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);transition:all .2s ease;z-index:110;max-height:420px;overflow-y:auto}
.nav-item:hover .dropdown-menu,.nav-item:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-item{display:block;padding:8px 12px;font-size:0.875rem;color:var(--text-muted);border-radius:6px}
.dropdown-item:hover{background:var(--bg-card-hover);color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:12px}
.theme-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-main);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease}
.theme-btn:hover{border-color:var(--primary);color:var(--primary)}
.mobile-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--text-main);align-items:center;justify-content:center;cursor:pointer}
.main-wrapper{flex:1}
.breadcrumbs{max-width:1240px;margin:20px auto 0;padding:0 20px}
.breadcrumb-list{display:flex;align-items:center;gap:8px;list-style:none;font-size:0.875rem;color:var(--text-muted);flex-wrap:wrap}
.breadcrumb-item a{color:var(--text-muted)}
.breadcrumb-item a:hover{color:var(--primary)}
.breadcrumb-separator{color:var(--border)}
.breadcrumb-item.active{color:var(--text-main);font-weight:500}
.hero{padding:40px 20px 20px;max-width:1240px;margin:0 auto;text-align:center}
.badge-pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:rgba(99,102,241,0.12);border:1px solid rgba(99,102,241,0.3);color:var(--primary);border-radius:50px;font-size:0.85rem;font-weight:600;margin-bottom:16px}
.hero-title{font-family:var(--font-heading);font-size:clamp(2rem,4vw,3.2rem);font-weight:800;letter-spacing:-0.03em;line-height:1.15;margin-bottom:16px}
.hero-title .highlight{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{max-width:760px;margin:0 auto 28px;font-size:1.1rem;color:var(--text-muted)}
.converter-box{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);margin-bottom:48px;overflow:hidden}
.converter-toolbar{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--border);background:var(--bg-main);gap:16px;flex-wrap:wrap}
.toolbar-group{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.toolbar-label{font-size:0.85rem;font-weight:600;color:var(--text-muted)}
.select-input{background:var(--bg-card);border:1px solid var(--border);color:var(--text-main);padding:6px 12px;border-radius:8px;font-size:0.85rem;outline:none;cursor:pointer}
.select-input:focus{border-color:var(--border-focus)}
.switch-label{display:inline-flex;align-items:center;gap:8px;font-size:0.85rem;color:var(--text-muted);cursor:pointer;user-select:none}
.switch-input{appearance:none;width:36px;height:20px;background:var(--border);border-radius:20px;position:relative;cursor:pointer;outline:none;transition:background .2s}
.switch-input:checked{background:var(--primary)}
.switch-input::before{content:'';position:absolute;width:14px;height:14px;border-radius:50%;top:3px;left:3px;background:#fff;transition:transform .2s}
.switch-input:checked::before{transform:translateX(16px)}
.converter-grid{display:grid;grid-template-columns:1fr 1fr;min-height:540px}
.panel{display:flex;flex-direction:column;border-right:1px solid var(--border)}
.panel:last-child{border-right:none}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;background:var(--bg-card);border-bottom:1px solid var(--border)}
.panel-title{font-family:var(--font-heading);font-weight:600;font-size:0.95rem;display:flex;align-items:center;gap:8px;color:var(--text-main)}
.panel-actions{display:flex;align-items:center;gap:8px}
.btn-sm{padding:5px 10px;font-size:0.8rem;border-radius:6px;border:1px solid var(--border);background:var(--bg-main);color:var(--text-muted);cursor:pointer;display:inline-flex;align-items:center;gap:5px;transition:all .2s}
.btn-sm:hover{color:var(--text-main);border-color:var(--text-muted);background:var(--bg-card-hover)}
.editor-container{position:relative;flex:1;display:flex}
.code-editor{flex:1;width:100%;height:100%;min-height:420px;padding:16px;background:var(--bg-input);color:var(--text-main);font-family:'Courier New',Courier,monospace;font-size:0.9rem;border:none;resize:none;outline:none;line-height:1.5}
.code-editor::placeholder{color:var(--text-muted);opacity:0.6}
.panel-footer{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;border-top:1px solid var(--border);background:var(--bg-main);font-size:0.8rem;color:var(--text-muted)}
.stats-badge{background:var(--bg-card);padding:3px 8px;border-radius:4px;border:1px solid var(--border)}
.validation-bar{padding:10px 18px;font-size:0.85rem;display:flex;align-items:center;gap:8px;border-top:1px solid var(--border);background:rgba(16,185,129,0.08);color:var(--success)}
.validation-bar.has-error{background:rgba(239,68,68,0.1);color:var(--error);border-color:rgba(239,68,68,0.3)}
.converter-action-strip{display:flex;align-items:center;justify-content:center;gap:16px;padding:16px 20px;border-top:1px solid var(--border);background:var(--bg-main)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;border:none;padding:12px 28px;border-radius:10px;font-weight:600;font-size:1rem;cursor:pointer;display:inline-flex;align-items:center;gap:10px;box-shadow:0 4px 14px rgba(99,102,241,0.35);transition:all .2s}
.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 20px rgba(99,102,241,0.45)}
.btn-primary:disabled{opacity:0.5;cursor:not-allowed;transform:none;box-shadow:none}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text-main);padding:11px 20px;border-radius:10px;font-weight:600;font-size:0.95rem;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .2s}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.section{max-width:1240px;margin:0 auto;padding:60px 20px}
.section-header{text-align:center;max-width:700px;margin:0 auto 40px}
.section-subtitle{font-size:0.85rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--primary);margin-bottom:8px}
.section-title{font-family:var(--font-heading);font-size:clamp(1.75rem,3vw,2.4rem);font-weight:700;letter-spacing:-0.02em;margin-bottom:12px}
.section-desc{color:var(--text-muted);font-size:1.05rem}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.tool-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;align-items:center;gap:14px;transition:all .2s}
.tool-card:hover{border-color:var(--primary);transform:translateY(-2px);background:var(--bg-card-hover)}
.tool-icon{width:42px;height:42px;border-radius:10px;background:rgba(99,102,241,0.12);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0}
.tool-name{font-weight:600;font-size:0.95rem;color:var(--text-main);margin-bottom:2px}
.tool-tag{font-size:0.75rem;color:var(--text-muted)}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:all .2s;display:flex;flex-direction:column}
.feature-card:hover{border-color:var(--primary);transform:translateY(-3px)}
.feature-icon-box{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(99,102,241,0.15),rgba(139,92,246,0.15));border:1px solid rgba(99,102,241,0.3);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:18px}
.feature-title{font-family:var(--font-heading);font-size:1.2rem;font-weight:700;margin-bottom:8px}
.feature-text{color:var(--text-muted);font-size:0.925rem;line-height:1.6}
.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.step-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative}
.step-number{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:0.9rem}
.step-title{font-family:var(--font-heading);font-size:1.1rem;font-weight:600;margin-bottom:8px}
.step-desc{color:var(--text-muted);font-size:0.9rem}
.seo-article{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:36px}
.seo-article h3{font-family:var(--font-heading);font-size:1.35rem;font-weight:700;margin:24px 0 10px;color:var(--text-main)}
.seo-article h3:first-child{margin-top:0}
.seo-article p{color:var(--text-muted);margin-bottom:16px;line-height:1.75}
.seo-code-box{background:var(--bg-input);border:1px solid var(--border);border-radius:8px;padding:16px;font-family:'Courier New',Courier,monospace;font-size:0.875rem;color:var(--text-main);margin:16px 0;overflow-x:auto}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-question{width:100%;padding:18px 22px;background:none;border:none;color:var(--text-main);font-family:var(--font-heading);font-size:1.05rem;font-weight:600;display:flex;align-items:center;justify-content:space-between;cursor:pointer;text-align:left}
.faq-chevron{transition:transform .2s ease}
.faq-item.active .faq-chevron{transform:rotate(180deg)}
.faq-answer{padding:0 22px 20px;color:var(--text-muted);font-size:0.95rem;line-height:1.6;display:none}
.faq-item.active .faq-answer{display:block}
.cta-box{background:linear-gradient(135deg,#1e1b4b,#312e81);border:1px solid rgba(99,102,241,0.4);border-radius:20px;padding:48px 30px;text-align:center;box-shadow:var(--shadow)}
[data-theme="light"] .cta-box{background:linear-gradient(135deg,#e0e7ff,#c7d2fe);border-color:#a5b4fc}
.cta-title{font-family:var(--font-heading);font-size:clamp(1.8rem,3vw,2.5rem);font-weight:800;margin-bottom:12px;color:#fff}
[data-theme="light"] .cta-title{color:#1e1b4b}
.cta-desc{font-size:1.1rem;color:#c7d2fe;max-width:680px;margin:0 auto 28px}
[data-theme="light"] .cta-desc{color:#3730a3}
.cta-buttons{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-btn{padding:12px 24px;border-radius:10px;font-weight:600;font-size:0.95rem;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:all .2s}
.cta-btn-primary{background:#fff;color:#1e1b4b}
.cta-btn-primary:hover{background:#f8fafc;transform:translateY(-2px)}
.cta-btn-secondary{background:rgba(255,255,255,0.12);color:#fff;border:1px solid rgba(255,255,255,0.25)}
.cta-btn-secondary:hover{background:rgba(255,255,255,0.2);transform:translateY(-2px)}
[data-theme="light"] .cta-btn-secondary{background:rgba(30,27,75,0.08);color:#1e1b4b;border-color:rgba(30,27,75,0.2)}
.site-footer{background:var(--bg-card);border-top:1px solid var(--border);padding:60px 20px 30px;margin-top:auto}
.footer-container{max-width:1240px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:36px;margin-bottom:48px}
.footer-col-title{font-family:var(--font-heading);font-weight:700;font-size:1rem;margin-bottom:16px;color:var(--text-main);letter-spacing:0.02em}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--text-muted);font-size:0.875rem}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;text-align:center;font-size:0.85rem;color:var(--text-muted);display:flex;flex-direction:column;gap:10px}
.trademark-disclaimer{font-size:0.8rem;color:var(--text-muted);max-width:900px;margin:0 auto;line-height:1.5}
.cookie-banner{position:fixed;bottom:20px;left:20px;right:20px;max-width:480px;background:var(--bg-card);border:1px solid var(--border);border-radius:14px;padding:16px 20px;box-shadow:0 20px 40px rgba(0,0,0,0.4);z-index:9999;display:flex;flex-direction:column;gap:12px;opacity:0;visibility:hidden;transform:translateY(20px);transition:all .3s ease}
.cookie-banner.show{opacity:1;visibility:visible;transform:translateY(0)}
.cookie-text{font-size:0.85rem;color:var(--text-muted);line-height:1.5}
.cookie-text a{color:var(--primary);text-decoration:underline}
.cookie-actions{display:flex;align-items:center;gap:10px}
.cookie-btn-accept{background:var(--primary);color:#fff;border:none;padding:7px 16px;border-radius:6px;font-size:0.8rem;font-weight:600;cursor:pointer}
.cookie-btn-dismiss{background:var(--bg-main);color:var(--text-main);border:1px solid var(--border);padding:7px 16px;border-radius:6px;font-size:0.8rem;cursor:pointer}
@media(max-width:992px){.converter-grid{grid-template-columns:1fr}.panel{border-right:none;border-bottom:1px solid var(--border)}.panel:last-child{border-bottom:none}.nav-links{display:none}.mobile-toggle{display:flex}.nav-links.mobile-active{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--bg-card);border-bottom:1px solid var(--border);padding:16px;gap:12px}.dropdown-menu{position:static;box-shadow:none;border:none;padding-left:12px;opacity:1;visibility:visible;transform:none;max-height:none}}
@media(max-width:640px){.converter-toolbar{flex-direction:column;align-items:stretch}.toolbar-group{justify-content:space-between}.hero{padding:24px 16px 12px}.section{padding:40px 16px}}