/* Kakox Oopbuy Spreadsheet — Compact, Performance-first */
:root{
  --primary:#2563EB; --secondary:#1D4ED8; --accent:#06B6D4;
  --bg:#F8FAFF; --surface:#FFFFFF; --text:#0F172A; --muted:#64748B;
  --border:#DBEAFE; --b2:#f1f5f9; --radius:12px;
  --header-h:56px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;color:var(--text);background:var(--bg);line-height:1.6}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--secondary)}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 16px}
@media(min-width:640px){.container{padding:0 20px}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:8px;font-weight:600;font-size:14px;transition:all .2s;border:1px solid transparent;cursor:pointer;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--secondary);transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.25)}
.btn-secondary{background:var(--surface);color:var(--primary);border-color:var(--border)}
.btn-secondary:hover{background:var(--bg)}
.btn-accent{background:var(--accent);color:#fff}
.btn-ghost{background:transparent;color:var(--text)}
.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.02em}
.badge-accent{background:var(--accent);color:#fff}
.badge-muted{background:var(--b2);color:var(--muted)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:0 8px 24px rgba(15,23,42,.08);transform:translateY(-2px)}
.header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--header-h)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:#0F172A;letter-spacing:-.02em}
.logo img{width:32px;height:32px;border-radius:8px;background:#fff;object-fit:contain;display:block}
.nav{display:none;gap:4px}
@media(min-width:1024px){.nav{display:flex}}
.nav a{padding:8px 10px;border-radius:8px;color:#0F172A;font-weight:500;font-size:14px}
.nav a:hover{background:var(--bg);color:var(--primary)}
.nav a.active{background:var(--bg);color:var(--primary)}
.hamburger{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:8px;border:1px solid var(--border);background:#fff;color:#0F172A}
@media(min-width:1024px){.hamburger{display:none}}
.desktop-cta{display:none}
@media(min-width:1024px){.desktop-cta{display:inline-flex}}
.search{position:relative;flex:1;max-width:520px}
.search input{width:100%;height:44px;padding:0 40px 0 14px;border:1px solid var(--border);border-radius:999px;background:#fff;font-size:14px;outline:none}
.search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.search button{position:absolute;right:4px;top:4px;width:36px;height:36px;border-radius:999px;border:none;background:var(--primary);color:#fff;display:grid;place-items:center}
.hero{display:grid;gap:20px;padding:20px 0 12px}
@media(min-width:1024px){.hero{grid-template-columns:1.1fr .9fr;align-items:center;padding:28px 0 16px}}
.hero h1{font-size:32px;line-height:1.2;margin:0;letter-spacing:-.02em}
@media(min-width:640px){.hero h1{font-size:40px}}
.hero h1 span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);margin:8px 0 0;font-size:15px}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.hero-visual{position:relative;background:linear-gradient(135deg,#EFF6FF,#F0F9FF);border:1px solid var(--border);border-radius:16px;padding:12px;display:grid;grid-template-columns:1fr 1fr;gap:10px}
.hero-visual img{border-radius:10px;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;background:#fff;border:1px solid var(--border);display:block}
.section{padding:16px 0}
.section-tight{padding:10px 0}
.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:12px}
.section-title h2{margin:0;font-size:22px;letter-spacing:-.01em}
.section-title p{margin:0;color:var(--muted);font-size:13px}
.kpi{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.grid{display:grid;gap:12px}
.grid-cats{grid-template-columns:repeat(2,1fr)}
@media(min-width:640px){.grid-cats{grid-template-columns:repeat(4,1fr)}}
@media(min-width:1024px){.grid-cats{grid-template-columns:repeat(8,1fr)}}
.cat{padding:14px 10px;text-align:center}
.cat-icon{width:48px;height:48px;margin:0 auto 8px;border-radius:999px;background:var(--bg);display:grid;place-items:center;font-size:22px;border:1px solid var(--border)}
.cat h3{margin:0;font-size:13px}
.cat span{font-size:11px;color:var(--muted)}
.grid-products{grid-template-columns:1fr}
@media(min-width:640px){.grid-products{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid-products{grid-template-columns:repeat(4,1fr)}}
.product{cursor:pointer}
.product img{aspect-ratio:1/1;object-fit:cover;width:100%;background:#fff}
.product-body{padding:10px}
.product h3{margin:0;font-size:13px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:36px}
.product-meta{display:flex;align-items:center;justify-content:space-between;margin-top:8px;gap:8px}
.price{font-weight:800;font-size:14px}
.price small{font-weight:600;color:var(--muted);font-size:11px}
.tag{font-size:10px;padding:2px 6px;border-radius:999px;background:var(--b2);color:var(--muted);border:1px solid var(--border)}
.agents-table{width:100%;border-collapse:collapse;font-size:13px}
.agents-table th{ text-align:left;padding:10px;border-bottom:1px solid var(--border);color:var(--muted);font-weight:600;font-size:11px;letter-spacing:.04em;text-transform:uppercase}
.agents-table td{padding:10px;border-bottom:1px solid var(--border);vertical-align:middle}
.agents-table tr.recommended{background:#EFF6FF}
.score{font-weight:800;color:var(--primary)}
.agent-cards{display:grid;gap:10px;grid-template-columns:1fr}
@media(min-width:640px){.agent-cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:768px){.agent-cards{display:grid;grid-template-columns:repeat(2,1fr)}}
.table-wrap{display:none}
@media(min-width:768px){.table-wrap{display:block}}
.guide-grid{grid-template-columns:1fr}
@media(min-width:640px){.guide-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.guide-grid{grid-template-columns:repeat(3,1fr)}}
.guide h3{margin:0 0 6px;font-size:14px;line-height:1.4}
.guide p{margin:0;color:var(--muted);font-size:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.faq{max-width:900px;margin:0 auto}
.faq details{border:1px solid var(--border);border-radius:10px;background:#fff;margin-bottom:8px}
.faq summary{list-style:none;padding:12px 14px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq details[open] summary{border-bottom:1px solid var(--border)}
.faq .a{padding:12px 14px;color:var(--muted);font-size:13px}
.footer{background:#0F172A;color:#fff;padding:24px 0 90px}
.footer a{color:#CBD5E1}
.footer a:hover{color:#fff}
.footer-grid{display:grid;gap:20px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.2fr .8fr .8fr .8fr}}
.footer h4{margin:0 0 10px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:#94A3B8}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer ul a{font-size:13px}
.disclaimer{margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:11px;line-height:1.6;color:#94A3B8}
.sticky-cta{position:fixed;left:12px;right:12px;bottom:12px;z-index:30;background:#0F172A;color:#fff;border-radius:999px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
@media(min-width:768px){.sticky-cta{display:none}}
.fab{position:fixed;right:16px;z-index:30;width:44px;height:44px;border-radius:999px;display:grid;place-items:center;background:#0F172A;color:#fff;border:1px solid rgba(255,255,255,.15);box-shadow:0 4px 16px rgba(0,0,0,.2)}
.fab.telegram{bottom:88px}
.fab.top{bottom:144px}
@media(min-width:768px){.fab.telegram{bottom:24px}.fab.top{bottom:80px}}
.modal{position:fixed;inset:0;z-index:50;display:none}
.modal.open{display:grid;place-items:center;padding:16px}
.modal-bg{position:absolute;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(4px)}
.modal-card{position:relative;background:#fff;border-radius:16px;max-width:960px;width:100%;max-height:90vh;overflow:auto;display:grid;gap:0}
@media(min-width:768px){.modal-card{grid-template-columns:1fr 1fr}}
.modal-img{padding:12px}
.modal-img img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:12px;background:#fff;border:1px solid var(--border)}
.thumbs{display:flex;gap:8px;margin-top:10px;overflow:auto}
.thumbs img{width:56px;height:56px;border-radius:8px;border:1px solid var(--border);object-fit:cover;cursor:pointer;opacity:.8}
.thumbs img.active{opacity:1;border-color:var(--primary)}
.modal-body{padding:16px;display:flex;flex-direction:column;gap:12px}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:#0F172A;color:#fff;padding:10px 14px;border-radius:999px;font-size:13px;box-shadow:0 8px 24px rgba(0,0,0,.2);z-index:60;display:none}
.toast.show{display:block;animation:fade .2s}
@keyframes fade{from{opacity:0;transform:translateX(-50%) translateY(8px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
.drawer{position:fixed;inset:0;z-index:45;display:none}
.drawer.open{display:block}
.drawer-bg{position:absolute;inset:0;background:rgba(15,23,42,.45)}
.drawer-panel{position:absolute;right:0;top:0;bottom:0;width:min(88vw,360px);background:#fff;padding:16px;overflow:auto;box-shadow:-8px 0 24px rgba(0,0,0,.12)}
.filter{position:sticky;top:56px;z-index:5;background:var(--bg);padding:10px 0;border-bottom:1px solid var(--border)}
.filter-row{display:flex;gap:8px;overflow:auto;padding-bottom:4px}
.pill{white-space:nowrap;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:12px;font-weight:600;cursor:pointer}
.pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.search-dropdown{position:absolute;top:48px;left:0;right:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 12px 32px rgba(15,23,42,.12);overflow:hidden;z-index:20;display:none}
.search-dropdown.open{display:block}
.search-item{display:flex;gap:10px;padding:10px;border-bottom:1px solid var(--b2);align-items:center}
.search-item img{width:48px;height:48px;border-radius:8px;object-fit:cover;border:1px solid var(--border)}
.search-item h4{margin:0;font-size:13px}
.prose{max-width:760px;margin:0 auto}
.prose h1{font-size:28px}
.prose h2{font-size:20px;margin-top:20px}
.prose p{color:#334155}
.prose table{width:100%;border-collapse:collapse;margin:12px 0}
.prose th,.prose td{border:1px solid var(--border);padding:8px;text-align:left;font-size:13px}
.prose blockquote{border-left:3px solid var(--primary);margin:16px 0;padding:10px 14px;background:#EFF6FF;border-radius:8px;color:#1E40AF;font-size:13px}
.prose ul,.prose ol{padding-left:20px}
.prose li{margin:6px 0;color:#334155;font-size:14px}
.prose pre{background:#0F172A;color:#E2E8F0;padding:12px;border-radius:8px;overflow:auto;font-size:12px}
.prose code{font-family:ui-monospace,Menlo,monospace;background:#F1F5F9;padding:2px 6px;border-radius:4px;font-size:12px}
.reading-progress{position:fixed;top:0;left:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));width:0;z-index:60;transition:width .1s}
.guides-hero{background:linear-gradient(135deg,#EFF6FF 0%,#F0F9FF 50%,#FFFFFF 100%);border:1px solid var(--border);border-radius:16px;padding:20px;margin:16px 0}
.guides-hero h1{margin:0;font-size:24px}
@media(min-width:640px){.guides-hero h1{font-size:28px}}
.guides-stats{display:flex;gap:16px;flex-wrap:wrap;margin-top:10px;font-size:12px;color:var(--muted)}
.guides-stats strong{color:var(--text);font-size:14px}
.guide-filters{position:sticky;top:56px;z-index:4;background:var(--bg);padding:10px 0 12px;border-bottom:1px solid var(--border);margin-bottom:12px}
.guide-card{position:relative;display:flex;flex-direction:column;gap:0;padding:0;overflow:hidden}
.guide-card-top{height:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.guide-card-body{padding:14px;display:flex;flex-direction:column;gap:8px;flex:1}
.guide-card:hover .guide-card-title{color:var(--primary)}
.guide-card-title{font-size:15px;line-height:1.4;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.guide-card-excerpt{color:var(--muted);font-size:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
.guide-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center;font-size:11px;color:var(--muted)}
.guide-search{position:relative;max-width:420px}
.guide-search input{width:100%;height:40px;padding:0 36px 0 36px;border:1px solid var(--border);border-radius:999px;background:#fff;font-size:13px}
.guide-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--muted)}
.guide-empty{grid-column:1/-1;text-align:center;padding:40px 20px;color:var(--muted)}
.guide-empty svg{margin:0 auto 12px;opacity:.5}
.article-layout{display:grid;gap:20px;max-width:1100px;margin:0 auto}
@media(min-width:1024px){.article-layout{grid-template-columns:1fr 260px;align-items:start}}
.article-main{min-width:0;background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden}
.article-header{padding:20px 20px 0}
.article-header h1{margin:8px 0 10px;font-size:24px;line-height:1.25}
@media(min-width:640px){.article-header h1{font-size:28px}}
.article-meta{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:12px;color:var(--muted);margin-top:10px}
.article-meta img{width:28px;height:28px;border-radius:50%;background:#EFF6FF;border:1px solid var(--border)}
.article-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}
.article-actions .btn{height:36px;padding:0 12px;font-size:12px}
.article-toc{position:sticky;top:88px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px;max-height:calc(100vh - 100px);overflow:auto}
.article-toc h3{margin:0 0 10px;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.article-toc a{display:block;padding:6px 8px;border-radius:6px;font-size:13px;color:#334155;line-height:1.4}
.article-toc a:hover{background:var(--bg);color:var(--primary)}
.article-toc a.active{background:var(--primary);color:#fff}
.article-toc-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 14px;background:#fff;border:1px solid var(--border);border-radius:10px;font-weight:600;font-size:13px}
@media(min-width:1024px){.article-toc-toggle{display:none}}
.article-toc-panel{display:none;margin-top:10px}
.article-toc-panel.open{display:block}
@media(min-width:1024px){.article-toc-panel{display:block !important}}
.article-content{padding:0 20px 20px}
.article-content .prose{max-width:none}
.related-grid{display:grid;gap:12px;margin-top:16px}
@media(min-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.related-grid{grid-template-columns:repeat(3,1fr)}}
.legal-hero{background:linear-gradient(135deg,#0F172A,#1E293B);color:#fff;border-radius:16px;padding:24px;margin:16px 0}
.legal-hero h1{margin:0;color:#fff}
.legal-hero p{margin:6px 0 0;color:#CBD5E1;font-size:13px}
.legal-layout{display:grid;gap:20px;max-width:1000px;margin:0 auto}
@media(min-width:1024px){.legal-layout{grid-template-columns:220px 1fr}}
.legal-nav{position:sticky;top:88px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:12px;height:fit-content}
.legal-nav a{display:block;padding:8px 10px;border-radius:8px;font-size:13px;color:#334155}
.legal-nav a:hover{background:var(--bg)}
.legal-nav a.active{background:var(--primary);color:#fff}
.legal-content{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px}
.legal-content h2{scroll-margin-top:88px}
.legal-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.tools-grid{display:grid;gap:14px}
@media(min-width:640px){.tools-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.tools-grid{grid-template-columns:repeat(3,1fr)}}
.agents-grid-2{display:grid;gap:14px;grid-template-columns:1fr}
@media(min-width:640px){.agents-grid-2{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.agents-grid-2{grid-template-columns:repeat(2,1fr)}}
.tool-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:10px;transition:box-shadow .2s,transform .2s}
.tool-card:hover{box-shadow:0 8px 24px rgba(15,23,42,.08);transform:translateY(-2px)}
.tool-icon{width:44px;height:44px;border-radius:10px;display:grid;place-items:center;font-size:20px;background:linear-gradient(135deg,#EFF6FF,#DBEAFE);border:1px solid var(--border)}
.tool-card h3{margin:0;font-size:15px}
.tool-card p{margin:0;color:var(--muted);font-size:12px;flex:1}
.tool-input{width:100%;height:38px;padding:0 12px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:13px}
.tool-result{background:#F8FAFF;border:1px solid #DBEAFE;border-radius:8px;padding:10px;font-size:13px;min-height:44px;display:flex;align-items:center}
.tool-result strong{color:var(--primary)}