:root{--bg: #ffffff;--fg: #1a2230;--muted: #5c6b80;--line: #e6eaf0;--brand: #0e7490;--brand-dark: #0b5a70;--accent: #f59e0b;--tg: #229ed9;--radius: 14px;--maxw: 1080px;--shadow: 0 6px 24px rgba(20, 40, 70, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}img{max-width:100%;display:block}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.muted{color:var(--muted)}.section{padding:56px 0}h1{font-size:clamp(1.8rem,5vw,2.8rem);line-height:1.15;margin:0 0 .4em}h2{font-size:clamp(1.4rem,3.5vw,2rem);margin:0 0 1rem}h3{margin:0 0 .4rem;font-size:1.2rem}.site-header{position:sticky;top:0;z-index:10;background:#ffffffeb;backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;gap:16px;height:60px}.brand{font-weight:800;font-size:1.25rem;color:var(--fg);letter-spacing:-.02em}.brand:hover{text-decoration:none}.nav{display:flex;gap:18px;margin-left:auto}.nav a{color:var(--fg);font-weight:500}.langs{display:flex;gap:4px}.lang{font-size:.8rem;font-weight:700;color:var(--muted);padding:4px 8px;border-radius:8px}.lang.active{background:var(--brand);color:#fff}.lang:hover{text-decoration:none;background:var(--line)}.lang.active:hover{background:var(--brand-dark)}.hero{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);color:#fff;padding:72px 0;text-align:center}.hero h1{margin-bottom:.2em}.hero-tagline{font-size:1.2rem;opacity:.92;margin:0 0 1.6em}.btn{display:inline-flex;align-items:center;gap:.4em;background:#fff;color:var(--fg);border:1px solid var(--line);border-radius:999px;padding:12px 20px;font-weight:600;font-size:.98rem;transition:transform .08s ease,box-shadow .2s ease}.btn:hover{text-decoration:none;box-shadow:var(--shadow);transform:translateY(-1px)}.btn-primary{background:var(--accent);color:#3a2400;border-color:transparent}.btn-tg{background:var(--tg);color:#fff;border-color:transparent}.grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;color:var(--fg);transition:transform .1s ease,box-shadow .2s ease}.card:hover{text-decoration:none;box-shadow:var(--shadow);transform:translateY(-3px)}.card-img{position:relative;aspect-ratio:4 / 3;background:var(--line)}.card-img img{width:100%;height:100%;object-fit:cover}.badge{position:absolute;bottom:10px;left:10px;background:var(--accent);color:#3a2400;font-weight:700;padding:4px 10px;border-radius:999px;font-size:.85rem}.card-body{padding:16px 18px 18px}.card-link{color:var(--brand);font-weight:600;font-size:.95rem}.card-meta{display:flex;gap:14px;color:var(--muted);font-size:.9rem;margin:0 0 8px}.diff{position:absolute;top:10px;left:10px;font-size:.76rem;font-weight:700;padding:3px 10px;border-radius:999px;color:#fff}.pill{display:inline-block;padding:3px 12px;border-radius:999px;color:#fff;font-weight:700;font-size:.85rem}.diff-easy{background:#16a34a}.diff-medium{background:#d97706}.diff-hard{background:#dc2626}.filters{display:flex;flex-direction:column;gap:10px;margin-bottom:26px}.filter-row{display:flex;flex-wrap:wrap;gap:8px}.chip{border:1px solid var(--line);background:#fff;color:var(--fg);border-radius:999px;padding:7px 14px;font-size:.9rem;font-weight:600;cursor:pointer}.chip:hover{border-color:var(--brand)}.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}.card.hide{display:none}.details-box{display:flex;flex-wrap:wrap;gap:10px 14px;margin:0 0 22px;padding:14px 16px;background:#f6f8fb;border:1px solid var(--line);border-radius:var(--radius)}.details-box .item{font-size:.95rem}.details-box .item strong{color:var(--muted);font-weight:600;margin-right:4px}.book-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.post-cover{width:100%;border-radius:var(--radius);margin:0 0 24px;aspect-ratio:16 / 9;object-fit:cover}.article-body{max-width:70ch;font-size:1.05rem}.article-body p{margin:0 0 1em}.post-meta{color:var(--muted);font-size:.9rem;margin:0 0 18px}.faq-item{border-bottom:1px solid var(--line)}.faq-item summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;font-size:1.02rem;display:flex;justify-content:space-between;gap:12px}.faq-item summary:after{content:"+";color:var(--brand);font-weight:700}.faq-item[open] summary:after{content:"–"}.faq-item p{margin:0 0 16px;color:var(--muted);max-width:72ch}.why{padding:34px 0;background:#f6f8fb;border-bottom:1px solid var(--line)}.why-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}.why-item{display:flex;align-items:center;gap:12px}.why-ico{font-size:1.7rem;flex-shrink:0;line-height:1}.why-item p{margin:0;font-weight:600;font-size:.96rem}.float-btn{position:fixed;bottom:20px;right:20px;z-index:50;width:56px;height:56px;border-radius:50%;background:var(--tg);color:#fff;font-size:1.7rem;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px #00000040}.float-btn:hover{transform:scale(1.08);text-decoration:none}.faq{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line);padding:6px 0}.faq-item summary{cursor:pointer;font-weight:600;font-size:1.05rem;padding:12px 0;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:before{content:"+";color:var(--brand);font-weight:700;margin-right:10px}.faq-item[open] summary:before{content:"–"}.faq-item p{margin:0 0 14px;color:var(--muted);max-width:72ch}@media(max-width:520px){.float-btn{width:52px;height:52px;bottom:16px;right:16px}}.contact{background:#f6f8fb;border-top:1px solid var(--line);padding:56px 0}.contact-grid{display:grid;gap:12px;margin-top:22px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.contact-grid .btn{justify-content:center}.site-footer{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:.9rem}.footer-inner{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between}.footer-links{display:flex;gap:18px;flex-wrap:wrap}.footer-links a{color:var(--muted)}.footer-cats{display:flex;flex-wrap:wrap;gap:16px;padding-bottom:14px;margin-bottom:14px;border-bottom:1px solid var(--line)}.footer-cats a{color:var(--muted);font-size:.9rem;font-weight:600}.footer-cats a:hover{color:var(--brand)}.tour{padding:40px 0}.back{display:inline-block;margin-bottom:14px;font-weight:600}.tour-meta{display:flex;gap:22px;flex-wrap:wrap;color:var(--muted);margin:0 0 20px}.prose{white-space:pre-wrap;font-size:1.05rem;max-width:70ch}.cta-row{margin-top:32px}.carousel{position:relative;border-radius:var(--radius);overflow:hidden;background:#0a0f17;margin-bottom:26px}.slides{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;-webkit-overflow-scrolling:touch}.slides::-webkit-scrollbar{display:none}.slide{flex:0 0 100%;scroll-snap-align:center}.slide img{width:100%;height:min(72vh,600px);object-fit:contain;display:block}.cnav{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border:none;border-radius:50%;background:#00000073;color:#fff;font-size:1.7rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}.cnav:hover{background:#000000b8}.cnav.prev{left:10px}.cnav.next{right:10px}.dots{position:absolute;bottom:12px;left:0;right:0;display:flex;gap:6px;justify-content:center}.dot{width:8px;height:8px;padding:0;border:none;border-radius:50%;background:#ffffff8c;cursor:pointer;transition:width .2s}.dot.active{background:#fff;width:22px;border-radius:4px}@media(max-width:520px){.cnav{width:38px;height:38px;font-size:1.4rem}}@media(max-width:520px){.nav{display:none}.header-inner{gap:10px}}