:root{
  --primary:#515f80; --secondary:#ff8f00; --tertiary:#2a78ff;
  --neutral:#121212; --surface:#ffffff; --border:#f0f0f0; --error:#d92d20;
  --r-none:0px; --r-sm:4px; --r-md:8px; --r-lg:10px; --r-xl:24px; --r-full:9999px;
  --s-xs:2px; --s-sm:10px; --s-md:18px; --s-lg:30px; --s-xl:56px;
  --serif:"Times New Roman", ui-serif, Georgia, serif;
  --sans:"Roboto", sans-serif, system-ui;
  --cta-shadow: rgba(255,144,0,.4) 0px 10px 20px 0px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--neutral);background:var(--surface);line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4,h5{font-family:var(--serif);font-weight:700}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.article-wrap{max-width:820px;margin:0 auto;padding:0 24px}

.btn{display:inline-flex;align-items:center;justify-content:center;cursor:pointer;text-decoration:none;transition:transform .12s, box-shadow .2s, background .2s}
.btn-primary{background:var(--secondary);color:#fff;border:1px solid transparent;border-radius:var(--r-md);padding:16px 28px;font-family:var(--sans);font-size:16px;font-weight:500;min-height:50px;box-shadow:var(--cta-shadow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:rgba(255,144,0,.55) 0px 14px 28px 0px}
.btn-secondary{background:transparent;color:#fff;border:1px solid #fff;border-radius:var(--r-sm);padding:18px 28px;font-family:var(--serif);font-size:18px;font-weight:500;min-width:200px;min-height:55px}
.btn-secondary:hover{background:rgba(255,255,255,.12)}
.btn-link{background:none;border:none;color:#fff;text-decoration:underline;font-family:var(--serif);font-size:16px;padding:0;cursor:pointer}

.site-head{background:linear-gradient(135deg,var(--tertiary) 0%,#1658ac 60%,#0d3d7a 100%);color:#fff}
.topbar{background:linear-gradient(135deg,var(--tertiary),#0d3d7a);color:#fff}
nav.topnav{display:flex;align-items:center;justify-content:space-between;padding:22px 0;position:relative;z-index:20}
.brand{font-family:var(--serif);font-weight:700;font-size:22px;display:flex;align-items:center;gap:8px;text-decoration:none;color:#fff}
.brand .dot{width:30px;height:30px;border-radius:var(--r-full);background:var(--secondary);display:grid;place-items:center;overflow:hidden;font-family:var(--sans);font-weight:700;font-size:15px;color:#fff}
.brand .dot img{width:30px;height:30px;object-fit:cover;border-radius:inherit;display:block}
.navlinks{display:flex;gap:28px;align-items:center}
.navlinks a{font-family:var(--sans);font-weight:500;font-size:16px;text-decoration:none;opacity:.92;color:#fff;transition:opacity .15s}
.navlinks a:hover,.navlinks a.active{opacity:1;text-decoration:underline}
.burger{display:none;font-size:26px;background:none;border:none;color:#fff;cursor:pointer}

.hero{position:relative;background:linear-gradient(135deg,var(--tertiary) 0%,#1658ac 60%,#0d3d7a 100%);color:#fff;padding-bottom:120px;overflow:hidden}
.hero::before{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;background:rgba(255,255,255,.06);border-radius:var(--r-full);pointer-events:none}
.hero::after{content:"";position:absolute;left:-80px;bottom:60px;width:260px;height:260px;background:rgba(255,255,255,.05);border-radius:var(--r-full);pointer-events:none}
.hero-grid{position:relative;z-index:5;display:grid;grid-template-columns:1.15fr .85fr;gap:var(--s-xl);align-items:center;padding-top:40px}
.hero h1{font-size:44px;line-height:1.12;margin-bottom:var(--s-md)}
.hero p.lead{font-family:var(--sans);font-size:18px;line-height:1.6;opacity:.94;max-width:520px;margin-bottom:var(--s-lg)}
.hero-actions{display:flex;gap:var(--s-md);flex-wrap:wrap;align-items:center}
.hero-actions .btn-primary{min-width:275px;min-height:55px;padding:18px 28px;font-size:18px}
.hero-portrait{position:relative;justify-self:center}
.hero-portrait .frame{width:320px;height:320px;border-radius:var(--r-full);background:linear-gradient(160deg,#84acd4,#fff);padding:6px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.hero-portrait .frame img.ph{width:100%;height:100%;border-radius:var(--r-full);object-fit:cover;background:#dfe6f2;display:block}
.badge-author{position:absolute;bottom:10px;left:-20px;background:#fff;color:var(--neutral);border-radius:var(--r-lg);padding:12px 18px;box-shadow:0 10px 30px rgba(0,0,0,.15)}
.badge-author strong{font-family:var(--serif);display:block;font-size:16px}
.badge-author span{font-family:var(--sans);font-size:13px;color:var(--primary)}
.curve{position:absolute;left:0;right:0;bottom:-1px;line-height:0;z-index:4;pointer-events:none}
.curve svg{width:100%;height:90px;display:block;pointer-events:none}

.content{background:var(--surface);position:relative;z-index:2}
section.chips-sec{padding:var(--s-xl) 0 var(--s-lg);position:relative;z-index:2}
.chips{display:flex;flex-wrap:wrap;gap:var(--s-sm);justify-content:center}
.chip{position:relative;z-index:1;touch-action:manipulation;-webkit-tap-highlight-color:rgba(42,120,255,.2);font-family:var(--sans);font-size:14px;background:#fff;border:1px solid var(--border);border-radius:var(--r-full);padding:8px 18px;color:var(--neutral);text-decoration:none;cursor:pointer;transition:border-color .15s,color .15s,background .15s}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.main-grid{display:grid;grid-template-columns:1fr 320px;gap:var(--s-xl);padding-bottom:var(--s-xl);align-items:start}
.section-title{font-size:24px;line-height:1.2;margin-bottom:var(--s-lg)}

.card{background:#fff;color:#000;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;margin-bottom:var(--s-lg);transition:border-color .15s;display:flex;flex-direction:column}
.card:hover{border-color:#dcdcdc}
.card .thumb{width:100%;background:#f4f6fa;display:block;line-height:0}
.card .thumb img{width:100%;height:auto;object-fit:contain;display:block}
.card .body{padding:28px 26px}
.card .meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--primary);margin-bottom:10px}
.card .meta .cat{color:var(--secondary);font-weight:500}
.card h3{font-size:22px;line-height:1.2;margin-bottom:10px}
.card h3 a{text-decoration:none}
.card h3 a:hover{color:var(--tertiary)}
.card p{font-size:16px;line-height:1.6;color:#333;margin-bottom:16px}
.card .readmore{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;font-family:var(--sans);font-size:15px;font-weight:600;color:#fff;text-decoration:none;background:linear-gradient(135deg,var(--tertiary),#1658ac);padding:12px 22px;border-radius:var(--r-md);box-shadow:0 4px 14px rgba(42,120,255,.35);transition:transform .15s, box-shadow .2s, filter .2s}
.card .readmore:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(42,120,255,.45);filter:brightness(1.05);color:#fff}
.card .readmore:active{transform:translateY(0);box-shadow:0 3px 10px rgba(42,120,255,.3)}
.card .readmore::after{content:"→";transition:transform .15s}
.card .readmore:hover::after{transform:translateX(4px)}
.empty-msg{font-family:var(--sans);font-size:16px;color:var(--primary);padding:20px 0}

.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:var(--s-lg)}
.page-btn{min-width:44px;height:44px;padding:0 14px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:#fff;color:var(--neutral);border-radius:var(--r-md);font-family:var(--sans);font-size:15px;font-weight:500;cursor:pointer;touch-action:manipulation;transition:transform .12s,border-color .15s,color .15s,box-shadow .2s}
.page-btn:hover:not(:disabled):not(.active){border-color:var(--tertiary);color:var(--tertiary);transform:translateY(-2px)}
.page-btn.active{background:linear-gradient(135deg,var(--tertiary),#1658ac);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(42,120,255,.35)}
.page-btn:disabled{opacity:.4;cursor:not-allowed}
.page-dots{min-width:20px;display:inline-flex;align-items:center;justify-content:center;color:var(--primary)}

aside{align-self:start;position:sticky;top:20px}
aside .box{background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:28px 24px;margin-bottom:var(--s-lg)}
aside h4{font-size:18px;margin-bottom:var(--s-md)}
.poplist{list-style:none}
.poplist li{padding:14px 0;border-bottom:1px solid var(--border)}
.poplist li:last-child{border-bottom:none}
.poplist a{font-family:var(--serif);font-size:16px;text-decoration:none;line-height:1.3}
.poplist a:hover{color:var(--tertiary)}

.article-grid{display:grid;grid-template-columns:1fr 320px;gap:var(--s-xl);padding:var(--s-xl) 0;align-items:start}
.back-link{display:inline-flex;align-items:center;gap:8px;margin-bottom:var(--s-md);font-family:var(--sans);font-size:15px;font-weight:600;color:var(--tertiary);text-decoration:none;background:#eef3ff;border:1px solid #d8e4ff;padding:10px 20px;border-radius:var(--r-full);transition:transform .18s, box-shadow .2s, background .2s, color .2s, border-color .2s}
.back-link .arrow{transition:transform .18s}
.back-link:hover{background:linear-gradient(135deg,var(--tertiary),#1658ac);color:#fff;border-color:transparent;box-shadow:0 6px 18px rgba(42,120,255,.35)}
.back-link:hover .arrow{transform:translateX(-4px)}
.back-link:active{transform:translateY(1px)}
.art-cat{display:inline-block;color:var(--secondary);font-weight:500;font-size:14px;margin-bottom:10px}
.art-title{font-size:38px;line-height:1.15;margin-bottom:14px}
.art-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--primary);font-size:14px;margin-bottom:var(--s-lg)}
.art-cover{width:100%;border-radius:var(--r-lg);overflow:hidden;margin-bottom:var(--s-lg);background:linear-gradient(140deg,#84acd4,#515f80);min-height:260px}
.art-cover img{width:100%;max-height:440px;object-fit:cover}
.art-body{font-size:17px;line-height:1.75;color:#222}
.art-body h2{font-size:26px;margin:var(--s-lg) 0 12px}
.art-body h3{font-size:21px;margin:var(--s-md) 0 10px}
.art-body p{margin-bottom:16px}
.art-body ul,.art-body ol{margin:0 0 16px 22px}
.art-body li{margin-bottom:8px}
.art-body blockquote{border-left:4px solid var(--secondary);background:#fff8ec;padding:14px 18px;margin:18px 0;font-style:italic;border-radius:0 var(--r-md) var(--r-md) 0}
.art-body img{border-radius:var(--r-lg);margin:18px 0}
.not-found{text-align:center;padding:80px 0}
.not-found h1{font-size:30px;margin-bottom:12px}

.page-head{padding:50px 0 60px;text-align:center;color:#fff}
.page-head h1{font-size:40px;margin-bottom:10px}
.page-head p{opacity:.92;font-size:18px}
.page-body{padding:56px 0}
.page-body h2{font-size:24px;margin:36px 0 14px}
.page-body p{font-size:16px;color:#333;margin-bottom:14px;line-height:1.7}
.page-body ul{margin:0 0 16px 22px}
.page-body li{margin-bottom:8px;color:#333;line-height:1.7}
.page-body a{color:var(--tertiary)}
.page-body a.btn-primary{color:#fff}
.page-body a.btn-primary:hover{color:#fff}

.author-grid{display:grid;grid-template-columns:280px 1fr;gap:var(--s-xl);align-items:start}
.author-photo{width:280px;height:280px;border-radius:var(--r-full);overflow:hidden;background:linear-gradient(160deg,#84acd4,#515f80);box-shadow:0 20px 40px rgba(0,0,0,.12)}
.author-photo img{width:100%;height:100%;object-fit:cover}
.author-text h2{font-size:28px;margin-bottom:16px}
.author-text p{font-size:17px;color:#333;margin-bottom:16px;line-height:1.6}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:40px 0}
.fact{background:#f7f9ff;border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;text-align:center}
.fact strong{display:block;font-family:var(--serif);font-size:32px;color:var(--tertiary)}
.fact span{font-size:14px;color:var(--primary)}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-xl);align-items:start}
.contact-list{list-style:none}
.contact-list li{display:flex;gap:16px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-list .ic{font-size:26px;line-height:1}
.contact-list strong{display:block;font-family:var(--serif);font-size:17px;margin-bottom:2px}
.contact-list a,.contact-list span{color:#444;text-decoration:none}
.contact-list a:hover{color:var(--tertiary)}
.cform{background:#f7f9ff;border:1px solid var(--border);border-radius:var(--r-lg);padding:32px}
.cform h2{font-size:24px;margin-bottom:20px}
.cform label{display:block;font-size:14px;color:var(--primary);margin-bottom:6px}
.cform input,.cform textarea{width:100%;padding:13px 14px;border:2px solid #dde1ef;border-radius:var(--r-md);font-size:15px;margin-bottom:16px;outline:none;font-family:var(--sans)}
.cform input:focus,.cform textarea:focus{border-color:var(--tertiary)}
.cform textarea{min-height:120px;resize:vertical}
.form-notice{display:none;margin-top:16px;padding:14px 16px;border-radius:var(--r-md);background:#e6f6ec;border:1px solid #bfe6cd;color:#1e7a43;font-size:15px}
.form-notice.show{display:block}

.cform input.invalid,
.cform textarea.invalid{border-color:var(--error)}
.cform .field-error{display:block;margin:-10px 0 14px;color:var(--error);font-size:13px;min-height:1px}

.top{background:linear-gradient(135deg,var(--tertiary),#1658ac 60%,#0d3d7a);color:#fff;position:relative;overflow:hidden;padding-bottom:110px}
.top::before{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;background:rgba(255,255,255,.06);border-radius:var(--r-full);pointer-events:none}
.top-hero{position:relative;z-index:5;text-align:center;padding-top:30px;max-width:760px;margin:0 auto}
.top-hero h1{font-size:44px;line-height:1.12;margin-bottom:var(--s-md)}
.top-hero p{font-size:18px;opacity:.94;line-height:1.6}
.courses{padding:var(--s-xl) 0}
.courses-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s-lg)}
.course{background:#fff;color:#000;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:border-color .15s}
.course:hover{border-color:#dcdcdc}
.course .thumb{min-height:180px;background:linear-gradient(140deg,#84acd4,#515f80);overflow:hidden}
.course .thumb img{width:100%;height:100%;min-height:180px;object-fit:cover}
.course .body{padding:28px 24px;display:flex;flex-direction:column;flex:1}
.course .tag{align-self:flex-start;font-family:var(--sans);font-size:13px;color:var(--secondary);font-weight:500;margin-bottom:10px}
.course h3{font-size:22px;line-height:1.2;margin-bottom:10px}
.course p{font-size:15px;color:#333;line-height:1.6;margin-bottom:18px}
.course ul{list-style:none;margin-bottom:20px}
.course ul li{font-size:14px;color:#444;padding:6px 0 6px 24px;position:relative}
.course ul li::before{content:"✓";position:absolute;left:0;color:var(--tertiary);font-weight:700}
.course .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.course .price{font-family:var(--serif);font-size:24px;font-weight:700}
.course .price small{display:block;font-family:var(--sans);font-size:12px;color:var(--primary);font-weight:400}
.course .btn-primary{padding:12px 20px;min-height:48px;font-size:16px}
.cta-band{background:linear-gradient(135deg,var(--tertiary),#1658ac);color:#fff;border-radius:var(--r-lg);text-align:center;padding:var(--s-xl) 24px;margin-top:var(--s-xl)}
.cta-band h2{font-size:32px;margin-bottom:var(--s-md)}
.cta-band p{font-size:17px;opacity:.94;max-width:560px;margin:0 auto var(--s-lg)}
.cta-band .btn-primary{min-height:55px;color:#fff}

.modal-overlay{position:fixed;inset:0;background:rgba(10,20,40,.55);display:none;align-items:center;justify-content:center;z-index:1000;padding:20px;opacity:0;transition:opacity .2s;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}
.modal-overlay.open{display:flex;opacity:1}
.modal{background:#fff;border-radius:var(--r-lg);max-width:440px;width:100%;padding:34px 30px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.35);transform:translateY(14px);transition:transform .2s}
.modal-overlay.open .modal{transform:translateY(0)}
.modal h3{font-size:24px;margin-bottom:6px}
.modal .modal-sub{font-size:14px;color:#666;margin-bottom:22px}
.modal .field{margin-bottom:14px}
.modal label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:#333}
.modal input{width:100%;padding:12px 14px;font-size:15px;font-family:var(--sans);border:1px solid #dcdcdc;border-radius:var(--r-md);outline:none;transition:border-color .15s}
.modal input:focus{border-color:var(--tertiary)}
.modal .btn-primary{width:100%;margin-top:8px}
.modal-close{position:absolute;top:12px;right:14px;background:none;border:none;font-size:26px;line-height:1;color:#999;cursor:pointer;padding:4px}
.modal-close:hover{color:#333}
.modal-success{text-align:center;padding:20px 0}
.modal-success .ok-icon{width:66px;height:66px;border-radius:var(--r-full);background:#e7f7ea;color:#2e9e4f;font-size:34px;display:grid;place-items:center;margin:0 auto 18px}
.modal-success h3{margin-bottom:10px}
.modal-success p{font-size:15px;color:#555;margin-bottom:22px}

footer{background:var(--neutral);color:#fff;padding:var(--s-xl) 0 var(--s-lg)}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--s-lg)}
footer .brand{margin-bottom:var(--s-md)}
footer p{font-size:14px;color:#b7b7b7;max-width:340px;line-height:1.6}
footer h5{font-family:var(--serif);font-size:18px;margin-bottom:var(--s-md)}
footer ul{list-style:none}
footer ul li{margin-bottom:10px}
footer a{font-size:14px;color:#cfcfcf;text-decoration:none}
footer a:hover{color:#fff;text-decoration:underline}
.copy{border-top:1px solid #2a2a2a;margin-top:var(--s-lg);padding-top:var(--s-md);font-size:13px;color:#8a8a8a;text-align:center}

@media(max-width:900px){
  .burger{display:block;position:relative;z-index:30}
  .navlinks{display:none}
  .navlinks.open{display:flex;flex-direction:column;position:absolute;top:70px;right:24px;background:#0a1f3d;padding:14px 20px;border-radius:12px;z-index:1000;gap:6px;min-width:210px;box-shadow:0 12px 34px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.08)}
  .navlinks.open a{display:block;width:100%;padding:12px 6px;font-size:16px;position:relative;z-index:1;touch-action:manipulation;-webkit-tap-highlight-color:rgba(255,255,255,.15);border-bottom:1px solid rgba(255,255,255,.08)}
  .navlinks.open a:last-child{border-bottom:none}
  .navlinks.open a:hover,
  .navlinks.open a:active{opacity:1;text-decoration:none;color:#ffb84d}

  .hero-grid{grid-template-columns:1fr;text-align:center;gap:var(--s-lg)}
  .hero p.lead{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .main-grid{grid-template-columns:1fr}
  .article-grid{grid-template-columns:1fr}
  .courses-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .top-hero h1{font-size:34px}
  .art-title{font-size:28px}
  aside{position:static;top:auto}
}
@media(max-width:800px){
  .author-grid{grid-template-columns:1fr;justify-items:center;text-align:center}
  .facts{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .btn-primary,.btn-secondary{min-width:100%}
  .hero-portrait .frame{width:240px;height:240px}
  .chip{padding:10px 20px;font-size:15px}
}