/* ===== Фирменные токены (холодная сталь/индиго/лёд) ===== */
:root{
  --brand:#2b3a67;      /* глубокий стальной индиго */
  --brand-2:#3b5bdb;    /* яркий индиго */
  --accent:#00b4d8;     /* ледяной циан */
  --bg:#f4f6fb;
  --surface:#ffffff;
  --surface-2:#eef1f8;
  --text:#101423;
  --muted:#5a6478;
  --border:#dde3ef;
  --grad:linear-gradient(135deg,var(--brand-2),var(--accent));

  /* острые углы */
  --radius-1:3px;
  --radius-2:5px;
  --radius-3:6px;

  /* драматичные тени */
  --shadow-1:0 1px 2px rgba(16,20,35,.06);
  --shadow-2:0 14px 34px -12px rgba(16,20,35,.28);
  --shadow-3:0 30px 60px -18px rgba(27,40,90,.35);

  --container:1180px;
  --font-sans:"Segoe UI",system-ui,-apple-system,"Inter",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-serif:Georgia,"Times New Roman",serif;
  --ease-out:cubic-bezier(.22,.61,.36,1);
  --header-h:66px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(60% 45% at 88% -5%,rgba(0,180,216,.10),transparent 60%),
    radial-gradient(55% 40% at 0% 0%,rgba(59,91,219,.10),transparent 60%);
  background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.container--narrow{max-width:760px}
.muted{color:var(--muted)}

/* ===== Шапка ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--surface) 82%,transparent);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.site-header__inner{
  display:flex;align-items:center;gap:20px;
  min-height:var(--header-h);
}
.logo{display:inline-flex;align-items:center;gap:9px;font-size:1.2rem;font-weight:600;letter-spacing:-.02em}
.logo b{color:var(--brand)}
.site-nav{display:flex;align-items:center;gap:22px;margin-left:auto}
.site-nav a{font-size:.94rem;color:var(--muted);font-weight:500;transition:color .18s var(--ease-out)}
.site-nav a:hover{color:var(--text)}

.searchbar{display:flex;align-items:stretch}
.searchbar input{
  border:1px solid var(--border);background:var(--surface);
  padding:9px 12px;font:inherit;font-size:.9rem;color:var(--text);
  border-radius:var(--radius-1) 0 0 var(--radius-1);outline:none;min-width:0;
}
.searchbar input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(59,91,219,.15)}
.searchbar button{
  border:1px solid var(--brand);background:var(--brand);color:#fff;
  padding:9px 14px;font:inherit;font-size:.9rem;cursor:pointer;
  border-radius:0 var(--radius-1) var(--radius-1) 0;display:flex;align-items:center;
  transition:background .18s var(--ease-out);
}
.searchbar button:hover{background:var(--brand-2);border-color:var(--brand-2)}
.searchbar--nav input{width:150px}

.nav-toggle{display:none}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;margin-left:auto}
.burger span{width:24px;height:2px;background:var(--text);border-radius:2px}

/* ===== Hero ===== */
.hero{padding:64px 0 40px;position:relative}
.hero__grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand-2);margin-bottom:14px;
}
.hero h1{
  font-size:clamp(2.4rem,5vw,4rem);line-height:1.02;letter-spacing:-.03em;
  margin:0 0 18px;font-weight:800;
}
.hero__lead{font-size:1.12rem;color:var(--muted);max-width:34ch;margin:0 0 26px}
.searchbar--hero input{flex:1;padding:14px 16px;font-size:1rem}
.searchbar--hero button{padding:14px 22px;font-size:1rem;font-weight:600}

.feature{
  display:block;background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-3);overflow:hidden;
  transition:transform .2s var(--ease-out),box-shadow .2s var(--ease-out);
}
.feature:hover{transform:translateY(-4px)}
.feature__media{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.feature__media img{width:100%;height:100%;object-fit:cover}
.feature__body{padding:24px}
.feature__title{font-size:1.5rem;line-height:1.15;letter-spacing:-.02em;margin:12px 0 10px;font-weight:700}
.feature__excerpt{color:var(--muted);margin:0 0 16px}

/* ===== Секции ===== */
.section{padding:76px 0}
.section--alt{background:var(--surface-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section__head{margin-bottom:34px}
.section__title{font-size:clamp(1.6rem,3vw,2.2rem);letter-spacing:-.02em;margin:0 0 6px;font-weight:800}

/* Теги/рубрики */
.tag{
  display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--brand-2);background:rgba(59,91,219,.1);
  padding:5px 10px;border-radius:var(--radius-1);
}
.tag--onmedia{
  position:absolute;left:12px;top:12px;background:var(--surface);
  color:var(--brand);box-shadow:var(--shadow-1);
}
.topics{display:flex;flex-wrap:wrap;gap:14px}
.topic-chip{
  display:inline-flex;align-items:center;gap:10px;background:var(--surface);
  border:1px solid var(--border);padding:12px 18px;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease-out),box-shadow .18s var(--ease-out),border-color .18s;
}
.topic-chip:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand-2)}
.topic-chip__name{font-weight:600}
.topic-chip__count{
  font-size:.8rem;font-weight:700;color:#fff;background:var(--brand);
  padding:2px 8px;border-radius:var(--radius-pill,999px);
}

/* ===== Лента карточек ===== */
.feed{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-1);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s var(--ease-out),box-shadow .2s var(--ease-out);
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-2)}
.card__media{position:relative;aspect-ratio:16/10;background:var(--surface-2);overflow:hidden;display:block}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease-out)}
.card:hover .card__media img{transform:scale(1.04)}
.card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card__title{font-size:1.15rem;line-height:1.25;letter-spacing:-.01em;margin:0;font-weight:700}
.card__title a:hover{color:var(--brand-2)}
.card__excerpt{color:var(--muted);font-size:.94rem;margin:0;flex:1}
.card__meta{display:flex;align-items:center;gap:8px;font-size:.82rem;color:var(--muted);flex-wrap:wrap}
.dot{width:3px;height:3px;border-radius:50%;background:var(--muted);display:inline-block}

/* ===== Заголовок страницы ===== */
.page-head{padding:56px 0 12px}
.page-head h1{font-size:clamp(2rem,4vw,3rem);letter-spacing:-.03em;margin:.2em 0 .3em;font-weight:800}
.searchbar--page{max-width:560px;margin:18px 0}
.searchbar--page input{flex:1;padding:14px 16px;font-size:1rem}
.searchbar--page button{padding:14px 22px;font-size:1rem;font-weight:600}

/* ===== Статья ===== */
.post__head{padding:48px 0 8px}
.post__topic{display:inline-block;margin-bottom:14px;font-size:.8rem;font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;color:var(--brand-2)}
.post__head h1{font-size:clamp(2.1rem,4.4vw,3.2rem);line-height:1.08;letter-spacing:-.03em;margin:0 0 18px;font-weight:800}
.post__meta{display:flex;align-items:center;gap:8px;font-size:.92rem;color:var(--muted);flex-wrap:wrap}
.post__cover{margin:28px auto 8px}
.post__cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid var(--border);box-shadow:var(--shadow-2)}

.post__body{font-family:var(--font-serif);font-size:1.19rem;line-height:1.85;color:#1c2233;padding:22px 0 12px}
.post__body p{margin:0 0 1.35em}
.post__body h2{
  font-family:var(--font-sans);font-size:1.55rem;line-height:1.2;letter-spacing:-.02em;
  margin:1.6em 0 .5em;font-weight:800;color:var(--text);
}
.post__body img{width:100%;aspect-ratio:16/9;object-fit:cover;margin:1.6em 0;border:1px solid var(--border);box-shadow:var(--shadow-1)}
.post__body blockquote{
  margin:1.6em 0;padding:16px 24px;border-left:4px solid var(--accent);
  background:var(--surface-2);font-style:italic;color:#26304a;
}
.post__body a{color:var(--brand-2);text-decoration:underline;text-underline-offset:3px}

/* ===== Подписка ===== */
.subscribe-box{
  background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-2);
  padding:36px;text-align:center;
}
.subscribe-box h2{font-size:1.6rem;letter-spacing:-.02em;margin:0 0 8px;font-weight:800}
.subscribe{display:flex;gap:10px;margin:18px auto 0;max-width:460px}
.subscribe input{
  flex:1;border:1px solid var(--border);background:var(--surface);
  padding:13px 15px;font:inherit;border-radius:var(--radius-1);outline:none;min-width:0;
}
.subscribe input:focus{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(59,91,219,.15)}
.btn-accent{
  border:none;background:var(--grad);color:#fff;font:inherit;font-weight:700;
  padding:13px 26px;cursor:pointer;border-radius:var(--radius-1);white-space:nowrap;
  box-shadow:var(--shadow-1);transition:transform .15s var(--ease-out),filter .15s;
}
.btn-accent:hover{filter:brightness(1.06)}
.btn-accent:active{transform:translateY(1px)}
.form-note{margin:14px 0 0;font-weight:600;font-size:.95rem}
.form-note--ok{color:#0a7d4b}
.form-note--err{color:#c0392b}

/* ===== Подвал ===== */
.site-footer{background:#0e1428;color:#c4cbe0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;padding:56px 24px}
.logo--footer{color:#fff}
.logo--footer b{color:#fff}
.footer-about{color:#95a0bd;font-size:.95rem;margin:14px 0 18px;max-width:38ch}
.socials{display:flex;gap:10px}
.socials a{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.07);color:#c4cbe0;border-radius:var(--radius-1);
  transition:background .18s var(--ease-out),color .18s,transform .18s;
}
.socials a:hover{background:var(--accent);color:#04121a;transform:translateY(-2px)}
.footer-col h4{color:#fff;font-size:1rem;margin:0 0 16px;letter-spacing:-.01em}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#95a0bd;font-size:.94rem;transition:color .18s}
.footer-col a:hover{color:#fff}
.footer-col--sub .muted{color:#95a0bd;font-size:.9rem;margin:0 0 14px}
.subscribe--footer{margin:0;max-width:none}
.subscribe--footer input{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);color:#fff}
.subscribe--footer input::placeholder{color:#7c88a8}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08)}
.footer-bottom .container{display:flex;justify-content:space-between;gap:16px;padding-top:20px;padding-bottom:20px;font-size:.86rem;color:#7c88a8;flex-wrap:wrap}

/* ===== Адаптив ===== */
@media (max-width:900px){
  .hero__grid{grid-template-columns:1fr;gap:34px}
  .feed{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:720px){
  .burger{display:flex}
  .site-nav{
    position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--surface);border-bottom:1px solid var(--border);
    box-shadow:var(--shadow-2);padding:8px 0;margin:0;
    transform:translateY(-140%);transition:transform .25s var(--ease-out);
    max-height:calc(100vh - var(--header-h));overflow:auto;
  }
  .nav-toggle:checked ~ .site-nav{transform:translateY(0)}
  .site-nav a{padding:13px 24px;border-bottom:1px solid var(--border)}
  .searchbar--nav{padding:12px 24px}
  .searchbar--nav input{width:auto;flex:1}
}
@media (max-width:600px){
  .feed{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:52px 0}
  .subscribe{flex-direction:column}
  .subscribe-box{padding:26px 20px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}