/* ============================================================
   BILK.RU — портал лабораторной диагностики
   Палитра по брифу: #1a3a5c / #2ecc71 / #f5f7fa
   ============================================================ */
:root{
  --ink:#1a3a5c;
  --ink-2:#0f2a44;
  --accent:#2ecc71;
  --accent-dark:#24ae60;
  --bg:#f5f7fa;
  --paper:#ffffff;
  --line:#dde5ee;
  --text:#243447;
  --muted:#64748b;
  --radius:10px;
  --font:'Inter','Roboto',-apple-system,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular',Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--accent-dark)}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}

/* ---------- Хедер ---------- */
.topbar{background:var(--ink-2);color:#b9c9da;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#b9c9da;margin-left:20px}
.topbar a:hover{color:var(--accent)}
.header{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}
.header .wrap{display:flex;align-items:center;gap:32px;height:68px}
.logo{display:flex;align-items:baseline;gap:8px;font-weight:800;font-size:24px;color:var(--ink);letter-spacing:-.5px}
.logo b{color:var(--accent)}
.logo small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.4px;text-transform:uppercase}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{padding:8px 14px;font-size:14px;font-weight:500;color:var(--text);border-radius:6px}
.nav a:hover{background:var(--bg);color:var(--ink)}
.nav a.active{color:var(--ink);background:var(--bg);box-shadow:inset 0 -2px 0 var(--accent)}
.header-search{margin-left:auto;display:flex;align-items:center;gap:10px}
.header-search input{width:210px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;font-size:13px;font-family:var(--font);background:var(--bg);outline:none;transition:.2s}
.header-search input:focus{border-color:var(--accent);background:#fff;width:260px}
.btn{display:inline-block;padding:10px 22px;border-radius:8px;font-size:14px;font-weight:600;border:1px solid transparent;cursor:pointer;font-family:var(--font);transition:.15s}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-2);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-sm{padding:7px 16px;font-size:13px}
.burger{display:none;background:none;border:none;font-size:22px;color:var(--ink);cursor:pointer}

/* ---------- Геро ---------- */
.hero{background:linear-gradient(135deg,var(--ink-2) 0%,var(--ink) 55%,#1e4a72 100%);color:#fff;padding:88px 0 96px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:
  radial-gradient(circle at 82% 18%,rgba(46,204,113,.22),transparent 42%),
  radial-gradient(circle at 8% 90%,rgba(46,204,113,.12),transparent 38%);pointer-events:none}
.hero .wrap{position:relative;z-index:2}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.hero-eyebrow::before{content:"";width:28px;height:2px;background:var(--accent)}
.hero h1{font-size:clamp(34px,5vw,56px);font-weight:800;line-height:1.12;letter-spacing:-1.2px;max-width:720px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.sub{margin:20px 0 36px;font-size:17px;color:#c3d2e2;max-width:560px}
.hero-search{display:flex;max-width:640px;background:#fff;border-radius:12px;padding:6px;box-shadow:0 18px 50px rgba(0,0,0,.28)}
.hero-search input{flex:1;border:none;outline:none;padding:12px 18px;font-size:15px;font-family:var(--font);border-radius:8px}
.hero-tags{margin-top:18px;font-size:13px;color:#9db2c7}
.hero-tags a{color:#cfe0ef;border-bottom:1px dotted #7d95ad;margin-right:14px}
.hero-tags a:hover{color:var(--accent);border-color:var(--accent)}
.hero-stats{display:flex;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero-stats .num{font-size:30px;font-weight:800;font-family:var(--mono);color:#fff}
.hero-stats .num i{font-style:normal;color:var(--accent)}
.hero-stats .lbl{font-size:13px;color:#9db2c7;margin-top:2px}

/* ---------- Табы аудиторий ---------- */
.section{padding:72px 0}
.section-tight{padding:48px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:var(--ink);letter-spacing:-.6px;line-height:1.2}
.section-head .kick{font-size:12px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent-dark);display:block;margin-bottom:8px}
.section-head p{color:var(--muted);max-width:520px;margin-top:8px;font-size:15px}
.link-more{font-size:14px;font-weight:600;white-space:nowrap;border-bottom:2px solid var(--accent);padding-bottom:2px}

.audience-tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:36px;flex-wrap:wrap}
.audience-tabs button{background:none;border:none;font-family:var(--font);font-size:16px;font-weight:600;color:var(--muted);padding:14px 22px;cursor:pointer;position:relative;transition:.15s}
.audience-tabs button:hover{color:var(--ink)}
.audience-tabs button.on{color:var(--ink)}
.audience-tabs button.on::after{content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:3px;background:var(--accent);border-radius:2px}
.tab-panel{display:none}
.tab-panel.on{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- Карточки сервисов ---------- */
.svc-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;transition:.18s;position:relative}
.svc-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 14px 34px rgba(26,58,92,.09)}
.svc-ico{width:44px;height:44px;margin-bottom:16px;color:var(--ink)}
.svc-card h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:8px}
.svc-card p{font-size:14px;color:var(--muted);flex:1}
.svc-card .go{margin-top:18px;font-size:13px;font-weight:700;color:var(--accent-dark);display:flex;align-items:center;gap:6px}
.svc-card .go::after{content:"→";transition:.15s}
.svc-card:hover .go::after{transform:translateX(4px)}
.svc-tag{position:absolute;top:18px;right:18px;font-size:11px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;padding:4px 10px;border-radius:999px;background:rgba(46,204,113,.12);color:var(--accent-dark)}
.svc-tag.blue{background:rgba(26,58,92,.08);color:var(--ink)}

/* ---------- Статьи ---------- */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.article-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.article-card:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 14px 34px rgba(26,58,92,.09)}
.article-cover{height:8px;overflow:hidden}
.article-cover:not(.has-img){background:linear-gradient(90deg,var(--ink),var(--accent))}
.article-body{padding:22px;display:flex;flex-direction:column;flex:1}
.article-meta{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.tag{font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:999px;background:var(--bg);color:var(--muted);border:1px solid var(--line)}
.tag.green{background:rgba(46,204,113,.12);color:var(--accent-dark);border-color:transparent}
.tag.blue{background:rgba(26,58,92,.08);color:var(--ink);border-color:transparent}
.article-card h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.35;margin-bottom:8px}
.article-card p{font-size:14px;color:var(--muted);flex:1}
.article-foot{margin-top:16px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:12px}

/* ---------- Таблицы / каталог ---------- */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
table.data th{background:var(--ink);color:#fff;text-align:left;padding:14px 16px;font-size:12px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;white-space:nowrap}
table.data td{padding:14px 16px;border-top:1px solid var(--line);vertical-align:middle}
table.data tr:hover td{background:var(--bg)}
table.data td b{color:var(--ink)}
table.data .num{font-family:var(--mono);font-size:13px}
.pill{font-size:11px;font-weight:700;padding:3px 10px;border-radius:999px}
.pill.g{background:rgba(46,204,113,.14);color:var(--accent-dark)}
.pill.b{background:rgba(26,58,92,.09);color:var(--ink)}
.compare-note{font-size:12px;color:var(--muted);margin-top:10px}

/* ---------- Калькуляторы ---------- */
.calc-layout{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
@media(max-width:860px){.calc-layout{grid-template-columns:1fr}}
.calc-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.calc-form h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:4px}
.calc-form .hint{font-size:13px;color:var(--muted);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.field input,.field select{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:var(--font);outline:none;background:#fff;transition:.15s}
.field input:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(46,204,113,.15)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.calc-result{background:var(--ink);color:#fff;border-radius:var(--radius);padding:28px;position:sticky;top:92px}
.calc-result h4{font-size:13px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--accent);margin-bottom:18px}
.result-big{font-size:44px;font-weight:800;font-family:var(--mono);letter-spacing:-1px;line-height:1}
.result-big small{font-size:16px;font-weight:500;color:#9db2c7}
.result-line{display:flex;justify-content:space-between;padding:11px 0;border-top:1px solid rgba(255,255,255,.12);font-size:14px}
.result-line span{color:#b9c9da}
.result-line b{font-family:var(--mono)}
.result-note{margin-top:18px;font-size:12px;color:#8fa6bd;line-height:1.5}
.result-bar{height:8px;background:rgba(255,255,255,.14);border-radius:99px;margin:14px 0 6px;overflow:hidden}
.result-bar i{display:block;height:100%;background:var(--accent);border-radius:99px;transition:width .4s ease}
.scale-labels{display:flex;justify-content:space-between;font-size:10px;color:#8fa6bd;text-transform:uppercase;letter-spacing:.5px}

/* ---------- Чек-лист ---------- */
.checklist{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:8px 0}
.checklist label{display:flex;gap:14px;align-items:flex-start;padding:14px 22px;border-top:1px solid var(--line);cursor:pointer;font-size:14px;transition:.15s}
.checklist label:first-child{border-top:none}
.checklist label:hover{background:var(--bg)}
.checklist input{margin-top:4px;accent-color:var(--accent);width:16px;height:16px}
.checklist label.done span{text-decoration:line-through;color:var(--muted)}

/* ---------- Баннер-договоренность ---------- */
.notice{background:rgba(46,204,113,.08);border:1px solid rgba(46,204,113,.35);border-radius:var(--radius);padding:18px 22px;font-size:13px;color:#1d7a49;display:flex;gap:12px;align-items:flex-start}
.notice b{display:block;font-size:14px;margin-bottom:2px}

/* ---------- Футер ---------- */
.footer{background:var(--ink-2);color:#9db2c7;margin-top:40px}
.footer .wrap{padding:56px 24px 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer .logo{color:#fff}
.footer h5{color:#fff;font-size:13px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:16px}
.footer ul{list-style:none}
.footer li{margin-bottom:10px;font-size:14px}
.footer a{color:#9db2c7}
.footer a:hover{color:var(--accent)}
.footer p{font-size:13px;margin-top:14px;max-width:320px;line-height:1.6}
.disclaimer{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;font-size:12px;color:#6e84a0;display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}

/* ---------- Хлебные крошки / заголовок страницы ---------- */
.page-head{background:var(--paper);border-bottom:1px solid var(--line);padding:36px 0}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent-dark)}
.page-head h1{font-size:clamp(26px,3.6vw,40px);font-weight:800;color:var(--ink);letter-spacing:-.8px}
.page-head p{color:var(--muted);margin-top:8px;max-width:640px}

/* ---------- Фильтры каталога ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.chip{padding:8px 18px;border:1px solid var(--line);border-radius:999px;background:#fff;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer;font-family:var(--font);transition:.15s}
.chip:hover{border-color:var(--ink);color:var(--ink)}
.chip.on{background:var(--ink);border-color:var(--ink);color:#fff}

/* ---------- Иллюстрации в статьях ---------- */
.art-figure{margin:24px 0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--paper)}
.art-figure img{display:block;width:100%}
.art-figure figcaption{padding:10px 16px;font-size:12.5px;color:var(--muted);border-top:1px solid var(--line)}
/* Карточки статей: единая структура — обложка сверху фиксированной высоты, тело ниже */
.article-card{display:flex;flex-direction:column}
.article-cover{flex:none}
.article-cover.has-img{height:180px;background:var(--bg);overflow:hidden}
.article-cover.has-img img{display:block;width:100%;height:100%;object-fit:cover;object-position:center top}
.article-body{display:flex;flex-direction:column;flex:1;min-height:0}
.article-body p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.article-foot{margin-top:auto;padding-top:12px}

/* ---------- Адаптив ---------- */
@media(max-width:900px){
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 24px;border-bottom:1px solid var(--line);box-shadow:0 20px 30px rgba(0,0,0,.08)}
  .nav.open{display:flex}
  .burger{display:block}
  .header-search input{width:130px}
  .header-search input:focus{width:150px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero-stats{gap:28px}
}
@media(max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .header .btn{display:none}
}