/* ===== Ridna Blog ===== */
:root{
  --purple:#7E21D5; --purple-2:#A855F7; --purple-mid:#7E57C2;
  --bg:#F6F2FC; --surface:#FFFFFF; --surface-2:#FBF8FF;
  --text:#231433; --text-soft:#4A3A60; --muted:#6B5B85;
  --border:rgba(35,20,51,.12); --border-strong:rgba(126,33,213,.28);
  --badge-bg:#F3E8FF; --nav-bg:rgba(255,255,255,.72); --code-bg:#F4EEFD;
  --promo-grad:linear-gradient(135deg,rgba(126,33,213,.10) 0%,#fff 55%,rgba(126,33,213,.10) 100%);
  --sans:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --display:'Unbounded','Manrope',-apple-system,sans-serif;
  --nav-h:73px;
}
[data-theme="dark"]{
  --purple:#A855F7; --purple-mid:#C4B5FD;
  --bg:#06040F; --surface:rgba(255,255,255,.04); --surface-2:rgba(255,255,255,.02);
  --text:#EDE8F5; --text-soft:#C8BDD9; --muted:#7A6E90;
  --border:rgba(255,255,255,.08); --border-strong:rgba(168,85,247,.35);
  --badge-bg:rgba(126,33,213,.18); --nav-bg:rgba(6,4,15,.65); --code-bg:rgba(255,255,255,.05);
  --promo-grad:linear-gradient(135deg,rgba(126,33,213,.22) 0%,rgba(255,255,255,.03) 55%,rgba(126,33,213,.22) 100%);
}

*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;letter-spacing:-.01em}
a{color:var(--purple);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- шапка: той самий вигляд, що на лендінгу ---------- */
.site-nav{position:fixed;top:0;left:0;right:0;z-index:200;padding:16px 48px;display:flex;justify-content:space-between;align-items:center;backdrop-filter:blur(24px) saturate(180%);background:var(--nav-bg);border-bottom:1px solid var(--border)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-logo:hover{text-decoration:none}
.nav-logo-img{height:32px;width:auto;display:block;flex-shrink:0;filter:drop-shadow(0 0 16px rgba(126,33,213,.45))}
.nav-logo-text{font-family:var(--display);font-size:19px;font-weight:900;color:var(--text);letter-spacing:-.5px}
.nav-links{display:flex;gap:32px;list-style:none;align-items:center}
.nav-links a{color:var(--muted);text-decoration:none;font-size:13px;font-weight:600;letter-spacing:.3px;transition:color .2s}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-links a.is-current{color:var(--text)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:16px}
.nav-links a.nav-pill{background:#7E21D5;color:#fff;border:1px solid transparent;line-height:1;padding:11px 22px;border-radius:100px;font-size:13px;font-weight:700;box-shadow:0 0 24px rgba(126,33,213,.4);transition:transform .2s,box-shadow .2s}
.nav-links a.nav-pill:hover{transform:translateY(-1px);box-shadow:0 0 36px rgba(126,33,213,.6);text-decoration:none;color:#fff}
.nav-links a.nav-pill-ghost{background:transparent;color:var(--text);border:1px solid var(--border);box-shadow:none}
.nav-links a.nav-pill-ghost:hover{border-color:var(--purple);box-shadow:none;color:var(--text)}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;cursor:pointer;background:var(--surface);border:1px solid var(--border);color:var(--text);transition:border-color .2s,transform .15s}
.theme-toggle:hover{border-color:var(--purple);transform:translateY(-1px)}
.theme-toggle svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.theme-toggle .t-dark{display:none}
[data-theme="dark"] .theme-toggle .t-dark{display:inline-block}
[data-theme="dark"] .theme-toggle .t-light{display:none}

/* ---------- каркас ---------- */
.wrap{max-width:1120px;margin:0 auto;padding:calc(var(--nav-h) + 32px) 24px 0}
.crumb-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.crumb-row .crumbs{margin-bottom:0}
.all-posts{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:700;color:var(--text);background:var(--surface);border:1px solid var(--border);padding:8px 16px;border-radius:100px;transition:border-color .2s,transform .15s}
.all-posts:hover{border-color:var(--purple);transform:translateY(-1px);text-decoration:none;color:var(--text)}
.all-posts svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:22px;display:flex;gap:7px;flex-wrap:wrap;align-items:center}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--purple)}
.crumbs span[aria-current]{color:var(--text-soft)}
.badge{display:inline-block;background:var(--badge-bg);color:var(--purple);font-size:12px;font-weight:700;padding:5px 11px;border-radius:20px;margin-bottom:18px}

/* ---------- дві колонки: зміст + текст ---------- */
.art-layout{display:flex;gap:44px;align-items:flex-start}
.side-nav{flex:0 0 220px;position:sticky;top:calc(var(--nav-h) + 24px);display:flex;flex-direction:column;gap:8px}
.side-h{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:700;margin-bottom:8px}
.toc{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--border)}
.toc a{font-size:13.5px;color:var(--muted);padding:7px 0 7px 14px;margin-left:-1px;border-left:2px solid transparent;line-height:1.35;transition:color .16s,border-color .16s}
.toc a:hover{color:var(--text);text-decoration:none}
.toc a.on{color:var(--purple);border-left-color:var(--purple);font-weight:600}
.art-main{flex:1;min-width:0;max-width:740px}

/* ---------- лістинг ---------- */
.blog-head h1{font-family:var(--display);font-size:38px;font-weight:800;letter-spacing:-1px;line-height:1.2;margin-bottom:12px}
.blog-head .lede{font-size:17px;color:var(--text-soft);margin-bottom:40px;max-width:620px}
.post-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.post-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px 22px;transition:border-color .2s,transform .15s,box-shadow .2s}
.post-card:hover{border-color:var(--border-strong);transform:translateY(-2px);box-shadow:0 8px 22px rgba(126,33,213,.08);text-decoration:none}
.post-card h2{font-family:var(--display);font-size:20px;font-weight:700;color:var(--text);letter-spacing:-.4px;line-height:1.35;margin-bottom:8px}
.post-card p{font-size:15px;color:var(--text-soft);margin-bottom:12px}
.post-meta{font-size:13px;color:var(--muted)}
.empty{border:1px dashed var(--border-strong);border-radius:16px;padding:34px 26px;text-align:center;color:var(--muted);font-size:15px}

/* ---------- зображення в статті ---------- */
.cover{width:100%;aspect-ratio:1200/630;object-fit:cover;border-radius:18px;border:1px solid var(--border);margin:0 0 30px;display:block;background:var(--surface-2)}
figure{margin:30px 0}
figure img{margin:0}
figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center;line-height:1.5}
/* вертикальний скриншот телефона не має розтягуватись на всю ширину */
.shot{max-width:300px;margin:0 auto;display:block;border-radius:20px;border:1px solid var(--border);box-shadow:0 18px 40px rgba(0,0,0,.14)}
[data-theme="dark"] .shot{box-shadow:0 18px 40px rgba(0,0,0,.5)}

/* ---------- обкладинка в картці лістингу ---------- */
.post-card{display:flex;gap:20px;align-items:flex-start}
.post-thumb{flex:0 0 168px;aspect-ratio:1200/630;object-fit:cover;border-radius:11px;border:1px solid var(--border);background:var(--surface-2)}
.post-body{flex:1;min-width:0}

/* ---------- стаття ---------- */
article h1{font-family:var(--display);font-size:34px;font-weight:800;letter-spacing:-.9px;line-height:1.22;margin-bottom:14px}
.article-meta{font-size:14px;color:var(--muted);margin-bottom:34px;padding-bottom:24px;border-bottom:1px solid var(--border)}
article h2{font-family:var(--display);font-size:23px;font-weight:700;letter-spacing:-.5px;margin:42px 0 14px;line-height:1.3;scroll-margin-top:calc(var(--nav-h) + 20px)}
article h3{font-size:18px;font-weight:700;margin:30px 0 10px}
article p{margin-bottom:18px;color:var(--text-soft);font-size:17px}
article ul,article ol{margin:0 0 18px 22px;color:var(--text-soft);font-size:17px}
article li{margin-bottom:9px}
article strong{color:var(--text);font-weight:700}
article img{max-width:100%;height:auto;border-radius:14px;border:1px solid var(--border);margin:26px 0;display:block}
article figure{margin:26px 0}
article figure img{margin:0}
article figcaption{font-size:13px;color:var(--muted);margin-top:9px;text-align:center}
article blockquote{border-left:3px solid var(--purple);padding:4px 0 4px 20px;margin:26px 0;color:var(--text-soft)}
article code{background:var(--code-bg);border:1px solid var(--border);border-radius:6px;padding:2px 6px;font-size:14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
article table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;display:block;overflow-x:auto}
article th,article td{border:1px solid var(--border);padding:10px 13px;text-align:left}
article th{background:var(--surface);font-weight:700;color:var(--text)}
article td{color:var(--text-soft)}
article hr{border:0;border-top:1px solid var(--border);margin:38px 0}

/* ---------- завантаження файлу зі статті ---------- */
.dl-file{display:flex;align-items:center;gap:16px;margin:30px 0;padding:20px 22px;background:var(--surface);border:1px solid var(--border-strong);border-radius:16px}
.dl-file-ic{flex:0 0 auto;width:44px;height:44px;border-radius:12px;background:var(--badge-bg);color:var(--purple);display:flex;align-items:center;justify-content:center}
.dl-file-tx{flex:1;min-width:0}
.dl-file-tx strong{display:block;font-size:15px;color:var(--text);font-weight:700;margin-bottom:2px}
.dl-file-tx span{font-size:13px;color:var(--muted)}
.dl-file-btn{flex:0 0 auto;background:var(--purple);color:#fff;font-size:14px;font-weight:700;padding:11px 22px;border-radius:100px;transition:transform .15s,box-shadow .2s}
.dl-file-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(126,33,213,.35);text-decoration:none;color:#fff}

/* ---------- калькулятор у статті ---------- */
.calc{margin:32px 0;padding:24px;background:var(--surface);border:1px solid var(--border-strong);border-radius:18px}
.calc-h{font-family:var(--display);font-size:17px;font-weight:800;color:var(--text);letter-spacing:-.3px;margin-bottom:4px}
.calc-sub{font-size:13.5px;color:var(--muted);margin-bottom:20px;line-height:1.5}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}
.calc-f{display:flex;flex-direction:column;gap:6px;min-width:0}
.calc-f label{font-size:13px;font-weight:600;color:var(--text-soft);line-height:1.35}
.calc-f input{width:100%;font-family:var(--sans);font-size:15px;font-weight:600;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;transition:border-color .18s}
.calc-f input:focus{outline:none;border-color:var(--purple)}
.calc-f input:invalid{border-color:var(--danger,#F87171)}
.calc-f-pair{grid-column:1/-1}
.calc-pair{display:flex;align-items:center;gap:8px}
.calc-pair input{flex:0 1 110px}
.calc-pair span{font-size:14px;font-weight:700;color:var(--text-soft);white-space:nowrap}
.calc-row .s{display:block;font-size:12px;color:var(--muted);margin-top:6px;line-height:1.4}
.calc-out{margin-top:20px;padding-top:18px;border-top:1px solid var(--border)}
.calc-rows{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.calc-row{background:var(--surface-2);border:1px solid var(--border);border-radius:12px;padding:14px 16px}
.calc-row.win{border-color:var(--purple);background:var(--badge-bg)}
.calc-row .k{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.calc-row .v{display:block;font-family:var(--display);font-size:19px;font-weight:800;color:var(--text);letter-spacing:-.4px}
.calc-verdict{margin-top:14px;font-size:14.5px;color:var(--text-soft);line-height:1.5}
.calc-verdict strong{color:var(--text)}
.calc-note{margin-top:14px;font-size:12.5px;color:var(--muted);line-height:1.5}

/* ---------- нативний блок: частина тексту, не банер ---------- */
.native{margin:42px 0 0;padding:22px 24px;border-left:3px solid var(--purple);background:var(--surface-2);border-radius:0 14px 14px 0}
.native h2{margin:0 0 12px;font-size:20px;letter-spacing:-.4px}
.native p{margin-bottom:12px}
.native p:last-child{margin-bottom:0}
.native a{font-weight:700}

/* ---------- промо-банер: репліка фінального блоку лендінгу ---------- */
.promo{margin:56px 0 0;background:linear-gradient(135deg,rgba(126,33,213,.10) 0%,#FFFFFF 55%,rgba(126,33,213,.10) 100%);border:1px solid rgba(126,33,213,.3);border-radius:36px;padding:56px 32px;text-align:center;position:relative;overflow:hidden;box-shadow:0 40px 80px -20px rgba(126,33,213,.18)}
[data-theme="dark"] .promo{background:linear-gradient(135deg,rgba(126,33,213,.15) 0%,rgba(15,8,32,.6) 50%,rgba(126,33,213,.12) 100%);box-shadow:0 40px 80px -20px rgba(126,33,213,.3)}
.promo-badges{display:inline-flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:26px}
.promo-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(126,33,213,.35);background:rgba(126,33,213,.1);border-radius:12px;padding:8px 18px;font-size:12px;font-weight:700;letter-spacing:.5px;color:var(--purple-mid)}
.promo h3{font-family:var(--display);font-size:clamp(28px,4.5vw,44px);font-weight:900;line-height:1.05;letter-spacing:-1.6px;color:var(--text);margin-bottom:16px}
.promo h3 .accent{background:linear-gradient(120deg,var(--purple),#6D28D9);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
[data-theme="dark"] .promo h3 .accent{background:linear-gradient(135deg,#7E21D5,#C4B5FD);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.promo p{color:var(--text-soft);font-size:17px;line-height:1.65;max-width:520px;margin:0 auto 32px}
.promo-stores{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.store-btn{display:inline-flex;align-items:center;gap:12px;background:#000;color:#fff;padding:11px 22px;border-radius:14px;border:1px solid var(--border);transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s}
.store-btn:hover{text-decoration:none;color:#fff;transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.25)}
.store-btn svg{width:26px;height:26px;flex-shrink:0;fill:currentColor}
.store-btn-text{display:flex;flex-direction:column;line-height:1;text-align:left}
.store-btn-text small{font-size:10px;opacity:.85;margin-bottom:4px;letter-spacing:.4px;font-weight:500}
.store-btn-text strong{font-size:16px;font-weight:700;letter-spacing:-.3px}

/* ---------- схожі статті: горизонтальна карусель ---------- */
.related{margin-top:48px;border-top:1px solid var(--border);padding-top:26px}
.related h3{font-family:var(--display);font-weight:800;font-size:19px;letter-spacing:-.4px;margin-bottom:16px;color:var(--text)}
.rel-wrap{position:relative}
.rel-carousel{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:2px;margin:-2px;scrollbar-width:none;-ms-overflow-style:none}
.rel-carousel::-webkit-scrollbar{display:none}
.rel{flex:0 0 262px;scroll-snap-align:start;display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 18px;transition:border-color .16s,transform .15s}
.rel:hover{text-decoration:none;border-color:var(--border-strong);transform:translateY(-2px)}
.rel-t{font-size:14.5px;font-weight:700;color:var(--text);line-height:1.35}
.rel-d{font-size:12.5px;color:var(--muted);margin-top:auto}
.rel-nav{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;border-radius:50%;background:var(--surface);border:1px solid var(--border);color:var(--text);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:2;box-shadow:0 4px 14px rgba(0,0,0,.12);transition:border-color .2s,opacity .2s}
.rel-nav:hover{border-color:var(--purple)}
.rel-nav.prev{left:-14px}
.rel-nav.next{right:-14px}
.rel-nav[hidden]{display:none}
.rel-nav svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ---------- телеграм: плаваюча кнопка ---------- */
.tg-fab{position:fixed;right:18px;bottom:18px;width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,#2aabee,#229ed9);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px rgba(34,158,217,.45);z-index:300}
.tg-fab:hover{text-decoration:none}
.tg-fab svg{width:27px;height:27px;fill:#fff}
.tg-fab-label{position:absolute;right:66px;top:50%;transform:translateY(-50%) translateX(6px);background:#171226;color:#fff;font-size:13px;font-weight:600;padding:8px 12px;border-radius:9px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;box-shadow:0 6px 18px rgba(0,0,0,.2)}
.tg-fab:hover .tg-fab-label{opacity:1;transform:translateY(-50%) translateX(0)}

/* ---------- футер ---------- */
.blog-footer{margin-top:56px;padding:24px 0 40px;border-top:1px solid var(--border);font-size:14px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between}
.blog-footer a{color:var(--muted)}
.blog-footer a:hover{color:var(--purple)}

/* ---------- поп-ап із пропозицією завантажити ---------- */
.dl-back{position:fixed;inset:0;background:rgba(6,4,15,.55);backdrop-filter:blur(3px);z-index:600;opacity:0;pointer-events:none;transition:opacity .25s}
.dl-back.show{opacity:1;pointer-events:auto}
.dl-pop{position:fixed;left:50%;top:50%;transform:translate(-50%,-46%) scale(.97);z-index:601;width:440px;max-width:calc(100vw - 32px);background:var(--surface);border:1px solid rgba(126,33,213,.3);border-radius:24px;padding:34px 32px 30px;text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.28);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s}
[data-theme="dark"] .dl-pop{background:#0F0820;box-shadow:0 30px 80px rgba(0,0,0,.7)}
.dl-pop.show{opacity:1;transform:translate(-50%,-50%) scale(1);pointer-events:auto}
.dl-pop h4{font-family:var(--display);font-size:22px;font-weight:800;color:var(--text);margin-bottom:10px;letter-spacing:-.6px;line-height:1.2}
.dl-pop p{font-size:15px;color:var(--text-soft);margin:0 auto 22px;max-width:330px}
.dl-pop .promo-stores{margin-top:4px}
.dl-pop-x{position:absolute;top:14px;right:14px;width:30px;height:30px;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:20px;line-height:1;border-radius:9px}
.dl-pop-x:hover{color:var(--text);background:var(--surface-2)}

@media (max-width:1024px) and (min-width:641px){
  .site-nav{padding:16px 20px}
  .nav-links{gap:18px}
  .nav-links a:not(.nav-pill){font-size:12.5px}
  .nav-actions{margin-left:10px}
}
@media (max-width:860px) and (min-width:641px){
  .site-nav{padding:14px 16px}
  .nav-logo-text{display:none}
  .nav-links{gap:16px}
  .nav-links a[href*="#"]:not(.nav-pill){display:none}
}
@media (max-width:900px){
  .art-layout{display:block}
  .side-nav{display:none}
  .art-main{max-width:none}
}
@media (max-width:640px){
  :root{--nav-h:62px}
  .site-nav{padding:12px 12px}
  .nav-links a:not(.nav-pill){display:none}
  .nav-links{gap:8px}
  .nav-pill{padding:9px 13px;font-size:12px}
  .nav-actions{margin-left:8px;gap:7px}
  .wrap{padding:calc(var(--nav-h) + 22px) 18px 0}
  .blog-head h1{font-size:29px}
  article h1{font-size:27px}
  article h2{font-size:20px;margin:34px 0 12px}
  article p,article ul,article ol{font-size:16px}
  .dl-file{flex-direction:column;align-items:flex-start;gap:12px}
  .calc-grid,.calc-rows{grid-template-columns:1fr}
  .calc{padding:18px}
  .post-card{padding:16px;flex-direction:column;gap:14px}
  .post-thumb{flex:none;width:100%}
  .shot{max-width:250px}
    .rel-nav{display:none}
  .rel{flex-basis:230px}
  .crumb-row{gap:10px}
  .all-posts{padding:7px 13px;font-size:12.5px}
  .crumbs span[aria-current],.crumbs span:nth-last-child(2){display:none}
  .promo{padding:36px 20px;border-radius:26px}
  .dl-pop{width:auto;left:16px;right:16px;transform:translate(0,-46%) scale(.97);padding:28px 22px 24px}
  .dl-pop.show{transform:translate(0,-50%) scale(1)}
  .promo-stores{flex-direction:column;align-items:stretch}
  .store-btn{justify-content:center}
}