*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy:#1a2744; --navy2:#2c3e6b; --red:#E53935; --green:#16a34a;
  --grey:#64748b; --light:#f8f9fc; --border:#e2e8f0; --white:#fff;
}
html { scroll-behavior: smooth; }
body { font-family:-apple-system,BlinkMacSystemFont,'Inter','Segoe UI',sans-serif; color:var(--navy); background:var(--white); line-height:1.65; font-size:16px; -webkit-font-smoothing:antialiased; }

  /* Nav */
  nav { position:sticky; top:0; z-index:100; background:rgba(255,255,255,.96); backdrop-filter:blur(10px); border-bottom:1px solid var(--border); padding:0 2rem; }
  .nav-inner { max-width:1100px; margin:0 auto; display:grid; grid-template-columns:auto 1fr auto; align-items:center; height:62px; gap:1.25rem; }
  .logo { font-size:1.2rem; font-weight:800; text-decoration:none; letter-spacing:-.03em; white-space:nowrap; display:flex; align-items:center; gap:6px; color:var(--navy); }
  .logo em { font-style:normal; }
  .nav-links { display:flex; gap:1.4rem; list-style:none; justify-content:center; }
  .nav-links a { text-decoration:none; color:var(--grey); font-size:.875rem; font-weight:500; transition:color .2s; }
  .nav-links a:hover { color:var(--navy); }
  .nav-right { display:flex; align-items:center; gap:0; justify-content:flex-end; }
  .lang-dd { position:relative; flex-shrink:0; }
  .lang-dd-btn { display:flex; align-items:center; gap:.35rem; border:none; background:#eef1f8; cursor:pointer; padding:.4rem .75rem; border-radius:20px; font-size:.72rem; font-weight:700; color:var(--navy); letter-spacing:.04em; line-height:1; white-space:nowrap; }
  .lang-dd-btn svg { transition:transform .2s; flex-shrink:0; }
  .lang-dd-btn.open svg { transform:rotate(180deg); }
  .lang-dd-menu { display:none; position:absolute; top:calc(100% + 8px); right:0; background:white; border:1px solid var(--border); border-radius:10px; box-shadow:0 8px 24px rgba(0,0,0,.08); padding:.35rem; min-width:150px; z-index:200; }
  .lang-dd-menu.open { display:block; }
  .lang-dd-item { display:block; width:100%; text-align:left; border:none; background:transparent; cursor:pointer; padding:.55rem .7rem; border-radius:6px; font-size:.85rem; font-weight:500; color:var(--navy); }
  .lang-dd-item:hover { background:#eef1f8; }
  .lang-dd-item.active { background:var(--navy); color:white; }
  .nav-sep { width:1px; height:18px; background:var(--border); flex-shrink:0; margin:0 .875rem; }
  .nav-cta { background:var(--red); color:white; border-radius:8px; font-size:.875rem; font-weight:600; text-decoration:none; transition:background .2s; white-space:nowrap; line-height:1; flex-shrink:0; padding:0 1.25rem; height:36px; display:flex; align-items:center; justify-content:center; }
  .nav-cta:hover { background:var(--red-h,#C62828); }
  .burger { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:6px; margin-left:1.5rem; border:none; background:transparent; }
  .burger-sep { display:none; width:1px; height:20px; background:var(--border); margin-left:1.5rem; flex-shrink:0; }
  .burger span { display:block; width:22px; height:2px; background:var(--navy); border-radius:2px; transition:transform .25s,opacity .25s; }
  .burger.open span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
  .burger.open span:nth-child(2) { opacity:0; }
  .burger.open span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }
  .nav-drawer { display:none; position:absolute; top:62px; left:0; right:0; background:white; border-bottom:1px solid var(--border); box-shadow:0 8px 24px rgba(0,0,0,.08); z-index:99; padding:1rem 1.5rem 1.25rem; }
  .nav-drawer.open { display:block; }
  .nav-drawer ul { list-style:none; display:flex; flex-direction:column; gap:0; }
  .nav-drawer ul a { display:block; padding:.75rem 0; font-size:.95rem; font-weight:500; color:var(--navy); text-decoration:none; border-bottom:1px solid var(--border); }
  .nav-drawer ul li:last-child a { border-bottom:none; }
  .breadcrumb { position:static; }
  @media (max-width:1024px) {
    .nav-inner { grid-template-columns:auto auto; }
    .nav-links { display:none; }
    .burger { display:flex; }
    .burger-sep { display:block; }
  }
  @media (max-width:600px) {
    .nav-inner { gap:.75rem; }
    .nav-sep { display:none; }
    .nav-cta { width:auto; padding:0 .75rem; font-size:.78rem; }
    .burger-sep { display:none; }
    .nav-right { gap:.625rem; }
  }
  @media (max-width:400px) {
    .nav-cta { display:none; }
  }

/* Two-column layout */
.page-outer { padding:0 2rem; }
.page-layout { max-width:1100px; margin:0 auto; display:grid; grid-template-columns:1fr 280px; gap:4rem; padding:3.5rem 0 5rem; align-items:start; }
.article-main { min-width:0; }
.article-sidebar { position:sticky; top:82px; display:flex; flex-direction:column; gap:1.5rem; }

.sidebar-cta { background:var(--navy); border-radius:14px; padding:1.5rem; text-align:center; }
.sidebar-cta h3 { color:white; font-size:1rem; font-weight:700; margin-bottom:.5rem; line-height:1.4; }
.sidebar-cta p { color:rgba(255,255,255,.6); font-size:.825rem; margin-bottom:1rem; line-height:1.6; }
.sidebar-cta .cta-btn { display:block; background:#E53935; color:white; font-size:.875rem; font-weight:700; padding:.65rem 1.25rem; border-radius:8px; text-decoration:none; transition:opacity .2s; }
.sidebar-cta .cta-btn:hover { opacity:.88; }

.sidebar-related h3 { font-size:.7rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--grey); margin-bottom:.75rem; }
.sidebar-related .related-card { display:flex; flex-direction:column; gap:.2rem; text-decoration:none; border:1px solid var(--border); border-radius:10px; padding:.8rem 1rem; transition:border-color .2s,box-shadow .2s; margin-bottom:.5rem; }
.sidebar-related .related-card:hover { border-color:#94a3b8; box-shadow:0 2px 8px rgba(0,0,0,.07); }
.sidebar-related .related-cat { font-size:.6rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; color:#15803d; }
.sidebar-related .related-name { font-size:.85rem; font-weight:600; color:var(--navy); line-height:1.35; }

@media(max-width:900px) {
  .page-layout { grid-template-columns:1fr; gap:0; padding:2.5rem 0 4rem; }
  .article-sidebar { position:static; margin-top:2.5rem; }
  .sidebar-related .related-card { margin-bottom:.5rem; }
}
.breadcrumb { display:flex; align-items:center; gap:.5rem; font-size:.8rem; color:var(--grey); margin-bottom:2.5rem; }
.breadcrumb a { color:var(--grey); text-decoration:none; }
.breadcrumb a:hover { color:var(--navy); }
.breadcrumb-sep { color:#cbd5e1; }

.article-meta { display:flex; align-items:center; gap:.75rem; margin-bottom:1.25rem; flex-wrap:wrap; }
.article-tag { font-size:.65rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; padding:.25rem .6rem; border-radius:4px; background:#f0fdf4; color:#15803d; }
.article-date { font-size:.82rem; color:var(--grey); }
.article-updated { font-size:.78rem; color:var(--grey); display:flex; align-items:center; gap:.3rem; }
.article-updated::before { content:''; display:inline-block; width:6px; height:6px; border-radius:50%; background:#16a34a; flex-shrink:0; }
.article-title { font-size:clamp(1.75rem,4vw,2.25rem); font-weight:700; color:var(--navy); letter-spacing:-.025em; line-height:1.2; margin-bottom:1rem; }
.article-lead { font-size:1.1rem; color:var(--grey); line-height:1.75; border-left:3px solid var(--green); padding-left:1.25rem; margin-bottom:2.5rem; }
.article-cover { width:100%; height:auto; border-radius:10px; margin:0 0 2rem; display:block; }

.article-body p { font-size:.975rem; color:#334155; line-height:1.8; margin-bottom:1.25rem; }
.article-body h2 { font-size:1.1rem; font-weight:700; color:var(--navy); margin:2.5rem 0 .75rem; letter-spacing:-.015em; }
.article-body h3 { font-size:1rem; font-weight:700; color:var(--navy2); margin:1.75rem 0 .6rem; }
.article-body ul { margin:0 0 1.25rem 1.25rem; }
.article-body ol { margin:0 0 1.25rem 1.25rem; }
.article-body li { font-size:.975rem; color:#334155; line-height:1.8; margin-bottom:.4rem; }
.article-body strong { color:var(--navy); }

.callout { background:#f0fdf4; border:1px solid #bbf7d0; border-radius:10px; padding:1.25rem 1.5rem; margin:1.75rem 0; font-size:.925rem; color:#14532d; line-height:1.75; }
.callout strong { color:#15803d; }
.callout-warn { background:#fffbeb; border:1px solid #fde68a; border-radius:10px; padding:1.25rem 1.5rem; margin:1.75rem 0; font-size:.925rem; color:#78350f; line-height:1.75; }
.callout-warn strong { color:#92400e; }
.callout-info { background:#eff6ff; border:1px solid #bfdbfe; border-radius:10px; padding:1.25rem 1.5rem; margin:1.75rem 0; font-size:.925rem; color:#1e3a5f; line-height:1.75; }
.callout-info strong { color:#1d4ed8; }

.reason-block { border:1px solid var(--border); border-radius:10px; padding:1.1rem 1.4rem; margin-bottom:.75rem; }
.reason-block .reason-title { font-weight:700; font-size:.95rem; color:var(--navy); margin-bottom:.35rem; display:flex; align-items:center; gap:.5rem; }
.reason-block .reason-num { display:inline-flex; align-items:center; justify-content:center; width:22px; height:22px; border-radius:50%; background:var(--light); color:var(--navy2); font-size:.75rem; font-weight:700; flex-shrink:0; }
.reason-block .reason-desc { font-size:.9rem; color:#334155; line-height:1.75; margin:0; }

.path-block { border:1px solid var(--border); border-radius:10px; padding:1.25rem 1.5rem; margin-bottom:1rem; }
.path-block h3 { margin-top:0; margin-bottom:.6rem; font-size:.975rem; }
.path-block p { margin-bottom:.75rem; font-size:.9rem; }
.path-block p:last-child { margin-bottom:0; }
.path-block ul { margin-bottom:0; }
.path-block li { font-size:.9rem; }
.path-label { display:inline-block; font-size:.65rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; padding:.2rem .55rem; border-radius:4px; margin-bottom:.75rem; }
.path-label.appeal { background:#eff6ff; color:#1d4ed8; }
.path-label.reapply { background:#f0fdf4; color:#15803d; }

.faq-list { margin:1.5rem 0; }
.faq-item { border:1px solid var(--border); border-radius:8px; margin-bottom:.55rem; overflow:hidden; }
.faq-item summary { padding:.85rem 1.1rem; font-weight:600; font-size:.925rem; cursor:pointer; color:var(--navy); list-style:none; display:flex; justify-content:space-between; align-items:center; gap:.75rem; }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after { content:'+'; font-size:1.1rem; color:var(--grey); flex-shrink:0; }
.faq-item[open] summary::after { content:'−'; }
.faq-item p { padding:.75rem 1.1rem 1rem; font-size:.9rem; color:#334155; line-height:1.75; border-top:1px solid var(--border); margin:0; }

.related-articles { margin:3rem 0 2rem; }
.related-articles h3 { font-size:1rem; font-weight:700; color:var(--navy); margin-bottom:1rem; letter-spacing:-.01em; }
.related-grid { display:flex; flex-direction:column; gap:.6rem; }
.related-card { display:flex; flex-direction:column; gap:.25rem; text-decoration:none; border:1px solid var(--border); border-radius:10px; padding:.9rem 1.1rem; transition:border-color .2s,box-shadow .2s; }
.related-card:hover { border-color:#94a3b8; box-shadow:0 2px 8px rgba(0,0,0,.07); }
.related-cat { font-size:.63rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; color:#15803d; }
.related-name { font-size:.925rem; font-weight:600; color:var(--navy); line-height:1.4; }
.related-desc { font-size:.825rem; color:var(--grey); }

.cta-block { background:var(--navy); border-radius:14px; padding:2rem; margin:3rem 0 1rem; text-align:center; }
.cta-block h3 { color:white; font-size:1.25rem; font-weight:700; margin-bottom:.6rem; }
.cta-block p { color:rgba(255,255,255,.65); font-size:.925rem; margin-bottom:1.25rem; line-height:1.6; }
.cta-btn { display:inline-block; background:#E53935; color:white; font-size:.95rem; font-weight:700; padding:.7rem 2rem; border-radius:8px; text-decoration:none; transition:opacity .2s; }
.cta-btn:hover { opacity:.88; }

.article-readtime { font-size:.82rem; color:var(--grey); }

.author-box { border:1px solid var(--border); border-radius:10px; padding:1.25rem 1.5rem; margin:2.5rem 0 1rem; }
.author-box .author-name { font-weight:700; font-size:.95rem; color:var(--navy); margin-bottom:.4rem; }
.author-box .author-bio { font-size:.875rem; color:var(--grey); line-height:1.7; }

/* D5 — TOC, тільки для статей ≥1500 слів, див. artifacts/blog-tech-debt.md */
.toc { border:1px solid var(--border); border-radius:10px; padding:1.25rem 1.5rem; margin:0 0 2rem; }
.toc-title { font-size:.7rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--grey); margin-bottom:.6rem; }
.toc ul { list-style:none; margin:0; padding:0; }
.toc li { margin-bottom:.4rem; }
.toc a { font-size:.9rem; color:var(--navy2); text-decoration:none; }
.toc a:hover { text-decoration:underline; }

footer { background:var(--navy); padding:3rem 2rem 2rem; }
.footer-inner { max-width:1100px; margin:0 auto; display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:2rem; }
.footer-brand { font-weight:800; font-size:1.1rem; letter-spacing:-.02em; color:white; display:flex; align-items:center; gap:6px; }
.footer-brand em { font-style:normal; }
.footer-tagline { color:rgba(255,255,255,.4); font-size:.8rem; margin-top:.375rem; }
.footer-links { display:flex; gap:1.75rem; flex-wrap:wrap; align-items:center; }
.footer-links a { color:rgba(255,255,255,.45); text-decoration:none; font-size:.85rem; transition:color .2s; }
.footer-links a:hover { color:white; }
.footer-bottom { max-width:1100px; margin:1.75rem auto 0; padding-top:1.25rem; border-top:1px solid rgba(255,255,255,.08); font-size:.78rem; color:rgba(255,255,255,.25); text-align:center; }

  @media(max-width:640px) { .page-outer { padding:0 1.25rem; } }