/* ==========================================================================
   article.css — Long-form blog article layout.
   Global look from style.css; cred-card / guide-steps / guide-note styles
   come from how-it-works.css (also loaded); breadcrumb/FAQ from pricing.css.
   ========================================================================== */

/* ---------- Hero ---------- */
.article-hero { position: relative; overflow: hidden; padding: clamp(28px, 4vw, 56px) 0 clamp(20px, 3vw, 36px); }
.article-hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(55% 70% at 16% 10%, color-mix(in srgb, var(--blue) 20%, transparent) 0%, transparent 55%),
              radial-gradient(50% 70% at 90% 15%, var(--accent-soft) 0%, transparent 55%);
  background-size: 160% 160%, 160% 160%;
}
.article-hero .container { position: relative; z-index: 2; }
.article-hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(24px, 4vw, 48px); align-items: center; }
.article-cat-label { display: inline-flex; align-items: center; gap: 8px; font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.article-hero h1 { font-size: clamp(1.8rem, 4vw, 2.9rem); font-weight: 800; letter-spacing: -0.03em; margin: 14px 0 14px; }
.article-hero .article-intro { color: var(--text-soft); font-size: clamp(1rem, 1.5vw, 1.14rem); max-width: 620px; }
.article-meta-row { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 18px; color: var(--text-mute); font-size: .88rem; }
.article-meta-row span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta-row svg { color: var(--accent); }

/* Firestick visual */
.fire-visual { display: grid; place-items: center; }
.fire-stick {
  position: relative; width: 210px; height: 210px; border-radius: 28px;
  background: linear-gradient(160deg, var(--surface-solid), var(--bg-elev));
  border: 1px solid var(--border-strong); box-shadow: var(--shadow-lg);
  display: grid; place-items: center;
}
.fire-stick .bolt { color: var(--accent); filter: drop-shadow(0 6px 20px var(--accent-glow)); }
.fire-stick::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: radial-gradient(70% 70% at 70% 20%, var(--accent-glow) 0%, transparent 60%); opacity: .5; }

/* ---------- Layout: content + sticky TOC ---------- */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: clamp(28px, 4vw, 56px); align-items: start; }
.article-main { min-width: 0; }

/* TOC */
.toc { position: sticky; top: 96px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); backdrop-filter: blur(8px); padding: 20px; }
.toc h2 { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-mute); margin: 0 0 12px; }
.toc ol { list-style: none; counter-reset: toc; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.toc a { display: block; padding: 8px 10px; border-radius: 9px; color: var(--text-soft); font-size: .9rem; border-left: 2px solid transparent; }
.toc a:hover { color: var(--text); background: var(--surface-2); }
.toc a.is-active { color: var(--accent); background: var(--accent-soft); border-left-color: var(--accent); }

/* Mobile collapsible TOC */
.toc-mobile { display: none; margin-bottom: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.toc-mobile > summary { list-style: none; cursor: pointer; padding: 14px 18px; font-weight: 600; display: flex; align-items: center; justify-content: space-between; }
.toc-mobile > summary::-webkit-details-marker { display: none; }
.toc-mobile > summary .chev { transition: transform .2s ease; color: var(--text-mute); }
.toc-mobile[open] > summary .chev { transform: rotate(180deg); }
.toc-mobile ol { list-style: none; margin: 0; padding: 6px 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.toc-mobile a { display: block; padding: 9px 10px; border-radius: 8px; color: var(--text-soft); font-size: .92rem; }
.toc-mobile a:hover { background: var(--surface-2); color: var(--text); }

/* ---------- Prose ---------- */
.prose { max-width: 760px; }
.prose h2 { font-size: clamp(1.4rem, 2.6vw, 1.85rem); font-weight: 700; letter-spacing: -0.02em; margin: 40px 0 14px; scroll-margin-top: 100px; }
.prose h3 { font-size: 1.14rem; font-weight: 650; margin: 26px 0 8px; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text-soft); margin: 0 0 16px; line-height: 1.75; }
.prose a { color: var(--accent); font-weight: 500; }
.prose a:hover { text-decoration: underline; }
.prose ul, .prose ol.plain { margin: 0 0 18px; padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.prose ul li { position: relative; padding-left: 28px; color: var(--text-soft); line-height: 1.6; }
.prose ul li::before { content: ""; position: absolute; left: 6px; top: 10px; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.prose strong { color: var(--text); font-weight: 650; }

/* Troubleshooting blocks */
.trouble-block { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); padding: 18px 20px; margin: 0 0 14px; }
.trouble-block h3 { margin: 0 0 10px; font-size: 1.05rem; }
.trouble-block dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; }
.trouble-block dt { color: var(--text-mute); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 700; padding-top: 2px; white-space: nowrap; }
.trouble-block dd { margin: 0; color: var(--text-soft); font-size: .94rem; }

/* Share/nav footer of article */
.article-nav { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--border); }
.article-nav a { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: var(--radius-pill); border: 1px solid var(--border); color: var(--text-soft); font-size: .9rem; font-weight: 600; }
.article-nav a:hover { border-color: var(--accent); color: var(--accent); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 960px) {
  .article-hero-grid { grid-template-columns: 1fr; }
  .fire-visual { order: -1; }
  .article-layout { grid-template-columns: 1fr; }
  .toc-desktop { display: none; }
  .toc-mobile { display: block; }
  .prose { max-width: none; }
}
@media (max-width: 480px) {
  .fire-stick { width: 160px; height: 160px; }
  .trouble-block dl { grid-template-columns: 1fr; gap: 2px 0; }
  .trouble-block dt { margin-top: 8px; }
}