/* ===== Echo blog post ===== */
  .post-hero{position:relative;z-index:1;max-width:720px;margin:0 auto;padding:clamp(120px,18vh,168px) 24px 6px}
  .cat-pill{display:inline-block;font-family:var(--font-body);font-weight:600;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-deep);background:var(--sage-soft);border:1px solid color-mix(in srgb,var(--accent) 18%,transparent);padding:5px 12px;border-radius:999px;margin-bottom:18px}
  .post-hero h1{font-family:var(--font-display);font-weight:600;font-size:clamp(30px,4.8vw,46px);letter-spacing:-.03em;line-height:1.08;color:var(--ink1);margin:0;text-wrap:balance}
  .post-hero h1 em{font-style:normal;color:var(--accent-deep)}
  .post-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13.5px;color:var(--ink3);margin-top:18px}
  .post-meta .dot{opacity:.5}
  .post-deck{font-size:clamp(17px,2.1vw,20px);line-height:1.55;color:var(--ink2);margin:22px 0 0;text-wrap:pretty}

  .article{position:relative;z-index:1;max-width:720px;margin:0 auto;padding:8px 24px clamp(40px,7vh,72px)}
  .article p{font-size:17px;line-height:1.72;color:var(--ink2);margin:20px 0}
  .article h2{font-family:var(--font-display);font-weight:600;font-size:clamp(22px,3vw,28px);letter-spacing:-.02em;color:var(--ink1);margin:42px 0 12px;line-height:1.16}
  .article h3{font-family:var(--font-display);font-weight:600;font-size:19px;letter-spacing:-.01em;color:var(--ink1);margin:30px 0 8px}
  .article a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}
  .article a:hover{color:var(--accent)}
  .article strong{color:var(--ink1);font-weight:600}
  .article ul,.article ol{margin:18px 0;padding-left:22px;color:var(--ink2);font-size:17px;line-height:1.7}
  .article li{margin:9px 0}
  .article code{font-family:var(--font-mono);font-size:14px;background:var(--paper-2);border:1px solid var(--hairline);border-radius:6px;padding:1px 6px;color:var(--ink1)}

  .cmp-wrap{margin:28px 0;overflow-x:auto}
  .cmp-table{width:100%;border-collapse:collapse;font-size:15px;min-width:420px}
  .cmp-table th,.cmp-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--hairline);vertical-align:top}
  .cmp-table thead th{font-family:var(--font-display);font-weight:600;color:var(--ink1);font-size:14px}
  .cmp-table tbody th{font-weight:500;color:var(--ink2);font-size:14.5px}
  .cmp-table .col-echo{background:var(--sage-soft)}
  .cmp-table thead .col-echo{color:var(--accent-deep)}
  .cmp-table .yes{color:var(--accent-deep);font-weight:600}
  .cmp-table .no{color:var(--ink4)}

  .callout{display:flex;gap:14px;align-items:flex-start;margin:28px 0;padding:18px 20px;border-radius:16px;background:var(--card);border:1px solid var(--hairline);box-shadow:0 1px 2px rgba(20,40,32,.04)}
  .callout .ic{flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center}
  .callout .ic svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
  .callout .bd b{display:block;font-family:var(--font-body);font-weight:600;color:var(--ink1);margin-bottom:3px;font-size:15px}
  .callout .bd p{margin:0;font-size:14.5px;line-height:1.55;color:var(--ink2)}
  .callout.tip{background:var(--sage-soft);border-color:color-mix(in srgb,var(--accent) 16%,transparent)}
  .callout.tip .ic{background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent-deep)}
  .callout.info .ic{background:color-mix(in srgb,#48b1bf 18%,transparent);color:#2b8f9c}

  .faq{max-width:720px;margin:48px auto 0;padding:0 24px}
  .faq h2{font-family:var(--font-display);font-weight:600;font-size:clamp(22px,3vw,28px);letter-spacing:-.02em;color:var(--ink1);margin:0 0 8px}
  .faq details{border-top:1px solid var(--hairline)}
  .faq details:last-of-type{border-bottom:1px solid var(--hairline)}
  .faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:14px;align-items:center;padding:17px 0;font-family:var(--font-body);font-weight:600;font-size:16px;color:var(--ink1)}
  .faq summary::-webkit-details-marker{display:none}
  .faq .pm{position:relative;flex:none;width:14px;height:14px;margin-top:3px}
  .faq .pm::before,.faq .pm::after{content:"";position:absolute;background:var(--accent-deep);border-radius:2px;transition:transform .25s var(--ease-out)}
  .faq .pm::before{left:0;right:0;top:6px;height:2px}
  .faq .pm::after{top:0;bottom:0;left:6px;width:2px}
  .faq details[open] .pm::after{transform:scaleY(0)}
  .faq .ans{padding:0 0 18px;color:var(--ink2);font-size:15.5px;line-height:1.62;max-width:62ch}

  .related{max-width:720px;margin:48px auto 0;padding:28px 24px 0;border-top:1px solid var(--hairline)}
  .related h2{font-family:var(--font-display);font-weight:600;font-size:18px;letter-spacing:-.01em;color:var(--ink1);margin:0 0 10px}
  .related ul{list-style:none;padding:0;margin:0}
  .related a{display:flex;align-items:center;gap:9px;padding:11px 0;color:var(--ink1);font-weight:500;font-size:15.5px;text-decoration:none;transition:color .15s,transform .15s}
  .related a::before{content:"";width:6px;height:6px;border-right:2px solid var(--accent);border-top:2px solid var(--accent);transform:rotate(45deg);flex:none;opacity:.7}
  .related a:hover{color:var(--accent-deep);transform:translateX(2px)}

  .authorbox{max-width:720px;margin:36px auto 0;display:flex;gap:15px;align-items:flex-start;padding:20px 22px;border-radius:16px;background:var(--card);border:1px solid var(--hairline);box-shadow:0 1px 2px rgba(20,40,32,.04)}
  .authorbox .echo-mark{font-size:24px;flex:none;margin-top:2px}
  .authorbox b{display:block;color:var(--ink1);font-size:15px;margin-bottom:4px}
  .authorbox p{margin:0;font-size:14px;line-height:1.55;color:var(--ink2)}

  .cta{max-width:720px;margin:40px auto 0;text-align:center;padding:36px 28px;border-radius:var(--radius);background:linear-gradient(180deg,var(--sage-soft),var(--card));border:1px solid color-mix(in srgb,var(--accent) 22%,transparent);box-shadow:0 1px 2px rgba(20,40,32,.04),0 18px 44px rgba(20,40,32,.06)}
  .cta h2{font-family:var(--font-display);font-weight:600;font-size:clamp(22px,3vw,28px);letter-spacing:-.02em;color:var(--ink1);margin:0 0 8px}
  .cta>p{color:var(--ink2);font-size:16px;line-height:1.5;margin:0 auto 22px;max-width:46ch}
  .cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
  .cta-btn{font-family:var(--font-body);font-weight:600;font-size:15px;border-radius:999px;padding:13px 24px;text-decoration:none !important;transition:transform .15s,box-shadow .15s}
  .cta-btn.primary{color:#fff;background:linear-gradient(180deg,var(--sage-bright),var(--accent-deep));box-shadow:0 3px 10px rgba(95,154,136,.4),inset 0 1px 0 rgba(255,255,255,.28)}
  .cta-btn.primary:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(95,154,136,.5),inset 0 1px 0 rgba(255,255,255,.28)}
  .cta-btn.ghost{color:var(--ink1);background:var(--card);border:1px solid var(--hairline)}
  .cta-btn.ghost:hover{transform:translateY(-1px);box-shadow:0 5px 14px rgba(20,45,35,.12)}
  .cta-note{display:block;margin-top:14px;font-size:13px;color:var(--ink3)}

  .back-wrap{max-width:720px;margin:36px auto 0;padding:0 24px}
  .back-btn{display:inline-flex;align-items:center;gap:8px;color:var(--ink2);font-weight:600;font-size:14.5px;text-decoration:none;transition:color .15s}
  .back-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  .back-btn:hover{color:var(--accent-deep)}