/* ============================================================
   FinvestAlgo Blog — v2 theme (dark listing, light reading pane)
   Brand: orange #F5A623 · blue #1E9BF0 · green #35B462
   ============================================================ */
:root{
  --bg:#080c14; --bg-2:#0d1320; --panel:#111827; --panel-2:#161f31; --line:rgba(255,255,255,.09);
  --text:#e9eef7; --muted:#93a0b8; --soft:#c3cde0;
  --blue:#1E9BF0; --blue-d:#1583cf; --orange:#F5A623; --green:#35B462; --red:#ef6a6a;
  --paper:#ffffff; --paper-bg:#f3f6fb; --ink:#1b2437; --ink-2:#4a566e; --ink-3:#7b879c; --rule:#e3e8f0;
  --radius:16px; --radius-sm:10px; --max:1180px; --read:760px; --head:68px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --ease:.22s ease;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--head) + 76px)}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
body.page-article{background:var(--paper-bg);color:var(--ink)}
a{color:var(--blue);text-decoration:none;transition:color var(--ease)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 22px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--orange);color:#111;padding:8px 14px;border-radius:8px;z-index:200;font-weight:600}
.skip:focus{left:12px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;height:var(--head);background:rgba(8,12,20,.97);backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:26px;height:var(--head)}
.logo{display:flex;align-items:center;flex-shrink:0}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px}
.main-nav a{color:var(--soft);font-size:.92rem;font-weight:500;padding:8px 14px;border-radius:999px;transition:all var(--ease)}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.07)}
.main-nav a.active{color:#fff;background:rgba(30,155,240,.16);box-shadow:inset 0 0 0 1px rgba(30,155,240,.4)}
.header-cta{margin-left:auto;display:inline-flex;align-items:center;gap:8px;background:var(--orange);color:#1a1205;font-weight:700;font-size:.88rem;padding:9px 18px;border-radius:999px;transition:transform var(--ease),box-shadow var(--ease)}
.header-cta:hover{color:#1a1205;transform:translateY(-1px);box-shadow:0 6px 22px rgba(245,166,35,.35)}
.hamburger{display:none;margin-left:auto;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:64px 0 38px;border-bottom:1px solid var(--line);
  background:radial-gradient(900px 340px at 78% -10%,rgba(30,155,240,.22),transparent 70%),radial-gradient(700px 300px at 8% 0%,rgba(245,166,35,.13),transparent 70%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:end}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.76rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--orange);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--orange);border-radius:2px}
.hero h1{font-size:clamp(2.2rem,5vw,3.4rem);line-height:1.08;font-weight:800;letter-spacing:-.03em;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero p.lead{color:var(--soft);font-size:1.05rem;max-width:560px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 6px 6px 18px;transition:border-color var(--ease),box-shadow var(--ease)}
.search-box:focus-within{border-color:rgba(30,155,240,.7);box-shadow:0 0 0 4px rgba(30,155,240,.15)}
.search-box svg{flex-shrink:0;color:var(--muted)}
.search-box input{flex:1;min-width:0;background:none;border:0;outline:0;color:var(--text);font:inherit;font-size:.96rem;padding:10px 0}
.search-box input::placeholder{color:var(--muted)}
.search-box button{background:var(--orange);color:#1a1205;border:0;border-radius:999px;font-weight:700;font-size:.88rem;padding:10px 20px;cursor:pointer}
.hero-topics{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.8rem;color:var(--muted)}
.hero-topics a{color:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px 12px;transition:all var(--ease)}
.hero-topics a:hover{border-color:var(--blue);color:#fff}

/* ---------- Category tabs ---------- */
.tabs-bar{position:sticky;top:var(--head);z-index:50;background:rgba(8,12,20,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.tabs{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{flex-shrink:0;display:inline-flex;align-items:center;gap:9px;background:var(--panel);color:var(--soft);border:1px solid var(--line);border-radius:999px;padding:9px 16px;font-size:.88rem;font-weight:600;cursor:pointer;transition:all var(--ease)}
.tab:hover{border-color:rgba(255,255,255,.25);color:#fff}
.tab .n{font-size:.72rem;background:rgba(255,255,255,.09);border-radius:999px;padding:1px 8px;color:var(--muted)}
.tab.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 6px 20px rgba(30,155,240,.3)}
.tab.on .n{background:rgba(255,255,255,.22);color:#fff}

/* ---------- Listing ---------- */
.list-wrap{padding-top:34px;padding-bottom:70px;min-height:50vh}
.result-info{color:var(--muted);font-size:.9rem;margin-bottom:22px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.result-info strong{color:var(--text)}
.link-btn{background:none;border:1px solid var(--line);color:var(--soft);border-radius:999px;padding:4px 14px;font-size:.8rem;cursor:pointer}
.link-btn:hover{border-color:var(--blue);color:#fff}
.chip{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.03em;padding:4px 11px;border-radius:999px;background:rgba(30,155,240,.14);color:#7cc6f8;border:1px solid rgba(30,155,240,.28);text-transform:none}
.chip.alt{background:rgba(245,166,35,.12);color:#f8c36a;border-color:rgba(245,166,35,.28)}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;color:var(--muted);font-size:.82rem}
.meta span{display:inline-flex;align-items:center;gap:6px}
.meta svg{opacity:.8}

.featured{display:grid;grid-template-columns:1.3fr 1fr;background:var(--panel);border:1px solid var(--line);border-radius:22px;overflow:hidden;margin-bottom:26px;transition:border-color var(--ease),transform var(--ease)}
.featured:hover{border-color:rgba(30,155,240,.5);transform:translateY(-2px)}
.featured .thumb{position:relative;min-height:0;aspect-ratio:1200/630;background:var(--panel-2);overflow:hidden}
.featured .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s}
.featured:hover .thumb img{transform:scale(1.04)}
.featured .body{padding:22px 30px;display:flex;flex-direction:column;justify-content:center;gap:11px}
.featured .tag-badge{align-self:flex-start;font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:#1a1205;background:var(--orange);border-radius:6px;padding:3px 9px}
.featured h2{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.2;letter-spacing:-.02em;font-weight:800}
.featured h2 a{color:#fff}
.featured p{color:var(--soft)}
.chips{display:flex;flex-wrap:wrap;gap:8px}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
.card:hover{transform:translateY(-4px);border-color:rgba(30,155,240,.5);box-shadow:0 18px 40px rgba(0,0,0,.35)}
.card .thumb{position:relative;aspect-ratio:16/9;background:var(--panel-2);overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:11px;flex:1}
.card h2,.card h3{font-size:1.14rem;line-height:1.35;font-weight:700;letter-spacing:-.01em}
.card h2 a,.card h3 a{color:#fff}
.card h2 a::after,.card h3 a::after,.featured h2 a::after{content:"";position:absolute;inset:0}
.card,.featured{position:relative}
.card p{color:var(--muted);font-size:.92rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .meta{margin-top:auto;padding-top:6px}
.empty{grid-column:1/-1;text-align:center;padding:70px 20px;border:1px dashed var(--line);border-radius:var(--radius);color:var(--muted)}
.empty strong{color:var(--text)}

.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:40px;flex-wrap:wrap}
.pagination button{min-width:42px;height:42px;padding:0 14px;background:var(--panel);color:var(--soft);border:1px solid var(--line);border-radius:999px;font-weight:600;cursor:pointer;transition:all var(--ease)}
.pagination button:hover:not(:disabled){border-color:var(--blue);color:#fff}
.pagination button.on{background:var(--blue);border-color:var(--blue);color:#fff}
.pagination button:disabled{opacity:.4;cursor:default}

/* ---------- Footer ---------- */
.site-footer{background:#05080e;border-top:1px solid var(--line);margin-top:0;color:var(--muted);font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;padding:54px 0 36px}
.footer-brand p{margin-top:14px;max-width:340px}
.site-footer h4{color:#fff;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
.site-footer li{margin-bottom:10px}
.site-footer li a{color:var(--muted)}
.site-footer li a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:10px 30px;justify-content:space-between;font-size:.8rem}
.footer-bottom .risk{max-width:760px}

/* ============================================================
   ARTICLE PAGE
   ============================================================ */
.article-hero{background:radial-gradient(900px 300px at 80% -20%,rgba(30,155,240,.22),transparent 70%),radial-gradient(600px 260px at 5% 0%,rgba(245,166,35,.12),transparent 70%),var(--bg);color:var(--text);padding:46px 0 64px;border-bottom:1px solid var(--line)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.84rem;color:var(--muted);margin-bottom:22px}
.crumbs a{color:var(--soft)}
.crumbs a:hover{color:#fff}
.crumbs .sep{opacity:.5}
.article-hero .chips{margin-bottom:16px}
.article-hero h1{font-size:clamp(1.8rem,4vw,2.9rem);line-height:1.14;letter-spacing:-.025em;font-weight:800;max-width:900px;margin-bottom:20px;color:#fff}
.article-hero .meta{font-size:.9rem}
.avatar{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--blue));display:inline-flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:.8rem}
.cover{max-width:var(--max);margin:-40px auto 0;padding:0 22px}
.cover-img{border-radius:20px;overflow:hidden;border:1px solid var(--rule);box-shadow:0 24px 60px rgba(15,25,50,.22);background:#0d1320;aspect-ratio:1200/630}
.cover-img img{width:100%;height:100%;object-fit:cover}

.article-wrap{display:grid;grid-template-columns:minmax(0,var(--read)) 300px;gap:44px;justify-content:center;max-width:var(--max);margin:0 auto;padding:40px 22px 70px;align-items:start}
.paper{background:var(--paper);border:1px solid var(--rule);border-radius:22px;padding:44px 48px;box-shadow:0 2px 0 rgba(15,25,50,.03)}
.aside-sticky{position:sticky;top:calc(var(--head) + 20px);display:flex;flex-direction:column;gap:18px}
.side-card{background:var(--paper);border:1px solid var(--rule);border-radius:16px;padding:20px 20px 18px}
.side-card h4{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}
.toc{display:flex;flex-direction:column;gap:2px;max-height:56vh;overflow:auto}
.toc a{display:block;color:var(--ink-2);font-size:.86rem;line-height:1.4;padding:7px 10px;border-left:2px solid var(--rule);transition:all var(--ease)}
.toc a:hover{color:var(--blue-d);border-color:var(--blue)}
.toc a.on{color:var(--blue-d);border-color:var(--blue);background:rgba(30,155,240,.07);font-weight:600}
.cta-card{background:linear-gradient(160deg,#0d1627,#142543);color:#fff;border:0}
.cta-card h4{color:#9fb3d6}
.cta-card p{color:#c9d6ee;font-size:.9rem;margin-bottom:14px}
.cta-card .go{display:block;text-align:center;background:var(--orange);color:#1a1205;font-weight:800;font-size:.84rem;padding:11px 8px;border-radius:999px}
.cta-card .go:hover{color:#1a1205;filter:brightness(1.06)}
.toc-mobile{display:none;background:var(--paper-bg);border:1px solid var(--rule);border-radius:12px;padding:4px 16px;margin-bottom:26px}
.toc-mobile summary{cursor:pointer;font-weight:700;font-size:.9rem;padding:12px 0;color:var(--ink)}
.toc-mobile .toc{padding-bottom:12px;max-height:none}

.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--orange),var(--blue));z-index:300}

/* ---- post body typography (light paper) ---- */
.post-body{color:var(--ink-2);font-size:1.04rem;line-height:1.8}
.post-body>*:first-child{margin-top:0}
.post-body h2{color:var(--ink);font-size:1.62rem;line-height:1.25;letter-spacing:-.02em;font-weight:800;margin:2.3em 0 .7em;padding-top:.3em}
.post-body h2:first-child{margin-top:0}
.post-body h3{color:var(--ink);font-size:1.18rem;line-height:1.35;font-weight:700;margin:1.8em 0 .5em}
.post-body h4{color:var(--ink);font-size:1rem;font-weight:700;margin:1.4em 0 .4em}
.post-body p{margin:0 0 1.1em}
.post-body strong{color:var(--ink);font-weight:700}
.post-body a{color:var(--blue-d);text-decoration:underline;text-decoration-color:rgba(30,155,240,.35);text-underline-offset:3px}
.post-body a:hover{text-decoration-color:var(--blue)}
.post-body ul,.post-body ol{margin:0 0 1.2em;padding-left:1.3em}
.post-body ul{list-style:disc}
.post-body ol{list-style:decimal}
.post-body li{margin:.35em 0;padding-left:.2em}
.post-body li::marker{color:var(--blue)}
.post-body img{border-radius:12px;margin:1.4em auto}
.post-body code{background:#eef2f9;color:#1b2f5b;padding:2px 6px;border-radius:6px;font-size:.88em}
.post-body pre{background:#0f1729;color:#e5ecfa;padding:16px 18px;border-radius:12px;overflow:auto;margin:0 0 1.2em}
.post-body .label{font-weight:700;color:var(--ink);margin:1.2em 0 .4em}
.post-body .tagline{font-weight:800;color:var(--ink);font-size:1.15rem;border-left:4px solid var(--orange);padding:6px 0 6px 16px;margin:1.6em 0}

.post-body .callout{display:flex;gap:14px;padding:16px 18px;border-radius:12px;margin:1.4em 0;border:1px solid}
.post-body .callout p{margin:0;font-size:.97rem;line-height:1.65}
.post-body .callout-label{flex-shrink:0;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;border-radius:6px;padding:3px 9px;height:fit-content;margin-top:3px}
.post-body .callout-warn{background:#fff8ea;border-color:#f6dca4}
.post-body .callout-warn .callout-label{background:#f5a623;color:#2b1c00}
.post-body .callout-warn p,.post-body .callout-warn p strong{color:#5b4210}
.post-body .callout-tip{background:#eef7ff;border-color:#bfe0fa}
.post-body .callout-tip .callout-label{background:var(--blue);color:#fff}
.post-body .callout-tip p{color:#1d4467}

.post-body .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:1.4em 0}
.post-body .btn-cta{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;text-decoration:none;font-weight:700;font-size:.92rem;padding:12px 22px;border-radius:999px;transition:all var(--ease)}
.post-body .btn-cta:hover{background:var(--blue-d);color:#fff;transform:translateY(-1px);box-shadow:0 8px 22px rgba(30,155,240,.3)}
.post-body .btn-cta::after{content:"→"}
.post-body .cta-row .btn-cta:nth-child(n+2){background:#fff;color:var(--blue-d);box-shadow:inset 0 0 0 1.5px var(--blue)}
.post-body .cta-row .btn-cta:nth-child(n+2):hover{background:rgba(30,155,240,.08)}

.post-body .flow{display:flex;flex-wrap:wrap;gap:10px;margin:1.6em 0;padding:20px;background:linear-gradient(160deg,#0d1627,#14233f);border-radius:16px;counter-reset:f}
.post-body .flow-node{display:flex;align-items:center;gap:10px;margin:0;padding:10px 14px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:12px;color:#fff;font-weight:600;font-size:.86rem;line-height:1.3;position:relative;flex:1 1 140px}
.post-body .flow-node::marker{content:""}
.post-body .flow-node:not(:last-child)::after{content:"→";position:absolute;right:-13px;top:50%;transform:translateY(-50%);color:var(--orange);font-weight:800;background:#101d35;border-radius:50%;width:16px;height:16px;line-height:16px;text-align:center;font-size:.78rem;z-index:2}
.post-body .flow-idx{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--orange);color:#1a1205;font-size:.72rem;font-weight:800;display:inline-flex;align-items:center;justify-content:center}
.post-body .flow li{list-style:none;padding-left:14px}

.post-body .step-card,.post-body .problem-card{border:1px solid var(--rule);border-radius:16px;padding:6px 24px 14px;margin:1.3em 0;background:#fbfcfe}
.post-body .step-card{border-left:4px solid var(--blue)}
.post-body .problem-card{border-left:4px solid var(--orange)}
.post-body .step-title,.post-body .problem-title{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:.9em 0 .6em;font-size:1.12rem}
.post-body .step-badge,.post-body .problem-badge{font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;font-weight:800;border-radius:999px;padding:4px 12px}
.post-body .step-badge{background:var(--blue);color:#fff}
.post-body .problem-badge{background:#fdeacb;color:#7a4a00}
.post-body .step-card>*:last-child,.post-body .problem-card>*:last-child{margin-bottom:0}

.post-body .checklist{list-style:none;padding:0;margin:1em 0 1.4em}
.post-body .checklist li{position:relative;padding:11px 14px 11px 46px;margin:8px 0;background:#f6f9fd;border:1px solid var(--rule);border-radius:10px}
.post-body .checklist li::before{content:"";position:absolute;left:15px;top:50%;width:18px;height:18px;margin-top:-9px;border:2px solid var(--green);border-radius:5px}
.post-body .checklist li::after{content:"";position:absolute;left:21px;top:50%;width:5px;height:9px;margin-top:-6px;border:solid var(--green);border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}

.post-body .table-wrap{overflow-x:auto;margin:1.4em 0;border:1px solid var(--rule);border-radius:14px}
.post-body table{width:100%;border-collapse:collapse;font-size:.94rem;min-width:520px}
.post-body th{background:#0f1a2f;color:#fff;text-align:left;font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;padding:13px 18px}
.post-body td{padding:13px 18px;border-top:1px solid var(--rule);vertical-align:top;color:var(--ink-2)}
.post-body tbody tr:nth-child(even) td{background:#f8fafd}

.post-body .faq{border:1px solid var(--rule);border-radius:12px;margin:10px 0;background:#fff;overflow:hidden}
.post-body .faq summary{cursor:pointer;list-style:none;font-weight:700;color:var(--ink);padding:16px 54px 16px 20px;position:relative;line-height:1.45}
.post-body .faq summary::-webkit-details-marker{display:none}
.post-body .faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:#eef4fc;color:var(--blue-d);display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700}
.post-body .faq[open] summary::after{content:"–"}
.post-body .faq[open] summary{border-bottom:1px solid var(--rule);background:#f9fbfe}
.post-body .faq-a{padding:16px 20px 6px}
.post-body .faq-a p:last-child{margin-bottom:10px}

.post-body .disclaimer{margin-top:2.6em;padding:22px 24px;background:#f5f7fb;border:1px solid var(--rule);border-radius:14px}
.post-body .disclaimer h2{font-size:1.05rem;margin:0 0 .6em;padding:0;letter-spacing:0}
.post-body .disclaimer p{font-size:.88rem;color:var(--ink-3);line-height:1.7}
.post-body .disclaimer p:last-child{margin-bottom:0}

.post-foot{margin-top:2.4em;padding-top:1.6em;border-top:1px solid var(--rule)}
.post-tags{display:flex;flex-wrap:wrap;gap:8px}
.post-tag{font-size:.78rem;color:var(--ink-2);background:#eef2f9;border-radius:999px;padding:5px 13px;transition:all var(--ease)}
.post-tag:hover{background:var(--blue);color:#fff}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.post-nav-link{display:block;border:1px solid var(--rule);border-radius:14px;padding:16px 18px;background:#fff;color:var(--ink);transition:all var(--ease)}
.post-nav-link:hover{border-color:var(--blue);transform:translateY(-2px)}
.post-nav-link.next{text-align:right}
.post-nav-label{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:4px}
.post-nav-title{font-weight:700;font-size:.95rem;line-height:1.35}

.related{max-width:var(--max);margin:0 auto;padding:0 22px 70px}
.related h2{font-size:1.4rem;font-weight:800;color:var(--ink);margin-bottom:20px;letter-spacing:-.02em}
.related .grid .card{background:#fff;border-color:var(--rule)}
.related .grid .card h3 a{color:var(--ink)}
.related .grid .card p{color:var(--ink-3)}
.related .grid .card .meta{color:var(--ink-3)}
.related .grid .card:hover{box-shadow:0 18px 40px rgba(15,25,50,.14)}
.post-loading,.post-error{max-width:var(--read);margin:90px auto;text-align:center;color:var(--ink-3);padding:0 22px}
.post-error h2{color:var(--ink);margin-bottom:8px}
.page-article .site-footer{margin-top:0}

/* ---------- Responsive ---------- */
@media(max-width:1020px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
  .featured .thumb{min-height:0;aspect-ratio:16/9}
  .hero-grid{grid-template-columns:1fr;gap:26px}
  .article-wrap{grid-template-columns:minmax(0,1fr)}
  .aside-sticky{position:static}
  .aside-sticky .toc-card{display:none}
  .toc-mobile{display:block}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  :root{--head:60px}
  .main-nav,.header-cta{display:none}
  .hamburger{display:flex}
  body.nav-open .main-nav{display:flex;position:absolute;left:0;right:0;top:var(--head);flex-direction:column;align-items:stretch;background:var(--bg);padding:14px 22px 20px;border-bottom:1px solid var(--line);margin:0}
  body.nav-open .main-nav a{padding:12px 14px}
  .hero{padding:44px 0 28px}
  .grid{grid-template-columns:1fr}
  .featured .body{padding:24px 22px}
  .paper{padding:26px 20px;border-radius:16px}
  .post-body{font-size:1rem}
  .post-body h2{font-size:1.35rem}
  .post-body .step-card,.post-body .problem-card{padding:2px 16px 12px}
  .post-body .flow{flex-direction:column}
  .post-body .flow-node{flex:0 0 auto}
  .post-body .flow-node:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-14px;transform:translateX(-50%)}
  .post-nav{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding-top:38px}
  .cover{margin-top:-26px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}