/* ==========================================================================
   Undersign — Blog styles (list + single post)
   Loaded after base.css and docs-shell.css. Uses only design-guide tokens.
   ========================================================================== */

/* --- Post listing page --- */
.blog-hero{padding:72px 0 32px;}
.blog-hero .page-eyebrow{background:none;padding:0;border-radius:0;}
.blog-title{font-family:var(--font-display);font-weight:500;font-size:clamp(2.1rem,4.5vw,3rem);line-height:1.08;color:var(--ink);margin:0 0 14px;letter-spacing:-0.01em;}
.blog-title em{font-family:var(--font-display);font-style:italic;color:var(--teal-700);font-weight:500;}
.blog-hero .lede{max-width:640px;margin:0;}
.blog-hero-divider{border:none;border-top:1px solid var(--line);}

.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:48px 0 90px;}
.post-card{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:26px;text-decoration:none;transition:transform .3s var(--silk),box-shadow .3s var(--silk),border-color .3s var(--silk);}
.post-card:hover{transform:translateY(-4px);box-shadow:0 30px 70px -30px rgba(11,54,48,0.28);border-color:var(--seafoam-200);}
.post-card .post-tag{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--teal-600);margin-bottom:14px;}
.post-card h3{margin:0 0 10px;font-size:1.15rem;line-height:1.3;color:var(--ink);font-weight:600;}
.post-card:hover h3{color:var(--teal-700);}
.post-card .post-excerpt{margin:0 0 18px;font-size:0.94rem;color:var(--ink-soft);line-height:1.6;}
.post-card .post-meta{margin-top:auto;display:flex;align-items:center;justify-content:flex-end;gap:10px;padding-top:16px;border-top:1px solid var(--line);font-family:var(--font-mono);font-size:0.72rem;color:var(--ink-faint);}
.post-card .read{color:var(--teal-700);font-weight:500;display:inline-flex;align-items:center;gap:5px;}

/* --- Single post layout --- */
.blog-post .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:12.5px;color:var(--ink-faint);margin-bottom:20px;}
.blog-post .crumb a{color:var(--ink-faint);text-decoration:none;}
.blog-post .crumb a:hover{color:var(--teal-700);}
.blog-post .crumb svg{width:11px;height:11px;}
.post-title{font-family:var(--font-display);font-weight:500;font-size:clamp(2rem,4vw,2.8rem);line-height:1.1;color:var(--ink);margin:0 0 12px;letter-spacing:-0.01em;}
.post-title em{font-family:var(--font-display);font-style:italic;font-weight:500;color:var(--teal-700);}
.post-standfirst{font-size:1.1rem;line-height:1.6;color:var(--ink-soft);margin:0 0 24px;max-width:640px;}
.post-byline{display:flex;align-items:center;gap:10px;padding-bottom:20px;border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:0.78rem;color:var(--ink-faint);}
.post-byline .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong);}
.post-body{margin-top:30px;}
.post-body h2{font-family:var(--font-display);font-weight:500;font-size:1.6rem;color:var(--ink);margin:40px 0 14px;letter-spacing:-0.01em;scroll-margin-top:84px;}
.post-body h3{font-family:var(--font-body);font-weight:600;font-size:1.2rem;color:var(--ink);margin:28px 0 10px;}
.post-body p{color:var(--ink);margin:0 0 18px;line-height:1.7;}
.post-body ul,.post-body ol{margin:0 0 18px;padding-left:22px;color:var(--ink);}
.post-body li{margin:0 0 8px;}
.post-body a{color:var(--teal-700);text-decoration:underline;text-underline-offset:3px;}
.post-body blockquote{margin:26px 0;padding:4px 0 4px 20px;border-left:3px solid var(--teal-500);font-family:var(--font-display);font-style:italic;font-size:1.2rem;color:var(--teal-800);}
.post-body code.inline{font-family:var(--font-mono);background:var(--seafoam-100);border:1px solid var(--line);padding:2px 6px;border-radius:5px;color:var(--teal-800);font-size:0.9em;}
.post-foot{margin-top:48px;padding-top:26px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;}
.post-foot .btn{font-size:0.85rem;padding:10px 18px;}

@media(max-width:920px){.blog-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:640px){.blog-grid{grid-template-columns:1fr;}}
@media(max-width:860px){.blog-doc-main{padding:32px 22px 80px;}.blog-index-main{padding:28px 22px 70px;}}

/* --- Enterprise index with sidebar --- */
/* --- Docs-style shell: extreme-left sidebar, centred content, extreme-right rail --- */
.blog-doc-main{padding:40px 40px 100px;max-width:840px;min-width:0;}
.blog-doc-shell>*{min-width:0;}
.blog-sidebar{display:grid;gap:18px;align-content:start;}
.blog-index-shell{grid-template-columns:280px minmax(0,1fr);}
.blog-index-main{padding:36px 48px 90px;min-width:0;max-width:1040px;}
.blog-index-main .blog-grid{padding:24px 0 0;}
.blog-featured{margin:26px 0 8px;background:var(--white);border:1px solid var(--line);border-radius:18px;padding:30px;text-decoration:none;display:block;}
.blog-featured:hover{border-color:var(--seafoam-200);box-shadow:0 30px 70px -30px rgba(11,54,48,0.28);}
.blog-featured h2{font-size:clamp(1.5rem,3vw,2rem);margin:10px 0;}
.blog-featured p{color:var(--ink-soft);margin:0 0 16px;line-height:1.6;}
.side-widget{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:20px;}
.side-widget h4{margin:0 0 12px;font-family:var(--font-mono);font-size:0.72rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--teal-600);}
.side-cluster-list,.side-popular,.side-docs-links{list-style:none;margin:0;padding:0;display:grid;gap:2px;}
.side-cluster-list a{display:flex;justify-content:space-between;gap:8px;padding:8px 10px;border-radius:8px;text-decoration:none;font-size:0.88rem;color:var(--ink-soft);}
.side-cluster-list a:hover{background:var(--seafoam-100);color:var(--teal-800);}
.side-cluster-list a.active{background:var(--seafoam-100);color:var(--teal-700);font-weight:600;}
.side-cluster-list span{font-family:var(--font-mono);font-size:0.72rem;color:var(--ink-faint);}
.side-popular a,.side-docs-links a{display:block;padding:7px 10px;border-radius:8px;font-size:0.88rem;color:var(--ink-soft);text-decoration:none;line-height:1.45;}
.side-popular a:hover,.side-docs-links a:hover{background:var(--seafoam-100);color:var(--teal-800);}
.side-cta{background:var(--teal-900);border-color:var(--teal-900);color:var(--code-text);}
.side-cta strong{font-family:var(--font-display);font-size:1.15rem;font-weight:500;}
.side-cta p{font-size:0.88rem;color:var(--code-muted);margin:8px 0 14px;}
.side-cta .btn{width:100%;justify-content:center;}

/* --- Article rail (docs .doc-rail provides sticky positioning) --- */
.blog-rail{display:grid;gap:18px;align-content:start;min-width:0;}
.blog-toc{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:20px;font-size:0.85rem;}
.rail-cta{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:0 2px 8px rgba(11,54,48,0.04);}
.rail-cta-tag{display:block;font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--teal-600);margin-bottom:6px;font-weight:600;}
.rail-cta strong,.rail-cta-title{font-family:var(--font-display);font-size:1.05rem;font-weight:500;color:var(--ink);display:block;line-height:1.35;margin:0 0 6px;}
.rail-cta p,.rail-cta-text{font-size:0.82rem;color:var(--ink-soft);margin:0 0 14px;line-height:1.5;}
.rail-cta-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:8px 12px;font-size:0.82rem;font-weight:600;color:#fff!important;background:var(--teal-700);border:1px solid var(--teal-700);border-radius:8px;text-decoration:none;transition:background .2s ease,border-color .2s ease;}
.rail-cta-btn:hover{background:var(--teal-800);border-color:var(--teal-800);}
.rail-cta-link{display:inline-flex;align-items:center;gap:4px;font-size:0.84rem;font-weight:600;color:var(--teal-700);text-decoration:none;transition:color .2s ease;}
.rail-cta-link:hover{color:var(--teal-800);text-decoration:underline;}
.rail-cta .btn{width:100%;justify-content:center;margin-top:6px;font-size:0.82rem;padding:8px 12px;border-radius:8px;}
.rail-cta .btn-primary{background:var(--teal-700);color:#fff;}
.rail-cta .btn-ghost{color:var(--teal-700);border:1px solid var(--line);background:transparent;}
.rail-cta .btn-ghost:hover{background:var(--seafoam-100);color:var(--teal-800);}
.blog-toc strong{font-family:var(--font-mono);font-size:0.7rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--teal-600);display:block;margin-bottom:10px;}
.blog-toc ol{list-style:none;margin:0;padding:0;display:grid;gap:6px;}
.blog-toc a{color:var(--ink-soft);text-decoration:none;line-height:1.4;}
.blog-toc a:hover{color:var(--teal-700);}
.post-body table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:0.92rem;}
.post-body th,.post-body td{text-align:left;padding:10px 12px;border:1px solid var(--line);vertical-align:top;}
.post-body th{background:var(--seafoam-100);font-family:var(--font-mono);font-size:0.75rem;letter-spacing:0.04em;text-transform:uppercase;color:var(--teal-700);}
.post-body .checklist{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:8px;}
.post-body .checklist li{position:relative;padding:12px 14px 12px 40px;background:var(--white);border:1px solid var(--line);border-radius:10px;margin:0;}
.post-body .checklist li::before{content:"✓";position:absolute;left:14px;top:12px;color:var(--teal-600);font-weight:700;}
.post-body .callout{background:var(--white);border:1px solid var(--line);border-left:3px solid var(--teal-500);border-radius:0 12px 12px 0;padding:14px 18px;margin:0 0 20px;}
.post-body .callout p{margin:0;font-size:0.95rem;}
.post-body .steps{counter-reset:step;margin:0 0 20px;padding:0;list-style:none;display:grid;gap:10px;}
.post-body .steps li{counter-increment:step;position:relative;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:14px 16px 14px 52px;margin:0;}
.post-body .steps li::before{content:counter(step);position:absolute;left:16px;top:14px;width:24px;height:24px;border-radius:50%;background:var(--teal-700);color:#fff;font-family:var(--font-mono);font-size:0.75rem;display:flex;align-items:center;justify-content:center;}
.post-body .faq{margin:28px 0 36px;display:grid;gap:12px;}
.post-body .faq details{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:0;transition:border-color .25s var(--silk),box-shadow .25s var(--silk);overflow:hidden;}
.post-body .faq details:hover{border-color:var(--teal-500);}
.post-body .faq details[open]{border-color:var(--teal-600);box-shadow:0 8px 24px rgba(11,54,48,0.06);}
.post-body .faq summary{cursor:pointer;font-weight:600;font-size:1.02rem;color:var(--ink);padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;list-style:none;user-select:none;transition:color .2s var(--silk);}
.post-body .faq summary::-webkit-details-marker{display:none;}
.post-body .faq summary:hover{color:var(--teal-700);}
.post-body .faq summary .faq-icon{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line-strong);flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--teal-700);font-size:16px;font-weight:400;transition:transform .35s var(--silk),background .25s var(--silk),color .25s var(--silk),border-color .25s var(--silk);}
.post-body .faq details[open] summary .faq-icon{transform:rotate(45deg);background:var(--teal-700);color:#fff;border-color:var(--teal-700);}
.post-body .faq .faq-body{padding:0 22px 20px;color:var(--ink-soft);font-size:0.95rem;line-height:1.7;}
.post-body .faq .faq-body p:last-child{margin-bottom:0;}

/* --- Visual Process Flows & Diagrams --- */
.flow-compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0 34px;}
.flow-col-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:24px;display:flex;flex-direction:column;}
.flow-col-card.manual{border-color:var(--line);background:linear-gradient(180deg,rgba(252,234,230,0.2) 0%,var(--white) 120px);}
.flow-col-card.automated{border-color:var(--teal-500);background:linear-gradient(180deg,rgba(228,243,237,0.4) 0%,var(--white) 120px);box-shadow:0 12px 32px rgba(11,54,48,0.06);}
.flow-col-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line);}
.flow-col-title{font-size:1.05rem;font-weight:600;color:var(--ink);margin:0;}
.flow-col-badge{font-family:var(--font-mono);font-size:0.72rem;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;padding:4px 10px;border-radius:20px;}
.flow-col-badge.manual{background:var(--coral-bg);color:var(--coral);border:1px solid rgba(180,67,47,0.2);}
.flow-col-badge.automated{background:var(--seafoam-100);color:var(--teal-700);border:1px solid var(--teal-500);}

.flow-step-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.flow-step-item{display:flex;align-items:center;gap:12px;background:var(--seafoam-50);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:0.9rem;color:var(--ink);position:relative;}
.flow-step-num{width:22px;height:22px;border-radius:50%;background:var(--line-strong);color:var(--ink);font-family:var(--font-mono);font-size:0.72rem;font-weight:600;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.flow-col-card.automated .flow-step-item{background:var(--white);border-color:var(--seafoam-200);}
.flow-col-card.automated .flow-step-num{background:var(--teal-700);color:#fff;}
.flow-step-arrow{display:flex;justify-content:center;color:var(--ink-faint);padding:2px 0;}
.flow-col-card.automated .flow-step-arrow{color:var(--teal-600);}

.pipeline-stepper{display:flex;flex-wrap:wrap;align-items:center;gap:8px;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:24px 0 28px;}
.pipeline-node{display:flex;align-items:center;gap:10px;padding:8px 14px;background:var(--seafoam-50);border:1px solid var(--line);border-radius:10px;font-size:0.88rem;font-weight:600;color:var(--ink);}
.pipeline-node.active{background:var(--seafoam-100);border-color:var(--teal-500);color:var(--teal-800);}
.pipeline-node .node-idx{width:20px;height:20px;border-radius:50%;background:var(--teal-700);color:#fff;font-family:var(--font-mono);font-size:0.7rem;display:flex;align-items:center;justify-content:center;}
.pipeline-arrow{color:var(--teal-600);display:flex;align-items:center;}

.arch-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:24px;margin:28px 0 34px;box-shadow:0 8px 24px rgba(11,54,48,0.04);}
.arch-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:stretch;}
.arch-box{background:var(--seafoam-50);border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center;}
.arch-box.highlight{border-color:var(--teal-500);background:var(--seafoam-100);}
.arch-box-title{font-size:1rem;font-weight:600;color:var(--ink);margin:0 0 6px;}
.arch-box-sub{font-size:0.82rem;color:var(--ink-soft);margin:0;}
.arch-connector-row{display:flex;align-items:center;justify-content:space-around;padding:12px 0;position:relative;}
.arch-pill{font-family:var(--font-mono);font-size:0.75rem;padding:6px 14px;border-radius:20px;background:var(--white);border:1px solid var(--line-strong);color:var(--teal-700);display:inline-flex;align-items:center;gap:6px;}

.hierarchy-tree{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px 24px;margin:22px 0 28px;font-family:var(--font-mono);font-size:0.86rem;line-height:1.75;color:var(--ink);}
.hierarchy-tree .tree-root{font-weight:600;color:var(--teal-800);display:inline-flex;align-items:center;gap:6px;}
.hierarchy-tree .tree-sub{color:var(--teal-700);font-weight:600;}
.hierarchy-tree .tree-leaf{color:var(--ink-soft);}

.signer-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px;margin:22px 0 28px;}
.signer-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 14px;border-bottom:1px solid var(--line);}
.signer-row:last-child{border-bottom:none;}
.signer-info{display:flex;align-items:center;gap:12px;}
.signer-icon{width:32px;height:32px;border-radius:50%;background:var(--seafoam-100);color:var(--teal-700);display:flex;align-items:center;justify-content:center;font-size:0.82rem;font-weight:600;}
.signer-badge{font-family:var(--font-mono);font-size:0.75rem;padding:4px 10px;border-radius:6px;font-weight:500;}
.signer-badge.done{background:var(--seafoam-100);color:var(--teal-700);border:1px solid var(--teal-500);}
.signer-badge.pending{background:var(--amber-bg);color:var(--amber);border:1px solid rgba(169,106,18,0.25);}

.record-kv-card{background:var(--code-bg);border:1px solid rgba(255,255,255,0.08);border-radius:14px;padding:18px 22px;margin:22px 0 28px;font-family:var(--font-mono);font-size:0.85rem;line-height:1.7;color:var(--code-text);}
.record-kv-card .kv-label{color:var(--code-muted);display:inline-block;min-width:160px;}
.record-kv-card .kv-val{color:#8FD9C4;font-weight:500;}

/* --- Formula & Cost Calculation Cards --- */
.formula-card{background:var(--seafoam-100);border:1px solid var(--teal-500);border-radius:14px;padding:20px 24px;margin:24px 0 28px;box-shadow:0 4px 16px rgba(11,54,48,0.04);}
.formula-title{font-family:var(--font-mono);font-size:0.75rem;letter-spacing:0.08em;text-transform:uppercase;color:var(--teal-700);margin:0 0 8px;font-weight:600;}
.formula-math{font-family:var(--font-display);font-size:1.15rem;font-weight:500;color:var(--ink);margin:0 0 6px;line-height:1.4;}
.formula-sub{font-size:0.86rem;color:var(--ink-soft);margin:0;}

/* --- Cost Breakdown Progress Bars --- */
.cost-breakdown-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:24px 26px;margin:26px 0 32px;display:grid;gap:14px;box-shadow:0 8px 24px rgba(11,54,48,0.04);}
.cost-bar-item{display:grid;gap:6px;}
.cost-bar-label{display:flex;justify-content:space-between;align-items:center;font-size:0.9rem;font-weight:500;color:var(--ink);}
.cost-bar-label span:last-child{font-family:var(--font-mono);font-size:0.82rem;font-weight:600;color:var(--teal-700);}
.cost-bar-track{height:8px;background:var(--seafoam-100);border-radius:100px;overflow:hidden;}
.cost-bar-fill{height:100%;background:linear-gradient(90deg,var(--teal-600),var(--teal-500));border-radius:100px;}

/* --- Audit Checklist Cards --- */
.audit-checklist-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0 32px;}
.audit-checklist-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px;}
.audit-checklist-title{font-size:1rem;font-weight:600;color:var(--ink);margin:0 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px;}
.audit-checklist-items{list-style:none;padding:0;margin:0;display:grid;gap:8px;}
.audit-checklist-items li{display:flex;align-items:flex-start;gap:10px;font-size:0.88rem;color:var(--ink-soft);margin:0;}
.audit-check-box{width:16px;height:16px;border:1.5px solid var(--teal-600);border-radius:4px;display:inline-flex;align-items:center;justify-content:center;color:var(--teal-700);font-size:10px;flex-shrink:0;margin-top:2px;}

/* --- Review Callout Banner --- */
.audit-cta-box{background:linear-gradient(135deg,var(--teal-900) 0%,#0e3e37 100%);border-radius:16px;padding:32px 36px;color:#fff;margin:36px 0;box-shadow:0 24px 50px -15px rgba(11,54,48,0.35);}
.audit-cta-box h3{color:#fff;margin:0 0 12px;font-family:var(--font-display);font-size:1.45rem;font-weight:500;}
.audit-cta-box p{color:var(--code-text);margin:0 0 20px;line-height:1.65;font-size:0.95rem;}
.audit-cta-box .btn{display:inline-flex;}

@media(max-width:768px){
  .flow-compare-grid{grid-template-columns:1fr;}
  .arch-grid{grid-template-columns:1fr;}
  .pipeline-stepper{flex-direction:column;align-items:stretch;}
  .pipeline-arrow{justify-content:center;transform:rotate(90deg);}
}
.related-block{margin-top:64px;}
.related-block h2{font-size:1.4rem;margin:0 0 28px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.related-grid>*{min-width:0;}
.post-card--sm{padding:24px;min-height:280px;}
.post-card h3{overflow-wrap:break-word;}
.post-card--sm .post-excerpt{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden;}
.search-unified{width:260px;}
.blog-result-note{font-family:var(--font-mono);font-size:0.78rem;color:var(--ink-faint);margin:14px 0 0;}

/* --- Unified search dropdown --- */
.search-unified{position:relative;}
.unified-results{position:absolute;top:calc(100% + 8px);left:0;right:auto;width:420px;max-width:90vw;max-height:420px;overflow:auto;background:var(--white);border:1px solid var(--line);border-radius:12px;box-shadow:0 30px 70px -30px rgba(11,54,48,0.35);padding:8px;z-index:60;}
.unified-results .ur-group{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--ink-faint);padding:8px 10px 4px;}
.unified-results a{display:block;padding:8px 10px;border-radius:8px;text-decoration:none;color:var(--ink);}
.unified-results a:hover,.unified-results a.active{background:var(--seafoam-100);}
.unified-results a strong{display:block;font-size:0.88rem;}
.unified-results a span{display:block;font-size:0.78rem;color:var(--ink-soft);}
@media(max-width:1150px){.related-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:640px){.related-grid{grid-template-columns:1fr;}.post-card--sm{min-height:0;}.blog-featured{padding:22px;}.unified-results{width:320px;}}