/* Shared components for design-decision storytelling.
   Linked from index.html, case-amazon.html, case-tibco.html, portfolio_case_studies.html. */

:root {
  --dd-blue: #1E40AF; --dd-blue-bg: #EFF6FF; --dd-blue-text: #1E3A8A;
  --dd-green: #14532D; --dd-green-bg: #F0FDF4; --dd-green-text: #14532D;
  --dd-red: #991B1B; --dd-red-bg: #FEF2F2; --dd-red-text: #7F1D1D;
  --dd-teal: #0D9488; --dd-teal-bg: #F0FDFA; --dd-teal-text: #134E4A;
}

/* Section headline that states the decision, not the topic */
.dd-section { margin: 56px 0 0; scroll-margin-top: 72px; }
.dd-eyebrow { font-size: 12px; font-weight: 500; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 8px; }
.dd-h2 { font-size: 21px; font-weight: 500; line-height: 1.3; letter-spacing: -0.02em; margin-bottom: 14px; }
.dd-lede { font-size: 15px; line-height: 1.75; color: var(--text-primary); max-width: 580px; margin-bottom: 20px; }

/* Problem / Evidence / Decision / Why / Result */
.dd-block { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 24px; }
.dd-row { display: grid; grid-template-columns: 104px 1fr; gap: 14px; padding: 12px 16px; border-top: 1px solid var(--border-light); }
.dd-row:first-child { border-top: none; }
.dd-key { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); padding-top: 2px; }
.dd-val { font-size: 14px; line-height: 1.6; color: var(--text-primary); }
.dd-row.decision { background: var(--dd-blue-bg); }
.dd-row.decision .dd-key { color: var(--dd-blue-text); }
.dd-row.result { background: var(--dd-green-bg); }
.dd-row.result .dd-key { color: var(--dd-green-text); }

/* Step flow: A -> B -> C */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 6px; margin: 4px 0 24px; }
.flow-step { flex: 1 1 0; min-width: 110px; background: var(--bg-secondary); border-radius: 8px; padding: 10px 12px; font-size: 14px; line-height: 1.4; font-weight: 500; }
.flow-step small { display: block; font-weight: 400; color: var(--text-secondary); font-size: 13px; margin-top: 3px; }
.flow-arrow { display: flex; align-items: center; color: var(--text-secondary); font-size: 14px; }
.flow.vertical { flex-direction: column; }
.flow.vertical .flow-arrow { justify-content: center; }

/* Before / after, rejected / shipped */
.ba { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 24px; }
.ba-col { border-radius: 10px; padding: 14px 16px; border: 1px solid var(--border); }
.ba-tag { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.ba-title { font-size: 15px; font-weight: 500; margin-bottom: 4px; line-height: 1.35; }
.ba-body { font-size: 14px; color: var(--text-secondary); line-height: 1.55; }
.ba-col.before, .ba-col.rejected { background: #FAFAFA; }
.ba-col.before .ba-tag { color: var(--text-secondary); }
.ba-col.rejected .ba-tag { color: var(--dd-red); }
.ba-col.after, .ba-col.shipped { background: var(--dd-green-bg); border-color: #BBF7D0; }
.ba-col.after .ba-tag, .ba-col.shipped .ba-tag { color: var(--dd-green); }
.ba.three { grid-template-columns: 1fr 1fr 1fr; }

/* Annotated screenshot */
.annot { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 24px; }
.annot-figure { position: relative; background: #fff; }
.annot-figure img { width: 100%; display: block; }
.annot-pin { position: absolute; transform: translate(-50%, -50%); width: 22px; height: 22px; border-radius: 50%; background: var(--dd-blue); color: #fff; font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 3px rgba(255,255,255,0.95), 0 2px 6px rgba(0,0,0,0.25); }
.annot-list { list-style: none; border-top: 1px solid var(--border-light); }
.annot-list li { display: grid; grid-template-columns: 22px 1fr; gap: 12px; padding: 11px 16px; border-top: 1px solid var(--border-light); font-size: 14px; line-height: 1.55; }
.annot-list li:first-child { border-top: none; }
.annot-list .n { width: 22px; height: 22px; border-radius: 50%; background: var(--dd-blue); color: #fff; font-size: 12px; font-weight: 600; display: flex; align-items: center; justify-content: center; margin-top: 1px; }
.annot-list .n.grey { background: #525252; }
.annot-list b { font-weight: 600; }
.annot-list span { color: var(--text-secondary); }
.annot-caption { font-size: 13px; color: var(--text-secondary); padding: 10px 16px; border-top: 1px solid var(--border-light); background: var(--bg-secondary); }

/* Two-column role / need comparison */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 24px; }
.compare-col { border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.compare-col h3 { font-size: 14px; font-weight: 500; margin-bottom: 2px; }
.compare-col .sub { font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; }
.compare-col ul { list-style: none; }
.compare-col li { font-size: 14px; line-height: 1.5; padding: 4px 0 4px 18px; position: relative; color: var(--text-primary); }
.compare-col li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--text-tertiary); }
.compare-col.a li::before { background: var(--dd-teal); }
.compare-col.b li::before { background: var(--dd-blue); }

/* Headline story (signature) */
.signature { border-radius: 12px; padding: 20px 20px 6px; margin-bottom: 24px; background: linear-gradient(135deg, #EFF6FF 0%, #F5F3FF 100%); border: 1px solid #DBEAFE; }
.signature-q { font-size: 19px; font-weight: 500; line-height: 1.35; letter-spacing: -0.015em; margin-bottom: 16px; }
.signature .dd-block { background: rgba(255,255,255,0.75); }

/* Engineering partnership note */
.eng-note { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; line-height: 1.6; color: var(--text-secondary); background: var(--bg-secondary); border-radius: 8px; padding: 12px 14px; margin-bottom: 24px; }
.eng-note i { color: var(--text-primary); font-size: 16px; margin-top: 1px; }
.eng-note b { color: var(--text-primary); font-weight: 600; }

/* What I'd do differently — prominent */
.differently { border: 1px solid var(--amber-border, #FDE68A); background: var(--amber-bg, #FFFBEB); border-radius: 12px; padding: 18px 20px; margin: 40px 0 48px; }
.differently-title { font-size: 13px; font-weight: 600; color: var(--amber-text, #78350F); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; display: flex; gap: 6px; align-items: center; }
.differently p { font-size: 15px; line-height: 1.7; color: var(--text-primary); margin-bottom: 10px; }
.differently p:last-child { margin-bottom: 0; }

/* Homepage capability cards and approach steps */
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 52px; }
.cap { border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.cap i { font-size: 18px; color: var(--dd-blue); display: block; margin-bottom: 10px; }
.cap h3 { font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.cap p { font-size: 14px; line-height: 1.55; color: var(--text-secondary); }
.approach { list-style: none; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; margin-bottom: 52px; }
.approach li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 14px 18px; border-top: 1px solid var(--border-light); }
.approach li:first-child { border-top: none; }
.approach .num { font-size: 13px; font-weight: 600; color: var(--text-secondary); padding-top: 2px; letter-spacing: 0.04em; }
.approach h3 { font-size: 14px; font-weight: 500; margin-bottom: 2px; }
.approach p { font-size: 14px; line-height: 1.55; color: var(--text-secondary); }

/* Small grid for demoted explorations */
.mini-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 24px; }
.mini { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.mini img { width: 100%; display: block; aspect-ratio: 4/3; object-fit: cover; object-position: top; border-bottom: 1px solid var(--border-light); background: #fff; }
.mini div { padding: 10px 12px; }
.mini h3 { font-size: 14px; font-weight: 500; margin-bottom: 3px; }
.mini p { font-size: 13px; line-height: 1.5; color: var(--text-secondary); }
.status-pill { display: inline-block; font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); background: var(--bg-secondary); border: 1px solid var(--border-light); border-radius: 100px; padding: 0 7px; margin-left: 4px; vertical-align: 1px; }

/* Theme list (error prevention, progressive disclosure) */
.theme-list { list-style: none; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; margin-bottom: 24px; }
.theme-list li { display: grid; grid-template-columns: 150px 1fr; gap: 14px; padding: 12px 16px; border-top: 1px solid var(--border-light); font-size: 14px; line-height: 1.55; }
.theme-list li:first-child { border-top: none; }
.theme-list b { font-weight: 600; }
.theme-list span { color: var(--text-secondary); }

@media (max-width: 600px) {
  .dd-row { grid-template-columns: 1fr; gap: 2px; }
  .ba, .ba.three, .compare, .cap-grid, .mini-grid { grid-template-columns: 1fr; }
  .flow { flex-direction: column; }
  .flow-arrow { justify-content: center; transform: rotate(90deg); }
  .theme-list li { grid-template-columns: 1fr; gap: 2px; }
  .dd-h2 { font-size: 19px; }
  .signature-q { font-size: 17px; }
  .annot-pin { width: 20px; height: 20px; font-size: 12px; }
}

/* Accessibility helpers */
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.dd-textlink { font-size: 14px; color: #1E40AF; text-decoration: none; display: inline-flex; align-items: center; gap: 5px; }
.dd-textlink span { text-decoration: underline; text-underline-offset: 3px; }
.dd-textlink:hover span { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid #1E40AF; outline-offset: 2px; border-radius: 3px; }

/* ── Two-speed reading: summary up top, reasoning on demand ── */
.tldr { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 20px; }
.tldr-row { display: grid; grid-template-columns: 104px 1fr; gap: 14px; padding: 12px 16px; border-top: 1px solid var(--border-light); font-size: 14.5px; line-height: 1.6; }
.tldr-row:first-child { border-top: none; }
.tldr-key { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); padding-top: 3px; }
.tldr-row.result { background: var(--dd-green-bg); }
.tldr-row.result .tldr-key { color: var(--dd-green-text); }
.tldr-tools { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin: 0 0 8px; font-size: 13px; color: var(--text-secondary); }
.expand-all { font: inherit; font-size: 13px; font-weight: 500; color: var(--dd-blue); background: none; border: 1px solid var(--border); border-radius: 100px; padding: 5px 12px; cursor: pointer; }
.expand-all:hover { background: var(--dd-blue-bg); border-color: #BFDBFE; }
.dd-takeaway { font-size: 15px; line-height: 1.65; color: var(--text-primary); max-width: 580px; margin-bottom: 18px; }
.dd-takeaway strong { font-weight: 600; }
.reasoning { border: 1px solid var(--border); border-radius: 10px; margin: 4px 0 8px; background: #FCFCFC; }
.reasoning > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 8px; padding: 11px 14px; font-size: 14px; font-weight: 500; color: var(--dd-blue); border-radius: 10px; }
.reasoning > summary::-webkit-details-marker { display: none; }
.reasoning > summary::before { content: "+"; display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; border-radius: 50%; background: var(--dd-blue-bg); font-size: 14px; line-height: 1; transition: transform 0.15s; }
.reasoning[open] > summary::before { content: "\2212"; }
.reasoning > summary:hover { background: var(--dd-blue-bg); }
.reasoning > summary small { font-weight: 400; color: var(--text-secondary); font-size: 13px; }
.reasoning-body { padding: 6px 16px 4px; border-top: 1px solid var(--border-light); }
.reasoning-body > *:first-child { margin-top: 12px; }
.reasoning-body .dd-lede, .reasoning-body .body-text { font-size: 14.5px; }
.reasoning-body h4 { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); margin: 18px 0 10px; }
.steps { list-style: none; margin-bottom: 20px; }
.steps li { position: relative; padding: 0 0 14px 30px; font-size: 14px; line-height: 1.6; color: var(--text-secondary); }
.steps li b { display: block; color: var(--text-primary); font-weight: 600; margin-bottom: 2px; }
.steps li::before { content: attr(data-n); position: absolute; left: 0; top: 1px; width: 20px; height: 20px; border-radius: 50%; background: var(--bg-secondary); border: 1px solid var(--border); font-size: 11px; font-weight: 600; color: var(--text-primary); display: flex; align-items: center; justify-content: center; }
.steps li.x::before { background: var(--dd-red-bg); color: var(--dd-red); border-color: #FECACA; }
.steps li.ok::before { background: var(--dd-green-bg); color: var(--dd-green); border-color: #BBF7D0; }
.tradeoff { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-bottom: 20px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.tradeoff th, .tradeoff td { text-align: left; padding: 9px 12px; border-top: 1px solid var(--border-light); vertical-align: top; line-height: 1.45; }
.tradeoff thead th { background: var(--bg-secondary); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); border-top: none; }
.tradeoff td.win { color: var(--dd-green); font-weight: 500; }
.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.gallery figure { margin: 0; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: #fff; }
.gallery img { width: 100%; display: block; }
.gallery figcaption { font-size: 13px; line-height: 1.5; color: var(--text-secondary); padding: 9px 12px; border-top: 1px solid var(--border-light); }
.fig-solo { margin: 0 0 18px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #fff; }
.fig-solo img { width: 100%; display: block; }
.fig-solo figcaption { font-size: 13px; line-height: 1.5; color: var(--text-secondary); padding: 10px 14px; border-top: 1px solid var(--border-light); }
@media (max-width: 600px) {
  .tldr-row { grid-template-columns: 1fr; gap: 2px; }
  .gallery { grid-template-columns: 1fr; }
  .tradeoff { font-size: 12.5px; }
  .tradeoff th, .tradeoff td { padding: 8px; }
}
@media print { .reasoning-body { display: block !important; } }
.theme-list b a { color: var(--dd-blue); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.theme-list b a:hover { text-decoration-thickness: 2px; }

/* On-this-page map */
.toc { border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px 6px; margin: 8px 0 8px; background: var(--bg-primary); }
.toc-title { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-secondary); margin-bottom: 10px; }
.toc-group { font-size: 11.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-tertiary); margin: 10px 0 2px; }
.toc ol { list-style: none; margin: 0 0 6px; }
.toc li { border-top: 1px solid var(--border-light); }
.toc li:first-child { border-top: none; }
.toc a { display: grid; grid-template-columns: 26px 1fr auto; gap: 10px; align-items: baseline; padding: 8px 0; text-decoration: none; color: inherit; }
.toc a:hover .toc-name { color: var(--dd-blue); text-decoration: underline; text-underline-offset: 3px; }
.toc-n { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.toc-name { font-size: 14px; font-weight: 500; }
.toc-name small { display: block; font-size: 13px; font-weight: 400; color: var(--text-secondary); margin-top: 1px; line-height: 1.45; }
.toc a i { font-size: 13px; color: var(--text-tertiary); }
.proj-index li { grid-template-columns: 176px 1fr; column-gap: 20px; }
.proj-index a { white-space: nowrap; font-weight: 400; color: var(--dd-blue); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.proj-index a:hover { text-decoration-thickness: 2px; }
@media (max-width: 600px) { .proj-index li { grid-template-columns: 1fr; } .proj-index a { white-space: normal; } }
/* On-this-page header band, matching table headers */
.toc { padding: 0 0 6px; overflow: hidden; }
.toc-title { background: var(--bg-secondary); padding: 11px 18px; margin: 0 0 4px; border-bottom: 1px solid var(--border-light); }
.toc ol, .toc-group { margin-left: 18px; margin-right: 18px; }