/* ==========================================================================
   Lzhdeni.com shared article styles
   Loaded after Bootstrap. Provides depth components used across guides:
   breadcrumbs, article meta, callouts, framework diagrams, data tables,
   table of contents, checklists, FAQ, and key-takeaway boxes.
   ========================================================================== */

:root {
  --brand: #0d6efd;
  --brand-dark: #0a58ca;
  --ink: #1f2733;
  --muted: #5b6675;
  --line: rgba(15, 23, 42, .10);
  --soft: #f5f8ff;
}

/* ---------- Breadcrumbs ---------- */
.crumbs {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}
.crumbs .breadcrumb {
  margin: 0;
  padding: .7rem 0;
  font-size: .85rem;
}
.crumbs a {
  color: var(--muted);
  text-decoration: none;
}
.crumbs a:hover { color: var(--brand); text-decoration: underline; }
.crumbs .breadcrumb-item.active { color: var(--ink); font-weight: 600; }

/* ---------- Article meta (byline row) ---------- */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem 1rem;
  font-size: .88rem;
  color: var(--muted);
  margin-top: 1rem;
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: .4rem; }
.article-meta .author {
  font-weight: 600;
  color: var(--ink);
}
.article-meta .avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), #6ea8fe);
  color: #fff; font-weight: 700; font-size: .85rem;
  display: inline-flex; align-items: center; justify-content: center;
}
.article-meta .dot { color: var(--line); }

/* ---------- Article body typography ---------- */
.article-body { max-width: 46rem; }
.article-body h2 {
  font-weight: 700;
  margin-top: 2.6rem;
  margin-bottom: 1rem;
  scroll-margin-top: 90px;
}
.article-body h3 {
  font-weight: 700;
  font-size: 1.2rem;
  margin-top: 1.8rem;
  margin-bottom: .75rem;
}
.article-body p { color: #333b47; }
.article-body ul li, .article-body ol li { margin-bottom: .45rem; }
.article-body figure { margin: 1.8rem 0; }
.article-body figcaption {
  font-size: .82rem; color: var(--muted); text-align: center; margin-top: .5rem;
}

/* ---------- Lead / summary box ("What you'll learn") ---------- */
.summary-box {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.3rem 1.5rem;
  margin: 1.75rem 0 2rem;
}
.summary-box .summary-title {
  font-weight: 700;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--brand-dark);
  margin-bottom: .6rem;
}
.summary-box ul { margin: 0; padding-left: 1.1rem; }
.summary-box li { margin-bottom: .35rem; }

/* ---------- Callouts ---------- */
.callout {
  border-radius: 14px;
  padding: 1.1rem 1.25rem;
  margin: 1.6rem 0;
  border: 1px solid var(--line);
  border-left-width: 4px;
  background: #fff;
}
.callout .callout-label {
  font-weight: 700;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .35rem;
  display: block;
}
.callout p:last-child { margin-bottom: 0; }
.callout-tip { border-left-color: #198754; }
.callout-tip .callout-label { color: #198754; }
.callout-note { border-left-color: var(--brand); }
.callout-note .callout-label { color: var(--brand-dark); }
.callout-warn { border-left-color: #fd7e14; background: #fffaf4; }
.callout-warn .callout-label { color: #c05600; }

/* ---------- Framework / model diagram ---------- */
.framework {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcff 100%);
  padding: 1.5rem;
  margin: 1.8rem 0;
  box-shadow: 0 6px 20px rgba(15, 23, 42, .04);
}
.framework .framework-title {
  font-weight: 700;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 1rem;
}
.framework .layer {
  display: flex;
  gap: .9rem;
  align-items: flex-start;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  margin-bottom: .7rem;
}
.framework .layer:last-child { margin-bottom: 0; }
.framework .layer .step {
  flex: 0 0 auto;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--brand); color: #fff;
  font-weight: 700; font-size: .9rem;
  display: inline-flex; align-items: center; justify-content: center;
}
.framework .layer .layer-body { flex: 1 1 auto; }
.framework .layer .layer-body strong { display: block; }
.framework .layer .layer-body span { font-size: .9rem; color: var(--muted); }
.framework .arrow { text-align: center; color: var(--line); font-size: 1.1rem; line-height: 1; margin: -.2rem 0 .5rem; }

/* ---------- Data tables ---------- */
.table-wrap { overflow-x: auto; margin: 1.6rem 0; border-radius: 14px; border: 1px solid var(--line); }
table.data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: .95rem;
  background: #fff;
}
table.data-table th, table.data-table td {
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
table.data-table thead th {
  background: #f3f6fb;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 2px solid var(--line);
}
table.data-table tbody tr:last-child td { border-bottom: none; }
table.data-table tbody tr:nth-child(even) td { background: #fbfcfe; }

/* ---------- Checklist ---------- */
.checklist { list-style: none; padding-left: 0; margin: 1.4rem 0; }
.checklist li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: .7rem;
}
.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  width: 1.4rem; height: 1.4rem;
  background: #e7f6ee; color: #198754;
  border-radius: 6px;
  font-size: .85rem; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
}

/* ---------- Table of contents ---------- */
.toc {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  padding: 1.25rem 1.4rem;
}
.toc .toc-title {
  font-weight: 700; font-size: .8rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--muted); margin-bottom: .7rem;
}
.toc ol { margin: 0; padding-left: 1.1rem; }
.toc li { margin-bottom: .45rem; font-size: .92rem; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--brand); text-decoration: underline; }

/* ---------- Key takeaways ---------- */
.takeaways {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #0f172a;
  color: #e6ebf5;
  padding: 1.5rem 1.6rem;
  margin: 2.2rem 0 1rem;
}
.takeaways .takeaways-title {
  font-weight: 700; font-size: .82rem; text-transform: uppercase;
  letter-spacing: .07em; color: #7fb0ff; margin-bottom: .8rem;
}
.takeaways ul { margin: 0; padding-left: 1.1rem; }
.takeaways li { margin-bottom: .5rem; }
.takeaways li::marker { color: #7fb0ff; }

/* ---------- FAQ ---------- */
.faq { margin: 1.4rem 0; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 1.1rem;
  margin-bottom: .75rem;
  background: #fff;
}
.faq details[open] { box-shadow: 0 6px 18px rgba(15, 23, 42, .05); }
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 1rem 0;
  list-style: none;
  position: relative;
  padding-right: 1.8rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  font-size: 1.3rem; color: var(--muted); line-height: 1;
}
.faq details[open] summary::after { content: "\2212"; }
.faq .faq-answer { padding: 0 0 1rem; color: #333b47; }
.faq .faq-answer p:last-child { margin-bottom: 0; }

/* ---------- Author box ---------- */
.author-box {
  display: flex; gap: 1rem; align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  padding: 1.3rem 1.4rem;
  margin-top: 2.4rem;
}
.author-box .avatar-lg {
  flex: 0 0 auto;
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), #6ea8fe);
  color: #fff; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
}
.author-box .author-name { font-weight: 700; }
.author-box .author-bio { font-size: .9rem; color: var(--muted); margin: .2rem 0 0; }

/* ---------- Related / next steps ---------- */
.next-steps a { text-decoration: none; }
.next-steps .card { transition: box-shadow .15s ease; }
.next-steps .card:hover { box-shadow: 0 10px 26px rgba(15, 23, 42, .08); }

@media (max-width: 991px) {
  .article-body h2 { margin-top: 2rem; }
  .toc { margin-bottom: 1.5rem; }
}

/* ==========================================================================
   Interactive toolkit styles
   ========================================================================== */
.tool-panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 28px rgba(15, 23, 42, .06);
  padding: 1.6rem;
}
.tool-panel + .tool-panel { margin-top: 1.4rem; }

/* Timer display */
.timer-display {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: clamp(3rem, 12vw, 5.5rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  text-align: center;
}
.timer-mode {
  text-align: center;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .82rem;
  color: var(--brand-dark);
  margin-bottom: .5rem;
}
.timer-mode.is-break { color: #198754; }
.timer-ring {
  width: 240px; height: 240px; max-width: 70vw; max-height: 70vw;
  margin: 0 auto;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.timer-ring svg { position: absolute; inset: 0; transform: rotate(-90deg); width: 100%; height: 100%; }
.timer-ring .track { fill: none; stroke: #eef1f6; stroke-width: 10; }
.timer-ring .progress { fill: none; stroke: var(--brand); stroke-width: 10; stroke-linecap: round; transition: stroke-dashoffset .4s linear; }
.timer-ring.is-break .progress { stroke: #198754; }

/* Generic tool buttons row */
.tool-btns { display: flex; flex-wrap: wrap; gap: .6rem; justify-content: center; }

/* Result / output box */
.tool-result {
  border: 1px dashed var(--line);
  border-radius: 14px;
  background: var(--soft);
  padding: 1.2rem 1.35rem;
}
.tool-result.is-empty { color: var(--muted); font-style: italic; }
.tool-stat {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 2rem;
  color: var(--brand-dark);
  line-height: 1.1;
}
.tool-stat-label { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; }

/* Priority matrix */
.matrix-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.matrix-cell {
  border: 1px solid var(--line);
  border-radius: 14px;
  min-height: 150px;
  padding: .9rem;
  background: #fff;
}
.matrix-cell h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; font-weight: 700; margin-bottom: .5rem; }
.matrix-cell.q1 { background: #eef6ff; border-color: #cfe4ff; }
.matrix-cell.q2 { background: #eafaf1; border-color: #cdeeda; }
.matrix-cell.q3 { background: #fff6ec; border-color: #ffe3c2; }
.matrix-cell.q4 { background: #f4f5f7; }
.matrix-item {
  background: #fff; border: 1px solid var(--line); border-radius: 9px;
  padding: .45rem .6rem; margin-bottom: .45rem; font-size: .9rem;
  display: flex; justify-content: space-between; align-items: center; gap: .5rem;
}
.matrix-item button { border: none; background: transparent; color: #c0341d; cursor: pointer; font-weight: 700; line-height: 1; }

/* Chips / removable list items */
.chip-list { display: flex; flex-direction: column; gap: .5rem; }
.chip-row {
  display: flex; align-items: center; gap: .5rem;
  border: 1px solid var(--line); border-radius: 10px; padding: .5rem .7rem; background: #fff;
}
.chip-row .grow { flex: 1 1 auto; }
.chip-row button.rm { border: none; background: #fbe9e6; color: #c0341d; border-radius: 6px; width: 26px; height: 26px; cursor: pointer; font-weight: 700; }

/* Decision helper */
.decision-result { border-radius: 14px; padding: 1.3rem 1.4rem; font-weight: 600; }
.decision-result.async { background: #eafaf1; border: 1px solid #cdeeda; color: #12633b; }
.decision-result.sync { background: #eef6ff; border: 1px solid #cfe4ff; color: #0a4a9c; }

/* Toolkit hub cards */
.tool-hub-card {
  height: 100%; border: 1px solid var(--line); border-radius: 16px; background: #fff;
  padding: 1.3rem; transition: box-shadow .15s ease, transform .15s ease; text-decoration: none; display: block;
}
.tool-hub-card:hover { box-shadow: 0 12px 28px rgba(15,23,42,.10); transform: translateY(-2px); }
.tool-hub-card .tool-emoji { font-size: 1.7rem; }
.tool-hub-card h3 { font-size: 1.05rem; font-weight: 700; margin: .5rem 0 .3rem; color: var(--ink); }
.tool-hub-card p { font-size: .9rem; color: var(--muted); margin: 0; }

/* Print helpers for planner */
@media print {
  nav.navbar, .crumbs, footer, .no-print, .tool-btns { display: none !important; }
  body { background: #fff; }
  .tool-panel { box-shadow: none; border: 1px solid #ccc; }
}