/*
 * Author: Yogabrata Mukhopadhyay
 * Organization: ManjuLab
 * Copyright (c) 2026 ManjuLab. All rights reserved.
 */
.workbook-body {
  margin: 0;
}

.workbook-top {
  display: flex;
  gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 90%, black);
}
.workbook-top a {
  color: var(--focus);
  text-decoration: none;
  font-size: 0.9rem;
}
.workbook-top a:hover { text-decoration: underline; }

.workbook {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.workbook-hero {
  margin-bottom: 2.5rem;
  max-width: 40rem;
}
.workbook-kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0 0 0.5rem;
}
.workbook-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.workbook-lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.process {
  margin-bottom: 3rem;
}
.process h2,
.case h2,
.adaptation h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.process-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
  counter-reset: none;
}
.process-rail li {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 85%, transparent);
  padding: 0.85rem;
  display: grid;
  gap: 0.35rem;
  align-content: start;
}
.process-rail strong { font-size: 0.95rem; }
.process-rail p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.4;
}
.step-num {
  display: inline-grid;
  place-items: center;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.8rem;
  font-weight: 700;
}
.workbook-note {
  margin: 1rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 46rem;
}
.workbook-note code {
  background: #0c1512;
  padding: 0.05rem 0.3rem;
}

.case {
  margin: 0 0 3.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.case-head {
  max-width: 40rem;
  margin-bottom: 1.5rem;
}
.case-brand {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  color: var(--focus);
  letter-spacing: 0.04em;
}
.case-head p { color: var(--muted); line-height: 1.5; }

.asset {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: center;
  margin-bottom: 2rem;
}
.asset-flip {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
}
.asset-flip .asset-frame { order: 2; }
.asset-flip .asset-copy { order: 1; }

.asset-tiktok {
  grid-template-columns: minmax(140px, 280px) minmax(0, 1fr);
}

.asset-frame {
  border: 1px solid var(--border);
  background: #0a100e;
  overflow: hidden;
}
.asset-frame img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}
.ratio-16x9 { aspect-ratio: 16 / 9; }
.ratio-1x1 { aspect-ratio: 1 / 1; max-width: 420px; }
.ratio-9x16 {
  aspect-ratio: 9 / 16;
  max-width: 280px;
}
.ratio-16x9 img,
.ratio-1x1 img,
.ratio-9x16 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-pill {
  display: inline-block;
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.asset-copy h3,
.asset-compact h3,
.compare-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}
.why {
  margin: 0 0 0.75rem;
  line-height: 1.5;
}
.asset-copy ul {
  margin: 0 0 0.75rem;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.92rem;
}
.asset-copy li { margin-bottom: 0.35rem; }
.reach-map {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}
.reach-map code {
  background: #0c1512;
  padding: 0.05rem 0.3rem;
}

.asset-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.asset-compact {
  border: 1px solid var(--border);
  padding: 0.75rem;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}
.asset-compact p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}

.compare-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}
.compare-card {
  border: 1px solid var(--border);
  padding: 0.65rem;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}
.compare-card p {
  margin: 0.35rem 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.4;
}

.adaptation table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.adaptation th,
.adaptation td {
  text-align: left;
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.adaptation th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.workbook-foot {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
}
.workbook-foot a { color: var(--focus); }

@media (max-width: 900px) {
  .process-rail {
    grid-template-columns: 1fr;
  }
  .asset,
  .asset-flip,
  .asset-tiktok {
    grid-template-columns: 1fr;
  }
  .asset-flip .asset-frame,
  .asset-flip .asset-copy { order: unset; }
  .asset-pair,
  .compare-row {
    grid-template-columns: 1fr;
  }
  .ratio-1x1,
  .ratio-9x16 { max-width: 100%; }
}