/* Page-specific styles for To Understand the Future, Understand the Past */

/* ===== HERO THEME ===== */
.article-hero { background: linear-gradient(160deg, #0d1220 0%, #121a35 55%, #0f1428 100%); }
.article-tag-row { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 20px; }
.tag-insights { background: #1a2a5a; }
.tag-career   { background: #2a5a9a; }
.article-hero-sub { color: #8a9acc; }
.article-meta-read { color: #5a6a9a; }
.article-cta { background: linear-gradient(135deg, #0d1220 0%, #121a35 100%); border: 2px solid #2a3a7a; }
.article-cta p { color: #8a9acc; }
.article-cta a.secondary { color: #8a9acc; border: 2px solid #2a3a6a; }

/* ===== H3 OVERRIDE ===== */
.article-body h3 {
  font-size: 19px;
  font-weight: 900;
  color: #0d1220;
  text-transform: none;
  letter-spacing: 0;
  margin: 40px 0 10px;
}
.article-body h3::before {
  content: '';
  display: block;
  width: 24px;
  height: 3px;
  background: #4a6aaa;
  border-radius: 2px;
  margin-bottom: 10px;
}

/* ===== CC COMPOUND ===== */
.cc-compound {
  background: #edf0fa;
  border-left: 4px solid #4a6aaa;
  border-radius: 0 8px 8px 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.cc-compound-label {
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #4a6aaa;
  margin-bottom: 8px;
}
.cc-compound-body {
  font-size: 15px;
  color: #1a2240;
  line-height: 1.7;
}

/* ===== LAYER VISUAL ===== */
.layer-visual {
  margin: 32px 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.layer-visual.is-visible { opacity: 1; transform: none; }

.layer-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  gap: 16px;
  flex-wrap: wrap;
}
.layer-top {
  background: #eaedf7;
  border: 1px solid #c0c8e8;
  border-radius: 8px 8px 0 0;
  border-bottom: none;
}
.layer-mid {
  background: #d8dff2;
  border: 1px solid #a8b4d8;
  border-bottom: none;
}
.layer-bot {
  background: #4a6aaa;
  border: 1px solid #3a5a9a;
  border-radius: 0 0 8px 8px;
}
.layer-label {
  font-size: 14px;
  font-weight: 700;
}
.layer-top .layer-label { color: #2a3a7a; }
.layer-mid .layer-label { color: #1a2a5a; }
.layer-bot .layer-label { color: #fff; }

.layer-note {
  font-size: 12px;
  text-align: right;
}
.layer-top .layer-note { color: #5a6a9a; }
.layer-mid .layer-note { color: #3a4a7a; }
.layer-bot .layer-note { color: #c0cce8; }

/* ===== HISTORY BLOCKS ===== */
.history-block {
  margin: 40px 0;
  border: 1px solid #e0e4f0;
  border-radius: 12px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.history-block.is-visible { opacity: 1; transform: none; }

.history-header {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.history-header-internet { background: #0d1a35; }
.history-header-coding   { background: #1a1208; }
.history-header-ai       { background: #0d1a0d; }

.history-title-group { display: flex; align-items: baseline; gap: 12px; }
.history-label {
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.6;
  color: #fff;
}
.history-title {
  font-size: 20px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.01em;
}
.history-tagline {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  line-height: 1.5;
}

/* ===== TIMELINE ===== */
.timeline {
  padding: 8px 0 4px;
  background: #fff;
}
.tl-item {
  display: flex;
  gap: 0;
  padding: 0;
  position: relative;
}
.tl-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 23px;
  top: 36px;
  bottom: 0;
  width: 2px;
  background: #e8eaf4;
}

.tl-marker {
  width: 48px;
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  padding-top: 20px;
  position: relative;
  z-index: 1;
}
.tl-marker::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid;
  background: #fff;
  display: block;
}
.tl-marker-internet::before { border-color: #4a6aaa; background: #edf0fa; }
.tl-marker-coding::before   { border-color: #c07820; background: #fdf5e8; }
.tl-marker-ai::before       { border-color: #62b517; background: #f0f8e8; }

.tl-body {
  flex: 1;
  padding: 16px 24px 16px 0;
  border-bottom: 1px solid #f0f2f8;
}
.tl-item:last-child .tl-body { border-bottom: none; }

.tl-year {
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.tl-marker-internet ~ .tl-body .tl-year { color: #4a6aaa; }
.tl-marker-coding   ~ .tl-body .tl-year { color: #c07820; }
.tl-marker-ai       ~ .tl-body .tl-year { color: #62b517; }

.tl-event {
  font-size: 15px;
  font-weight: 700;
  color: #1a1a2a;
  margin-bottom: 6px;
  line-height: 1.35;
}
.tl-detail {
  font-size: 14px;
  color: #4a5060;
  line-height: 1.7;
}

/* ===== METHOD STEPS ===== */
.method-steps {
  margin: 28px 0;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.method-steps.is-visible { opacity: 1; transform: none; }

.method-step {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid #eaecf4;
}
.method-step:last-child { border-bottom: none; }

.method-num {
  font-family: monospace;
  font-size: 13px;
  font-weight: 900;
  color: #4a6aaa;
  background: #edf0fa;
  border-radius: 6px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  letter-spacing: 0.02em;
}
.method-title {
  font-size: 15px;
  font-weight: 900;
  color: #1a2240;
  margin-bottom: 6px;
}
.method-detail {
  font-size: 14px;
  color: #404860;
  line-height: 1.7;
}

/* ===== SIMPLE VS COMPLEX ===== */
.simple-vs-complex {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 28px 0;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.simple-vs-complex.is-visible { opacity: 1; transform: none; }

@media (max-width: 640px) { .simple-vs-complex { grid-template-columns: 1fr; } }

.svc-col {
  border-radius: 10px;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.svc-col-complex { background: #fdf2f0; border: 1px solid #f0c8be; }
.svc-col-simple  { background: #f2f8ea; border: 1px solid #c8e298; }

.svc-label {
  font-size: 10px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.svc-col-complex .svc-label { color: #a03020; }
.svc-col-simple  .svc-label { color: #3a7a10; }

.svc-item {
  font-size: 13px;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 6px;
  line-height: 1.45;
}
.svc-item-complex { background: #f5e0da; color: #6a2010; }
.svc-item-simple  { background: #dff0c8; color: #2a5a08; }

.svc-arrow {
  font-size: 11px;
  color: #8a4030;
  padding: 0 10px;
  font-style: italic;
}
.svc-arrow-light { color: #4a7a20; }

.svc-outcome {
  font-size: 12px;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 6px;
  margin-top: 4px;
  line-height: 1.45;
}
.svc-outcome-complex { background: #e8c0b8; color: #6a1a08; }
.svc-outcome-simple  { background: #b8e098; color: #1a5008; }

/* ===== CALLOUT ===== */
.callout-history {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: #edf0fa;
  border: 1px solid #c0c8e8;
  border-radius: 10px;
  padding: 18px 20px;
  margin: 32px 0;
}
.callout-history-icon { flex-shrink: 0; margin-top: 2px; }
.callout-history-body {
  font-size: 15px;
  color: #1a2a5a;
  line-height: 1.7;
  font-style: italic;
}