/* Lesson 01 deck — academic style
 * EB Garamond (italic serif) headings, restrained single-accent palette,
 * clean white/cream backgrounds, subtle entrance animations.
 */

/* === ENTRANCE ANIMATIONS === */
@keyframes fadeUpIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.slide.is-active .card,
.slide.is-active .agenda-row,
.slide.is-active .ladder-step,
.slide.is-active .takeaway,
.slide.is-active .hero-note,
.slide.is-active .prompt-box,
.slide.is-active .compare-table,
.slide.is-active .glossary .card {
  animation: fadeUpIn 0.45s var(--ease) both;
}

.slide.is-active .card:nth-child(2),
.slide.is-active .agenda-row:nth-child(2),
.slide.is-active .ladder-step:nth-child(2),
.slide.is-active .takeaway:nth-child(2) { animation-delay: 0.08s; }

.slide.is-active .card:nth-child(3),
.slide.is-active .agenda-row:nth-child(3),
.slide.is-active .ladder-step:nth-child(3),
.slide.is-active .takeaway:nth-child(3) { animation-delay: 0.16s; }

.slide.is-active .card:nth-child(4),
.slide.is-active .agenda-row:nth-child(4),
.slide.is-active .ladder-step:nth-child(4),
.slide.is-active .takeaway:nth-child(4) { animation-delay: 0.24s; }

.slide.is-active .card:nth-child(5),
.slide.is-active .agenda-row:nth-child(5),
.slide.is-active .ladder-step:nth-child(5),
.slide.is-active .takeaway:nth-child(5) { animation-delay: 0.32s; }

.slide.is-active .card:nth-child(6),
.slide.is-active .agenda-row:nth-child(6),
.slide.is-active .ladder-step:nth-child(6) { animation-delay: 0.40s; }

.slide.is-active .diagram-shell {
  animation: fadeIn 0.5s var(--ease) 0.06s both;
}

@media (prefers-reduced-motion: reduce) {
  .slide.is-active .card,
  .slide.is-active .agenda-row,
  .slide.is-active .ladder-step,
  .slide.is-active .takeaway,
  .slide.is-active .hero-note,
  .slide.is-active .prompt-box,
  .slide.is-active .compare-table,
  .slide.is-active .diagram-shell,
  .slide.is-active .glossary .card { animation: none; }
}

/* === SLIDE BASE === */
.tpl-lesson-01 .slide {
  padding: clamp(44px, 5.5vh, 72px) clamp(52px, 6.5vw, 92px) clamp(44px, 5.5vh, 74px);
  background: var(--bg);
  font-size: clamp(15px, 1.2vw, 18px);
  font-family: var(--font-sans);
}

/* === TYPOGRAPHY === */
.tpl-lesson-01 .kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.85vw, 13px);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.tpl-lesson-01 .h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(52px, 6.5vw, 88px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
  font-style: italic;
  max-width: 16ch;
  color: var(--text-1);
}

.tpl-lesson-01 .h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  font-weight: 700;
  font-style: italic;
  max-width: 22ch;
  color: var(--text-1);
}

.tpl-lesson-01 .lede {
  max-width: 58rem;
  margin: 0;
  font-size: clamp(18px, 1.5vw, 24px);
  line-height: 1.6;
  color: var(--text-2);
  font-family: var(--font-serif);
}

.tpl-lesson-01 .accent {
  color: var(--accent);
  font-weight: 700;
}

.tpl-lesson-01 .mono {
  font-family: var(--font-mono);
}

/* === PILLS === */
.tpl-lesson-01 .pill-row,
.tpl-lesson-01 .chip-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.tpl-lesson-01 .pill,
.tpl-lesson-01 .chip {
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 6px 14px;
  background: transparent;
  color: var(--accent);
  font-size: clamp(12px, 0.9vw, 14px);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

/* === HERO NOTE === */
.tpl-lesson-01 .hero-note {
  margin-top: clamp(18px, 2vh, 30px);
  max-width: 58rem;
  padding: clamp(12px, 1.3vh, 18px) 20px;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  color: var(--text-2);
  line-height: 1.65;
  font-size: clamp(16px, 1.4vw, 21px);
  font-family: var(--font-serif);
}

/* === SPEAKER === */
.tpl-lesson-01 .speaker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
}

.tpl-lesson-01 .speaker .av {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent);
}

.tpl-lesson-01 .speaker b { display: block; font-size: 16px; }
.tpl-lesson-01 .speaker span { color: var(--text-3); font-size: 13px; }

/* === GRIDS & CARDS === */
.tpl-lesson-01 .grid { display: grid; gap: 16px; }
.tpl-lesson-01 .g2 { grid-template-columns: 1fr 1fr; }
.tpl-lesson-01 .g3 { grid-template-columns: repeat(3, 1fr); }

.tpl-lesson-01 .card {
  padding: clamp(14px, 1.5vh, 22px) clamp(16px, 1.6vw, 22px);
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tpl-lesson-01 .card h3,
.tpl-lesson-01 .card h4 {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.4vw, 21px);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  color: var(--text-1);
}

.tpl-lesson-01 .card p,
.tpl-lesson-01 .card li {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(14px, 1.1vw, 17px);
  line-height: 1.6;
  font-family: var(--font-serif);
}

.tpl-lesson-01 .card ul {
  margin: 10px 0 0 18px;
  padding: 0;
}

/* === AGENDA === */
.tpl-lesson-01 .agenda {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.tpl-lesson-01 .agenda-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: clamp(10px, 1.1vh, 15px) 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tpl-lesson-01 .agenda-row .num,
.tpl-lesson-01 .ladder-step .num,
.tpl-lesson-01 .compare-table .tag {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
}

.tpl-lesson-01 .agenda-row .t {
  font-size: clamp(16px, 1.3vw, 20px);
  color: var(--text-1);
  font-family: var(--font-serif);
}

.tpl-lesson-01 .agenda-row .d {
  color: var(--text-3);
  font-size: clamp(12px, 0.9vw, 14px);
  font-family: var(--font-mono);
}

/* === LADDER / STAIRCASE === */
.tpl-lesson-01 .ladder {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.tpl-lesson-01 .ladder-step {
  display: grid;
  grid-template-columns: 50px 1.1fr 1.7fr;
  gap: 16px;
  align-items: start;
  padding: clamp(10px, 1.1vh, 15px) 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tpl-lesson-01 .ladder-step strong {
  display: block;
  font-size: clamp(16px, 1.3vw, 20px);
  font-family: var(--font-display);
  font-style: italic;
  color: var(--text-1);
}

.tpl-lesson-01 .ladder-step p {
  margin: 3px 0 0;
  font-size: clamp(13px, 1vw, 16px);
  line-height: 1.55;
  color: var(--text-2);
  font-family: var(--font-serif);
}

/* === COMPARE TABLE === */
.tpl-lesson-01 .split-note {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  align-items: start;
  margin-top: 22px;
}

.tpl-lesson-01 .compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.tpl-lesson-01 .compare-table th,
.tpl-lesson-01 .compare-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  font-family: var(--font-serif);
}

.tpl-lesson-01 .compare-table th {
  color: var(--text-1);
  background: var(--bg-soft);
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(15px, 1.2vw, 18px);
}

.tpl-lesson-01 .compare-table td {
  color: var(--text-2);
  font-size: clamp(14px, 1.1vw, 16px);
  line-height: 1.55;
}

.tpl-lesson-01 .compare-table tr:last-child td { border-bottom: none; }

/* === DIAGRAM SHELL === */
.tpl-lesson-01 .diagram-shell {
  margin-top: clamp(14px, 1.8vh, 26px);
  padding: clamp(14px, 1.6vh, 24px);
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}

.tpl-lesson-01 .neural-shell,
.tpl-lesson-01 .token-shell,
.tpl-lesson-01 .loop-shell { padding: 22px 22px 16px; }

/* === SVG ELEMENTS === */
.tpl-lesson-01 .nn-svg,
.tpl-lesson-01 .token-svg,
.tpl-lesson-01 .loop-svg,
.tpl-lesson-01 .stack-svg {
  width: 100%; height: auto; display: block;
}

.tpl-lesson-01 .nn-links line {
  stroke: color-mix(in srgb, var(--accent) 25%, #c0c8d4);
  stroke-width: 2.5;
}

.tpl-lesson-01 .nn-layer circle {
  fill: url(#nnGrad);
  stroke: white;
  stroke-width: 5;
}

.tpl-lesson-01 .nn-layer .nn-output {
  fill: var(--accent);
}

.tpl-lesson-01 .nn-labels text {
  font-size: 22px;
  font-weight: 600;
  fill: var(--text-2);
  text-anchor: middle;
  font-family: var(--font-mono);
  font-style: normal;
}

.tpl-lesson-01 .mini-legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 10px;
  color: var(--text-3);
  font-size: clamp(12px, 0.9vw, 14px);
  font-family: var(--font-mono);
}

.tpl-lesson-01 .mini-legend span {
  padding: 5px 10px;
  border-radius: 3px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.tpl-lesson-01 .token-boxes rect,
.tpl-lesson-01 .stack-band rect {
  fill: var(--surface);
  stroke: color-mix(in srgb, var(--accent) 30%, var(--border));
  stroke-width: 2;
}

.tpl-lesson-01 .token-arrows path {
  stroke: var(--accent);
  stroke-width: 3;
  fill: none;
}

.tpl-lesson-01 .token-text text,
.tpl-lesson-01 .stack-text text {
  fill: var(--text-1);
  font-size: 21px;
  font-weight: 600;
  text-anchor: middle;
}

.tpl-lesson-01 .token-svg { max-width: 860px; margin: 0 auto; }
.tpl-lesson-01 .loop-svg  { max-width: 760px; margin: 0 auto; }

.tpl-lesson-01 .prob-bars rect {
  fill: color-mix(in srgb, var(--accent) 70%, #a0b4c8);
}

.tpl-lesson-01 .compact-cards { margin-top: 14px; }

.tpl-lesson-01 .loop-path {
  stroke: var(--accent);
  stroke-width: 3;
  fill: none;
  stroke-linecap: round;
  opacity: 0.65;
}

.tpl-lesson-01 .loop-node circle {
  fill: var(--surface);
  stroke: var(--accent);
  stroke-width: 3;
}

.tpl-lesson-01 .loop-label text { fill: var(--text-1); text-anchor: middle; }
.tpl-lesson-01 .loop-label text:nth-child(odd)  { font-size: 19px; font-weight: 700; }
.tpl-lesson-01 .loop-label text:nth-child(even) { font-size: 13px; fill: var(--text-2); }

.tpl-lesson-01 .stack-svg { margin: 8px 0 16px; }

.tpl-lesson-01 .package-svg,
.tpl-lesson-01 .harness-svg,
.tpl-lesson-01 .ide-svg,
.tpl-lesson-01 .examples-svg,
.tpl-lesson-01 .hermes-svg,
.tpl-lesson-01 .staircase-svg {
  width: 100%; height: auto; display: block;
  max-width: 860px; margin: 0 auto 12px;
}

.tpl-lesson-01 .package-boxes rect,
.tpl-lesson-01 .harness-lanes rect,
.tpl-lesson-01 .ide-boxes rect,
.tpl-lesson-01 .ide-window rect,
.tpl-lesson-01 .examples-core rect,
.tpl-lesson-01 .examples-branches rect,
.tpl-lesson-01 .hermes-nodes rect,
.tpl-lesson-01 .stair-step rect {
  fill: var(--surface);
  stroke: color-mix(in srgb, var(--accent) 25%, var(--border));
  stroke-width: 2;
}

.tpl-lesson-01 .package-lines path,
.tpl-lesson-01 .harness-arrows path,
.tpl-lesson-01 .ide-arrows path,
.tpl-lesson-01 .examples-lines path,
.tpl-lesson-01 .hermes-lines path,
.tpl-lesson-01 .stack-rail path {
  stroke: var(--accent);
  stroke-width: 3;
  fill: none;
  marker-end: url(#tokenArrow);
}

.tpl-lesson-01 .package-text text,
.tpl-lesson-01 .harness-text text,
.tpl-lesson-01 .ide-text text,
.tpl-lesson-01 .examples-text text,
.tpl-lesson-01 .hermes-text text,
.tpl-lesson-01 .stair-text text {
  fill: var(--text-1);
  font-size: 21px;
  font-weight: 600;
  text-anchor: middle;
}

.tpl-lesson-01 .ide-window circle:nth-child(1) { fill: #c0c0c0; }
.tpl-lesson-01 .ide-window circle:nth-child(2) { fill: #c0c0c0; }
.tpl-lesson-01 .ide-window circle:nth-child(3) { fill: #c0c0c0; }

.tpl-lesson-01 .package-shell .compact-cards,
.tpl-lesson-01 .harness-shell .compact-cards { margin-top: 10px; }

.tpl-lesson-01 .examples-shell,
.tpl-lesson-01 .hermes-shell,
.tpl-lesson-01 .stack-shell-top,
.tpl-lesson-01 .stair-shell { padding-bottom: 14px; }

.tpl-lesson-01 .examples-text text:nth-child(even),
.tpl-lesson-01 .hermes-text text:nth-child(even) { font-size: 16px; fill: var(--text-2); }

.tpl-lesson-01 .hermes-rings circle {
  fill: none;
  stroke: color-mix(in srgb, var(--accent) 18%, var(--border));
  stroke-width: 2;
  stroke-dasharray: 6 8;
}

.tpl-lesson-01 .staircase-svg { margin: 4px 0 14px; }

/* === FLOW BOXES === */
.tpl-lesson-01 .flow { display: grid; gap: 12px; }
.tpl-lesson-01 .flow-box {
  position: relative;
  padding: 14px 18px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.tpl-lesson-01 .flow-box::after {
  content: "↓";
  position: absolute;
  left: 50%; bottom: -22px;
  transform: translateX(-50%);
  color: var(--accent);
  font-size: 16px;
}
.tpl-lesson-01 .flow-box:last-child::after { display: none; }
.tpl-lesson-01 .flow-box h4 { margin: 0 0 5px; font-size: 20px; font-family: var(--font-display); font-style: italic; }
.tpl-lesson-01 .flow-box p  { margin: 0; font-size: 16px; line-height: 1.6; color: var(--text-2); font-family: var(--font-serif); }

/* === TWO-CASE === */
.tpl-lesson-01 .two-case {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 20px; margin-top: 22px;
}
.tpl-lesson-01 .case-title {
  display: inline-block; margin-bottom: 8px;
  padding: 4px 10px; border-radius: 3px;
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--bg-soft); color: var(--accent);
  font-family: var(--font-mono);
}

/* === PROMPT BOX === */
.tpl-lesson-01 .prompt-box {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 6px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.1vw, 16px);
  line-height: 1.75;
  color: var(--text-2);
  white-space: pre-wrap;
}

/* === GLOSSARY === */
.tpl-lesson-01 .glossary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 16px;
  margin-top: 22px;
}

.tpl-lesson-01 .glossary dt {
  margin: 0 0 4px;
  font-size: clamp(16px, 1.3vw, 20px);
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 700;
  color: var(--text-1);
}

.tpl-lesson-01 .glossary dd {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(13px, 1.0vw, 16px);
  line-height: 1.6;
  font-family: var(--font-serif);
}

/* === TAKEAWAYS === */
.tpl-lesson-01 .takeaway-list {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.tpl-lesson-01 .takeaway {
  padding: clamp(10px, 1.1vh, 15px) 18px;
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  background: var(--surface);
  color: var(--text-2);
  line-height: 1.6;
  font-size: clamp(14px, 1.2vw, 18px);
  font-family: var(--font-serif);
  box-shadow: var(--shadow);
}

/* === FOOTER / MISC === */
.tpl-lesson-01 .mini { color: var(--text-3); font-size: 14px; line-height: 1.5; }

.tpl-lesson-01 .deck-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: auto; padding-top: 16px;
  color: var(--text-3); font-size: 13px; font-family: var(--font-mono);
}

/* === TAB SHELL === */
.tpl-lesson-01 .tab-shell {
  margin-top: 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.tpl-lesson-01 .tab-buttons {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 16px 16px 0;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.tpl-lesson-01 .tab-btn {
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px 14px;
  background: var(--surface);
  color: var(--text-2);
  font-size: clamp(12px, 0.95vw, 15px);
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.tpl-lesson-01 .tab-btn:hover,
.tpl-lesson-01 .tab-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.tpl-lesson-01 .tab-panels { padding: 16px; }

.tpl-lesson-01 .tab-panel {
  display: none;
  min-height: 140px;
  padding: 16px;
  border-radius: 6px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}

.tpl-lesson-01 .tab-panel.is-active { display: block; }

.tpl-lesson-01 .tab-panel h3 {
  margin: 0 0 8px;
  font-size: clamp(18px, 1.5vw, 24px);
  font-family: var(--font-display);
  font-style: italic;
  color: var(--text-1);
}

.tpl-lesson-01 .tab-panel p {
  margin: 0;
  color: var(--text-2);
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.65;
  max-width: 48rem;
  font-family: var(--font-serif);
}

/* === WHY CONFUSION — overlapping circles === */
.tpl-lesson-01 .confusion-svg { width: 100%; height: auto; display: block; max-width: 860px; margin: 0 auto; }
.tpl-lesson-01 .conf-circles ellipse {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  opacity: 0.55;
}
.tpl-lesson-01 .conf-circles ellipse:nth-child(1) { transform: none; }
.tpl-lesson-01 .conf-circles ellipse:nth-child(2) { opacity: 0.45; }
.tpl-lesson-01 .conf-circles ellipse:nth-child(3) { opacity: 0.55; }
.tpl-lesson-01 .conf-labels text { font-size: 18px; font-weight: 600; fill: var(--text-2); text-anchor: middle; font-family: var(--font-mono); letter-spacing: 0.04em; }
.tpl-lesson-01 .conf-question { font-size: 52px; font-weight: 700; fill: var(--accent); text-anchor: middle; font-style: italic; opacity: 0.35; }
.tpl-lesson-01 .conf-overlap { font-size: 13px; fill: var(--text-3); text-anchor: middle; font-family: var(--font-mono); }

/* === MODEL / PRODUCT — nested wrapper === */
.tpl-lesson-01 .mp-svg { width: 100%; height: auto; display: block; max-width: 880px; margin: 0 auto; }
.tpl-lesson-01 .mp-product rect { fill: color-mix(in srgb, var(--accent) 5%, var(--bg-soft)); stroke: color-mix(in srgb, var(--accent) 45%, var(--border)); stroke-width: 2; }
.tpl-lesson-01 .mp-model rect { fill: color-mix(in srgb, var(--accent) 11%, white); stroke: var(--accent); stroke-width: 2.5; }
.tpl-lesson-01 .mp-side rect { fill: var(--surface); stroke: color-mix(in srgb, var(--accent) 35%, var(--border)); stroke-width: 2; }
.tpl-lesson-01 .mp-arrow { stroke: var(--accent); stroke-width: 3; fill: none; stroke-linecap: round; }
.tpl-lesson-01 .mp-title { font-size: 21px; font-weight: 700; fill: var(--text-1); text-anchor: middle; font-style: italic; }
.tpl-lesson-01 .mp-sub { font-size: 13px; fill: var(--text-3); text-anchor: middle; font-family: var(--font-mono); }
.tpl-lesson-01 .mp-node { font-size: 20px; font-weight: 600; fill: var(--text-1); text-anchor: middle; font-style: italic; }

/* === CHAT vs AGENT — two-panel comparison === */
.tpl-lesson-01 .ca-svg { width: 100%; height: auto; display: block; max-width: 880px; margin: 0 auto; }
.tpl-lesson-01 .ca-box rect { fill: var(--surface); stroke: color-mix(in srgb, var(--accent) 35%, var(--border)); stroke-width: 2; }
.tpl-lesson-01 .ca-agent rect { fill: color-mix(in srgb, var(--accent) 7%, var(--bg-soft)); stroke: var(--accent); stroke-width: 2; }
.tpl-lesson-01 .ca-divider { stroke: var(--border-strong); stroke-width: 1.5; stroke-dasharray: 6 5; }
.tpl-lesson-01 .ca-arrow { stroke: var(--accent); stroke-width: 3; fill: none; stroke-linecap: round; }
.tpl-lesson-01 .ca-loop-arc { stroke: color-mix(in srgb, var(--accent) 50%, var(--border)); stroke-width: 2.5; fill: none; stroke-linecap: round; }
.tpl-lesson-01 .ca-panel-header { font-size: 20px; font-weight: 700; fill: var(--text-1); text-anchor: middle; font-style: italic; }
.tpl-lesson-01 .ca-text text { font-size: 19px; font-weight: 600; fill: var(--text-1); text-anchor: middle; }
.tpl-lesson-01 .ca-caption { font-size: 13px !important; fill: var(--text-3) !important; font-family: var(--font-mono); font-weight: 400 !important; font-style: normal !important; }
.tpl-lesson-01 .ca-loop-label { font-size: 13px !important; fill: var(--text-3) !important; font-family: var(--font-mono); font-weight: 400 !important; font-style: normal !important; }

/* === LLM TRANSITION — before/after loop === */
.tpl-lesson-01 .trans-svg { width: 100%; height: auto; display: block; max-width: 880px; margin: 0 auto; }
.tpl-lesson-01 .trans-plain rect { fill: var(--surface); stroke: color-mix(in srgb, var(--accent) 35%, var(--border)); stroke-width: 2; }
.tpl-lesson-01 .trans-loop-outer rect { fill: color-mix(in srgb, var(--accent) 7%, var(--bg-soft)); stroke: var(--accent); stroke-width: 2; }
.tpl-lesson-01 .trans-arrow { stroke: var(--accent); stroke-width: 3; fill: none; stroke-linecap: round; }
.tpl-lesson-01 .trans-big-arrow { stroke: var(--text-3); stroke-width: 2.5; fill: none; }
.tpl-lesson-01 .trans-loop-arc { stroke: color-mix(in srgb, var(--accent) 50%, var(--border)); stroke-width: 2.5; fill: none; stroke-linecap: round; }
.tpl-lesson-01 .trans-panel { font-size: 17px; font-weight: 700; fill: var(--text-3); text-anchor: middle; font-style: italic; }
.tpl-lesson-01 .trans-text text { font-size: 19px; font-weight: 600; fill: var(--text-1); text-anchor: middle; }
.tpl-lesson-01 .trans-change { font-size: 14px; fill: var(--text-3); text-anchor: middle; font-family: var(--font-mono); }
.tpl-lesson-01 .trans-loop-label { font-size: 14px; fill: var(--accent); text-anchor: middle; font-family: var(--font-mono); letter-spacing: 0.08em; }
.tpl-lesson-01 .trans-caption { font-size: 13px; fill: var(--text-3); text-anchor: middle; font-family: var(--font-mono); }

/* === MEMORY — working vs persistent === */
.tpl-lesson-01 .mem-svg { width: 100%; height: auto; display: block; max-width: 880px; margin: 0 auto; }
.tpl-lesson-01 .mem-outer rect { fill: color-mix(in srgb, var(--accent) 5%, var(--bg-soft)); stroke: color-mix(in srgb, var(--accent) 30%, var(--border)); stroke-width: 2; }
.tpl-lesson-01 .mem-rows rect { fill: color-mix(in srgb, var(--accent) 10%, white); stroke: none; }
.tpl-lesson-01 .mem-faded { opacity: 0.35; }
.tpl-lesson-01 .mem-records rect { fill: var(--surface); stroke: color-mix(in srgb, var(--accent) 25%, var(--border)); stroke-width: 1.5; }
.tpl-lesson-01 .mem-label { font-size: 20px; font-weight: 700; fill: var(--text-1); text-anchor: middle; font-style: italic; }
.tpl-lesson-01 .mem-sublabel { font-size: 13px; fill: var(--text-3); text-anchor: middle; font-family: var(--font-mono); }
.tpl-lesson-01 .mem-record-text text { font-size: 15px; fill: var(--text-2); text-anchor: middle; font-family: var(--font-mono); }