:root {
  --ink: #1b1b1b;
  --paper: #fcfbf8;
  --paper-deep: #dcdad5;
  --accent: #575ecf;
  --accent-2: #f858bc;
  --accent-3: #fe3f21;
  --accent-4: #fe7b02;
  --muted: #6c6b67;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(27, 27, 25, 0.12);
  --shadow-soft: 0 8px 26px rgba(27, 27, 25, 0.08);
  --radius: 18px;
  --radius-small: 12px;
  --font-body: "Space Grotesk", sans-serif;
  --font-display: "Fraunces", serif;
  --font-mono: "JetBrains Mono", monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: linear-gradient(135deg, #fcfbf8 0%, #f3f2f2 45%, #f8f1ff 100%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 999px;
  z-index: 0;
  opacity: 0.18;
  filter: blur(0px);
}

body::before {
  background: radial-gradient(circle, #f858bc 0%, rgba(248, 88, 188, 0) 70%);
  top: -120px;
  right: -120px;
}

body::after {
  background: radial-gradient(circle, #575ecf 0%, rgba(87, 94, 207, 0) 70%);
  bottom: -160px;
  left: -160px;
}

main,
header,
footer {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 1rem 6vw;
  background: rgba(252, 251, 248, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 30px rgba(27, 27, 25, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 0.6rem;
  font-weight: 500;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.nav-links a:hover {
  background: rgba(87, 94, 207, 0.12);
  color: var(--accent);
  transform: translateY(-1px);
}

.hero {
  padding: 3rem 6vw 5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 2.5rem;
  align-items: center;
}

.path-hero {
  padding-top: 2.5rem;
}

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 3.8vw, 4rem);
  margin: 0.6rem 0 1.2rem;
  line-height: 1.05;
}

.lead {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #2a2926;
  max-width: 34rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
}

.math-glyph {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 1.1rem;
  color: var(--accent-2);
  font-family: var(--font-display);
  transform: translateY(1px);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 1.5rem 0 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: var(--shadow-soft);
}

.btn.ghost {
  border-color: var(--ink);
  color: var(--ink);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.stat-row {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}

.stat {
  background: rgba(255, 255, 255, 0.7);
  padding: 0.9rem 1.2rem;
  border-radius: var(--radius-small);
  box-shadow: var(--shadow-soft);
}

.stat-value {
  display: block;
  font-weight: 600;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.hero-panel {
  display: grid;
  gap: 1.5rem;
}

.panel-card {
  background: var(--white);
  padding: 1.6rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.panel-card.accent {
  background: linear-gradient(135deg, rgba(15, 124, 123, 0.12), rgba(242, 164, 58, 0.12));
  border: 1px solid rgba(15, 124, 123, 0.2);
}

.panel-title {
  font-weight: 600;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
}

.panel-steps {
  margin: 0;
  padding-left: 1.2rem;
  line-height: 1.6;
}

.panel-list {
  margin: 0;
  padding-left: 1.2rem;
  line-height: 1.7;
}

.panel-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.text-link {
  font-weight: 600;
  color: var(--accent);
}

.section {
  padding: 2.5rem 6vw 3.5rem;
}

.section-heading {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-heading h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin: 0 0 0.6rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.2rem 0 1.8rem;
}

.download-card {
  display: block;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(27, 27, 25, 0.08);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border 0.18s ease;
}

.download-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(87, 94, 207, 0.35);
}

.download-title {
  font-weight: 600;
  font-size: 1rem;
}

.download-note {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.card {
  background: var(--white);
  padding: 1.6rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.card.outline {
  background: rgba(255, 255, 255, 0.5);
  border: 1px dashed rgba(27, 27, 25, 0.2);
}

.card h3 {
  margin: 0;
  font-size: 1.3rem;
}

.card p {
  margin: 0;
  color: #2b2b27;
}

.card-tag {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent-4);
  font-weight: 600;
}

.card-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pill {
  background: rgba(15, 124, 123, 0.14);
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.feature {
  background: rgba(255, 255, 255, 0.7);
  padding: 1.4rem;
  border-radius: var(--radius-small);
  box-shadow: var(--shadow-soft);
}

.feature h3 {
  margin: 0 0 0.6rem;
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

.page {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 1fr);
  gap: 2.5rem;
  padding: 2rem 6vw 4rem;
}

.side-nav {
  position: sticky;
  top: 1.2rem;
  align-self: start;
  background: rgba(255, 255, 255, 0.7);
  padding: 1.2rem;
  border-radius: var(--radius-small);
  box-shadow: var(--shadow-soft);
}

.side-title {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

.side-links {
  list-style: none;
  margin: 0 0 1.4rem;
  padding: 0;
}

.side-links li {
  margin-bottom: 0.6rem;
}

.side-links a {
  font-weight: 500;
}

.side-links a.active {
  color: var(--accent);
  font-weight: 600;
  background: rgba(87, 94, 207, 0.1);
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-small);
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.4rem;
}

.toc a {
  font-size: 0.9rem;
  color: #2a2926;
}

.lesson {
  background: rgba(255, 255, 255, 0.85);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lesson-header {
  margin-bottom: 1.6rem;
}

.lesson-header h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  margin: 0.6rem 0 0.8rem;
}

.progress {
  background: rgba(15, 124, 123, 0.12);
  border-radius: 999px;
  height: 12px;
  position: relative;
  overflow: hidden;
  margin-top: 1.2rem;
}

.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.3s ease;
}

.progress-label {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  font-weight: 600;
  color: #1f1f1c;
}

.lesson-content h2 {
  margin-top: 2rem;
  font-size: 1.6rem;
  border-bottom: 1px solid rgba(27, 27, 25, 0.12);
  padding-bottom: 0.4rem;
}

.lesson-content h3 {
  margin-top: 1.5rem;
  font-size: 1.2rem;
}

.lesson-content p {
  line-height: 1.7;
}

.lesson-content pre {
  background: #161814;
  color: #f7f2e8;
  padding: 1rem;
  border-radius: var(--radius-small);
  overflow-x: auto;
  font-family: var(--font-mono);
}

.lesson-content code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.lesson-content blockquote {
  margin: 1rem 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--accent);
  background: rgba(15, 124, 123, 0.08);
}

.callout {
  border-radius: var(--radius-small);
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.9);
}

.callout-title {
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
}

.callout.try {
  border-color: rgba(15, 124, 123, 0.5);
  background: rgba(15, 124, 123, 0.08);
}

.callout.predict {
  border-color: rgba(242, 164, 58, 0.7);
  background: rgba(242, 164, 58, 0.12);
}

.callout.check {
  border-color: rgba(61, 90, 128, 0.6);
  background: rgba(61, 90, 128, 0.12);
}

.callout.reflect {
  border-color: rgba(227, 107, 91, 0.6);
  background: rgba(227, 107, 91, 0.12);
}

.note-label {
  display: block;
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.note-field {
  width: 100%;
  min-height: 120px;
  margin-top: 0.5rem;
  border-radius: var(--radius-small);
  border: 1px solid rgba(27, 27, 25, 0.2);
  padding: 0.7rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.9);
}

.check-details {
  margin-top: 0.6rem;
}

.check-details summary {
  cursor: pointer;
  font-weight: 600;
}

.answer-key {
  margin-top: 1rem;
  background: rgba(15, 124, 123, 0.08);
  padding: 0.8rem 1rem;
  border-radius: var(--radius-small);
}

.answer-key summary {
  cursor: pointer;
  font-weight: 600;
}

.code-block {
  position: relative;
}

.copy-button {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  border: none;
  background: rgba(255, 255, 255, 0.14);
  color: #f7f2e8;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  cursor: pointer;
}

.copy-button:hover {
  background: rgba(255, 255, 255, 0.25);
}

.site-footer {
  padding: 2rem 6vw 2.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.profile-card {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 2rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  align-items: start;
}

.profile-photo {
  width: 100%;
  border-radius: var(--radius);
  object-fit: cover;
  aspect-ratio: 4 / 5;
  box-shadow: var(--shadow-soft);
}

.profile-content h3 {
  margin: 0.2rem 0 0.6rem;
  font-size: 1.6rem;
}

.profile-title {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0;
}

.profile-links {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin: 1rem 0 1.4rem;
}

.profile-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.profile-list {
  margin: 0;
  padding-left: 1.1rem;
  line-height: 1.6;
}

.profile-list li {
  margin-bottom: 0.4rem;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: fadeUp 0.7s ease forwards;
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .page {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

@media (max-width: 680px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 2rem;
  }

  .lesson {
    padding: 1.4rem;
  }

  .profile-card {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body.page-zero {
  --accent: #575ecf;
  --accent-2: #f858bc;
  --accent-3: #fe3f21;
  --accent-4: #fe7b02;
}

.hero-compact {
  padding: 2.5rem 6vw 2rem;
}

.hero-zero .hero-copy h1 {
  max-width: 32rem;
}

.dataset-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.dataset-preview {
  margin: 2rem 0;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow-soft);
}

.dataset-preview-header h2 {
  margin: 0 0 0.4rem;
}

.data-preview {
  overflow-x: auto;
  margin-top: 1rem;
}

.data-preview table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-preview th,
.data-preview td {
  text-align: left;
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid rgba(27, 27, 25, 0.1);
}

.data-preview th {
  font-weight: 600;
  color: var(--accent-4);
}

.data-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}

.summary-card {
  background: rgba(15, 124, 123, 0.08);
  border-radius: var(--radius-small);
  padding: 0.8rem;
  font-size: 0.85rem;
}

.summary-card strong {
  display: block;
  margin-bottom: 0.3rem;
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin: 1.6rem 0;
}

.decision-card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-small);
  padding: 1rem;
  border: 1px solid rgba(27, 27, 25, 0.08);
}

.decision-card h3 {
  margin: 0 0 0.4rem;
}

.math-toggle {
  margin: 1rem 0;
  border-radius: var(--radius-small);
  border: 1px solid rgba(31, 111, 84, 0.25);
  padding: 0.6rem 0.8rem;
  background: rgba(31, 111, 84, 0.06);
}

.math-toggle summary {
  cursor: pointer;
  font-weight: 600;
}

.math-block {
  margin-top: 0.6rem;
  line-height: 1.6;
}

.method-lab {
  display: grid;
  gap: 2rem;
}

.lab-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.lab-step {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow-soft);
}

.chip-grid {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.8rem;
}

.chip {
  display: grid;
  gap: 0.2rem;
  text-align: left;
  border-radius: var(--radius-small);
  border: 1px solid rgba(27, 27, 25, 0.12);
  background: rgba(255, 255, 255, 0.9);
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
  font-family: var(--font-body);
}

.chip:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.chip.active {
  border-color: var(--accent-2);
  box-shadow: var(--shadow-soft);
}

.chip-label {
  font-weight: 600;
}

.chip-hint {
  font-size: 0.82rem;
  color: var(--muted);
}

.lab-summary {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.summary-card {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow-soft);
}

.summary-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.4rem;
}

.copy-note {
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1.2rem;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.method-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.method-card pre {
  background: rgba(27, 27, 25, 0.06);
  border-radius: var(--radius-small);
  padding: 0.7rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.method-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.glossary-term {
  background: none;
  border: none;
  color: var(--accent);
  font-weight: 600;
  border-bottom: 1px dashed var(--accent);
  padding: 0;
  cursor: pointer;
}

.glossary-term[aria-expanded="true"] {
  color: var(--accent-3);
  border-bottom-color: var(--accent-3);
}

.glossary-bubble {
  position: absolute;
  background: #ffffff;
  border-radius: var(--radius-small);
  padding: 0.6rem 0.8rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(27, 27, 25, 0.12);
  font-size: 0.85rem;
  max-width: 240px;
  z-index: 10;
}

.data-visual {
  margin: 1.2rem 0 1.6rem;
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow-soft);
}

.data-visual canvas {
  width: 100%;
  height: 320px;
}

.script-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
}

.script-card {
  background: var(--white);
  padding: 1.4rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 220px;
}

.script-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.script-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.script-tag {
  background: rgba(31, 111, 84, 0.12);
  color: var(--accent);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}

.filter-bar {
  margin-top: 1.6rem;
  display: grid;
  gap: 1rem;
}

.search-input {
  padding: 0.8rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(27, 27, 25, 0.2);
  font-size: 0.95rem;
  font-family: var(--font-body);
}

.filter-chips {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.filter-chip {
  border: 1px solid rgba(31, 111, 84, 0.35);
  background: rgba(31, 111, 84, 0.08);
  color: var(--accent);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}

.filter-chip.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.script-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.6rem;
}

.script-meta .pill {
  background: rgba(61, 90, 128, 0.15);
  color: var(--accent-4);
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.6rem;
}

.workspace-card {
  background: rgba(255, 255, 255, 0.92);
  padding: 1.6rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.field-label {
  display: block;
  margin-top: 0.8rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.field-input {
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-small);
  border: 1px solid rgba(27, 27, 25, 0.2);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.workspace-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.file-input {
  display: none;
}

.model-selector {
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow-soft);
  margin: 1.4rem 0 2rem;
}

.model-selector-controls {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.model-tab {
  border: 1px solid rgba(31, 111, 84, 0.3);
  background: rgba(31, 111, 84, 0.08);
  color: var(--accent);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}

.model-tab.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.model-panel {
  display: none;
  padding: 0.8rem 0.6rem 0.2rem;
}

.model-panel.active {
  display: block;
}

/* Shared visual language for the reference and applied-lesson pages. */
body.page-zero{--accent:#185f4a;--accent-2:#587c54;--accent-3:#9c5e17;--accent-4:#80520b;--muted:#53645b}
:root{--ink:#172c28;--paper:#f6f6f1;--paper-deep:#d9dfd6;--accent:#185f4a;--accent-2:#587c54;--accent-3:#9c5e17;--accent-4:#80520b;--muted:#61706b;--radius:9px;--radius-small:6px;--shadow:0 9px 28px #23352a0a;--shadow-soft:0 4px 14px #23352a07;--font-body:system-ui,-apple-system,sans-serif;--font-display:system-ui,-apple-system,sans-serif;--font-mono:ui-monospace,'SFMono-Regular',monospace}
body{background:var(--paper)}body::before,body::after{display:none}.site-header{background:#fbfcf8;box-shadow:none;border-bottom:1px solid #d9dfd6;padding:17px 5vw}.nav{gap:24px}.brand{font-size:21px;letter-spacing:-.7px;white-space:nowrap}.nav-links{gap:6px 12px;font-size:12px}.nav-links a{border-radius:4px;padding:7px 9px}.nav-links a:hover{transform:none;background:#e8efdf;color:#185f4a}.hero{padding:50px 6vw}.hero-copy h1{font-size:clamp(30px,3.5vw,49px);letter-spacing:-1.5px;font-weight:650;line-height:1.14}.lead{font-size:15px;line-height:1.8;color:#53645b}.eyebrow{font-size:10px;letter-spacing:1.5px}.card,.panel-card,.workspace-card{border:1px solid #d9dfd6;box-shadow:none;border-radius:8px}.card:hover{transform:none;box-shadow:none;border-color:#9ab08d}.panel-card.accent{background:#edf3e7;color:#234932}.panel-card.accent .panel-title{color:#185f4a}.btn{border-radius:5px;font-size:12px}.btn.primary{background:#185f4a;color:white;border-color:#185f4a}.btn.ghost{border-color:#cbd7c5;background:white;color:#185f4a}.card-tag,.pill{color:#48603c;background:#edf3e7}.section-heading h2{letter-spacing:-.8px}.section-heading p,.card p{color:#53645b}.reveal{animation:none;opacity:1;transform:none}.site-footer{border-top:1px solid #d9dfd6;background:#f1f4eb;color:#61706b;font-size:11px}.callout{border-radius:5px;box-shadow:none}.callout.try,.callout.predict,.callout.reflect,.callout.check{background:#f3f6ed;border-color:#b9ceb0}.callout-title{color:#185f4a}.copy-button{border-radius:4px}.skip-link{position:fixed;top:-80px;left:15px;z-index:100;padding:10px;background:white}.skip-link:focus{top:10px}:focus-visible{outline:3px solid #b36a06;outline-offset:3px}.practice-entry{border:1px solid #c9d9bd;background:#edf4e5;padding:19px 22px;border-radius:7px;margin:18px 0 26px;font-size:14px;line-height:1.7}.practice-entry a{text-decoration:underline;font-weight:600}.practice-entry p{margin:5px 0 0;color:#52634e;font-size:13px}
@media(max-width:760px){.site-header{padding:14px 20px}.nav{display:block}.nav-links{margin-top:12px;gap:3px 10px;font-size:11px}.nav-links a{padding:6px 0}.hero{padding:30px 22px}.hero-copy h1{letter-spacing:-1px}.lead{font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.search-result-title {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 3px;
}
.search-result-title:hover,
.search-result-title:focus-visible {
  text-decoration: underline;
}