/* ── Pleco Kineτics — Design System ──────────────────────────────────────── */

:root {
  --teal:        #2D7A6B;
  --teal-light:  #3d9b89;
  --teal-dim:    rgba(45, 122, 107, 0.12);
  --charcoal:    #2A2825;
  --cream:       #f5f0e8;
  --cream-light: #faf8f4;
  --gray:        #8a8680;
  --gray-light:  #d4d0ca;
  --white:       #ffffff;
  --font-serif:  'IBM Plex Serif', Georgia, 'Times New Roman', serif;
  --font-mono:   'SF Mono', 'Fira Mono', 'Consolas', monospace;
  --font-sans:   'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset ───────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--cream);
  color: var(--charcoal);
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }

/* ── Wordmark ────────────────────────────────────────────────────────────── */
.wordmark {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.wordmark .pleco { color: var(--charcoal); }
.wordmark .kinetics { color: var(--teal); }
.wordmark .tau {
  font-size: 1.15em;
  position: relative;
  top: -0.02em;
  display: inline-block;
}

/* ── Layout ──────────────────────────────────────────────────────────────── */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: 760px; }
.container--wide { max-width: 1320px; }

/* ── Navigation ──────────────────────────────────────────────────────────── */
.nav {
  background: var(--cream-light);
  border-bottom: 1px solid var(--gray-light);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 24px;
  max-width: 1120px;
  margin: 0 auto;
}
.nav__wordmark { font-size: 1.15rem; }
.nav__links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}
.nav__links a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--gray);
  transition: color 0.15s;
}
.nav__links a:hover,
.nav__links a.active { color: var(--teal); text-decoration: none; }
.nav__links .btn { margin-left: 8px; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 10px 22px;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn--primary {
  background: var(--teal);
  color: var(--white);
  border-color: var(--teal);
}
.btn--primary:hover {
  background: var(--teal-light);
  border-color: var(--teal-light);
  text-decoration: none;
  color: var(--white);
}
.btn--outline {
  background: transparent;
  color: var(--teal);
  border-color: var(--teal);
}
.btn--outline:hover {
  background: var(--teal-dim);
  text-decoration: none;
}
.btn--ghost {
  background: transparent;
  color: var(--gray);
  border-color: var(--gray-light);
}
.btn--ghost:hover {
  color: var(--charcoal);
  border-color: var(--gray);
  text-decoration: none;
}
.btn--lg { font-size: 0.9rem; padding: 14px 32px; }
.btn--sm { font-size: 0.75rem; padding: 7px 14px; }

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 64px;
  text-align: center;
  background: var(--cream);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('/static/pleco-rays.svg');
  background-size: cover;
  background-position: center bottom;
  opacity: 0.22;
  mask-image: radial-gradient(ellipse at center, transparent 0%, transparent 30%, black 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, transparent 0%, transparent 30%, black 70%);
  pointer-events: none;
}
.hero__wordmark {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-bottom: 16px;
}
.hero__tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--charcoal);
  font-weight: 700;
  margin-bottom: 12px;
}
.hero__subtitle {
  font-size: 0.95rem;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto 32px;
}
.hero__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Stats bar ───────────────────────────────────────────────────────────── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  overflow: hidden;
  margin: 40px 0;
  background: var(--cream-light);
}
.stats-bar__item {
  padding: 20px 24px;
  text-align: center;
  border-right: 1px solid var(--gray-light);
}
.stats-bar__item:last-child { border-right: none; }
.stats-bar__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal);
  line-height: 1.2;
}
.stats-bar__label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray);
  margin-top: 4px;
}

/* ── Section titles ──────────────────────────────────────────────────────── */
.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 6px;
}
.section-subtitle {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 24px;
}

/* ── Filter pills ────────────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  align-items: center;
}
.filter-bar__label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray);
  margin-right: 4px;
}
.pill {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: 5px 14px;
  border-radius: 20px;
  border: 1.5px solid var(--gray-light);
  background: var(--cream-light);
  color: var(--charcoal);
  cursor: pointer;
  transition: all 0.12s;
}
.pill:hover { border-color: var(--teal); color: var(--teal); }
.pill.active {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
}

/* ── Search ──────────────────────────────────────────────────────────────── */
.search-box {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 340px;
}
.search-box input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  border: 1.5px solid var(--gray-light);
  border-radius: 4px;
  background: var(--cream-light);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--charcoal);
  outline: none;
  transition: border-color 0.15s;
}
.search-box input:focus { border-color: var(--teal); }
.search-box__icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray);
  font-size: 0.9rem;
}

/* ── Data table ──────────────────────────────────────────────────────────── */
.data-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  background: var(--white);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.data-table th {
  background: var(--cream-light);
  border-bottom: 1.5px solid var(--gray-light);
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--gray);
  white-space: nowrap;
}
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--gray-light);
  vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:nth-child(even) td { background: var(--cream-light); }
.data-table tr:hover td { background: var(--teal-dim); cursor: pointer; }
.data-table .mono { font-family: var(--font-mono); font-size: 0.82rem; }
.data-table .compound-link { color: var(--teal); font-weight: 600; }
.data-table .compound-link:hover { text-decoration: underline; }

/* Row highlighting for GKSL rows */
.data-table tr.gksl td { background: rgba(45, 122, 107, 0.05); }
.data-table tr.gksl:hover td { background: var(--teal-dim); }

/* ── Badges ──────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
}
.badge--teal    { background: var(--teal-dim); color: var(--teal); }
.badge--gray    { background: var(--gray-light); color: var(--gray); }
.badge--tier1   { background: rgba(45, 122, 107, 0.15); color: var(--teal); }
.badge--tier2   { background: rgba(138, 134, 128, 0.15); color: var(--gray); }
.badge--inferred { background: #f0e8d4; color: #7a5c2a; }

/* ── Pagination ──────────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  justify-content: flex-end;
}
.pagination__info {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--gray);
  margin-right: auto;
}
.pagination button {
  padding: 6px 12px;
  border: 1.5px solid var(--gray-light);
  border-radius: 4px;
  background: var(--cream-light);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--charcoal);
  transition: all 0.12s;
}
.pagination button:hover:not(:disabled) { border-color: var(--teal); color: var(--teal); }
.pagination button:disabled { opacity: 0.4; cursor: default; }
.pagination button.active {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--white);
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--cream-light);
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  padding: 28px;
}
.card--teal {
  border-color: var(--teal);
  border-width: 2px;
  position: relative;
  overflow: hidden;
}
.card--teal::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/static/pleco-rays.svg');
  background-size: 120%;
  background-position: center bottom;
  opacity: 0.3;
  pointer-events: none;
}
.card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.card__body { font-size: 0.9rem; color: var(--gray); }

/* ── Grid ────────────────────────────────────────────────────────────────── */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}

/* ── Prediction form ─────────────────────────────────────────────────────── */
.predict-form {
  background: var(--cream-light);
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  padding: 32px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-light);
  border-radius: 4px;
  background: var(--white);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--charcoal);
  outline: none;
  transition: border-color 0.15s;
}
.form-group textarea {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  min-height: 80px;
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--teal); }
.form-hint {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--gray);
  margin-top: 6px;
}

/* ── Prediction result ───────────────────────────────────────────────────── */
.result-card {
  background: var(--white);
  border: 2px solid var(--teal);
  border-radius: 8px;
  padding: 32px;
  margin-top: 32px;
  display: none;
}
.result-card.visible { display: block; }
.result-tau {
  font-size: clamp(2rem, 5vw, 3rem);
  font-family: var(--font-mono);
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 4px;
}
.result-tau-label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 20px;
}
.result-ci {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--gray);
  margin-bottom: 20px;
}
.result-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  padding: 16px;
  background: var(--cream);
  border-radius: 4px;
}
.result-meta__item label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 3px;
}
.result-meta__item span {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--charcoal);
  font-weight: 600;
}

/* ── Pricing cards ───────────────────────────────────────────────────────── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px 0;
}
@media (max-width: 900px) { .pricing-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .pricing-grid { grid-template-columns: 1fr; } }

.pricing-card {
  background: var(--cream-light);
  border: 1.5px solid var(--gray-light);
  border-radius: 10px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}
.pricing-card--featured {
  border-color: var(--teal);
  border-width: 2px;
  position: relative;
}
.pricing-card--featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--teal);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 20px;
}
.pricing-card__tier {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 12px;
}
.pricing-card__price {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1;
  margin-bottom: 4px;
}
.pricing-card__period {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--gray);
  margin-bottom: 20px;
}
.pricing-card__tagline {
  font-size: 0.8rem;
  color: var(--gray);
  font-style: italic;
  margin-bottom: 20px;
  min-height: 2.4em;
}
.pricing-card__features {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}
.pricing-card__features li {
  font-size: 0.85rem;
  padding: 5px 0;
  color: var(--charcoal);
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.pricing-card__features li::before {
  content: '✓';
  color: var(--teal);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.pricing-card .btn { width: 100%; justify-content: center; }

/* ── FAQ ─────────────────────────────────────────────────────────────────── */
.faq { margin-top: 56px; }
.faq__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 24px;
}
.faq__item {
  border-bottom: 1px solid var(--gray-light);
  padding: 18px 0;
}
.faq__question {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--charcoal);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.faq__question::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--teal);
  font-weight: 400;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq__item.open .faq__question::after { content: '−'; }
.faq__answer {
  font-size: 0.9rem;
  color: var(--gray);
  padding-top: 12px;
  display: none;
  line-height: 1.7;
}
.faq__item.open .faq__answer { display: block; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--gray-light);
  padding: 40px 0;
  text-align: center;
  margin-top: 80px;
}
.footer__fish {
  width: 48px;
  height: auto;
  margin: 0 auto 16px;
  opacity: 0.3;
}
.footer__wordmark {
  font-size: 1rem;
  margin-bottom: 10px;
}
.footer__meta {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--gray);
  line-height: 2;
}
.footer__meta a { color: var(--gray); }
.footer__meta a:hover { color: var(--teal); }

/* ── Loading & error states ──────────────────────────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gray);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 20px 0;
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--gray-light);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-msg {
  background: #fdf0ee;
  border: 1.5px solid #e8b4ad;
  border-radius: 4px;
  padding: 12px 16px;
  color: #9e3b2e;
  font-size: 0.88rem;
  margin: 12px 0;
}

/* ── Validation scatter plot ─────────────────────────────────────────────── */
.scatter-wrap {
  position: relative;
  background: var(--cream-light);
  border-radius: 6px;
  overflow: hidden;
}
.scatter-wrap canvas { width: 100% !important; }

.accuracy-table th, .accuracy-table td {
  text-align: center;
}
.accuracy-table .pct { font-family: var(--font-mono); font-weight: 700; color: var(--teal); }

/* ── Comparison table ────────────────────────────────────────────────────── */
.comparison-table td:nth-child(3),
.comparison-table td:nth-child(4) { font-family: var(--font-mono); font-size: 0.82rem; }
.comparison-table tr.highlight-row td { background: var(--teal-dim); font-weight: 700; }
.comparison-table tr.highlight-row td:nth-child(3),
.comparison-table tr.highlight-row td:nth-child(4) { color: var(--teal); }

/* ── Section spacing ─────────────────────────────────────────────────────── */
.section { padding: 48px 0; }
.section--gray { background: var(--cream-light); }
.section--grid-bg {
  background-image: url('/static/grid-bg.svg');
  background-repeat: repeat;
  background-size: 20px 20px;
}

/* ── Divider ─────────────────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--gray-light);
  margin: 40px 0;
}

/* ── Usage counter ───────────────────────────────────────────────────────── */
.usage-bar {
  background: var(--cream-light);
  border: 1px solid var(--gray-light);
  border-radius: 4px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}
.usage-bar__track {
  flex: 1;
  height: 6px;
  background: var(--gray-light);
  border-radius: 3px;
  overflow: hidden;
}
.usage-bar__fill {
  height: 100%;
  background: var(--teal);
  border-radius: 3px;
  transition: width 0.3s;
}
.usage-bar__label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--gray);
  white-space: nowrap;
}

/* ── Auth modal ──────────────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(42, 40, 37, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.visible { display: flex; }
.modal {
  background: var(--cream-light);
  border-radius: 10px;
  padding: 36px;
  width: 100%;
  max-width: 420px;
  position: relative;
}
.modal__close {
  position: absolute;
  top: 16px; right: 16px;
  background: none; border: none;
  font-size: 1.2rem; cursor: pointer;
  color: var(--gray);
}
.modal__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 24px;
}

/* ── Compound detail ─────────────────────────────────────────────────────── */
.compound-header {
  padding: 36px 0 24px;
}
.compound-header__name {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.compound-header__meta {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--gray);
}

.rank-bar {
  background: var(--cream-light);
  border: 1px solid var(--gray-light);
  border-radius: 6px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.rank-bar__label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 8px;
}
.rank-bar__track {
  height: 8px;
  background: var(--gray-light);
  border-radius: 4px;
  position: relative;
  overflow: visible;
  margin-bottom: 8px;
}
.rank-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  border-radius: 4px;
}
.rank-bar__marker {
  position: absolute;
  top: -4px;
  width: 16px; height: 16px;
  background: var(--teal);
  border: 2px solid var(--white);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.rank-bar__desc {
  font-size: 0.82rem;
  color: var(--gray);
}

/* ── Validation page ─────────────────────────────────────────────────────── */
.validation-card {
  background: var(--cream-light);
  border: 1px solid var(--gray-light);
  border-radius: 10px;
  padding: 28px;
  margin-bottom: 32px;
}
.validation-card__header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.validation-card__target {
  font-size: 1.3rem;
  font-weight: 700;
}
.validation-card__r2 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--teal);
  font-weight: 700;
}
.validation-card__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
@media (max-width: 700px) { .validation-card__body { grid-template-columns: 1fr; } }

.nilotinib-callout {
  background: var(--white);
  border: 2px solid var(--teal);
  border-radius: 8px;
  padding: 28px;
  margin: 32px 0;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.nilotinib-callout__text { flex: 1; min-width: 200px; }
.nilotinib-callout__diagram {
  flex: 0 0 auto;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--gray);
}
.nilotinib-callout__arrow {
  font-size: 1.4rem;
  color: var(--teal);
  margin: 8px 0;
}
.nilotinib-callout__tau {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--teal);
}

/* ── Misc utilities ──────────────────────────────────────────────────────── */
.text-teal   { color: var(--teal); }
.text-gray   { color: var(--gray); }
.text-mono   { font-family: var(--font-mono); }
.text-sans   { font-family: var(--font-sans); }
.text-center { text-align: center; }
.mb-0  { margin-bottom: 0; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-8  { gap: 8px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }