/* ============================================
   WATER INTAKE CALCULATOR — page-specific styles
   Inherits all variables from css/styles.css
   ============================================ */

/* ---- Page wrapper ---- */
.calc-page {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 420px;
  grid-template-rows: auto auto;
  gap: 48px;
  align-items: start;
}

/* ---- Left column: info ---- */
.calc-page-info {
  position: static;
}

.calc-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.calc-breadcrumb a { color: var(--text-dim); transition: color var(--transition); }
.calc-breadcrumb a:hover { color: var(--accent); }
.calc-breadcrumb i { font-size: 10px; }

.calc-page-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px 4px 8px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.22);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 18px;
}
body.light-theme .calc-page-tag {
  background: var(--blue-dim);
  border-color: rgba(37,99,235,0.2);
  color: var(--blue);
}
.calc-page-tag i { font-size: 13px; }

.calc-page-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: clamp(30px, 3.5vw, 48px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  color: var(--text);
  margin-bottom: 16px;
}
.calc-page-title span { color: var(--blue); }
body.light-theme .calc-page-title span { color: var(--accent); }

.calc-page-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* Feature pills */
.calc-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}
.calc-feature-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}
.calc-feature-pill i { color: var(--accent); font-size: 12px; }

.calc-page-content {
  margin-top: 0;
  min-width: 0;
}

.calc-page-content.fade-up {
  opacity: 1;
  transform: none;
  animation: none;
  transition: none;
  visibility: visible;
}

.content-block { margin-bottom: 40px; }
.content-block h2 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
  margin-bottom: 14px;
}
.content-block h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  margin-top: 20px;
}
.content-block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.content-block strong { color: var(--text); font-weight: 600; }

.example-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}
.example-box strong { color: var(--text); }

/* ---- Right column: calculator card ---- */
.calc-panel {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.calc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 60px var(--accent-dim);
}

.calc-card-header {
  padding: 20px 24px 18px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  display: none;
  align-items: center;
  gap: 12px;
}
@media (max-width: 1024px) {
  .calc-card-header { display: flex; }
}
.calc-card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--blue);
  flex-shrink: 0;
}
body.light-theme .calc-card-icon {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.2);
  color: var(--accent);
}
.calc-card-header-text h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}
.calc-card-header-text p { font-size: 12px; color: var(--text-dim); }

.calc-card-body { padding: 24px; }

.form-group { margin-bottom: 20px; }

.form-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-label i { color: var(--blue); font-size: 12px; }
body.light-theme .form-label i { color: var(--accent); }

.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.form-input:hover { border-color: var(--border-hover); }
.form-input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-dim);
  background: var(--surface);
}
body.light-theme .form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.form-input.error {
  border-color: var(--pink) !important;
  box-shadow: 0 0 0 3px var(--pink-dim) !important;
}

.form-select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

/* ============================================
   RADIO PILLS (Gender / Units)
   ============================================ */
.radio-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.radio-pill {
  flex: 1;
  min-width: 100px;
  cursor: pointer;
}

.radio-pill input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-pill span {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  text-align: center;
  cursor: pointer;
}
.radio-pill span i { font-size: 13px; }

.radio-pill input[type="radio"]:checked + span {
  background: var(--blue-dim);
  border-color: var(--blue);
  color: var(--blue);
  font-weight: 600;
}
body.light-theme .radio-pill input[type="radio"]:checked + span {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.radio-pill span:hover {
  border-color: var(--border-hover);
  color: var(--text);
}

/* Pregnancy group slide-in */
.pregnancy-group {
  overflow: hidden;
  animation: slideDown 0.3s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Calculate button */
.calc-btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 14px 20px;
  background: var(--accent);
  color: #0c0f1a;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
  margin-top: 4px;
}
body.light-theme .calc-btn-primary { color: #fff; }
.calc-btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  opacity: 0;
  transition: opacity 0.15s;
}
.calc-btn-primary:hover { box-shadow: 0 4px 20px var(--accent-glow); }
.calc-btn-primary:hover::after { opacity: 0.06; }
.calc-btn-primary:active { transform: scale(0.98); }
.calc-btn-primary i { font-size: 16px; }

/* Error toast */
.calc-error {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--pink-dim);
  border: 1px solid rgba(251,113,133,0.3);
  border-radius: var(--radius-sm);
  color: var(--pink);
  font-size: 14px;
  font-weight: 500;
  margin-top: 12px;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}
.calc-error.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
body.light-theme .calc-error {
  background: rgba(225,29,72,0.08);
  border-color: rgba(225,29,72,0.25);
}

/* ============================================
   RESULT CARD
   ============================================ */
.result-card {
  margin-top: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: none;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.result-card.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.result-hero {
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--blue-dim) 0%, transparent 60%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
body.light-theme .result-hero {
  background: linear-gradient(135deg, var(--accent-dim) 0%, transparent 60%);
}
.result-value-main {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -2px;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 4px;
}
.result-value-sub {
  font-size: 13px;
  color: var(--text-dim);
  font-weight: 500;
}

/* Stats grid */
.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
}
.result-stat {
  padding: 14px 18px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.result-stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.result-stat-value {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.5px;
}
.result-stat-unit {
  font-size: 11px;
  color: var(--text-dim);
}

/* Breakdown row */
.result-breakdown {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--surface);
}
.result-breakdown-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--blue);
  flex-shrink: 0;
  margin-top: 2px;
}
body.light-theme .result-breakdown-icon {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.2);
  color: var(--accent);
}
.result-breakdown-text { flex: 1; }
.result-breakdown-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 4px;
}
.result-breakdown-value {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
}

/* Tip row */
.result-tip {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-2);
}
.result-tip-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--orange-dim);
  border: 1px solid rgba(255,140,66,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--orange);
  flex-shrink: 0;
  margin-top: 2px;
}
.result-tip-text {
  flex: 1;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* ============================================
   DEHYDRATION SIGNS GRID
   ============================================ */
.signs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 20px 0;
}
.sign-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}
.sign-item:hover { border-color: var(--border-hover); }
.sign-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--blue);
  margin-top: 1px;
}
body.light-theme .sign-icon {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.18);
  color: var(--accent);
}
.sign-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}
.sign-text strong { color: var(--text); font-size: 13px; }

/* ============================================
   FAQ
   ============================================ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border-hover); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question i {
  font-size: 12px;
  color: var(--text-dim);
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question i {
  transform: rotate(180deg);
  color: var(--accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  padding: 0 18px;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 18px 16px;
}

/* ============================================
   USE-CASES GRID
   ============================================ */
.use-cases-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}
.use-case-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}
.use-case-card:hover { border-color: var(--border-hover); }
.use-case-icon {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--blue);
  margin-top: 1px;
}
body.light-theme .use-case-icon {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.18);
  color: var(--accent);
}
.use-case-text { display: flex; flex-direction: column; gap: 4px; }
.use-case-text strong { font-size: 14px; font-weight: 700; color: var(--text); }
.use-case-text span { font-size: 13px; line-height: 1.6; color: var(--text-muted); }

/* ============================================
   HOW-TO STEPS LIST
   ============================================ */
.steps-list {
  list-style: none;
  counter-reset: steps;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}
.steps-list li {
  counter-increment: steps;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}
.steps-list li::before {
  content: counter(steps);
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.25);
  color: var(--blue);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}
body.light-theme .steps-list li::before {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.2);
  color: var(--accent);
}
.steps-list li strong { color: var(--text); }

/* ============================================
   FORMULA BOX
   ============================================ */
.formula-box {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 20px 0;
}
body.light-theme .formula-box {
  background: var(--surface-2);
  border-left-color: var(--accent);
}
.formula-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--blue-dim);
  border-bottom: 1px solid var(--border);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
body.light-theme .formula-title {
  background: var(--accent-dim);
  color: var(--accent);
}
.formula-body {
  padding: 18px 20px;
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  line-height: 1.9;
  color: var(--text-muted);
}
.formula-var { color: var(--blue); font-weight: 600; }
body.light-theme .formula-var { color: var(--accent); }
.formula-note {
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
  font-family: 'DM Sans', sans-serif;
}

/* ============================================
   PEOPLE ALSO SEARCH FOR
   ============================================ */
.also-search-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.also-search-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}
.also-search-chip:hover {
  background: var(--blue-dim);
  border-color: var(--blue);
  color: var(--blue);
}
body.light-theme .also-search-chip:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.also-search-chip i { font-size: 12px; }

/* ============================================
   AD SLOT
   ============================================ */
.ad-slot {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px 40px;
}
.ad-slot > div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ============================================
   TOPIC CLUSTER SECTION
   ============================================ */
.topic-cluster-section {
  position: relative;
  z-index: 1;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.topic-cluster-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px;
}
.topic-cluster-header {
  max-width: 680px;
  margin-bottom: 40px;
}
.topic-cluster-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px 4px 8px;
  background: var(--purple-dim);
  border: 1px solid rgba(167,139,250,0.22);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  color: var(--purple);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.topic-cluster-header h2 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  letter-spacing: -0.8px;
  color: var(--text);
  margin-bottom: 12px;
}
.topic-cluster-header p { font-size: 15px; line-height: 1.75; color: var(--text-muted); }

.cluster-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  margin-bottom: 40px;
  align-items: start;
}
.cluster-primary {
  background: var(--surface);
  border: 2px solid var(--blue);
  border-radius: var(--radius);
  padding: 22px;
  position: relative;
}
body.light-theme .cluster-primary { border-color: var(--accent); }
.cluster-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--blue-dim) 0%, transparent 60%);
  pointer-events: none;
}
.cluster-primary-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue);
  margin-bottom: 10px;
}
body.light-theme .cluster-primary-label { color: var(--accent); }
.cluster-primary h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  position: relative;
}
.cluster-primary p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-muted);
  margin-bottom: 14px;
  position: relative;
}
.cluster-keywords { display: flex; flex-wrap: wrap; gap: 6px; position: relative; }
.cluster-keywords span {
  padding: 3px 9px;
  background: var(--blue-dim);
  border: 1px solid rgba(91,156,246,0.2);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  color: var(--blue);
}
body.light-theme .cluster-keywords span {
  background: var(--accent-dim);
  border-color: rgba(37,99,235,0.2);
  color: var(--accent);
}
.cluster-links {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.cluster-links h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-3);
}
.cluster-link-list { display: flex; flex-direction: column; }
.cluster-link-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.cluster-link-item:last-child { border-bottom: none; }
.cluster-link-item:hover { background: var(--surface-2); }
.cluster-link-icon {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--blue-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--blue);
}
body.light-theme .cluster-link-icon { background: var(--accent-dim); color: var(--accent); }
.cluster-link-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.cluster-link-text strong { font-size: 14px; font-weight: 600; color: var(--text); }
.cluster-link-text span { font-size: 12px; color: var(--text-dim); line-height: 1.4; }
.cluster-link-arrow {
  color: var(--text-dim);
  font-size: 12px;
  transition: transform var(--transition), color var(--transition);
}
.cluster-link-item:hover .cluster-link-arrow {
  transform: translateX(3px);
  color: var(--blue);
}
.cluster-link-all { background: var(--bg-2); }
.cluster-link-all .cluster-link-icon { background: var(--purple-dim); color: var(--purple); }

.cluster-crosslinks { padding-top: 32px; border-top: 1px solid var(--border); }
.cluster-crosslinks h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
  margin-bottom: 6px;
}
.cluster-crosslinks > p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.crosslink-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.crosslink-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.crosslink-card:hover {
  border-color: var(--blue);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
body.light-theme .crosslink-card:hover { border-color: var(--accent); }
.crosslink-card i { font-size: 20px; color: var(--blue); }
body.light-theme .crosslink-card i { color: var(--accent); }
.crosslink-card strong {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}
.crosslink-card span { font-size: 12px; line-height: 1.5; color: var(--text-dim); }

/* ============================================
   FADE-UP ANIMATION
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.5s ease forwards;
  animation-delay: 0.15s;
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .calc-page {
    grid-template-columns: 1fr;
    padding: 32px 20px 60px;
    gap: 32px;
  }
  .calc-page-info { position: static; }
  .calc-panel { position: static; order: 2; }
  .calc-page-content { order: 3; }
  .cluster-grid { grid-template-columns: 1fr; }
  .crosslink-grid { grid-template-columns: 1fr 1fr; }
  .use-cases-grid { grid-template-columns: 1fr 1fr; }
  .signs-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .calc-page { padding: 24px 16px 48px; gap: 24px; }
  .use-cases-grid { grid-template-columns: 1fr; }
  .signs-grid { grid-template-columns: 1fr; }
  .crosslink-grid { grid-template-columns: 1fr 1fr; }
  .also-search-grid { gap: 7px; }
  .topic-cluster-inner { padding: 36px 16px; }
  .result-value-main { font-size: 34px; }
  .result-stats { grid-template-columns: 1fr 1fr; }
  .crosslink-grid { grid-template-columns: 1fr; }
}

@media (min-width: 1025px) {
  .calc-page-info {
    grid-row: 1 / 2;
    grid-column: 1 / 2;
  }
  .calc-page-content {
    grid-row: 2 / 3;
    grid-column: 1 / 2;
  }
  .calc-panel {
    grid-row: 1 / 3;
    grid-column: 2 / 3;
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}