/* ===== DESIGN SYSTEM ===== */
:root {
  --ink: #1a1410;
  --paper: #faf7f2;
  --cream: #f2ede4;
  --tan: #e8ddc8;
  --warm-gray: #c4b9a8;
  --muted: #8a7f72;
  --gold: #b8860b;
  --gold-light: #d4a017;
  --gold-pale: #f5e6b8;
  --rust: #8b3a2a;
  --sage: #4a6741;
  --sage-light: #6b8f62;
  --navy: #1e2d3d;
  --navy-mid: #2e4460;
  --blue-pale: #d6e4f0;
  --border: #d4c9b8;
  --shadow: rgba(26,20,16,0.12);
  --radius: 10px;
  --radius-lg: 16px;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== LAYOUT ===== */
.page { display: none; min-height: 100vh; }
.page.active { display: block; }

/* ===== NAV ===== */
nav {
  background: var(--ink);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--gold-light);
  letter-spacing: 0.02em;
  cursor: pointer;
  display: flex;
  align-items: center;
  min-width: 0;
  flex-shrink: 1;
  gap: 0.5rem;
}
.nav-brand span { font-size: 1.5rem; }
.nav-links { display: flex; gap: 0.5rem; align-items: center; flex-shrink: 0; }
.nav-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.75);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-family: var(--font-body);
  transition: all 0.2s;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.nav-btn:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); color: #fff; }
.nav-btn.primary {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
  font-weight: 500;
}
.nav-btn.primary:hover { background: var(--gold-light); }

/* ===== LANDING ===== */
.hero {
  background: var(--ink);
  padding: 5rem 2rem 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(184,134,11,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-paw {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  display: block;
  animation: sway 3s ease-in-out infinite;
}
@keyframes sway { 0%,100%{transform:rotate(-5deg)} 50%{transform:rotate(5deg)} }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  color: var(--paper);
  line-height: 1.1;
  margin-bottom: 0.75rem;
}
.hero h1 em { color: var(--gold-light); font-style: italic; }
.hero-sub {
  font-size: 1.1rem;
  color: var(--warm-gray);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--gold);
  color: #fff;
  padding: 0.9rem 2.2rem;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 20px rgba(184,134,11,0.4);
  font-family: var(--font-body);
  letter-spacing: 0.02em;
}
.hero-cta:hover { background: var(--gold-light); transform: translateY(-2px); box-shadow: 0 6px 24px rgba(184,134,11,0.5); }
.hero-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 1rem;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.8);
  padding: 0.9rem 1.8rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.2s;
}
.hero-cta-secondary:hover { border-color: rgba(255,255,255,0.6); color: #fff; background: rgba(255,255,255,0.05); }

.section { padding: 4rem 2rem; max-width: 900px; margin: 0 auto; }
.section-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-top: 2.5rem; }

.feature-card {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px var(--shadow); }
.feature-icon { font-size: 2rem; margin-bottom: 0.8rem; }
.feature-card h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--navy); }
.feature-card p { font-size: 0.9rem; color: var(--muted); line-height: 1.6; }

.story-section {
  background: var(--cream);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}
.story-inner { max-width: 800px; margin: 0 auto; }
.story-section h2 { font-family: var(--font-display); font-size: 2rem; margin-bottom: 1.5rem; color: var(--navy); }
.story-section p { color: var(--muted); line-height: 1.8; margin-bottom: 1rem; font-size: 0.95rem; }
.ace-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--navy);
  color: var(--gold-pale);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.section-sub { color: var(--muted); font-size: 0.95rem; margin-bottom: 0; }

.divider { height: 1px; background: var(--border); margin: 0 2rem; }

/* ===== WIZARD ===== */
.wizard-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: calc(100vh - 60px);
}
.wizard-sidebar {
  background: var(--ink);
  padding: 2rem 1.2rem;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.wizard-sidebar-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--warm-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  padding-left: 0.5rem;
}
.step-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 0.25rem;
  color: rgba(255,255,255,0.45);
  font-size: 0.88rem;
}
.step-item.active { background: rgba(184,134,11,0.2); color: var(--gold-light); }
.step-item.done { color: rgba(255,255,255,0.7); }
.step-item.done .step-num { background: var(--sage); color: #fff; }
.step-item:hover:not(.active) { background: rgba(255,255,255,0.05); color: rgba(255,255,255,0.7); }
.step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
  transition: all 0.2s;
}
.step-item.active .step-num { background: var(--gold); color: #fff; }
.step-label { line-height: 1.2; }

.wizard-content { padding: 2.5rem; overflow-y: auto; background: var(--paper); }
.wizard-header { margin-bottom: 2rem; }
.wizard-header h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  color: var(--navy);
  margin-bottom: 0.3rem;
}
.wizard-header p { color: var(--muted); font-size: 0.92rem; }

/* ===== FORM ELEMENTS ===== */
.form-group { margin-bottom: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}
label .hint {
  font-weight: 400;
  color: var(--muted);
  font-size: 0.8rem;
  margin-left: 0.3rem;
}

input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  font-size: 0.92rem;
  font-family: var(--font-body);
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(184,134,11,0.15);
}
textarea { resize: vertical; min-height: 80px; }

.range-row { display: flex; align-items: center; gap: 0.8rem; }
input[type="range"] {
  flex: 1;
  height: 6px;
  appearance: none;
  background: var(--tan);
  border-radius: 3px;
  border: none;
  cursor: pointer;
  padding: 0;
  box-shadow: none;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gold);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
input[type="range"]:focus { box-shadow: none; border: none; }
.range-val {
  min-width: 45px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--navy);
  font-weight: 500;
}

.breed-block {
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  margin-bottom: 0.8rem;
  position: relative;
}
.breed-block-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.8rem; }
.breed-block-title { font-size: 0.85rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.remove-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.remove-btn:hover { background: #fee; border-color: var(--rust); color: var(--rust); }

.add-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1.5px dashed var(--border);
  color: var(--muted);
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.88rem;
  font-family: var(--font-body);
  transition: all 0.2s;
  width: 100%;
  justify-content: center;
}
.add-btn:hover { border-color: var(--gold); color: var(--gold); background: var(--gold-pale); }

.percent-sum {
  font-size: 0.82rem;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  margin-top: 0.8rem;
  font-family: var(--font-mono);
}
.percent-sum.ok { background: #e8f5e9; color: var(--sage); }
.percent-sum.warn { background: #fff3e0; color: #b85c00; }

/* Dental log */
.dental-log {
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 0.5rem;
}
.dental-log-header {
  display: grid;
  grid-template-columns: 1fr 1fr 60px;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--tan);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.dental-log-row {
  display: grid;
  grid-template-columns: 1fr 1fr 60px;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--border);
  align-items: center;
  font-size: 0.88rem;
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from{opacity:0;transform:translateY(-4px)} to{opacity:1;transform:none} }
.dental-log-row:nth-child(even) { background: rgba(255,255,255,0.5); }
.log-tag {
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--blue-pale);
  color: var(--navy-mid);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.del-log-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  opacity: 0.6;
  transition: all 0.2s;
  padding: 0.2rem;
}
.del-log-btn:hover { color: var(--rust); opacity: 1; }

.dental-add-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.5rem;
  padding: 0.8rem 1rem;
  border-top: 1px solid var(--border);
  align-items: end;
  background: #fff;
}
.dental-add-row input, .dental-add-row select {
  font-size: 0.86rem;
  padding: 0.5rem 0.7rem;
}
.add-log-btn {
  background: var(--navy);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.84rem;
  font-family: var(--font-body);
  white-space: nowrap;
  transition: background 0.2s;
}
.add-log-btn:hover { background: var(--navy-mid); }

/* measurement log */
.measurement-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-top: 0.5rem;
}
.measurement-table th {
  background: var(--tan);
  padding: 0.6rem 0.8rem;
  text-align: left;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}
.measurement-table td {
  padding: 0.5rem 0.8rem;
  border-bottom: 1px solid var(--border);
}
.measurement-table tr:nth-child(even) td { background: var(--cream); }
.measurement-table input {
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
  border-radius: 6px;
}

/* Info card */
.info-card {
  background: var(--blue-pale);
  border: 1px solid #b3d4ec;
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  display: flex;
  gap: 0.8rem;
  font-size: 0.88rem;
  color: var(--navy-mid);
  margin-bottom: 1.5rem;
}
.info-card-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.1rem; }

.source-list { margin-top: 1rem; }
.source-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}
.source-item:last-child { border-bottom: none; }
.source-item a { color: var(--navy-mid); text-decoration: none; border-bottom: 1px solid var(--border); transition: color 0.2s; }
.source-item a:hover { color: var(--gold); border-color: var(--gold); }
.source-breed-tag {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--tan);
  color: var(--muted);
  font-weight: 500;
  white-space: nowrap;
}

/* Wizard nav */
.wizard-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
}
.btn {
  padding: 0.7rem 1.6rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}
.btn-primary { background: var(--gold); color: #fff; box-shadow: 0 2px 8px rgba(184,134,11,0.3); }
.btn-primary:hover { background: var(--gold-light); transform: translateY(-1px); }
.btn-secondary { background: var(--cream); border: 1.5px solid var(--border); color: var(--ink); }
.btn-secondary:hover { border-color: var(--muted); background: var(--tan); }
.btn-success { background: var(--sage); color: #fff; box-shadow: 0 2px 8px rgba(74,103,65,0.3); }
.btn-success:hover { background: var(--sage-light); }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.84rem; }
.btn-danger { background: #fee; border: 1px solid #fcc; color: var(--rust); }
.btn-danger:hover { background: #fcc; }

/* Results page */
.results-layout { max-width: 960px; margin: 0 auto; padding: 2rem; }
.result-hero {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.result-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(184,134,11,0.2) 0%, transparent 60%);
  pointer-events: none;
}
.result-hero h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--warm-gray);
  font-weight: 400;
  margin-bottom: 0.3rem;
}
.result-dob {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--gold-light);
  margin-bottom: 0.5rem;
}
.result-range {
  font-size: 0.9rem;
  color: var(--warm-gray);
  font-family: var(--font-mono);
}
.confidence-bar-wrap { margin-top: 1.5rem; }
.confidence-label { font-size: 0.8rem; color: var(--warm-gray); margin-bottom: 0.4rem; letter-spacing: 0.05em; text-transform: uppercase; }
.confidence-bar { height: 8px; background: rgba(255,255,255,0.1); border-radius: 4px; overflow: hidden; }
.confidence-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, var(--gold), var(--gold-light)); transition: width 0.8s ease; }

.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.metric-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
}
.metric-card-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.4rem; font-weight: 600; }
.metric-card-value { font-size: 1.4rem; font-family: var(--font-display); color: var(--navy); margin-bottom: 0.2rem; }
.metric-card-sub { font-size: 0.8rem; color: var(--muted); }
.metric-card.primary { border-color: var(--gold); background: var(--gold-pale); }
.metric-card.primary .metric-card-value { color: var(--gold); }

.chart-card {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.chart-card h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--navy); margin-bottom: 0.3rem; }
.chart-card .chart-sub { font-size: 0.82rem; color: var(--muted); margin-bottom: 1rem; }
.chart-wrap { position: relative; }

.export-bar {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  padding: 1.5rem;
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 2rem;
  align-items: center;
}
.export-bar-label { font-size: 0.88rem; font-weight: 600; color: var(--navy); flex: 1; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-weight: 500;
  font-family: var(--font-mono);
}
.badge-gold { background: var(--gold-pale); color: var(--gold); }
.badge-navy { background: var(--blue-pale); color: var(--navy-mid); }
.badge-sage { background: #e8f5e9; color: var(--sage); }

/* Checkbox group */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.checkbox-item { display: flex; align-items: center; gap: 0.4rem; cursor: pointer; }
.checkbox-item input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--gold); cursor: pointer; }
.checkbox-item label { font-size: 0.88rem; color: var(--navy); cursor: pointer; margin: 0; }

.radio-group { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.radio-item { display: flex; align-items: center; gap: 0.4rem; cursor: pointer; }
.radio-item input { accent-color: var(--gold); width: 16px; height: 16px; cursor: pointer; }
.radio-item label { font-size: 0.88rem; color: var(--navy); margin: 0; cursor: pointer; }

/* Tooltip */
.tooltip-wrap { position: relative; display: inline-block; }
.tooltip-icon { cursor: help; color: var(--muted); font-size: 0.85rem; border-bottom: 1px dotted var(--muted); }
.tooltip-text {
  display: none;
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--cream);
  font-size: 0.78rem;
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  white-space: nowrap;
  z-index: 50;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.tooltip-wrap:hover .tooltip-text { display: block; }

/* Weight accuracy badge */
.weight-accuracy {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}
.acc-badge {
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}
.acc-high { background: #e8f5e9; color: var(--sage); }
.acc-med { background: #fff3e0; color: #b85c00; }
.acc-low { background: #fce4ec; color: var(--rust); }

/* Restore banner */
.restore-banner {
  background: var(--gold-pale);
  border: 1.5px solid var(--gold);
  border-radius: var(--radius);
  padding: 1rem 1.3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}
.restore-banner-text { font-size: 0.9rem; color: var(--ink); }
.restore-banner-text strong { color: var(--gold); }

/* ===== RESPONSIVE / MOBILE ===== */
@media (max-width: 768px) {
  /* Nav */
  nav { padding: 0 1rem; height: 54px; }
  .nav-brand { font-size: 1.05rem; }
  .nav-btn { padding: 0.3rem 0.6rem; font-size: 0.75rem; }

  /* Hero */
  .hero { padding: 3rem 1.2rem 2.5rem; }
  .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-sub { font-size: 0.95rem; }
  .hero-cta { padding: 0.8rem 1.6rem; font-size: 0.95rem; }
  .hero-cta-secondary { margin-left: 0; margin-top: 0; }

  /* Sections */
  .section { padding: 2.5rem 1.2rem; }
  .section-grid { grid-template-columns: 1fr; gap: 1rem; }
  .story-section { padding: 2.5rem 1.2rem; }

  /* Wizard layout */
  .wizard-layout { grid-template-columns: 1fr; }
  .wizard-sidebar { display: none; }
  .wizard-content { padding: 1.2rem; }
  .wizard-header h2 { font-size: 1.4rem; }

  /* Forms */
  .form-row, .form-row-3 { grid-template-columns: 1fr; }

  /* Metric grid */
  .metric-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .metric-card-value { font-size: 1.1rem; }

  /* Results layout */
  .results-layout { padding: 1rem; }
  .result-hero { padding: 1.5rem 1rem; }
  .result-dob { font-size: clamp(1.6rem, 6vw, 2.5rem); }

  /* Export bar */
  .export-bar { flex-direction: column; align-items: stretch; }
  .export-bar .btn { text-align: center; }

  /* Chart panel */
  #autofit-panel { flex-direction: column; gap: 0.8rem; }
  #autofit-panel > div { min-width: unset; }

  /* About page sources */
  .source-item { flex-direction: column; gap: 0.3rem; }
  .source-breed-tag { align-self: flex-start; }

  /* Dental log add row */
  .dental-add-row { grid-template-columns: 1fr 1fr; gap: 0.4rem; }
  .dental-add-row .add-log-btn { grid-column: 1 / -1; }

  /* Measurement table */
  .measurement-table { font-size: 0.8rem; }
  .measurement-table input { width: 70px; }

  /* Wizard footer */
  .wizard-footer { flex-direction: column; gap: 0.6rem; align-items: stretch; }
  .wizard-footer > div { display: flex; justify-content: center; gap: 0.6rem; }

  /* QE rows */
  #qe-weight-rows > div,
  #qe-height-rows > div { grid-template-columns: 1fr 80px 60px 28px; }

  /* Footer */
  #site-footer { padding: 1.5rem 1rem; }
}

@media (max-width: 480px) {
  /* Extra small phones */
  .hero h1 { font-size: 1.9rem; }
  .metric-grid { grid-template-columns: 1fr; }
  .dental-log-header,
  .dental-log-row { grid-template-columns: 1fr 80px 30px; }
  .dental-log-row .log-tag { font-size: 0.72rem; }
  nav .nav-links { gap: 0.3rem; }

  /* About sources: hide breed tag on very small screens */
  .source-breed-tag { display: none; }

  /* SVG dental chart: allow horizontal scroll */
  #dental-svg { min-width: 580px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--warm-gray); }

/* Animations */
.fade-in { animation: fadeIn 0.3s ease; }

/* Toggle switches */
.toggle-wrap { display: flex; align-items: center; gap: 0.7rem; }
.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 11px;
  cursor: pointer;
  transition: 0.2s;
}
.toggle-slider::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle input:checked + .toggle-slider { background: var(--gold); }
.toggle input:checked + .toggle-slider::after { transform: translateX(18px); }
.toggle-label { font-size: 0.88rem; color: var(--navy); }

.step-progress {
  font-size: 0.78rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* Breed source accordion */
.breed-sources { margin-top: 1.5rem; }
.breed-src-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--navy);
  transition: all 0.2s;
}
.breed-src-header:hover { background: var(--tan); }
.breed-src-body {
  display: none;
  border: 1.5px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 1rem;
  background: #fff;
}
.breed-src-body.open { display: block; }