/* ============================================================
   BARRIXA™ Interactive Sales Tool — Master Stylesheet
   Professional B2B Dark-Teal Theme
   ============================================================ */

:root {
  --bg-base:      #0a0f1e;
  --bg-surface:   #111827;
  --bg-card:      #151e2d;
  --bg-card2:     #1a2435;
  --border:       rgba(99,160,200,0.15);
  --border-bright:rgba(99,160,200,0.35);

  --accent:       #00c8ff;
  --accent2:      #0ea5e9;
  --accent-glow:  rgba(0,200,255,0.18);
  --gold:         #f59e0b;
  --green:        #10b981;
  --red:          #ef4444;
  --purple:       #8b5cf6;

  /* Variant colours */
  --ultra:  #ff4d6d;
  --prime:  #f59e0b;
  --pro:    #10b981;
  --smart:  #60a5fa;

  --text-primary:   #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  --radius:  12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 24px rgba(0,200,255,0.12);

  --font-body: 'Inter', sans-serif;
  --font-display: 'Rajdhani', sans-serif;
}

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

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 60px;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }

/* ============================================================
   HEADER
   ============================================================ */
#main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,15,30,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 0 16px var(--accent-glow);
}
.brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}
.brand-name sup { font-size: 11px; color: var(--accent); }
.brand-tagline {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-top: -2px;
}
.main-nav {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 7px;
}
.nav-btn:hover { color: var(--accent); border-color: var(--border-bright); background: var(--accent-glow); }
.nav-btn.active { color: var(--accent); border-color: var(--accent); background: var(--accent-glow); box-shadow: var(--shadow-glow); }
.header-badge {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  color: #0a0f1e;
  font-size: 10px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

/* ============================================================
   TAB SECTIONS
   ============================================================ */
#app { max-width: 1400px; margin: 0 auto; padding: 24px; }
.tab-section { display: none; }
.tab-section.active { display: block; }

/* ============================================================
   HERO BANNER
   ============================================================ */
.hero-banner {
  background: linear-gradient(135deg, #0d1f35 0%, #0a1628 50%, #071424 100%);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 48px 40px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.hero-banner::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,200,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-banner::after {
  content: 'BARRIXA™';
  position: absolute;
  bottom: -20px; right: 40px;
  font-family: var(--font-display);
  font-size: 120px;
  font-weight: 700;
  color: rgba(255,255,255,0.02);
  letter-spacing: 8px;
  pointer-events: none;
}
.hero-content h1 {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 12px;
}
.hero-content h1 .accent { color: var(--accent); }
.hero-content p { color: var(--text-secondary); font-size: 15px; max-width: 480px; }
.hero-stats {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}
.stat-pill {
  background: rgba(0,200,255,0.08);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 16px 24px;
  text-align: center;
  min-width: 90px;
}
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-lbl {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

/* ============================================================
   WIZARD
   ============================================================ */
.wizard-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.wizard-progress {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 36px;
  gap: 0;
}
.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}
.progress-step span { font-size: 12px; color: var(--text-muted); transition: color 0.3s; }
.progress-step.active span { color: var(--accent); }
.progress-step.done span { color: var(--green); }
.ps-circle {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-muted);
  transition: all 0.3s;
  background: var(--bg-card);
}
.progress-step.active .ps-circle {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.progress-step.done .ps-circle {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
}
.progress-line {
  flex: 1;
  height: 2px;
  background: var(--border);
  min-width: 60px;
  max-width: 120px;
  margin-bottom: 22px;
}

.wizard-step { animation: fadeIn 0.3s ease; }
.wizard-step.hidden { display: none; }

.step-title { font-family: var(--font-display); font-size: 22px; font-weight: 600; margin-bottom: 6px; }
.step-sub { color: var(--text-secondary); font-size: 13px; margin-bottom: 24px; }

/* Category Grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.cat-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
}
.cat-card:hover, .cat-card.selected {
  border-color: var(--accent);
  background: rgba(0,200,255,0.07);
  box-shadow: 0 0 16px var(--accent-glow);
  transform: translateY(-2px);
}
.cat-card .cat-icon { font-size: 32px; margin-bottom: 8px; display: block; }
.cat-card .cat-name { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.cat-card .cat-count { font-size: 10px; color: var(--text-muted); margin-top: 3px; }

/* Step 2 layout */
.step2-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 20px; }
.sku-panel, .conditions-panel {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.sku-panel h3, .conditions-panel h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--accent);
}
.sku-search-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-bottom: 12px;
}
.sku-search-wrap i { color: var(--text-muted); }
.sku-search-wrap input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  flex: 1;
}
.sku-list { max-height: 340px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.sku-item {
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  color: var(--text-secondary);
  transition: all 0.2s;
  border: 1px solid transparent;
  line-height: 1.4;
}
.sku-item:hover { background: var(--bg-surface); color: var(--text-primary); border-color: var(--border); }
.sku-item.selected { background: rgba(0,200,255,0.1); color: var(--accent); border-color: var(--accent); }
.sku-item .sku-name { font-weight: 600; }
.sku-item .sku-meta { font-size: 10px; color: var(--text-muted); margin-top: 2px; }

/* Form groups */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 8px; }
.form-group select, .form-group input[type="number"], .form-group input[type="text"] {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 9px 12px;
  outline: none;
  transition: border-color 0.2s;
}
.form-group select:focus, .form-group input:focus { border-color: var(--accent); }

.toggle-group { display: flex; flex-wrap: wrap; gap: 6px; }
.tgl-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.tgl-btn:hover { border-color: var(--border-bright); color: var(--text-primary); }
.tgl-btn.active { background: var(--accent); border-color: var(--accent); color: #0a0f1e; font-weight: 700; }

/* CTA Buttons */
.cta-btn {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  color: #0a0f1e;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.3px;
}
.cta-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(0,200,255,0.35); }
.cta-btn.secondary { background: linear-gradient(135deg, var(--gold) 0%, #d97706 100%); color: #0a0f1e; }
.cta-btn.ghost { background: transparent; border: 1px solid var(--border-bright); color: var(--text-secondary); }
.cta-btn.ghost:hover { color: var(--accent); border-color: var(--accent); }
.cta-btn.full-width { width: 100%; justify-content: center; margin-top: 8px; }

.back-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  transition: color 0.2s;
}
.back-btn:hover { color: var(--accent); }

/* Result layout */
.result-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.result-card-main {
  background: linear-gradient(135deg, rgba(0,200,255,0.08) 0%, rgba(14,165,233,0.04) 100%);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 0 32px var(--accent-glow);
}
.result-alternates {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.result-alt-card {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  cursor: pointer;
  transition: all 0.2s;
}
.result-alt-card:hover { border-color: var(--border-bright); transform: translateX(4px); }

.recommended-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #0a0f1e;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 12px;
}
.variant-name {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}
.variant-ultra { color: var(--ultra); }
.variant-prime { color: var(--prime); }
.variant-pro   { color: var(--pro); }
.variant-smart { color: var(--smart); }

.spec-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.spec-row:last-child { border-bottom: none; }
.spec-row .spec-lbl { color: var(--text-muted); }
.spec-row .spec-val { font-weight: 600; color: var(--text-primary); }

.result-table-wrap { margin-top: 20px; }
.result-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ============================================================
   SECTION HEADER
   ============================================================ */
.section-header { margin-bottom: 28px; }
.section-header h2 { font-family: var(--font-display); font-size: 26px; font-weight: 700; margin-bottom: 6px; }
.section-header p { color: var(--text-secondary); font-size: 14px; }

/* ============================================================
   CHARTS & CARDS
   ============================================================ */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
}
.chart-card.wide { grid-column: 1 / -1; }
.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.chart-header h3 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}
.chart-header h3 i { color: var(--accent); }
.chart-wrap { position: relative; }
.chart-legend { display: flex; gap: 12px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text-secondary); }
.legend-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* Matrix table */
.matrix-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.matrix-table th, .matrix-table td { padding: 8px 12px; border: 1px solid var(--border); text-align: center; }
.matrix-table th { background: var(--bg-card2); color: var(--text-secondary); font-weight: 600; }
.matrix-table td { background: var(--bg-surface); }
.matrix-cell-yes  { background: rgba(16,185,129,0.15) !important; color: var(--green); font-weight: 700; }
.matrix-cell-best { background: rgba(0,200,255,0.15) !important; color: var(--accent); font-weight: 700; }
.matrix-cell-no   { background: rgba(100,116,139,0.05) !important; color: var(--text-muted); }

/* Spec Table */
.spec-table-wrap { overflow-x: auto; }
.spec-full-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.spec-full-table th, .spec-full-table td { padding: 10px 14px; border: 1px solid var(--border); }
.spec-full-table thead th { background: var(--bg-card2); color: var(--text-secondary); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; }
.spec-full-table tbody tr:nth-child(odd) { background: var(--bg-surface); }
.spec-full-table tbody tr:hover { background: rgba(0,200,255,0.05); }
.spec-full-table .grade-ultra { color: var(--ultra); font-weight: 700; }
.spec-full-table .grade-prime { color: var(--prime); font-weight: 700; }
.spec-full-table .grade-pro   { color: var(--pro); font-weight: 700; }
.spec-full-table .grade-smart { color: var(--smart); font-weight: 700; }

/* ============================================================
   CALCULATOR
   ============================================================ */
.calc-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.calc-placeholder { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.calc-placeholder i { font-size: 48px; margin-bottom: 16px; display: block; opacity: 0.4; }
.calc-results.active .calc-placeholder { display: none; }

.roi-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.roi-metric {
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.roi-metric.highlight {
  border-color: var(--accent);
  background: rgba(0,200,255,0.07);
}
.roi-metric-val {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.roi-metric.positive .roi-metric-val { color: var(--green); }
.roi-metric.negative .roi-metric-val { color: var(--red); }
.roi-metric-lbl { font-size: 11px; color: var(--text-muted); }

.calc-chart-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ============================================================
   DATABASE
   ============================================================ */
.db-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.db-search-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  flex: 1;
  min-width: 220px;
}
.db-search-wrap i { color: var(--text-muted); }
.db-search-wrap input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 13px;
  flex: 1;
}
.db-filters { display: flex; gap: 10px; flex-wrap: wrap; }
.db-filters select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 12px;
  padding: 8px 12px;
  outline: none;
  cursor: pointer;
}
.db-filters select:focus { border-color: var(--accent); }
.db-count { font-size: 12px; color: var(--text-muted); white-space: nowrap; }
.db-count strong { color: var(--accent); }

.db-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
.db-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.db-table thead { position: sticky; top: 0; z-index: 5; }
.db-table th {
  background: var(--bg-card2);
  padding: 12px 14px;
  text-align: left;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}
.db-table th:hover { color: var(--accent); }
.db-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: top;
}
.db-table tbody tr:hover td { background: rgba(0,200,255,0.04); color: var(--text-primary); }
.db-table tbody tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.3px;
}
.badge-ultra  { background: rgba(255,77,109,0.15); color: var(--ultra); border: 1px solid rgba(255,77,109,0.3); }
.badge-prime  { background: rgba(245,158,11,0.15); color: var(--prime); border: 1px solid rgba(245,158,11,0.3); }
.badge-pro    { background: rgba(16,185,129,0.15); color: var(--pro);   border: 1px solid rgba(16,185,129,0.3); }
.badge-smart  { background: rgba(96,165,250,0.15); color: var(--smart); border: 1px solid rgba(96,165,250,0.3); }
.badge-coastal{ background: rgba(14,165,233,0.15); color: #38bdf8; border: 1px solid rgba(14,165,233,0.3); }
.badge-inland { background: rgba(139,92,246,0.15); color: #a78bfa; border: 1px solid rgba(139,92,246,0.3); }
.badge-both   { background: rgba(100,116,139,0.15); color: #94a3b8; border: 1px solid rgba(100,116,139,0.3); }

.db-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.pg-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}
.pg-btn:hover, .pg-btn.active { background: var(--accent-glow); color: var(--accent); border-color: var(--accent); }
.pg-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ============================================================
   VARIANT LEGEND
   ============================================================ */
.variant-legend {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: rgba(15,22,38,0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 11px;
  z-index: 50;
  box-shadow: var(--shadow);
}
.vl-title { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 8px; }
.vl-item { display: flex; align-items: center; gap: 8px; padding: 3px 0; }
.vl-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.vl-item.ultra .vl-dot { background: var(--ultra); }
.vl-item.prime .vl-dot { background: var(--prime); }
.vl-item.pro   .vl-dot { background: var(--pro); }
.vl-item.smart .vl-dot { background: var(--smart); }
.vl-item strong { color: var(--text-primary); }
.vl-item { color: var(--text-muted); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 12px 16px; gap: 12px; }
  .main-nav { gap: 2px; }
  .nav-btn { padding: 7px 10px; font-size: 11px; }
  .hero-banner { flex-direction: column; text-align: center; padding: 32px 20px; }
  .hero-content h1 { font-size: 26px; }
  .hero-stats { justify-content: center; }
  .compare-grid { grid-template-columns: 1fr; }
  .chart-card.wide { grid-column: 1; }
  .step2-layout { grid-template-columns: 1fr; }
  .result-layout { grid-template-columns: 1fr; }
  .calc-layout { grid-template-columns: 1fr; }
  .calc-chart-row { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .roi-summary { grid-template-columns: 1fr 1fr; }
  .variant-legend { bottom: 12px; right: 12px; }
  #app { padding: 16px; }
}
@media (max-width: 600px) {
  .category-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .roi-summary { grid-template-columns: 1fr; }
  .brand-tagline { display: none; }
}