/* =====================================================
   CompoundCalc — Main Stylesheet
   Mobile-first, modern, optimized for Core Web Vitals
   ===================================================== */

/* ─── CSS VARIABLES ─────────────────────────────────── */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #e0e7ff;
  --accent: #10b981;
  --accent-light: #d1fae5;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --pink: #ec4899;

  /* Light mode */
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface2: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

.dark-mode {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface2: #162032;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.25);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
  --primary-light: rgba(99,102,241,0.18);
  --accent-light: rgba(16,185,129,0.15);
}

/* ─── RESET & BASE ───────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

img { max-width: 100%; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── HEADER ─────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
}

.logo i { color: var(--primary); font-size: 1.3rem; }
.logo strong { color: var(--primary); }

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
  text-decoration: none;
}

.site-nav a:hover { color: var(--primary); }

.theme-toggle {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ─── HERO SECTION ───────────────────────────────────── */
.hero-section {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%);
  padding: 48px 0 36px;
  border-bottom: 1px solid var(--border);
}

.dark-mode .hero-section {
  background: linear-gradient(135deg, rgba(99,102,241,0.12) 0%, rgba(16,185,129,0.08) 100%);
}

.hero-text { text-align: center; margin-top: 24px; }

h1 {
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto 20px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

.hero-badges span {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow);
}

.hero-badges i { color: var(--primary); }

/* ─── TRUST STATS BAR ────────────────────────────────── */
.trust-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.trust-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 32px;
}

.trust-num {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.trust-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 1px;
}

.trust-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .trust-stat { padding: 6px 18px; }
  .trust-num { font-size: 1.1rem; }
}

/* ─── AD BANNERS ─────────────────────────────────────── */
.ad-banner {
  position: relative;
  background: var(--surface2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.ad-label {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 0.65rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px;
  color: var(--text-subtle);
  font-size: 0.82rem;
  text-align: center;
  min-height: 80px;
}

.ad-placeholder i { font-size: 1.2rem; color: var(--border); }

.ad-placeholder-tall { min-height: 400px; flex-direction: column; }

.ad-top {
  margin-bottom: 20px;
  min-height: 100px;
}

.ad-results {
  margin: 28px 0;
  min-height: 120px;
}

.ad-mid {
  margin: 20px 0;
  min-height: 80px;
}

.ad-sidebar { min-height: 400px; }

/* ─── MAIN CALCULATOR LAYOUT ─────────────────────────── */
.main-content {
  padding: 40px 0 60px;
}

.calculator-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 32px;
  align-items: start;
}

/* ─── CALCULATOR PANEL ───────────────────────────────── */
.sticky-calc {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.calc-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.calc-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
}

.calc-title i { color: var(--primary); }

/* Input Groups */
.input-group {
  margin-bottom: 18px;
}

.input-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input[type="number"],
input[type="text"],
input[type="email"],
select {
  width: 100%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 13px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -moz-appearance: textfield;
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button { -webkit-appearance: none; }

input[type="number"]:focus,
input[type="text"]:focus,
input[type="email"]:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.input-with-symbol {
  position: relative;
}

.currency-symbol {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  pointer-events: none;
}

.input-with-symbol input {
  padding-left: 32px;
}

/* Range Sliders */
.range-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

input[type="range"] {
  flex: 1;
  height: 5px;
  background: var(--border);
  border: none;
  border-radius: 100px;
  outline: none;
  cursor: pointer;
  accent-color: var(--primary);
  padding: 0;
}

.range-input-num {
  width: 70px !important;
  text-align: center;
  flex-shrink: 0;
}

.pct-sign {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Tooltip */
.tooltip-icon {
  color: var(--text-subtle);
  cursor: help;
  position: relative;
  font-size: 0.8rem;
}

.tooltip-icon:hover::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--text);
  color: var(--surface);
  font-size: 0.75rem;
  font-weight: 400;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  z-index: 50;
  pointer-events: none;
  text-transform: none;
  letter-spacing: 0;
}

/* Toggle Switches */
.toggles-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 18px;
  padding: 14px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin: 0;
}

.toggle-switch input[type="checkbox"] { display: none; }

.slider-toggle {
  width: 38px;
  height: 21px;
  background: var(--border);
  border-radius: 100px;
  position: relative;
  transition: background var(--transition);
  flex-shrink: 0;
}

.slider-toggle::after {
  content: "";
  position: absolute;
  width: 15px;
  height: 15px;
  background: #fff;
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .slider-toggle {
  background: var(--primary);
}

.toggle-switch input:checked + .slider-toggle::after {
  transform: translateX(17px);
}

.toggle-label small {
  font-size: 0.75rem;
  opacity: 0.7;
}

/* Scenario B Panel */
.scenario-b-panel {
  background: rgba(236,72,153,0.06);
  border: 1.5px solid rgba(236,72,153,0.25);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 18px;
}

.scenario-b-header {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--pink);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 7px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hidden { display: none !important; }

/* Calculate Button */
.btn-calculate {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}

.btn-calculate:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.45);
}

.btn-calculate:active { transform: translateY(0); }

/* ─── LEAD INLINE ────────────────────────────────────── */
.lead-inline {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.4s ease;
  pointer-events: none;
}

.lead-inline.lead-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.lead-inline-inner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.lead-icon { font-size: 1.5rem; color: var(--primary); margin-top: 2px; }

.lead-inline p { font-size: 0.88rem; color: var(--text); line-height: 1.5; }
.lead-sub { color: var(--text-muted); font-size: 0.82rem; }

.lead-inline-form {
  display: flex;
  gap: 8px;
}

.lead-inline-form input {
  flex: 1;
  font-size: 0.88rem;
  padding: 9px 12px;
}

.btn-lead {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 14px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}

.btn-lead:hover { background: #059669; transform: translateY(-1px); }

.lead-privacy {
  font-size: 0.73rem;
  color: var(--text-subtle);
  margin-top: 9px;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ─── RESULTS CARDS ──────────────────────────────────── */
.results-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.result-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px 18px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.result-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.result-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.result-final .result-icon { background: var(--primary-light); color: var(--primary); }
.result-interest .result-icon { background: var(--accent-light); color: var(--accent); }
.result-contrib .result-icon { background: var(--warning-light); color: var(--warning); }
.result-multiplier .result-icon { background: rgba(236,72,153,0.12); color: var(--pink); }

.result-value {
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 5px;
}

.result-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-final { border-top: 3px solid var(--primary); }
.result-interest { border-top: 3px solid var(--accent); }
.result-contrib { border-top: 3px solid var(--warning); }
.result-multiplier { border-top: 3px solid var(--pink); }

.results-visible .result-card {
  animation: popIn 0.35s cubic-bezier(0.34,1.56,0.64,1) both;
}

.results-visible .result-card:nth-child(2) { animation-delay: 0.07s; }
.results-visible .result-card:nth-child(3) { animation-delay: 0.13s; }
.results-visible .result-card:nth-child(4) { animation-delay: 0.19s; }

@keyframes popIn {
  from { opacity: 0; transform: scale(0.88) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* ─── INSIGHTS BAR ───────────────────────────────────── */
.insights-bar {
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dark-mode .insights-bar {
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(16,185,129,0.08));
}

.insight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.insight-item i { color: var(--primary); font-size: 1rem; flex-shrink: 0; }
.insight-item strong { color: var(--text); }

/* ─── CHART SECTION ──────────────────────────────────── */
.chart-section {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}

.chart-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.chart-tab {
  flex: 1;
  padding: 12px 10px;
  font-family: inherit;
  font-size: 0.83rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition);
  border-bottom: 2px solid transparent;
}

.chart-tab:hover { color: var(--primary); background: var(--surface); }
.chart-tab.active { color: var(--primary); border-bottom-color: var(--primary); background: var(--surface); }

.chart-pane { display: none; padding: 20px; }
.chart-pane.active { display: block; }

.chart-container { position: relative; }

/* Donut Chart */
.donut-wrap { max-width: 360px; margin: 0 auto; }

.donut-legend {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 8px 8px;
}

.donut-legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}

.donut-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.donut-lbl { flex: 1; color: var(--text-muted); }
.donut-val { font-weight: 700; color: var(--text); }
.donut-pct {
  background: var(--surface2);
  border-radius: 100px;
  padding: 2px 8px;
  font-size: 0.75rem;
  color: var(--text-subtle);
}

/* Year-by-Year Table */
.table-wrap {
  overflow-x: auto;
  max-height: 420px;
  overflow-y: auto;
}

.yr-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.yr-table thead {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface2);
}

.yr-table th {
  padding: 10px 14px;
  text-align: right;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

.yr-table th:first-child { text-align: left; }

.yr-table td {
  padding: 9px 14px;
  text-align: right;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}

.yr-table td:first-child { text-align: left; font-weight: 600; color: var(--text); }

.yr-table tbody tr:hover { background: var(--surface2); }

.yr-table .bold { font-weight: 700; color: var(--text); }
.yr-table .green { color: var(--accent); font-weight: 600; }
.positive { color: var(--accent) !important; font-weight: 600; }
.negative { color: var(--danger) !important; }

.milestone-row { background: rgba(99,102,241,0.04); }
.dark-mode .milestone-row { background: rgba(99,102,241,0.08); }
.milestone-row td:first-child::after { content: " ⭐"; font-size: 0.7rem; }

/* ─── CTA BUTTONS ────────────────────────────────────── */
.cta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 3px 10px rgba(99,102,241,0.3);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(99,102,241,0.4); color: #fff; text-decoration: none; }

.btn-secondary {
  background: var(--surface2);
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); text-decoration: none; }

.btn-accent {
  background: linear-gradient(135deg, var(--accent), #059669);
  color: #fff;
  box-shadow: 0 3px 10px rgba(16,185,129,0.3);
}

.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(16,185,129,0.4); color: #fff; text-decoration: none; }

/* ─── SEO CONTENT SECTION ────────────────────────────── */
.seo-content {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 64px 0;
}

.seo-inner {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

.seo-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--text);
  margin: 40px 0 14px;
  letter-spacing: -0.02em;
}

.seo-body h2:first-child { margin-top: 0; }

.seo-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 24px 0 8px;
}

.seo-body p {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.75;
}

.seo-body strong { color: var(--text); }
.seo-body em { font-style: italic; }

/* Formula Box */
.formula-box {
  background: var(--surface2);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 20px 0;
}

.formula-box code {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  color: var(--primary);
  display: block;
  margin-bottom: 14px;
  font-weight: 600;
}

.formula-legend {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.formula-legend li {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Comparison Tables */
.comparison-table-wrap,
.freq-table-wrap {
  overflow-x: auto;
  margin: 18px 0;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

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

.comparison-table th {
  background: var(--primary);
  color: #fff;
  padding: 11px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.comparison-table td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--surface);
}

.comparison-table tbody tr:hover td { background: var(--surface2); }
.highlight-green { color: var(--accent) !important; font-weight: 700; }

/* Example Cards */
.example-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.example-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.example-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.example-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.example-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 8px;
}

.example-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* ─── FAQ SECTION ────────────────────────────────────── */
.faq-section { margin-top: 40px; }

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.faq-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:has(.faq-question[aria-expanded="true"]) {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  gap: 12px;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--primary); }

.faq-question i {
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-question[aria-expanded="true"] i { transform: rotate(180deg); color: var(--primary); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.2s ease;
  padding: 0 20px;
}

.faq-answer.open {
  max-height: 300px;
  padding: 0 20px 18px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ─── FINAL CTA ──────────────────────────────────────── */
.final-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  margin-top: 48px;
  color: #fff;
}

.final-cta h2 {
  color: #fff;
  font-size: 1.6rem;
  margin: 0 0 12px;
}

.final-cta p {
  color: rgba(255,255,255,0.85);
  font-size: 1rem;
  margin-bottom: 24px;
}

.final-cta-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.final-cta .btn-primary {
  background: #fff;
  color: var(--primary-dark);
}

.final-cta .btn-primary:hover { color: var(--primary-dark); }

.final-cta .btn-accent {
  background: rgba(255,255,255,0.18);
  border: 1.5px solid rgba(255,255,255,0.4);
  color: #fff;
  box-shadow: none;
}

.final-cta .btn-accent:hover { background: rgba(255,255,255,0.28); color: #fff; }

/* ─── SEO SIDEBAR ────────────────────────────────────── */
.seo-sidebar {
  position: sticky;
  top: 80px;
}

.sticky-ad {
  position: sticky;
  top: 80px;
}

/* ─── LEAD POPUP ─────────────────────────────────────── */
.lead-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.lead-popup-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.lead-popup-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 32px;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 25px 60px rgba(0,0,0,0.25);
  position: relative;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.lead-popup-overlay.visible .lead-popup-card {
  transform: scale(1) translateY(0);
}

.popup-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.popup-close:hover { color: var(--danger); border-color: var(--danger); }

.popup-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 14px;
  text-align: center;
}

.lead-popup-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 10px;
  color: var(--text);
}

.lead-popup-card > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.6;
}

.popup-results-summary {
  background: var(--surface2);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.popup-summary-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.popup-summary-item span { font-size: 0.72rem; color: var(--text-subtle); text-transform: uppercase; letter-spacing: 0.05em; }
.popup-summary-item strong { font-size: 0.95rem; font-weight: 700; color: var(--text); }
.popup-summary-item.highlight strong { color: var(--accent); font-size: 1.05rem; }

.popup-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-lead-popup {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}

.btn-lead-popup:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.45); }

.popup-privacy {
  font-size: 0.75rem;
  color: var(--text-subtle);
  text-align: center;
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

/* ─── SHARE MODAL ────────────────────────────────────── */
.share-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.share-modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.share-modal-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  position: relative;
  transform: scale(0.92);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
}

.share-modal-overlay.visible .share-modal-card { transform: scale(1); }

.share-modal-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.share-modal-card > p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.share-link-box {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.share-link-box input {
  flex: 1;
  font-size: 0.8rem;
}

.btn-copy {
  padding: 9px 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-copy:hover { background: var(--primary-dark); }

.share-socials {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.share-social-btn {
  flex: 1;
  min-width: 110px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: #fff;
  text-decoration: none;
  transition: all var(--transition);
}

.twitter { background: #1da1f2; }
.twitter:hover { background: #0d8bd9; color: #fff; text-decoration: none; }
.facebook { background: #1877f2; }
.facebook:hover { background: #0d6ddb; color: #fff; text-decoration: none; }
.linkedin { background: #0a66c2; }
.linkedin:hover { background: #0050a0; color: #fff; text-decoration: none; }

/* ─── TOAST ──────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: var(--surface);
  padding: 12px 22px;
  border-radius: 100px;
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2000;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); }
.toast i { color: var(--accent); }

/* ─── FOOTER ─────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-brand i { color: var(--primary); font-size: 1.3rem; }
.footer-brand strong { font-size: 1.1rem; color: var(--text); }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-start;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--primary); text-decoration: none; }

.footer-disclaimer {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.footer-disclaimer p {
  font-size: 0.78rem;
  color: var(--text-subtle);
  line-height: 1.6;
  margin-bottom: 4px;
}

/* ─── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 1024px) {
  .calculator-layout {
    grid-template-columns: 360px 1fr;
    gap: 24px;
  }

  .seo-inner {
    grid-template-columns: 1fr;
  }

  .seo-sidebar { display: none; }
}

@media (max-width: 768px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .sticky-calc {
    position: static;
    max-height: none;
    overflow-y: visible;
  }

  .results-cards { grid-template-columns: repeat(2, 1fr); }

  .site-nav { display: none; }

  .hero-section { padding: 28px 0 24px; }

  h1 { font-size: 1.6rem; }

  .input-row-2 { grid-template-columns: 1fr 1fr; }

  .example-cards { grid-template-columns: 1fr; }

  .chart-tab { font-size: 0.75rem; padding: 10px 8px; }

  .cta-bar { flex-direction: column; }
  .cta-bar .btn-cta { justify-content: center; }

  .final-cta { padding: 28px 20px; }
  .final-cta h2 { font-size: 1.3rem; }

  .footer-inner { grid-template-columns: 1fr; }

  .lead-inline-form { flex-direction: column; }
  .lead-inline-form .btn-lead { width: 100%; justify-content: center; }

  .popup-results-summary { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .results-cards { grid-template-columns: 1fr; }
  .result-card { flex-direction: row; text-align: left; gap: 14px; }
  .result-icon { margin-bottom: 0; flex-shrink: 0; }
  .calc-card { padding: 20px 18px; }
  .formula-box code { font-size: 0.78rem; word-break: break-all; }
  .chart-tabs { flex-wrap: wrap; }
  .chart-tab { min-width: 33%; }
}

/* ─── SCROLLBAR STYLING ──────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 100px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-subtle); }

/* ─── SELECTION ──────────────────────────────────────── */
::selection { background: var(--primary-light); color: var(--primary-dark); }

/* ─── PRINT ──────────────────────────────────────────── */
@media print {
  .site-header, .ad-banner, .lead-inline, .lead-popup-overlay,
  .share-modal-overlay, .toast, .site-footer, .cta-bar { display: none !important; }
  .calculator-layout { grid-template-columns: 1fr; }
  body { background: #fff; color: #000; }
}

/* ─── LOADING SKELETON ANIMATION ──────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.skeleton {
  background: linear-gradient(90deg, var(--surface2) 25%, var(--border) 50%, var(--surface2) 75%);
  background-size: 200% auto;
  animation: shimmer 1.5s linear infinite;
  border-radius: 6px;
}

/* ─── SMOOTH FOCUS VISIBLE ─────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ─── SCENARIO LABEL BADGES ────────────────────────────── */
.scenario-badge-a {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.scenario-badge-b {
  display: inline-block;
  background: rgba(236,72,153,0.12);
  color: var(--pink);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ─── CALCULATOR INPUTS: FOCUS HIGHLIGHT ───────────────── */
.input-group:focus-within label {
  color: var(--primary);
}

/* ─── RESULT CARDS HIGH-VALUE GLOW ─────────────────────── */
.result-final:hover {
  box-shadow: 0 8px 30px rgba(99,102,241,0.2);
}

.result-interest:hover {
  box-shadow: 0 8px 30px rgba(16,185,129,0.2);
}

/* ─── MOBILE NAV HAMBURGER (future use) ────────────────── */
.mobile-nav-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.3rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-nav-btn { display: block; }
}

/* ─── CHART CONTAINER RESPONSIVE FIX ──────────────────── */
@media (max-width: 480px) {
  .chart-container { height: 260px !important; }
  .donut-wrap { height: 260px !important; max-width: 100%; }
  .chart-pane { padding: 14px 12px; }
}

/* ─── INSIGHTS BAR MOBILE ──────────────────────────────── */
@media (max-width: 480px) {
  .insights-bar { padding: 12px 14px; }
  .insight-item { font-size: 0.82rem; }
}

/* ─── COMPARE BADGE IN CHART LEGEND ───────────────────── */
.compare-active .chart-tab[data-tab="growth"]::after {
  content: " ✦";
  color: var(--pink);
  font-size: 0.7rem;
}