/* ──────────────────────────────────────────────
   WealthPath Group – Design System
   Light + Dark Mode | Compact + Professional
   ────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F2F2F7;
  --bg-tertiary: #E5E5EA;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-solid: #FFFFFF;
  --bg-input: #F2F2F7;
  --bg-hover: #E5E5EA;
  --text-primary: #1C1C1E;
  --text-secondary: #636366;
  --text-tertiary: #AEAEB2;
  --text-inverse: #FFFFFF;
  --accent: #0e7490;
  --accent-light: #E0F2F7;
  --accent-hover: #0c6478;
  --success: #34C759;
  --success-bg: #E8F9EE;
  --warning: #FF9500;
  --warning-bg: #FFF4E5;
  --danger: #FF3B30;
  --danger-bg: #FFEBEA;
  --info: #007AFF;
  --info-bg: #E5F1FF;
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --glass: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.5);
  --blur: 20px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro', sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --chart-1: #0e7490;
  --chart-2: #10B981;
  --chart-3: #F59E0B;
}

[data-theme="dark"] {
  /* ── iOS-Inspired Dark Palette ── */
  --bg-primary: #000000;
  --bg-secondary: #1C1C1E;
  --bg-tertiary: #2C2C2E;
  --bg-card: rgba(28, 28, 30, 0.80);
  --bg-card-solid: #1C1C1E;
  --bg-input: #2C2C2E;
  --bg-hover: #3A3A3C;
  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-tertiary: #636366;
  --accent: #22D3EE;
  --accent-light: rgba(34, 211, 238, 0.15);
  --accent-hover: #67E8F9;
  --success: #30D158;
  --success-bg: rgba(48, 209, 88, 0.12);
  --warning: #FF9F0A;
  --warning-bg: rgba(255, 159, 10, 0.12);
  --danger: #FF453A;
  --danger-bg: rgba(255, 69, 58, 0.12);
  --info: #64D2FF;
  --info-bg: rgba(100, 210, 255, 0.12);
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.55);
  --glass: rgba(28, 28, 30, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
  --chart-1: #22D3EE;
  --chart-2: #30D158;
  --chart-3: #FF9F0A;

  /* iOS gradient tokens for dark mode */
  --gradient-accent: linear-gradient(135deg, #0e7490 0%, #22D3EE 100%);
  --gradient-vibrant: linear-gradient(135deg, #5E5CE6 0%, #BF5AF2 50%, #FF375F 100%);
  --gradient-success: linear-gradient(135deg, #30D158 0%, #63E6BE 100%);
  --gradient-warm: linear-gradient(135deg, #FF9F0A 0%, #FF375F 100%);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.45;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  font-size: 13px;
}

/* ── Header ── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass);
  backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-img {
  max-height: 32px;
  width: auto;
  display: block;
}

[data-theme="dark"] .logo-img {
  filter: brightness(1.4);
}

/* ── Theme Toggle ── */
.theme-toggle {
  position: relative;
  width: 48px;
  height: 26px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border);
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
}

.theme-toggle.dark::after {
  transform: translateX(22px);
  background: #1C1C1E;
}

.theme-toggle .toggle-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  z-index: 1;
}

.theme-toggle .sun {
  left: 5px;
}

.theme-toggle .moon {
  right: 5px;
}

/* ── Header Actions ── */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.back-link {
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.back-link:hover {
  background: var(--accent-light);
}

.back-link-short { display: none; }

@media (max-width: 640px) {
  .back-link-full { display: none; }
  .back-link-short { display: inline; }
}

/* ── Currency Selector ── */
.currency-select {
  padding: 5px 10px;
  border-radius: 6px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  cursor: pointer;
  outline: none;
  transition: var(--transition);
}

.currency-select:focus {
  border-color: var(--accent);
}

/* ── Currency Banner ── */
.currency-banner {
  background: var(--accent-light);
  color: var(--accent);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Container ── */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px;
}

.section {
  margin-bottom: 16px;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}

.section-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: -6px;
  margin-bottom: 12px;
}

/* ── Hero Panel ── */
.hero-panel {
  background: linear-gradient(135deg, rgba(14, 116, 144, 0.06) 0%, rgba(14, 116, 144, 0.03) 100%);
  border: 1px solid rgba(14, 116, 144, 0.12);
  border-radius: var(--radius-md);
  padding: 20px 24px 16px;
  margin-bottom: 16px;
}

[data-theme="dark"] .hero-panel {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.10) 0%, rgba(34, 211, 238, 0.05) 50%, rgba(34, 211, 238, 0.03) 100%);
  border-color: rgba(34, 211, 238, 0.18);
}

.hero-panel .section-title {
  font-size: 22px;
  margin-bottom: 4px;
}

.hero-tagline {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.hero-description {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  max-width: 680px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

@media (max-width: 900px) {
  .hero-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

.hero-feature {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.hero-feature-icon {
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 1px;
}

.hero-feature strong {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1px;
}

.hero-feature span {
  font-size: 10px;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
}

.card-badge {
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--accent-light);
  color: var(--accent);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

/* ── Investment Tabs ── */
.inv-tabs {
  display: flex;
  gap: 4px;
  padding: 3px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  width: fit-content;
}

.inv-tab {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: transparent;
  color: var(--text-secondary);
}

.inv-tab.active {
  background: var(--bg-card-solid);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.add-inv-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  border: 1px dashed var(--border-strong);
  background: transparent;
  color: var(--text-secondary);
  transition: var(--transition);
}

.add-inv-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Forms (COMPACT) ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.form-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.form-input,
.form-select {
  padding: 6px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(14, 116, 144, 0.12);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus {
  border-color: #22D3EE;
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.20);
}

.form-hint {
  font-size: 9px;
  color: var(--text-tertiary);
}

/* ── Advanced Toggle ── */
.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin: 10px 0;
  width: fit-content;
}

.advanced-toggle:hover {
  background: var(--accent);
  color: white;
}

.advanced-toggle .arrow {
  transition: transform 0.3s ease;
  font-size: 9px;
}

.advanced-toggle.open .arrow {
  transform: rotate(180deg);
}

.advanced-section {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease;
}

.advanced-section.open {
  max-height: 3000px;
}

.advanced-group {
  margin-bottom: 12px;
}

.advanced-group-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Buttons ── */
.btn {
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #164e63);
  color: white;
  box-shadow: 0 3px 10px rgba(14, 116, 144, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 5px 14px rgba(14, 116, 144, 0.4);
}

[data-theme="dark"] .btn-primary {
  background: var(--gradient-accent);
  box-shadow: 0 3px 14px rgba(34, 211, 238, 0.35);
}

[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 5px 20px rgba(34, 211, 238, 0.5);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  box-shadow: 0 3px 10px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
  transform: translateY(-1px);
}

[data-theme="dark"] .btn-success {
  background: var(--gradient-success);
  box-shadow: 0 3px 14px rgba(48, 209, 88, 0.3);
}

[data-theme="dark"] .btn-success:hover {
  box-shadow: 0 5px 20px rgba(48, 209, 88, 0.45);
}

.btn-group {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

/* ── Sensitivity Magnitude Buttons ── */
.sens-magnitude-group {
  display: flex;
  gap: 4px;
}

.sens-mag-btn {
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.sens-mag-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.sens-mag-btn:hover:not(.active) {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── KPI Table Format ── */
.kpi-table-section {
  margin-bottom: 16px;
}

.kpi-table-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding: 0 4px;
}

.kpi-table-icon {
  font-size: 16px;
}

.kpi-table-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.kpi-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  table-layout: fixed;
}

.kpi-row {
  transition: background 0.2s ease;
}

.kpi-row:hover {
  background: var(--bg-hover);
}

.kpi-table th {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  padding: 6px 10px;
  border-bottom: 2px solid var(--border);
}

.kpi-table th:first-child {
  width: 28px;
}

.kpi-table th:nth-child(2) {
  width: auto;
  text-align: left;
}

.kpi-table th:nth-child(n+3) {
  text-align: right;
  width: 140px;
}

.kpi-inv-header {
  text-align: right !important;
}

.kpi-row td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.kpi-row:last-of-type td {
  border-bottom: none;
}

.kpi-icon-cell {
  width: 28px;
  text-align: center;
  font-size: 14px;
}

.kpi-name-cell {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.kpi-val-cell {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: right;
}

.kpi-info-btn {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: none;
  cursor: pointer;
  font-size: 10px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 4px;
  vertical-align: middle;
}

.kpi-info-btn:hover {
  background: var(--accent);
}

.kpi-info-row td {
  padding: 0 !important;
  border-bottom: 1px solid var(--border);
}

.kpi-info-box {
  padding: 10px 14px;
  margin: 0 10px 8px 42px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}

.kpi-info-text {
  font-size: 12px;
  color: var(--text-primary);
  line-height: 1.5;
}

.kpi-info-example {
  font-size: 11px;
  color: var(--accent);
  margin-top: 4px;
  font-style: italic;
}

/* ── Comparison Table ── */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  table-layout: fixed;
}

.comparison-table th {
  background: var(--accent);
  color: white;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
}

[data-theme="dark"] .comparison-table th {
  background: linear-gradient(135deg, #0e7490, #22D3EE);
}

.comparison-table th:first-child {
  text-align: left;
  width: auto;
}

.comparison-table th:nth-child(n+2) {
  text-align: right;
  width: 140px;
}

.comparison-table td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}

.comparison-table tr:nth-child(even) td {
  background: var(--bg-secondary);
}

.comp-metric {
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
}

.comp-val {
  font-weight: 700;
  color: var(--text-primary);
  text-align: right;
}

/* ── Charts ── */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  overflow: hidden;
  flex: 1 1 300px;
  min-width: 0;
}

.charts-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.charts-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.charts-row>.chart-container {
  flex: 1 1 300px;
}

/* ── Sensitivity Table ── */
.sens-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.sens-table th,
.sens-table td {
  padding: 6px 10px;
  text-align: left;
  font-size: 12px;
}

.sens-table th {
  background: var(--accent);
  color: white;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

[data-theme="dark"] .sens-table th {
  background: linear-gradient(135deg, #0e7490, #22D3EE);
}

.sens-table td {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.sens-table tr:nth-child(even) td {
  background: var(--bg-secondary);
}

.sens-low {
  color: var(--danger);
  font-weight: 600;
}

.sens-high {
  color: var(--success);
  font-weight: 600;
}

/* ── Monte Carlo ── */
.mc-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.mc-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  text-align: center;
}

.mc-stat-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.mc-stat-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin-top: 2px;
}

/* ── Result Tabs ── */
.result-inv-tabs {
  display: flex;
  gap: 4px;
  padding: 3px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  width: fit-content;
}

.result-inv-tab {
  padding: 5px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: transparent;
  color: var(--text-secondary);
}

.result-inv-tab.active {
  background: var(--bg-card-solid);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

/* ── Interpretation ── */
.interp-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
}

.interp-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}

.interp-badge.conservative {
  background: var(--success-bg);
  color: var(--success);
}

.interp-badge.moderate {
  background: var(--warning-bg);
  color: var(--warning);
}

.interp-badge.aggressive {
  background: var(--danger-bg);
  color: var(--danger);
}

.interp-section {
  margin-bottom: 10px;
}

.interp-section-title {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
}

.interp-text {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.interp-list {
  list-style: none;
  padding: 0;
}

.interp-list li {
  font-size: 12px;
  color: var(--text-secondary);
  padding: 2px 0;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.interp-list li::before {
  content: '•';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ── Inv Panels ── */
.inv-panel {
  display: none;
}

.inv-panel.active {
  display: block;
  animation: fadeInUp 0.3s ease;
}

/* ── Disclaimer ── */
.disclaimer {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: 16px;
}

.disclaimer-text {
  font-size: 10px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* ── Loading ── */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-card {
  background: var(--bg-card-solid);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
}

.loading-text {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Results ── */
#results-section {
  display: none;
}

#results-section.show {
  display: block;
  animation: fadeInUp 0.4s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Toggle Switch ── */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid var(--border);
  outline: none;
}

.toggle-switch:checked {
  background: var(--accent);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
}

.toggle-switch:checked::after {
  left: 20px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }

  .form-grid {
    grid-template-columns: 1fr 1fr;
  }

  .charts-grid {
    grid-template-columns: 1fr;
  }

  /* ── Mobile Table Scroll with Frozen First Column ── */
  .kpi-table-section,
  .table-scroll-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -4px;
    padding: 0 4px;
  }

  .kpi-table,
  .comparison-table,
  .sens-table {
    min-width: 600px;
  }

  /* Freeze first column — KPI tables (icon col + metric name col) */
  .kpi-table th:first-child,
  .kpi-table td.kpi-icon-cell {
    position: sticky;
    left: 0;
    z-index: 2;
    background: var(--bg-card-solid);
  }

  .kpi-table th:nth-child(2),
  .kpi-table td.kpi-name-cell {
    position: sticky;
    left: 28px;
    z-index: 2;
    background: var(--bg-card-solid);
    border-right: 2px solid var(--border);
  }

  .kpi-table th:first-child {
    background: var(--bg-tertiary);
  }

  .kpi-table th:nth-child(2) {
    background: var(--bg-tertiary);
  }

  /* Freeze first column — Comparison table */
  .comparison-table th:first-child,
  .comparison-table td.comp-metric {
    position: sticky;
    left: 0;
    z-index: 2;
    background: var(--bg-card-solid);
    border-right: 2px solid var(--border);
  }

  .comparison-table th:first-child {
    background: var(--accent);
    z-index: 3;
  }

  /* Freeze first column — Sensitivity table */
  .sens-table th:first-child,
  .sens-table td:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    background: var(--bg-card-solid);
    border-right: 2px solid var(--border);
  }

  .sens-table th:first-child {
    background: var(--accent);
    z-index: 3;
  }

  .sens-table tr:nth-child(even) td:first-child {
    background: var(--bg-secondary);
  }

  /* Scrollbar hint for mobile */
  .kpi-table-section::after,
  .table-scroll-wrapper::after {
    content: '';
    display: block;
    height: 0;
  }

  .hero-features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero-features {
    grid-template-columns: 1fr;
  }
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

/* ── iOS Dark Mode Enhancements ── */
[data-theme="dark"] .card {
  border-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .card:hover {
  border-color: rgba(34, 211, 238, 0.15);
}

[data-theme="dark"] .kpi-table {
  border-color: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .mc-stat-value {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] .advanced-toggle {
  background: rgba(34, 211, 238, 0.12);
  color: #22D3EE;
  border-color: rgba(34, 211, 238, 0.3);
}

[data-theme="dark"] .advanced-toggle:hover {
  background: #22D3EE;
  color: white;
}

[data-theme="dark"] .sens-mag-btn.active {
  background: linear-gradient(135deg, #0e7490, #22D3EE);
  border-color: transparent;
  box-shadow: 0 2px 8px rgba(34, 211, 238, 0.35);
}

[data-theme="dark"] .theme-toggle {
  background: #3A3A3C;
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .inv-tab.active {
  color: #22D3EE;
}

[data-theme="dark"] .result-inv-tab.active {
  color: #22D3EE;
}

[data-theme="dark"] .interp-list li::before {
  color: #22D3EE;
}

[data-theme="dark"] .loading-spinner {
  border-top-color: #22D3EE;
}

[data-theme="dark"] .currency-banner {
  background: rgba(34, 211, 238, 0.10);
  color: #67E8F9;
  border: 1px solid rgba(34, 211, 238, 0.15);
}

[data-theme="dark"] .badge-primary {
  background: rgba(34, 211, 238, 0.15);
  color: #67E8F9;
}

[data-theme="dark"] .kpi-info-box {
  background: rgba(34, 211, 238, 0.08);
  border-left-color: #22D3EE;
}

[data-theme="dark"] .kpi-info-example {
  color: #67E8F9;
}

[data-theme="dark"] .hero-tagline {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

[data-theme="dark"] body {
  background: #000000;
}