/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  /* Material Design 3 Custom Colors (Dark Theme Theme Palette) */
  --bg-primary: #0b0f19;
  --bg-surface: #151c2c;
  --bg-surface-variant: #1e2638;
  --color-primary: #00e5ff;
  --color-primary-rgb: 0, 229, 255;
  --color-secondary: #00e676;
  --color-accent: #ff3d00;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-disabled: #64748b;
  --border-color: #27314a;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.3);
  --bg-header: rgba(11, 15, 25, 0.8);
}

body.light-theme, .light-theme {
  --bg-primary: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-surface-variant: #e2e8f0;
  --color-primary: #00838f;
  --color-secondary: #2e7d32;
  --color-accent: #c62828;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-disabled: #94a3b8;
  --border-color: #cbd5e1;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
  --bg-header: rgba(241, 245, 249, 0.8);
}

.light-theme .hero h2 {
  background: linear-gradient(to right, #0f172a, #334155);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

body {
  font-family: 'Outfit', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-variant);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #0b0f19;
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
}

.logo-text h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 30px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #0b0f19;
  box-shadow: 0 4px 15px rgba(0, 229, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 229, 255, 0.4);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--bg-surface-variant);
  border-color: var(--text-secondary);
}

/* Hero Section */
.hero {
  max-width: 1200px;
  margin: 40px auto 20px;
  padding: 0 24px;
  text-align: center;
}

.hero h2 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 12px;
  background: linear-gradient(to right, #ffffff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 600px;
  margin: 0 auto 24px;
}

.trust-badge-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.trust-badge-row .badge-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: 40px;
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.trust-badge-row .badge-icon {
  font-size: 24px;
  display: flex;
  align-items: center;
}

.trust-badge-row .badge-title {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.trust-badge-row .badge-subtitle {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
}

/* Tabs System */
.tabs-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.tabs-header {
  display: flex;
  background-color: var(--bg-surface);
  padding: 6px;
  border-radius: 40px;
  border: 1px solid var(--border-color);
  margin-bottom: 30px;
  justify-content: space-around;
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  border-radius: 30px;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.tab-btn i {
  font-size: 18px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background-color: var(--bg-surface-variant);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

/* Calculator Card Grid */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 60px;
  align-items: start;
}

@media (max-width: 900px) {
  .calculator-grid {
    grid-template-columns: 1fr;
  }
  .hero h2 {
    font-size: 32px;
  }
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

.card:hover {
  border-color: rgba(0, 229, 255, 0.3);
}

/* Slider Controls */
.slider-group {
  margin-bottom: 24px;
}

.slider-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.slider-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.slider-val-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-surface-variant);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  gap: 4px;
}

.slider-val-box input {
  background: transparent;
  border: none;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  width: 70px;
  text-align: right;
  outline: none;
}

.slider-val-box span {
  color: var(--text-secondary);
  font-size: 14px;
}

.input-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-surface-variant);
  outline: none;
  margin: 12px 0;
}

.input-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
  transition: var(--transition-smooth);
}

.input-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Summary Grid on Results Panel */
.results-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
  height: 100%;
}

.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.metric-card {
  background-color: var(--bg-surface-variant);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.metric-title {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.metric-value {
  font-size: 20px;
  font-weight: 700;
}

.metric-value.highlight-primary {
  color: var(--color-primary);
}

.metric-value.highlight-secondary {
  color: var(--color-secondary);
}

.metric-value.highlight-accent {
  color: var(--color-accent);
}

.chart-wrapper {
  position: relative;
  width: 240px;
  height: 240px;
  margin: 0 auto;
}

/* Features/Promo section */
.promo-section {
  max-width: 1200px;
  margin: 40px auto 80px;
  padding: 0 24px;
}

.section-title {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 40px;
}

.promo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.promo-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition-smooth);
}

.promo-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.3);
}

.promo-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--bg-surface-variant);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 16px;
}

.promo-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.promo-card p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Footer Section */
footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 40px 24px;
  text-align: center;
}

.footer-content {
  max-width: 600px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 16px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.footer-link:hover {
  color: var(--color-primary);
}

/* Legal/Modal Styling */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(11, 15, 25, 0.9);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 700px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.modal-close:hover {
  color: var(--color-primary);
}

.modal h2 {
  margin-bottom: 16px;
  font-size: 24px;
  font-weight: 700;
}

.modal-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.modal-body h3 {
  color: var(--text-primary);
  margin: 20px 0 8px;
}

.modal-body p {
  margin-bottom: 12px;
}

/* Additional Mobile & Tablet Optimizations */
@media (max-width: 600px) {
  .hero h2 {
    font-size: 28px;
    line-height: 1.3;
  }
  .hero p {
    font-size: 14px;
    margin-bottom: 16px;
  }
  .card {
    padding: 20px 16px;
    border-radius: var(--radius-md);
  }
  .metric-value {
    font-size: 18px;
  }
  .metric-value.highlight-secondary, 
  .metric-value.highlight-accent {
    font-size: 22px !important;
  }
  .tabs-header {
    flex-direction: column;
    border-radius: var(--radius-md);
    gap: 8px;
    padding: 8px;
  }
  .tab-btn {
    width: 100%;
    padding: 10px;
    font-size: 14px;
  }
  .trust-badge-row {
    gap: 12px;
  }
  .trust-badge-row .badge-item {
    width: 100%;
    justify-content: center;
  }
  header {
    padding: 12px 16px;
  }
  .logo-text h1 {
    font-size: 16px;
  }
  .logo-text p {
    font-size: 9px;
  }
  .btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  .chart-wrapper {
    width: 200px;
    height: 200px;
  }
}