:root {
  /* Color system - Dark theme default */
  --bg-color: #090d16;
  --card-bg: rgba(17, 24, 39, 0.75);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --primary-color: #10b981; /* emerald teal */
  --primary-glow: rgba(16, 185, 129, 0.18);
  --secondary-color: #6366f1; /* indigo */
  --secondary-glow: rgba(99, 102, 241, 0.18);
  --accent-color: #f43f5e; /* rose red for interest */
  --accent-glow: rgba(244, 63, 94, 0.18);
  --bg-orb-1: rgba(16, 185, 129, 0.12);
  --bg-orb-2: rgba(99, 102, 241, 0.15);
  
  --input-bg: #1f2937;
  --input-border: #374151;
  --input-focus: #10b981;
  --table-border: rgba(255, 255, 255, 0.05);
  --table-header-bg: rgba(17, 24, 39, 0.9);
  --table-row-hover: rgba(255, 255, 255, 0.02);
  --btn-secondary-bg: #1f2937;
  --btn-secondary-text: #f3f4f6;
  --verdict-bg: rgba(16, 185, 129, 0.1);
  --verdict-border: rgba(16, 185, 129, 0.2);

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 12px;
}

/* Light Theme overrides */
:root.light-theme {
  --bg-color: #f3f4f6;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(0, 0, 0, 0.06);
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --primary-color: #059669;
  --primary-glow: rgba(5, 150, 105, 0.08);
  --secondary-color: #4f46e5;
  --secondary-glow: rgba(79, 70, 229, 0.08);
  --accent-color: #e11d48;
  --accent-glow: rgba(225, 29, 72, 0.08);
  --bg-orb-1: rgba(5, 150, 105, 0.08);
  --bg-orb-2: rgba(79, 70, 229, 0.1);

  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --input-focus: #059669;
  --table-border: rgba(0, 0, 0, 0.05);
  --table-header-bg: rgba(249, 250, 251, 0.95);
  --table-row-hover: rgba(0, 0, 0, 0.01);
  --btn-secondary-bg: #e5e7eb;
  --btn-secondary-text: #1f2937;
  --verdict-bg: rgba(5, 150, 105, 0.06);
  --verdict-border: rgba(5, 150, 105, 0.15);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.08);
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-color);
  overflow-x: hidden;
  line-height: 1.5;
}

/* Background blur orbs */
.bg-orb {
  position: fixed;
  width: 45vw;
  height: 45vw;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

.orb-1 {
  background-color: var(--bg-orb-1);
  top: -10%;
  left: -10%;
  animation: float-orb 12s ease-in-out infinite alternate;
}

.orb-2 {
  background-color: var(--bg-orb-2);
  bottom: -15%;
  right: -10%;
  animation: float-orb-reverse 15s ease-in-out infinite alternate;
}

@keyframes float-orb {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.1); }
}

@keyframes float-orb-reverse {
  0% { transform: translate(0, 0) scale(1.1); }
  100% { transform: translate(-30px, -40px) scale(0.9); }
}

/* Header */
.header {
  padding: 24px 0;
  border-bottom: 1px solid var(--card-border);
  backdrop-filter: blur(10px);
  background-color: rgba(9, 13, 22, 0.3);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  width: min(1100px, 92vw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
}

.logo-eyebrow {
  font-size: 0.75rem;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  display: block;
}

.logo h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.theme-toggle-btn {
  background: var(--btn-secondary-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.theme-toggle-btn:hover {
  transform: scale(1.05);
}

.sun-icon { display: none; }
.moon-icon { display: block; font-size: 1.2rem; }

:root.light-theme .sun-icon { display: block; font-size: 1.2rem; }
:root.light-theme .moon-icon { display: none; }

/* Main Container */
.container {
  width: min(1100px, 92vw);
  margin: 40px auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Tab Navigation */
.tabs-nav {
  display: flex;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-sm);
  padding: 6px;
  gap: 4px;
  width: fit-content;
  box-shadow: var(--shadow-sm);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background-color: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  color: var(--text-primary);
  background-color: var(--input-bg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  font-weight: 600;
}

/* Tab Panels */
.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Cards (Glassmorphism) */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Grid Layouts */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

/* Input Fields & Groups */
.input-group {
  margin-bottom: 28px;
}

.input-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.input-header label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.input-wrapper-text {
  display: flex;
  align-items: center;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-sm);
  padding: 6px 12px;
  position: relative;
  min-width: 140px;
}

.input-wrapper-text input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  width: 100%;
  text-align: right;
  outline: none;
}

/* Remove default spin buttons */
.input-wrapper-text input[type=number]::-webkit-inner-spin-button, 
.input-wrapper-text input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}
.input-wrapper-text input[type=number] {
  -moz-appearance: textfield;
}

.currency-prefix {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-right: 4px;
}

.unit-suffix {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-left: 6px;
}

/* Range Sliders */
.slider-wrapper {
  position: relative;
}

.slider-wrapper input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--input-border);
  outline: none;
  cursor: pointer;
}

/* Slider Thumbs */
.slider-wrapper input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-color);
  box-shadow: 0 0 10px var(--primary-glow);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.slider-wrapper input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.slider-wrapper input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: var(--primary-color);
  box-shadow: 0 0 10px var(--primary-glow);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.slider-wrapper input[type="range"]::-moz-range-thumb:hover {
  transform: scale(1.2);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Toggle Buttons */
.tenure-toggle-container {
  display: flex;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-sm);
  padding: 3px;
  margin-right: auto;
  margin-left: 12px;
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.toggle-btn.active {
  background-color: var(--primary-color);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

/* Results Layout */
.results-layout {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.results-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.result-tile {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-val {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.highlight-teal { color: var(--primary-color); text-shadow: 0 0 15px var(--primary-glow); }
.highlight-rose { color: var(--accent-color); text-shadow: 0 0 15px var(--accent-glow); }
.highlight-indigo { color: var(--secondary-color); text-shadow: 0 0 15px var(--secondary-glow); }

/* SVG Donut Chart */
.chart-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 20px;
  padding: 10px 0;
}

.donut-chart {
  transform: rotate(-90deg);
  max-width: 170px;
  max-height: 170px;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.15));
}

.donut-ring {
  stroke: rgba(255, 255, 255, 0.04);
}

:root.light-theme .donut-ring {
  stroke: rgba(0, 0, 0, 0.04);
}

.donut-segment {
  transition: stroke-dashoffset 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.principal-segment {
  stroke: var(--primary-color);
}

.interest-segment {
  stroke: var(--accent-color);
}

.chart-center-label {
  fill: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  text-anchor: middle;
  transform: rotate(90deg);
  transform-origin: center;
}

.chart-center-val {
  fill: var(--text-primary);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  text-anchor: middle;
  transform: rotate(90deg);
  transform-origin: center;
}

.chart-legend {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.bullet {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.principal-bullet { background-color: var(--primary-color); }
.interest-bullet { background-color: var(--accent-color); }

/* Repayment Schedule Tab Styles */
.table-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.table-header-row h3 {
  margin-bottom: 0;
}

.table-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.schedule-view-toggle {
  display: flex;
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-sm);
  padding: 3px;
}

.table-container {
  overflow-x: auto;
  max-height: 480px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--table-border);
}

/* Custom Scrollbar for Table Container */
.table-container::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.table-container::-webkit-scrollbar-track {
  background: var(--card-bg);
}

.table-container::-webkit-scrollbar-thumb {
  background: var(--input-border);
  border-radius: 4px;
}

.table-container::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th {
  background-color: var(--table-header-bg);
  color: var(--text-primary);
  font-weight: 600;
  padding: 14px 18px;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 2px solid var(--table-border);
}

td {
  padding: 12px 18px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--table-border);
}

tr:hover td {
  background-color: var(--table-row-hover);
  color: var(--text-primary);
}

/* Compare Tab Styles */
.compare-container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.compare-inputs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.compare-badge {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  border-bottom-left-radius: 12px;
  color: #fff;
}

.badge-a { background-color: var(--primary-color); }
.badge-b { background-color: var(--secondary-color); }

.compare-inputs-grid .form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 8px;
}

.compare-inputs-grid label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.compare-inputs-grid input {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--border-radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  outline: none;
}

.compare-inputs-grid input:focus {
  border-color: var(--primary-color);
}

.highlight-val {
  font-weight: 600;
}

.savings-label {
  color: var(--primary-color);
  background-color: var(--primary-glow);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-left: 8px;
}

.loss-label {
  color: var(--accent-color);
  background-color: var(--accent-glow);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-left: 8px;
}

.comparison-verdict-box {
  margin-top: 24px;
  background-color: var(--verdict-bg);
  border: 1px solid var(--verdict-border);
  border-radius: var(--border-radius-sm);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.verdict-icon {
  font-size: 1.8rem;
}

.verdict-text {
  font-size: 0.95rem;
  font-weight: 500;
}

/* Secondary Button (Export) */
.secondary-btn {
  background-color: var(--btn-secondary-bg);
  border: 1px solid var(--card-border);
  color: var(--btn-secondary-text);
  padding: 10px 16px;
  border-radius: var(--border-radius-sm);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.secondary-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

:root.light-theme .secondary-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.btn-icon {
  font-size: 1rem;
}

/* Built for Digital Heroes CTA */
.cta-wrap {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}

.dh-btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--border-radius-md);
  background: linear-gradient(135deg, #111827, #030712);
  color: #ffffff;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
              box-shadow 0.3s ease, border-color 0.3s ease;
}

.dh-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 15px rgba(16, 185, 129, 0.1);
  border-color: var(--primary-color);
  background: linear-gradient(135deg, #1f2937, #111827);
}

/* Footer styling */
.footer {
  margin-top: 60px;
  border-top: 1px solid var(--card-border);
  padding: 30px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-content {
  width: min(1100px, 92vw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.creator-details p, .contact-info p {
  margin-bottom: 6px;
}

.creator-details p:last-child, .contact-info p:last-child {
  margin-bottom: 0;
}

.contact-info a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.contact-info a:hover {
  text-decoration: underline;
}

/* Animations and Reveal effects */
.reveal {
  animation: reveal-up 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.reveal-delay {
  opacity: 0;
  animation: reveal-up 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.15s forwards;
}

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .compare-inputs-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  
  .theme-toggle-btn {
    position: absolute;
    top: 24px;
    right: 4vw;
  }
  
  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .tabs-nav {
    width: 100%;
    overflow-x: auto;
  }

  .tab-btn {
    flex: 1;
    justify-content: center;
    padding: 8px 12px;
    font-size: 0.85rem;
  }

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

  .table-header-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .table-controls {
    width: 100%;
    justify-content: space-between;
  }
}