:root {
  --bg-dark: #070908;
  --bg-panel: #0d120f;
  --bg-card: #131b17;
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  
  --text-bright: #f3f4f6;
  --text-muted: #8d9590;
  --text-dark: #515c56;
  
  --accent-emerald: #10b981;
  --accent-emerald-dim: rgba(16, 185, 129, 0.1);
  --accent-emerald-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  
  --accent-cyan: #06b6d4;
  --accent-cyan-dim: rgba(6, 182, 212, 0.1);
  
  /* Chart segment colors */
  --color-pi: #10b981;
  --color-tax: #3b82f6;
  --color-ins: #8b5cf6;
  --color-pmi: #f59e0b;
  --color-hoa: #ec4899;

  --color-healthy: #10b981;
  --color-moderate: #f59e0b;
  --color-high: #ef4444;
  
  --font-sans: 'Outfit', sans-serif;
  --font-display: 'Space Grotesk', sans-serif;
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    linear-gradient(rgba(6, 8, 11, 0.85), rgba(6, 8, 11, 0.85)),
    url('../assets/cyber_calc_bg.jpg');
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  color: var(--text-bright);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Atmospheric glow */
.glow-bg {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

/* Header */
.header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.btn-back {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.9rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.btn-back:hover {
  color: var(--text-bright);
  border-color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
}

.header h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.btn-rates-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--accent-emerald);
  border-radius: 0.5rem;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
}

.btn-rates-toggle:hover {
  border-color: var(--accent-emerald);
  background: var(--accent-emerald-dim);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 900px) {
  .calculator-grid {
    grid-template-columns: 380px 1fr;
    align-items: start;
  }
}

/* Panels */
.inputs-panel,
.results-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.75rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
}

.panel-card:hover {
  border-color: var(--border-hover);
}

.panel-card h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-bright);
  border-left: 3px solid var(--accent-emerald);
  padding-left: 0.5rem;
  letter-spacing: -0.01em;
}

/* Form inputs */
.input-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.input-group:last-child {
  margin-bottom: 0;
}

.grid-2-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-with-prefix,
.input-with-suffix {
  position: relative;
  display: flex;
  align-items: center;
}

.prefix,
.suffix {
  position: absolute;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  pointer-events: none;
}

.prefix {
  left: 0.9rem;
}

.suffix {
  right: 0.9rem;
}

.input-with-prefix input {
  padding-left: 2.25rem !important;
}

.input-with-suffix input {
  padding-right: 2.25rem !important;
}

input[type="number"] {
  width: 100%;
  padding: 0.65rem 0.9rem;
  background-color: rgba(7, 9, 8, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 0.4rem;
  color: var(--text-bright);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.2s ease;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"]:focus {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.15);
}

.dual-input {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0.75rem;
}

/* Slider styling */
.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border-color);
  outline: none;
  margin-top: 0.5rem;
  transition: background 0.3s ease;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-emerald);
  cursor: pointer;
  transition: transform 0.1s ease, background-color 0.2s ease;
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: #34d399;
}

.help-text {
  font-size: 0.675rem;
  color: var(--text-dark);
}

/* Right Panel comparisons */
.term-cards-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .term-cards-container {
    grid-template-columns: 1fr 1fr;
  }
}

.term-card {
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.75rem;
  cursor: pointer;
  position: relative;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.term-card:hover {
  border-color: rgba(16, 185, 129, 0.25);
  transform: translateY(-2px);
}

.term-card.selected {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15), 0 4px 15px rgba(0, 0, 0, 0.25);
  background: var(--bg-card);
}

.term-badge {
  position: absolute;
  top: 1.75rem;
  right: 1.75rem;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.save-badge {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.term-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.term-card.selected h3 {
  color: var(--text-bright);
}

.payment-value {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.term-card.selected .payment-value {
  color: var(--accent-emerald);
}

.payment-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-dark);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.card-details {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.interest-total {
  font-weight: 600;
  color: var(--text-bright);
}

.savings-subtext {
  font-size: 0.725rem;
  color: var(--accent-emerald);
  font-weight: 500;
  display: block;
  text-align: right;
  margin-top: 0.15rem;
}

.detail-row.time-saved-row {
  border-top: 1px dashed var(--border-color);
  padding-top: 0.4rem;
  margin-top: 0.2rem;
  color: var(--accent-emerald);
  font-weight: 600;
}

.time-saved-val {
  color: var(--accent-emerald);
}

/* Donut Chart panel */
.chart-card {
  display: flex;
  flex-direction: column;
}

.chart-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  margin-top: 0.5rem;
}

@media (min-width: 600px) {
  .chart-container {
    flex-direction: row;
    justify-content: space-around;
  }
}

.svg-wrapper {
  position: relative;
  width: 200px;
  height: 200px;
}

.donut-chart {
  transform: rotate(-90deg); /* Start clockwise from top */
}

.donut-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.015);
  stroke-width: 14;
}

.donut-segment {
  fill: none;
  stroke-width: 14;
  stroke-linecap: round;
  transition: stroke-dasharray 0.35s ease, stroke-dashoffset 0.35s ease;
}

.donut-segment.pi { stroke: var(--color-pi); }
.donut-segment.tax { stroke: var(--color-tax); }
.donut-segment.ins { stroke: var(--color-ins); }
.donut-segment.pmi { stroke: var(--color-pmi); }
.donut-segment.hoa { stroke: var(--color-hoa); }

.chart-center-text {
  transform: rotate(90deg); /* Counter-rotate center text */
  transform-origin: 100px 100px;
  text-anchor: middle;
}

.chart-total-text {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  fill: var(--text-bright);
}

.chart-sub-text {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  fill: var(--text-dark);
  letter-spacing: 0.05em;
}

.chart-legend {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
  max-width: 320px;
  width: 100%;
}

.legend-item {
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.legend-color {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.legend-color.pi { background-color: var(--color-pi); }
.legend-color.tax { background-color: var(--color-tax); }
.legend-color.ins { background-color: var(--color-ins); }
.legend-color.pmi { background-color: var(--color-pmi); }
.legend-color.hoa { background-color: var(--color-hoa); }

.legend-label {
  flex-grow: 1;
}

.legend-val {
  font-weight: 600;
  color: var(--text-bright);
}

/* Affordability Panel */
.dti-metric {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.dti-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1;
}

.dti-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.dti-title {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-dti {
  font-size: 0.65rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  width: fit-content;
  letter-spacing: 0.02em;
}

.progress-bar-container {
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  position: relative;
  margin-bottom: 2rem;
}

.progress-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 0.35s ease, background-color 0.35s ease;
}

.progress-bar.bg-healthy,
.badge-dti.bg-healthy {
  background-color: var(--color-healthy);
  color: #070908;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

.progress-bar.bg-moderate,
.badge-dti.bg-moderate {
  background-color: var(--color-moderate);
  color: #070908;
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.progress-bar.bg-high,
.badge-dti.bg-high {
  background-color: var(--color-high);
  color: #070908;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

.progress-markers {
  position: absolute;
  top: 10px;
  left: 0;
  right: 0;
  height: 12px;
}

.marker {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-dark);
}

.marker::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 6px;
  background-color: var(--text-dark);
}

.dti-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Footer */
.main-footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-dark);
  margin-top: 3rem;
}

/* Amortization Button */
.btn-view-amort {
  background: var(--accent-emerald-dim);
  border: 1px solid var(--accent-emerald);
  color: var(--accent-emerald);
  border-radius: 0.75rem;
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  margin-bottom: 1.5rem;
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}

.btn-view-amort:hover {
  background: var(--accent-emerald);
  color: #070908;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.3);
}

/* Amortization Schedule Page Layout */
.amort-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.amort-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.amort-header h1 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--text-bright);
}

.amort-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.summary-card .label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.summary-card .val {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-bright);
}

.summary-card .val.accent {
  color: var(--accent-emerald);
}

.amort-table-wrapper {
  background: var(--bg-panel);
  border: 1px solid #4b5563;
  border-radius: 1rem;
  overflow: hidden;
  max-height: 600px;
  overflow-y: auto;
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.2);
}

.amort-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.amort-table th,
.amort-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid #4b5563;
  border-right: 1px solid #4b5563;
}

.amort-table th:last-child,
.amort-table td:last-child {
  border-right: none;
}

.amort-table th {
  background: var(--bg-card);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--accent-emerald);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 2px solid var(--accent-emerald) !important;
  box-shadow: 0 1px 0 #4b5563;
}

.amort-table tr {
  transition: background-color 0.15s ease;
}

.amort-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.amort-table tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.01);
}

.amort-table tr.payoff-highlight {
  background: rgba(16, 185, 129, 0.08);
  font-weight: 600;
}

.amort-table tr.payoff-highlight td {
  border-bottom: 2px solid var(--accent-emerald);
  color: var(--accent-emerald);
}

.amort-table td.dim {
  color: var(--text-dark);
}

/* Back Link button styles */
.btn-back-link {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-bright);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}

.btn-back-link:hover {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

/* Print Styles */
@media print {
  body {
    background: #000000 !important;
    color: #ffffff !important;
  }
  
  .amort-container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  
  .btn-back-link,
  .main-footer {
    display: none !important;
  }
  
  .summary-card {
    border: 1px solid var(--border-color) !important;
    background: var(--bg-card) !important;
  }
  
  .summary-card .val,
  .summary-card .label {
    color: var(--text-bright) !important;
  }
  
  .amort-table-wrapper {
    max-height: none !important;
    overflow: visible !important;
    border: 1px solid var(--border-color) !important;
  }
  
  .amort-table th {
    background: var(--bg-card) !important;
    color: var(--accent-emerald) !important;
    position: static !important;
  }
  
  .amort-table td {
    border-bottom: 1px solid var(--border-color) !important;
    color: var(--text-bright) !important;
  }
}

/* Rates Attribution */
.rates-attribution-text {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-weight: 500;
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.rates-attribution-text.visible {
  opacity: 0.7;
}

/* Amortization Burndown Chart */
.burndown-chart-card {
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  border-radius: 0.75rem;
}

.burndown-chart-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-bright);
  font-family: var(--font-display);
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.chart-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-muted);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.legend-dot.color-30 {
  background-color: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.legend-dot.color-15 {
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

.burndown-chart-wrapper {
  position: relative;
  width: 100%;
  height: 150px;
}

#burndown-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-grid-line {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-dasharray: 4,4;
  stroke-width: 1;
}

.chart-axis {
  stroke: var(--border-color);
  stroke-width: 1.5;
}

.chart-path-30 {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 4px rgba(6, 182, 212, 0.4));
}

.chart-path-15 {
  fill: none;
  stroke: var(--accent-emerald);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 4px rgba(16, 185, 129, 0.4));
}

.chart-axis-text {
  fill: var(--text-dark);
  font-size: 0.65rem;
  font-family: var(--font-sans);
  font-weight: 500;
}