/**
 * The Impact Investor — Sustainable Finance Calculators Styling
 * Adheres to UI/UX Pro Max design standards, WCAG 2.2 AA contrast, and dark mode tokens.
 */

:root {
  --tii-calc-card-bg: #ffffff;
  --tii-calc-card-border: #e2e8f0;
  --tii-calc-input-bg: #ffffff;
  --tii-calc-input-border: #cbd5e1;
  --tii-calc-input-focus: #00733b;
  --tii-calc-result-bg: #f8fafc;
  --tii-calc-result-border: #e2e8f0;
  --tii-calc-accent-green: #008744;
  --tii-calc-accent-green-light: #e6f4ea;
  --tii-calc-accent-blue: #0284c7;
  --tii-calc-accent-blue-light: #e0f2fe;
  --tii-calc-slider-track: #e2e8f0;
  --tii-calc-slider-fill: #008744;
}

[data-theme="dark"] {
  --tii-calc-card-bg: #131b26;
  --tii-calc-card-border: #1e293b;
  --tii-calc-input-bg: #0b0f17;
  --tii-calc-input-border: #334155;
  --tii-calc-input-focus: #00a854;
  --tii-calc-result-bg: #0b0f17;
  --tii-calc-result-border: #1e293b;
  --tii-calc-accent-green: #00a854;
  --tii-calc-accent-green-light: rgba(0, 168, 84, 0.15);
  --tii-calc-accent-blue: #38bdf8;
  --tii-calc-accent-blue-light: rgba(56, 189, 248, 0.15);
  --tii-calc-slider-track: #334155;
  --tii-calc-slider-fill: #00a854;
}

/* Calculator Wrapper */
.tii-calc-container {
  max-width: 960px;
  margin: 0 auto;
  font-family: 'Public Sans', system-ui, -apple-system, sans-serif;
}

.tii-calc-card {
  background-color: var(--tii-calc-card-bg);
  border: 1px solid var(--tii-calc-card-border);
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.05);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

@media (max-width: 640px) {
  .tii-calc-card {
    padding: 1.25rem;
  }
}

.tii-calc-header {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--tii-calc-card-border);
}

.tii-calc-title {
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--tii-text-main);
  margin: 0 0 0.5rem;
}

.tii-calc-subtitle {
  font-size: 0.9375rem;
  color: var(--tii-text-muted);
  margin: 0;
  line-height: 1.6;
}

/* Form Layout */
.tii-calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.tii-calc-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tii-calc-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--tii-text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tii-calc-helper {
  font-size: 0.75rem;
  color: var(--tii-text-muted);
  font-weight: 400;
}

.tii-calc-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.tii-calc-input-prefix {
  position: absolute;
  left: 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--tii-text-muted);
  pointer-events: none;
}

.tii-calc-input-suffix {
  position: absolute;
  right: 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--tii-text-muted);
  pointer-events: none;
}

.tii-calc-input,
.tii-calc-select {
  width: 100%;
  height: 48px;
  padding: 0.625rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--tii-text-main);
  background-color: var(--tii-calc-input-bg);
  border: 1px solid var(--tii-calc-input-border);
  border-radius: 0.625rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
  box-sizing: border-box;
}

.tii-calc-input.has-prefix {
  padding-left: 2.25rem;
}

.tii-calc-input.has-suffix {
  padding-right: 2.75rem;
}

.tii-calc-input:focus,
.tii-calc-select:focus {
  border-color: var(--tii-calc-input-focus);
  box-shadow: 0 0 0 3px rgba(0, 135, 68, 0.2);
}

/* Range Slider */
.tii-calc-slider-wrap {
  margin-top: 0.5rem;
}

.tii-calc-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--tii-calc-slider-track);
  border-radius: 9999px;
  outline: none;
  transition: background 0.15s ease;
}

.tii-calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--tii-calc-slider-fill);
  cursor: pointer;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s ease;
}

.tii-calc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.tii-calc-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--tii-calc-slider-fill);
  cursor: pointer;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s ease;
}

.tii-calc-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
}

/* Results Card */
.tii-calc-results {
  background-color: var(--tii-calc-result-bg);
  border: 1px solid var(--tii-calc-result-border);
  border-radius: 0.875rem;
  padding: 1.75rem;
  margin-top: 2rem;
  transition: background-color 0.25s ease;
}

.tii-calc-results-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--tii-text-main);
  margin: 0 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tii-calc-hero-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem;
  background-color: var(--tii-calc-accent-green-light);
  border-radius: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tii-calc-hero-stat-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--tii-text-main);
}

.tii-calc-hero-stat-value {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--tii-calc-accent-green);
}

.tii-calc-metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.tii-calc-metric-box {
  background-color: var(--tii-calc-card-bg);
  border: 1px solid var(--tii-calc-card-border);
  padding: 1.125rem;
  border-radius: 0.625rem;
}

.tii-calc-metric-box-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tii-text-muted);
  margin-bottom: 0.375rem;
}

.tii-calc-metric-box-value {
  font-family: 'Manrope', sans-serif;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--tii-text-main);
}

/* Category Hub Cards */
.tii-calc-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 3rem;
}

.tii-calc-hub-card {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-radius: 0.875rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.tii-calc-hub-card:hover {
  transform: translateY(-3px);
  border-color: var(--tii-primary);
  box-shadow: 0 8px 20px -4px rgba(0, 115, 59, 0.12);
}

.tii-calc-hub-icon {
  width: 48px;
  height: 48px;
  border-radius: 0.75rem;
  background-color: var(--tii-badge-green-bg);
  color: var(--tii-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.tii-calc-hub-card-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--tii-text-main);
  margin: 0 0 0.5rem;
}

.tii-calc-hub-card-desc {
  font-size: 0.875rem;
  color: var(--tii-text-muted);
  line-height: 1.55;
  margin: 0 0 1.25rem;
  flex-grow: 1;
}

.tii-calc-hub-card-cta {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--tii-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

/* Editorial Decision Guide & Content Sections */
.tii-calc-editorial-wrap {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.tii-calc-guide-box {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-radius: 1rem;
  padding: 2.25rem;
  box-shadow: var(--tii-card-shadow, 0 4px 12px rgba(0,0,0,0.04));
}

.tii-calc-guide-title {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 800;
  color: var(--tii-text-main);
  margin: 0 0 1.25rem;
  line-height: 1.3;
}

.tii-calc-guide-body p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--tii-text-muted);
  margin: 0 0 1.25rem;
}

.tii-calc-guide-body p:last-child {
  margin-bottom: 0;
}

.tii-calc-guide-body strong {
  color: var(--tii-text-main);
  font-weight: 700;
}

/* Formula & Methodology Breakdown Box */
.tii-calc-formula-box {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-left: 4px solid var(--tii-primary);
  border-radius: 1rem;
  padding: 2rem 2.25rem;
}

.tii-calc-formula-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tii-calc-formula-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 0.5rem;
  background-color: var(--tii-badge-green-bg);
  color: var(--tii-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tii-calc-formula-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--tii-text-main);
  margin: 0;
}

.tii-calc-formula-code {
  background-color: var(--tii-border-subtle);
  border: 1px solid var(--tii-border);
  border-radius: 0.625rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  overflow-x: auto;
}

.tii-calc-formula-code code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--tii-text-main);
  line-height: 1.5;
}

.tii-calc-formula-desc {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--tii-text-muted);
  margin: 0;
}

.tii-calc-formula-desc code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  background-color: var(--tii-border-subtle);
  padding: 0.15rem 0.35rem;
  border-radius: 0.25rem;
  color: var(--tii-text-main);
}

/* Benefits & Key Considerations Grid */
.tii-calc-benefits-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tii-calc-benefits-heading {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 800;
  color: var(--tii-text-main);
  margin: 0;
}

.tii-calc-benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.tii-calc-benefit-card {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-radius: 0.875rem;
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.tii-calc-benefit-icon {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 9999px;
  background-color: var(--tii-badge-green-bg);
  color: var(--tii-badge-green-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.tii-calc-benefit-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--tii-text-main);
  margin: 0 0 0.375rem;
}

.tii-calc-benefit-desc {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--tii-text-muted);
  margin: 0;
}

/* Frequently Asked Questions (FAQ) Section */
.tii-calc-faq-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.tii-calc-faq-heading {
  font-family: 'Manrope', sans-serif;
  font-size: clamp(1.375rem, 2.5vw, 1.75rem);
  font-weight: 800;
  color: var(--tii-text-main);
  margin: 0;
}

.tii-calc-faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.tii-calc-faq-item {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-radius: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tii-calc-faq-item[open] {
  border-color: var(--tii-primary);
  box-shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.05);
}

.tii-calc-faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.125rem 1.25rem;
  font-family: 'Manrope', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--tii-text-main);
  cursor: pointer;
  list-style: none;
  user-select: none;
  gap: 1rem;
}

.tii-calc-faq-question::-webkit-details-marker {
  display: none;
}

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

.tii-calc-faq-chevron {
  color: var(--tii-text-muted);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.tii-calc-faq-item[open] .tii-calc-faq-chevron {
  transform: rotate(180deg);
  color: var(--tii-primary);
}

.tii-calc-faq-answer {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--tii-text-muted);
  border-top: 1px solid var(--tii-border-subtle);
  padding-top: 1rem;
}

.tii-calc-faq-answer p {
  margin: 0;
}

/* Standards & Transparency Footer */
.tii-calc-standards-footer {
  background-color: var(--tii-surface);
  border: 1px solid var(--tii-border);
  border-radius: 0.875rem;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--tii-text-muted);
  line-height: 1.65;
}

.tii-calc-standards-icon {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.375rem;
  background-color: var(--tii-border-subtle);
  color: var(--tii-text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}

.tii-calc-standards-footer a {
  color: var(--tii-primary);
  font-weight: 600;
  text-decoration: underline;
}

.tii-calc-standards-footer a:hover {
  color: var(--tii-primary-hover);
}