/* ==========================================================================
   KM to Miles Online - Clean Human Utility Design System
   Fast, accessible, and high-contrast converter for distance, pace & speed.
   ========================================================================== */

/* Fonts are now loaded via <link rel="preconnect"/stylesheet"> tags in each
   page's <head> instead of @import, since @import blocks CSSOM construction
   until the remote stylesheet is fetched. See index.html <head> for the tags. */

/* Color Palette - Light Mode (Default) */
:root, [data-theme="light"] {
  --bg-canvas: #f0f2f5;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f8fafc;
  --bg-card: #ffffff;
  --card-border: #d1d5db;
  --card-border-hover: #9ca3af;
  
  --primary-green: #006633;
  --primary-green-hover: #005229;
  --primary-green-active: #003d1f;
  --primary-green-soft: #f0fdf4;
  --primary-green-border: #bbf7d0;
  --primary-green-text: #166534;

  --accent-slate: #334155;
  --accent-blue: #1d4ed8;
  --accent-gold: #b45309;
  
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-tertiary: #6b7280;
  --text-inverse: #ffffff;
  
  --input-bg: #ffffff;
  --input-border: #111827;
  --input-border-focus: #006633;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
}

/* Dark Theme (Crisp, High-Contrast GitHub style — Not neon AI) */
[data-theme="dark"] {
  --bg-canvas: #0f141d;
  --bg-surface: #18202c;
  --bg-surface-elevated: #1f2937;
  --bg-card: #18202c;
  --card-border: #374151;
  --card-border-hover: #4b5563;

  --primary-green: #10b981;
  --primary-green-hover: #059669;
  --primary-green-active: #047857;
  --primary-green-soft: rgba(16, 185, 129, 0.12);
  --primary-green-border: #059669;
  --primary-green-text: #34d399;

  --accent-slate: #94a3b8;
  --accent-blue: #60a5fa;
  --accent-gold: #f59e0b;

  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-tertiary: #9ca3af;
  --text-inverse: #0f141d;

  --input-bg: #111827;
  --input-border: #6b7280;
  --input-border-focus: #10b981;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-canvas);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
}

.container {
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.mono-font {
  font-family: 'JetBrains Mono', monospace;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--card-border);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--primary-green);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-name {
  display: flex;
  flex-direction: column;
}

.brand-name .title {
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-name .tag {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

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

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.25rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

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

.theme-toggle-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--primary-green);
  color: var(--text-primary);
}

/* Hero Section - Clean, Human, Straightforward */
.hero {
  padding: 2.25rem 0 1.25rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.85rem, 3.5vw, 2.65rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto;
}

/* Tool Wrapper & Main Card */
.tool-wrapper {
  margin: 1.25rem 0 3rem;
}

.converter-card {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

/* Mode Switcher Tabs - Simple & Familiar */
.mode-tabs {
  display: flex;
  background: var(--bg-canvas);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--card-border);
  max-width: 440px;
  margin: 0 auto 1.75rem;
  gap: 4px;
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

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

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

[data-theme="dark"] .tab-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--primary-green);
}

/* Converter Panels */
.converter-panel {
  display: none;
}

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

/* ==========================================================================
   CLASSIC UTILITY CONVERTER FORM (Matches user screenshot)
   ========================================================================== */
.converter-form-simple {
  max-width: 580px;
  margin: 0 auto;
  padding: 0.5rem 0;
}

.conv-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.1rem;
}

.conv-label {
  width: 70px;
  text-align: right;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  flex-shrink: 0;
}

.conv-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.conv-field {
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.85rem;
  font-size: 1.25rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  width: 240px;
  outline: none;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.06);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.conv-field:focus {
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(0, 102, 51, 0.15);
}

.conv-unit-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 95px;
}

.conv-swap-cell {
  width: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-swap-arrows {
  background: transparent;
  border: none;
  color: var(--primary-green);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, opacity 0.15s ease;
}

.btn-swap-arrows:hover {
  transform: scale(1.2);
  opacity: 0.85;
}

.btn-swap-arrows svg {
  stroke: var(--primary-green);
}

.conv-actions {
  display: flex;
  justify-content: center;
  gap: 0.85rem;
  margin-top: 1rem;
}

/* Green Buttons as specified by user screenshot */
.btn-conv-green {
  background-color: var(--primary-green);
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0.55rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid #004d26;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.22);
  cursor: pointer;
  font-family: inherit;
  min-width: 105px;
  transition: background-color var(--transition-fast), transform 0.1s ease, box-shadow var(--transition-fast);
}

.btn-conv-green:hover {
  background-color: var(--primary-green-hover);
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.28);
}

.btn-conv-green:active {
  background-color: var(--primary-green-active);
  transform: translateY(1px);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .btn-conv-green {
  border-color: #047857;
}

/* Result Highlight Banner */
.conv-result-banner {
  margin-top: 1.5rem;
  background: var(--primary-green-soft);
  border: 1px solid var(--primary-green-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.result-large-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-green-text);
  font-family: 'JetBrains Mono', monospace;
}

.result-formula-note {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

/* Slider Scrub (Compact & Clean) */
.slider-wrapper {
  margin: 1.5rem 0 1rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
}

.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  font-size: 0.88rem;
}

.slider-title {
  color: var(--text-secondary);
  font-weight: 500;
}

.slider-value-label {
  color: var(--primary-green);
  font-weight: 700;
}

.custom-range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--card-border);
  border-radius: var(--radius-pill);
  outline: none;
  cursor: pointer;
}

.custom-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-green);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  border: 2px solid #ffffff;
}

.custom-range-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-green);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  border: 2px solid #ffffff;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 0.45rem;
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
}

/* Precision Controls & Auxiliary Actions */
.converter-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--card-border);
  margin-bottom: 1.25rem;
}

.precision-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.precision-btn-group {
  display: flex;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.precision-btn {
  padding: 3px 8px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.precision-btn.active {
  background: var(--primary-green);
  color: #ffffff;
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
}

.pill-action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pill-action-btn:hover {
  color: var(--primary-green);
  border-color: var(--primary-green);
}

/* Presets Bar */
.presets-section {
  margin-top: 1rem;
}

.presets-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 5px;
}

.presets-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.preset-chip {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 5px;
}

.preset-chip:hover {
  border-color: var(--primary-green);
  color: var(--primary-green);
  background: var(--primary-green-soft);
}

.preset-chip.active {
  background: var(--primary-green);
  color: #ffffff;
  border-color: var(--primary-green);
}

.preset-badge {
  font-size: 0.72rem;
  padding: 1px 5px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-xs);
  font-family: 'JetBrains Mono', monospace;
}

.preset-chip.active .preset-badge {
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

/* Live Formula Explanation Card */
.formula-card {
  margin-top: 1.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.formula-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.formula-icon {
  font-size: 1.1rem;
}

.formula-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.formula-expression {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 600;
  background: var(--bg-surface);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--card-border);
}

/* Pace Extra Projections */
.race-projections {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--card-border);
}

.race-projections-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.race-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.race-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  text-align: center;
}

.race-name {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
}

.race-dist {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  margin-bottom: 0.35rem;
}

.race-time {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-green);
  font-family: 'JetBrains Mono', monospace;
}

/* Speed Extra Units */
.speed-multi-units {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.speed-unit-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.speed-unit-name {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.speed-unit-val {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary-green);
}

/* Content Sections */
.content-section {
  padding: 2.5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.section-header p {
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
  font-size: 0.98rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--primary-green);
}

.feature-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--primary-green-soft);
  color: var(--primary-green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.math-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xs);
  padding: 0.65rem 0.85rem;
  margin-top: 0.85rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
}

/* Reference Tables Section */
.tables-section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--card-border);
}

.table-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.table-search {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
  color: var(--text-primary);
  width: 220px;
  outline: none;
}

.table-search:focus {
  border-color: var(--primary-green);
}

.btn-secondary {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  color: var(--primary-green);
  border-color: var(--primary-green);
}

.table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.data-table th {
  background: var(--bg-surface-elevated);
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 2px solid var(--card-border);
  white-space: nowrap;
}

.data-table td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-secondary);
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background: var(--primary-green-soft);
}

.data-table tr.highlight-row {
  background: rgba(0, 102, 51, 0.05);
}

.table-link {
  color: var(--primary-green);
  text-decoration: none;
  font-weight: 600;
}

.table-link:hover {
  text-decoration: underline;
}

.table-pill {
  font-size: 0.72rem;
  padding: 2px 6px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xs);
  color: var(--text-tertiary);
  margin-left: 6px;
}

/* FAQ Accordion */
.faq-section {
  padding: 2.5rem 0 3.5rem;
  border-top: 1px solid var(--card-border);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: inherit;
}

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

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--primary-green);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Legal & Trust Pages */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  max-width: 720px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.65rem 0.85rem;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(0, 102, 51, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.trust-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.25rem 0;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.65rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.contact-direct-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.contact-result-box {
  display: none;
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background: var(--primary-green-soft);
  border: 1px solid var(--primary-green-border);
  border-radius: var(--radius-sm);
  color: var(--primary-green-text);
  font-weight: 500;
}

.legal-section {
  margin-bottom: 2rem;
}

.legal-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.legal-section p, .legal-section li {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.legal-section ul {
  padding-left: 1.5rem;
  margin: 0.5rem 0 1rem;
}

.legal-callout {
  padding: 0.85rem 1.1rem;
  background: var(--bg-surface-elevated);
  border-left: 3px solid var(--primary-green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.legal-callout.warning {
  border-left-color: var(--accent-gold);
  background: rgba(245, 158, 11, 0.08);
}

/* Footer - Clean Slate */
.footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--card-border);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-col h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-green);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.footer-bottom-links {
  display: flex;
  gap: 1.25rem;
}

.footer-bottom-links a {
  color: var(--text-tertiary);
  text-decoration: none;
}

.footer-bottom-links a:hover {
  color: var(--text-primary);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-surface);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: toastIn 0.25s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .container {
    max-width: 960px;
  }
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

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

  .who-uses-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .container {
    padding: 0 0.85rem;
  }

  .converter-card {
    padding: 1.25rem 0.75rem;
  }

  .nav-links {
    display: none;
  }

  .conv-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    margin-bottom: 0.75rem;
    width: 100%;
  }

  .conv-label {
    width: 44px;
    font-size: 1rem;
    text-align: right;
    flex-shrink: 0;
  }

  .conv-field {
    flex: 1;
    min-width: 0;
    max-width: 145px;
    font-size: 1.1rem;
    padding: 0.45rem 0.55rem;
  }

  .conv-unit-text {
    font-size: 0.95rem;
    min-width: 68px;
    flex-shrink: 0;
  }

  .btn-swap-arrows {
    font-size: 1.2rem;
    padding: 2px 4px;
  }

  .btn-conv-green {
    padding: 0.5rem 1.35rem;
    font-size: 1.05rem;
    min-width: 95px;
  }

  .conv-result-banner {
    padding: 0.75rem 0.85rem;
  }

  .result-large-text {
    font-size: 1.2rem;
  }

  .who-uses-grid {
    grid-template-columns: 1fr;
  }

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

  /* Contact page 2-col form collapse on mobile */
  #contactForm > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }
}

/* Print Styles */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .header, .hero, .tool-wrapper, .content-section, .faq-section, .footer, .toast-container, .table-controls {
    display: none !important;
  }

  .tables-section {
    padding: 0 !important;
  }

  .table-wrap {
    box-shadow: none !important;
    border: 1px solid #000000 !important;
  }
}