/* ==========================================================================
   LoyerLégal Paris - Design System & Stylesheet
   Modern, production-ready SaaS design for Paris Rent Control Web App
   ========================================================================== */

:root {
  /* Color Palette */
  --color-primary: #1d4ed8;
  --color-primary-hover: #1e40af;
  --color-primary-light: #eff6ff;
  --color-primary-border: #bfdbfe;

  --color-navy: #0f172a;
  --color-slate-900: #0f172a;
  --color-slate-800: #1e293b;
  --color-slate-700: #334155;
  --color-slate-600: #475569;
  --color-slate-500: #64748b;
  --color-slate-400: #94a3b8;
  --color-slate-300: #cbd5e1;
  --color-slate-200: #e2e8f0;
  --color-slate-100: #f1f5f9;
  --color-slate-50: #f8fafc;
  --color-white: #ffffff;

  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-danger-light: #fef2f2;
  --color-danger-border: #fca5a5;
  --color-danger-glow: rgba(220, 38, 38, 0.25);

  --color-success: #059669;
  --color-success-hover: #047857;
  --color-success-light: #ecfdf5;
  --color-success-border: #6ee7b7;
  --color-success-glow: rgba(5, 150, 105, 0.25);

  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --color-warning-border: #fde68a;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Plus Jakarta Sans', var(--font-sans);
  --font-serif: 'Georgia', 'Times New Roman', serif;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.1), 0 1px 2px -1px rgba(15, 23, 42, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.1), 0 2px 4px -2px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);

  /* Borders & Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-slate-800);
  background-color: var(--color-slate-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

button, input, select, textarea {
  font: inherit;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section {
  padding: 4.5rem 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.5rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.25;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-slate-600);
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(29, 78, 216, 0.35);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(29, 78, 216, 0.45);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35);
}

.btn-danger:hover {
  background-color: var(--color-danger-hover);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.45);
}

.btn-outline {
  background-color: var(--color-white);
  color: var(--color-slate-700);
  border-color: var(--color-slate-300);
}

.btn-outline:hover {
  background-color: var(--color-slate-50);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.text-danger { color: var(--color-danger) !important; }
.text-success { color: var(--color-success) !important; }
.hidden { display: none !important; }

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-slate-200);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.logo-icon-wrap {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #1e40af, #3b82f6);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.logo-icon {
  font-size: 1.25rem;
}

.logo-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--color-primary);
}

.logo-subtitle {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-slate-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-slate-600);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color var(--transition-fast);
}

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

.nav-cta {
  margin-left: 0.5rem;
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  font-size: 1.35rem;
  color: var(--color-slate-700);
  cursor: pointer;
  padding: 0.5rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  background: radial-gradient(120% 100% at 50% 0%, #ffffff 0%, #f1f5f9 100%);
  border-bottom: 1px solid var(--color-slate-200);
  text-align: center;
}

.hero-container {
  max-width: 920px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  background-color: var(--color-white);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.badge-pulse {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-slate-900);
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-description {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-slate-600);
  margin-bottom: 2.25rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  padding: 1.1rem 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-align: left;
  box-shadow: var(--shadow-xs);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.1;
}

.stat-label {
  display: block;
  font-size: 0.77rem;
  color: var(--color-slate-500);
  font-weight: 500;
  line-height: 1.25;
  margin-top: 0.2rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Map Section
   ========================================================================== */

.map-section {
  background-color: var(--color-slate-50);
}

.map-chips-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  background: var(--color-white);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-xs);
}

.chips-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-slate-700);
  white-space: nowrap;
}

.chips-scroll {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: thin;
}

.chip-btn {
  background: var(--color-slate-100);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-full);
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-slate-700);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.chip-btn:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-primary-border);
}

.chip-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 2px 6px rgba(29, 78, 216, 0.35);
}

.map-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.map-wrapper {
  position: relative;
  width: 100%;
}

.leaflet-map {
  width: 100%;
  height: 520px;
  background-color: #e5e7eb;
  z-index: 1;
}

/* Custom Leaflet Map styling */
.map-legend {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  z-index: 500;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-md);
}

.legend-header {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-slate-600);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-items {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.legend-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.tier-high { background: #fee2e2; color: #991b1b; border-left: 3px solid #dc2626; }
.tier-mid  { background: #fef3c7; color: #92400e; border-left: 3px solid #f59e0b; }
.tier-low  { background: #e0f2fe; color: #075985; border-left: 3px solid #0284c7; }

/* Custom Leaflet Circle Marker with Arrondissement Number */
.arrondissement-pin {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--color-white);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-slate-900);
  font-size: 0.72rem;
  font-weight: 800;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.arrondissement-pin:hover,
.arrondissement-pin.active {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.25);
  z-index: 999;
}

/* Custom Popup */
.custom-leaflet-popup .leaflet-popup-content-wrapper {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0;
  overflow: hidden;
}

.custom-leaflet-popup .leaflet-popup-content {
  margin: 0;
  padding: 1rem 1.25rem;
  font-family: var(--font-sans);
  min-width: 230px;
}

.map-popup-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: 0.2rem;
}

.map-popup-sub {
  font-size: 0.75rem;
  color: var(--color-slate-500);
  margin-bottom: 0.75rem;
}

.map-popup-rates {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
  margin-bottom: 0.85rem;
}

.popup-rate-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  padding: 0.15rem 0;
}

.popup-rate-row strong {
  color: var(--color-primary);
}

.btn-popup-select {
  width: 100%;
  padding: 0.45rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Arrondissement info preview panel below map */
.map-info-panel {
  background: var(--color-white);
  border-top: 1px solid var(--color-slate-200);
  padding: 1.25rem 1.5rem;
}

.info-panel-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.info-panel-title-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.info-badge {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 2px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  flex-shrink: 0;
}

.info-panel-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.2;
}

.info-panel-sub {
  font-size: 0.85rem;
  color: var(--color-slate-500);
  margin-top: 0.15rem;
}

.info-panel-metrics {
  display: flex;
  gap: 1.5rem;
}

.info-metric {
  display: flex;
  flex-direction: column;
}

.info-metric .metric-label {
  font-size: 0.75rem;
  color: var(--color-slate-500);
  font-weight: 600;
}

.info-metric .metric-val {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-slate-800);
}

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

/* ==========================================================================
   Google AdSense Banners
   ========================================================================== */

.adsense-container {
  margin: 2.5rem auto;
}

.adsense-card {
  background: var(--color-white);
  border: 1px dashed var(--color-slate-300);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
}

.adsense-label {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-slate-400);
  margin-bottom: 0.75rem;
}

.adsense-placeholder-box {
  min-height: 90px;
  background-color: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 1rem;
}

.ad-icon {
  font-size: 1.75rem;
  color: var(--color-slate-400);
}

.ad-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-slate-600);
}

.ad-desc {
  font-size: 0.75rem;
  color: var(--color-slate-400);
}

/* ==========================================================================
   Rent Calculator Form Section
   ========================================================================== */

.calculator-section {
  background-color: var(--color-slate-100);
  border-top: 1px solid var(--color-slate-200);
  border-bottom: 1px solid var(--color-slate-200);
}

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

.calc-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.calc-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-slate-100);
}

.calc-header-icon {
  width: 46px;
  height: 46px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.calc-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.2;
}

.calc-sub {
  font-size: 0.85rem;
  color: var(--color-slate-500);
  margin-top: 0.2rem;
}

/* Preset quick-select buttons */
.preset-buttons-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.preset-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-slate-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.preset-btn {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-slate-700);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.preset-btn:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-border);
  color: var(--color-primary);
}

/* Form inputs & controls */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-slate-800);
  margin-bottom: 0.4rem;
}

.form-label .required {
  color: var(--color-danger);
}

.form-label i {
  color: var(--color-primary);
  margin-right: 0.35rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  color: var(--color-slate-900);
  background-color: var(--color-white);
  border: 1px solid var(--color-slate-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-helper {
  display: block;
  font-size: 0.77rem;
  color: var(--color-slate-500);
  margin-top: 0.35rem;
}

.select-wrapper {
  position: relative;
}

.select-wrapper select {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  padding-right: 2.5rem;
}

.select-wrapper::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.8rem;
  color: var(--color-slate-400);
}

/* Segmented Toggle Control */
.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.rooms-control {
  grid-template-columns: repeat(4, 1fr);
}

.segment-option {
  position: relative;
  cursor: pointer;
}

.segment-option input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.segment-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 0.5rem;
  background-color: var(--color-slate-100);
  border: 1px solid var(--color-slate-300);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-slate-700);
  text-align: center;
  transition: all var(--transition-fast);
}

.segment-option:hover .segment-pill {
  background-color: var(--color-slate-200);
}

.segment-option input:checked + .segment-pill {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 2px 6px rgba(29, 78, 216, 0.3);
}

.form-row {
  display: flex;
  gap: 1rem;
}

.col-half {
  flex: 1;
}

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

.input-with-suffix .form-control {
  padding-right: 4.5rem;
}

.input-suffix {
  position: absolute;
  right: 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-slate-500);
  pointer-events: none;
}

/* Collapsible advanced parameters */
.advanced-params {
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  background: var(--color-slate-50);
  overflow: hidden;
}

.advanced-summary {
  padding: 0.75rem 1rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-slate-700);
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-fast);
}

.advanced-summary:hover {
  background-color: var(--color-slate-100);
}

.advanced-content {
  padding: 1rem;
  border-top: 1px solid var(--color-slate-200);
  background: var(--color-white);
}

.btn-calc-submit {
  font-size: 1.05rem;
  padding: 1rem;
}

/* ==========================================================================
   Dynamic Results Dashboard
   ========================================================================== */

.results-wrapper {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}

.results-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  min-height: 480px;
  display: flex;
  flex-direction: column;
}

.results-placeholder {
  margin: auto;
  text-align: center;
  padding: 3rem 1.5rem;
  max-width: 380px;
}

.placeholder-icon {
  width: 72px;
  height: 72px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1.5rem;
}

.results-placeholder h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: 0.6rem;
}

.results-placeholder p {
  font-size: 0.92rem;
  color: var(--color-slate-500);
  line-height: 1.5;
}

/* Active Results View */
.results-active {
  animation: slideUp 0.35s ease-out;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.results-status-banner {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* Illegal State */
.status-banner-danger {
  background: linear-gradient(135deg, #fef2f2, #fee2e2);
  border: 2px solid var(--color-danger-border);
}

.status-badge-danger {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--color-danger);
  color: var(--color-white);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.35);
}

.status-headline-danger {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--color-danger);
  line-height: 1.2;
}

/* Compliant State */
.status-banner-success {
  background: linear-gradient(135deg, #ecfdf5, #d1fae5);
  border: 2px solid var(--color-success-border);
}

.status-badge-success {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--color-success);
  color: var(--color-white);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.35);
}

.status-headline-success {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--color-success);
  line-height: 1.2;
}

.status-sub {
  font-size: 0.88rem;
  color: var(--color-slate-600);
  margin-top: 0.4rem;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-box {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
}

.metric-box-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-slate-500);
  margin-bottom: 0.25rem;
}

.metric-box-val {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-slate-900);
  line-height: 1.15;
}

.metric-box-sub {
  font-size: 0.75rem;
  color: var(--color-slate-500);
  margin-top: 0.2rem;
}

.box-danger {
  background-color: var(--color-danger-light);
  border-color: var(--color-danger-border);
}

.box-danger .metric-box-val {
  color: var(--color-danger);
}

.box-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning-border);
}

.box-warning .metric-box-val {
  color: var(--color-warning);
}

.box-accent {
  background-color: #f5f3ff;
  border-color: #ddd6fe;
}

.box-accent .metric-box-val {
  color: #6d28d9;
}

/* Visual Progress / Comparison Bar */
.comparison-bar-section {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.comparison-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.bar-title {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--color-slate-800);
}

.bar-legend-text {
  font-size: 0.75rem;
  color: var(--color-slate-500);
}

.visual-progress-track {
  display: flex;
  height: 28px;
  background-color: var(--color-slate-200);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 1rem;
}

.progress-segment {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-white);
  transition: width 0.5s ease;
  overflow: hidden;
  white-space: nowrap;
}

.seg-reference {
  background-color: #3b82f6;
  width: 55%;
}

.seg-ceiling {
  background-color: #10b981;
  width: 25%;
}

.seg-excess {
  background: repeating-linear-gradient(
    45deg,
    #dc2626,
    #dc2626 10px,
    #b91c1c 10px,
    #b91c1c 20px
  );
  width: 20%;
}

.comparison-details-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.detail-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: var(--color-slate-700);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dot-ref { background-color: #3b82f6; }
.dot-ceiling { background-color: #10b981; }
.dot-current { background-color: #dc2626; }

.results-cta-wrap {
  text-align: center;
}

.cta-notice {
  font-size: 0.75rem;
  color: var(--color-slate-500);
  margin-top: 0.6rem;
}

/* ==========================================================================
   Pre-filled Legal Letter Generator
   ========================================================================== */

.letter-section {
  background-color: var(--color-white);
}

.letter-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 2rem;
  align-items: start;
}

.letter-params-card {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.letter-params-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: 0.35rem;
}

.letter-params-desc {
  font-size: 0.82rem;
  color: var(--color-slate-500);
  margin-bottom: 1.25rem;
}

.params-divider {
  border: 0;
  height: 1px;
  background: var(--color-slate-200);
  margin: 1.25rem 0;
}

.letter-actions-panel {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.copy-toast {
  background-color: var(--color-slate-900);
  color: var(--color-white);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  text-align: center;
  box-shadow: var(--shadow-md);
  animation: fadeInOut 2.5s ease forwards;
}

@keyframes fadeInOut {
  0% { opacity: 0; transform: translateY(4px); }
  15% { opacity: 1; transform: translateY(0); }
  85% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-4px); }
}

/* Formal Letter Paper */
.letter-paper-wrap {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-slate-300);
  overflow: hidden;
}

.letter-paper-header-badge {
  background-color: var(--color-slate-800);
  color: var(--color-white);
  padding: 0.65rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.letter-paper {
  background-color: var(--color-white);
  padding: 3rem 3.5rem;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  line-height: 1.7;
  color: #1e293b;
  min-height: 700px;
  outline: none;
  cursor: text;
}

.letter-paper:focus {
  background-color: #fafbfc;
}

.letter-header-block {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.letter-sender, .letter-recipient {
  line-height: 1.45;
}

.letter-recipient {
  text-align: right;
  background: var(--color-slate-50);
  padding: 0.85rem 1.25rem;
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.letter-meta {
  margin-bottom: 1.75rem;
}

.letter-date {
  text-align: right;
  margin-bottom: 1rem;
  font-style: italic;
}

.letter-object {
  background-color: var(--color-slate-100);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.letter-registered-notice {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-danger);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.letter-body p {
  margin-bottom: 1rem;
  text-align: justify;
}

.letter-highlight-box {
  background: var(--color-slate-50);
  border: 1px solid var(--color-slate-300);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  margin: 1.25rem 0;
  font-family: monospace;
  font-size: 0.88rem;
}

.letter-demands-list {
  margin: 1.25rem 0 1.25rem 1.5rem;
}

.letter-demands-list li {
  margin-bottom: 0.6rem;
}

.letter-signature-block {
  margin-top: 2.5rem;
  text-align: right;
}

/* ==========================================================================
   SEO Guide & FAQ Section
   ========================================================================== */

.seo-guide-section {
  background-color: var(--color-slate-50);
  border-top: 1px solid var(--color-slate-200);
}

.seo-guide-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.guide-article {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  gap: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.article-icon {
  width: 54px;
  height: 54px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.article-body p {
  color: var(--color-slate-700);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.article-body ul, .article-body ol {
  margin: 1rem 0 1.25rem 1.5rem;
  color: var(--color-slate-700);
}

.article-body li {
  margin-bottom: 0.65rem;
  line-height: 1.6;
}

.guide-steps {
  list-style: none;
  margin-left: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.guide-steps li {
  background: var(--color-slate-50);
  border-left: 4px solid var(--color-primary);
  padding: 0.85rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 0;
}

.guide-callout {
  background-color: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--color-slate-800);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.guide-callout i {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-top: 0.15rem;
}

/* FAQ Accordion */
.faq-container {
  max-width: 860px;
  margin: 0 auto;
}

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

.faq-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-slate-900);
  margin-bottom: 0.4rem;
}

.faq-sub {
  font-size: 0.95rem;
  color: var(--color-slate-500);
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-primary-border);
}

.faq-question {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-slate-800);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  list-style: none;
  user-select: none;
  transition: background-color var(--transition-fast);
}

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

.faq-question:hover {
  background-color: var(--color-slate-50);
  color: var(--color-primary);
}

.faq-icon {
  font-size: 0.85rem;
  color: var(--color-slate-400);
  transition: transform var(--transition-normal);
}

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

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--color-slate-600);
  line-height: 1.65;
  border-top: 1px solid var(--color-slate-100);
  padding-top: 1rem;
}

.faq-answer ul {
  margin: 0.6rem 0 0.6rem 1.25rem;
}

.faq-answer li {
  margin-bottom: 0.4rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-slate-900);
  color: var(--color-slate-300);
  padding-top: 4.5rem;
}

.footer-container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 3.5rem;
}

.brand-col .logo-title {
  color: var(--color-white);
}

.brand-col .logo-subtitle {
  color: var(--color-slate-400);
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--color-slate-400);
  margin: 1.25rem 0;
}

.footer-security-note {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--color-slate-300);
  border-left: 3px solid #10b981;
}

.footer-col-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a,
.footer-modal-trigger {
  color: var(--color-slate-400);
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition-fast);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  text-align: left;
}

.footer-links a:hover,
.footer-modal-trigger:hover {
  color: var(--color-white);
}

.footer-disclaimer {
  margin-top: 1.25rem;
  font-size: 0.72rem;
  color: var(--color-slate-500);
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.5rem 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--color-slate-500);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-tags {
  display: flex;
  gap: 0.5rem;
}

.tag-badge {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-slate-300);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
}

/* ==========================================================================
   Native Modal Dialogs
   ========================================================================== */

.app-modal {
  margin: auto;
  border: none;
  background: transparent;
  padding: 1rem;
  max-width: 600px;
  width: 90%;
}

.app-modal::backdrop {
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
}

.modal-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-slate-200);
  position: relative;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-slate-200);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-slate-900);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.25rem;
  color: var(--color-slate-400);
  cursor: pointer;
  padding: 0.4rem;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  color: var(--color-slate-700);
  background-color: var(--color-slate-100);
}

.modal-body {
  font-size: 0.95rem;
  color: var(--color-slate-600);
  line-height: 1.6;
}

.modal-body h4 {
  font-family: var(--font-display);
  color: var(--color-slate-900);
  margin: 1rem 0 0.35rem;
}

/* ==========================================================================
   Print Stylesheet
   ========================================================================== */

@media print {
  /* Hide all unnecessary elements on print */
  .site-header,
  .hero-section,
  .map-section,
  .calculator-section,
  .adsense-container,
  .seo-guide-section,
  .site-footer,
  .letter-params-card,
  .letter-paper-header-badge,
  .section-header,
  .app-modal {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
  }

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

  .letter-layout {
    display: block !important;
  }

  .letter-paper-wrap {
    box-shadow: none !important;
    border: none !important;
  }

  .letter-paper {
    padding: 0 !important;
    min-height: auto !important;
    color: #000000 !important;
  }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.35rem;
  }

  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .results-wrapper {
    position: static;
  }

  .letter-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .site-header {
    height: auto;
    padding: 0.75rem 0;
  }

  .mobile-toggle {
    display: block;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-slate-200);
    box-shadow: var(--shadow-lg);
    gap: 1.25rem;
    align-items: flex-start;
  }

  .main-nav.active {
    display: flex;
  }

  .hero-title {
    font-size: 1.95rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-stats-grid {
    grid-template-columns: 1fr;
  }

  .leaflet-map {
    height: 400px;
  }

  .info-panel-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .info-panel-metrics {
    width: 100%;
    justify-content: space-between;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .rooms-control {
    grid-template-columns: 1fr 1fr;
  }

  .guide-article {
    flex-direction: column;
    padding: 1.5rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .letter-paper {
    padding: 1.75rem 1.25rem;
  }

  .letter-header-block {
    flex-direction: column;
  }

  .letter-recipient {
    text-align: left;
  }
}