/* ==========================================
   CalcYourTrade - Main Stylesheet
   ========================================== */

/* ==========================================
   1. CSS VARIABLES
   ========================================== */
:root {
  /* Color Palette */
  --color-primary-dark: #12263A;
  --color-primary-accent: #FE4A49;
  --color-secondary-teal: #06BCC1;
  --color-secondary-yellow: #FED766;
  --color-tertiary-light: #F4F4F8;

  /* Semantic Colors */
  --color-bg: var(--color-tertiary-light);
  --color-card-bg: #FFFFFF;
  --color-text: var(--color-primary-dark);
  --color-text-light: #5A6C7D;
  --color-border: #E0E0E0;

  /* Warning Colors */
  --color-safe: var(--color-secondary-teal);
  --color-caution: var(--color-secondary-yellow);
  --color-danger: var(--color-primary-accent);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-h1: 32px;
  --font-size-h2: 24px;
  --font-size-h3: 20px;

  /* Layout */
  --container-max-width: 1200px;
  --border-radius: 8px;
  --shadow-sm: 0 2px 4px rgba(18, 38, 58, 0.1);
  --shadow-md: 0 4px 8px rgba(18, 38, 58, 0.15);
  --shadow-lg: 0 8px 16px rgba(18, 38, 58, 0.2);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ==========================================
   2. RESET & BASE STYLES
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--spacing-sm);
}

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

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

ul {
  list-style: none;
}

/* ==========================================
   3. LAYOUT & CONTAINERS
   ========================================== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary-dark);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-secondary-teal);
  outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================
   4. HEADER
   ========================================== */
.site-header {
  background: var(--color-card-bg);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-sm) 0;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1,
.logo .logo-title {
  font-size: 28px;
  margin: 0;
  color: var(--color-primary-dark);
  font-weight: 600;
  line-height: 1.2;
}

.tagline {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  margin: 0;
}

.main-nav ul {
  display: flex;
  gap: var(--spacing-md);
}

.main-nav a {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: background var(--transition-fast);
}

.main-nav a:hover {
  background: var(--color-tertiary-light);
}

/* ==========================================
   5. HERO SECTION
   ========================================== */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1a3a56 100%);
  color: white;
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.hero-title {
  color: white;
  font-size: 36px;
  margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
  font-size: var(--font-size-large);
  color: rgba(255, 255, 255, 0.9);
}

.rate-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(255, 255, 255, 0.15);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  font-size: var(--font-size-small);
}

.rate-indicator.loading .indicator-icon {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================
   6. CALCULATORS SECTION
   ========================================== */
.calculators-section {
  padding: var(--spacing-sm) 0;
}

/* Global Controls */
.global-controls {
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #1a3a5a 100%);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.controls-wrapper {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-end;
  flex-wrap: wrap;
  justify-content: center;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 200px;
  flex: 0 0 auto;
}

.control-label {
  color: white;
  font-weight: 600;
  font-size: 12px;
  margin: 0;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.global-select,
.control-item .form-control {
  background-color: white;
  font-weight: 500;
  font-size: 14px;
  height: 38px;
}

.global-select:focus,
.control-item .form-control:focus {
  border-color: var(--color-secondary-yellow);
  box-shadow: 0 0 0 3px rgba(254, 215, 102, 0.2);
}

.control-item .input-group-text {
  font-weight: 600;
  font-size: 14px;
}

/* Risk Toggle Buttons */
.btn-risk-toggle {
  background-color: rgba(255, 255, 255, 0.9);
  border: 2px solid var(--color-border);
  color: var(--color-text);
  font-weight: 600;
  font-size: 14px;
  padding: 0.375rem 0.75rem;
  min-width: 42px;
  border-left: none;
  border-radius: 0;
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-risk-toggle:hover:not(.active) {
  background-color: rgba(6, 188, 193, 0.1);
  border-color: var(--color-secondary-teal);
}

.btn-risk-toggle.active {
  background-color: var(--color-secondary-teal);
  color: white;
  border-color: var(--color-secondary-teal);
  font-weight: 700;
}

.btn-risk-toggle:last-of-type {
  border-top-right-radius: var(--border-radius);
  border-bottom-right-radius: var(--border-radius);
}

.input-group > .btn-risk-toggle {
  position: relative;
  z-index: 2;
}

/* Refresh Rates Button */
.btn-refresh-rates {
  background: linear-gradient(135deg, var(--color-secondary-teal) 0%, #05a0a5 100%);
  color: white;
  border: 2px solid transparent;
  font-weight: 600;
  font-size: 14px;
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
  cursor: pointer;
  white-space: nowrap;
  height: 38px;
}

.btn-refresh-rates svg {
  transition: transform 0.6s ease;
}

.btn-refresh-rates:hover {
  background: linear-gradient(135deg, #05a0a5 0%, var(--color-secondary-teal) 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(6, 188, 193, 0.3);
}

.btn-refresh-rates:active {
  transform: translateY(0);
}

.btn-refresh-rates.refreshing svg {
  animation: rotate-refresh 1s linear infinite;
}

@keyframes rotate-refresh {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Card Carousel Wrapper */
.card-carousel-wrapper {
  position: relative;
}

/* Card Carousel - Horizontal Scroll (Desktop) */
.card-carousel {
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

/* Hide scrollbar but keep functionality */
.card-carousel::-webkit-scrollbar {
  height: 8px;
}

.card-carousel::-webkit-scrollbar-track {
  background: var(--color-border);
  border-radius: 4px;
}

.card-carousel::-webkit-scrollbar-thumb {
  background: var(--color-secondary-teal);
  border-radius: 4px;
}

.card-carousel::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-accent);
}

/* Carousel Navigation Buttons */
.carousel-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: var(--color-secondary-teal);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 32px;
  font-weight: bold;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-fast);
  line-height: 1;
  padding: 0;
}

.carousel-nav-btn:hover {
  background: var(--color-secondary-yellow);
  color: var(--color-primary-dark);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
  transform: translateY(-50%) scale(1.1);
}

.carousel-nav-btn:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel-prev {
  left: -24px;
}

.carousel-next {
  right: -24px;
}

/* Hide navigation buttons on mobile */
@media (max-width: 767px) {
  .carousel-nav-btn {
    display: none !important;
  }
}

/* ==========================================
   7. CALCULATOR CARD
   ========================================== */
.calculator-card {
  flex: 0 0 400px;
  background: var(--color-card-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  scroll-snap-align: start;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  contain: layout style;
  display: flex;
  flex-direction: column;
  will-change: transform; /* Optimize animation performance */
}

.calculator-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--color-primary-dark);
  color: white;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.card-title {
  font-size: 20px;
  margin: 0;
  color: white;
}

.card-controls {
  display: flex;
  gap: var(--spacing-xs);
}

.card-controls .btn-close {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
  opacity: 1;
}

.card-controls .btn-close:hover {
  background: var(--color-danger);
}

/* Card Body */
.card-body {
  padding: var(--spacing-md);
  flex: 1;
  overflow-y: auto;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}


/* ==========================================
   7. BOOTSTRAP FORM OVERRIDES
   ========================================== */

/* Form spacing */
.mb-3 {
  margin-bottom: 1rem;
}

/* Form labels */
.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
  font-size: var(--font-size-small);
}

/* Text inputs */
.form-control {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 36px;
  color: var(--color-text);
  background-color: var(--color-card-bg);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-secondary-teal);
  box-shadow: 0 0 0 3px rgba(6, 188, 193, 0.1);
  background-color: var(--color-card-bg);
}

.form-control::placeholder {
  color: var(--color-text-light);
  opacity: 0.6;
}

.form-control[type="number"] {
  -moz-appearance: textfield;
}

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

/* Select dropdowns */
.form-select {
  width: 100%;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 36px;
  color: var(--color-text);
  background-color: var(--color-card-bg);
  cursor: pointer;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-secondary-teal);
  box-shadow: 0 0 0 3px rgba(6, 188, 193, 0.1);
  background-color: var(--color-card-bg);
}

/* Input groups with icons/text */
.input-group {
  display: flex;
  width: 100%;
}

.input-group .form-control {
  flex: 1 1 auto;
}

.input-group .form-control:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.input-group .form-control:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.input-group-text {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.65rem;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-tertiary-light);
  border: 2px solid var(--color-border);
  min-width: 40px;
  justify-content: center;
}

.input-group > .input-group-text:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
}

.input-group > .input-group-text:last-child {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left: none;
}

.input-group .form-control:focus {
  z-index: 3;
}

/* Help text */
.form-text {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  margin-top: var(--spacing-xs);
  display: block;
}

/* Validation states */
.form-control.is-valid,
.form-select.is-valid {
  border-color: var(--color-safe);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2306BCC1' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right calc(0.375em + 0.1875rem) center;
  background-size: calc(0.75em + 0.375rem);
  padding-right: calc(1.5em + 0.75rem);
}

.form-control.is-invalid,
.form-select.is-invalid {
  border-color: var(--color-danger);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23FE4A49'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23FE4A49' stroke='none'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right calc(0.375em + 0.1875rem) center;
  background-size: calc(0.75em + 0.375rem);
  padding-right: calc(1.5em + 0.75rem);
}

.invalid-feedback {
  display: none;
  width: 100%;
  margin-top: 0.25rem;
  font-size: var(--font-size-small);
  color: var(--color-danger);
}

.is-invalid ~ .invalid-feedback {
  display: block;
}

/* Compact form variant */
.form-control-sm {
  padding: 0.4rem 0.5rem;
  font-size: 14px;
  min-height: 32px;
}

/* Range Slider - maintain custom design */
.form-range,
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
  height: 44px;
  padding: 0;
  width: 100%;
}

.form-range::-webkit-slider-track,
input[type="range"]::-webkit-slider-track {
  background: var(--color-border);
  height: 8px;
  border-radius: 4px;
}

.form-range::-webkit-slider-thumb,
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -8px;
  background: var(--color-secondary-teal);
  height: 24px;
  width: 24px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--color-card-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-range::-moz-range-track,
input[type="range"]::-moz-range-track {
  background: var(--color-border);
  height: 8px;
  border-radius: 4px;
}

.form-range::-moz-range-thumb,
input[type="range"]::-moz-range-thumb {
  background: var(--color-secondary-teal);
  height: 24px;
  width: 24px;
  border-radius: 50%;
  border: 2px solid var(--color-card-bg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  cursor: pointer;
}

.form-range:focus,
input[type="range"]:focus {
  outline: none;
}

.form-range:focus::-webkit-slider-thumb,
input[type="range"]:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px rgba(6, 188, 193, 0.1), 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Risk Input Group (Slider + Number) */
.risk-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.risk-input-group .form-range {
  flex: 1;
  height: 36px;
}

.risk-input-group .risk-number {
  width: 80px;
  text-align: center;
  font-weight: 600;
  color: var(--color-secondary-teal);
}

.risk-unit {
  font-weight: 600;
  color: var(--color-secondary-teal);
  min-width: 20px;
}

/* Range Display */
.range-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
}

.range-display input[type="range"] {
  flex: 1;
}

.range-value {
  font-weight: 600;
  color: var(--color-secondary-teal);
  min-width: 60px;
  text-align: right;
}

/* Card Footer */
.card-footer {
  padding: var(--spacing-sm);
  background: linear-gradient(135deg, var(--color-tertiary-light) 0%, #f8f9fa 100%);
  border: 2px solid var(--color-secondary-teal);
  border-radius: var(--border-radius);
  margin: var(--spacing-sm) var(--spacing-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Output Groups */
.output-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.output-group:last-child {
  border-bottom: none;
}

.output-label {
  font-weight: 500;
  color: var(--color-text);
}

.output-value {
  font-weight: 600;
  font-size: var(--font-size-large);
  color: var(--color-primary-dark);
}

/* Risk Indicator */
.risk-indicator {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 500;
  transition: all var(--transition-normal);
}

/* Warning System - Card Border Colors */
.calculator-card.risk-safe {
  border-color: var(--color-safe);
}

.calculator-card.risk-caution {
  border-color: var(--color-caution);
}

.calculator-card.risk-danger {
  border-color: var(--color-danger);
}

/* Risk Indicator Colors */
.risk-indicator.risk-safe {
  background: rgba(6, 188, 193, 0.1);
  color: var(--color-safe);
}

.risk-indicator.risk-caution {
  background: rgba(254, 215, 102, 0.2);
  color: #d4a400;
}

.risk-indicator.risk-danger {
  background: rgba(254, 74, 73, 0.1);
  color: var(--color-danger);
}

/* Text Color Classes for R:R Ratio Display */
.text-safe {
  color: var(--color-safe) !important;
  font-weight: 600;
}

.text-caution {
  color: #d4a400 !important;
  font-weight: 600;
}

.text-danger {
  color: var(--color-danger) !important;
  font-weight: 600;
  animation: pulse-danger 2s ease-in-out infinite;
}

/* Pulse animation for poor R:R ratios */
@keyframes pulse-danger {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* ==========================================
   8. ACTION BUTTONS
   ========================================== */
.action-buttons {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 50;
}

.add-card-btn,
.reset-btn {
  background: var(--color-primary-accent);
  color: white;
  border: none;
  padding: 10px 18px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-normal);
}

.reset-btn {
  background: #6c757d;
}

.add-card-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(254, 74, 73, 0.3);
}

.reset-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(108, 117, 125, 0.4);
  background: #5a6268;
}

.add-card-btn .btn-icon,
.reset-btn .btn-icon {
  font-size: 18px;
  line-height: 1;
}

/* ==========================================
   9. CALCULATOR SELECTOR MODAL
   ========================================== */
.calculator-selector {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(18, 38, 58, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--spacing-md);
}

.calculator-selector.active {
  display: flex;
}

.selector-content {
  background: var(--color-card-bg);
  border-radius: var(--border-radius);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
}

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

.selector-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  border-bottom: 2px solid var(--color-border);
}

.selector-header h2 {
  margin: 0;
}

.btn-close-modal {
  background: none;
  border: none;
  font-size: 32px;
  color: var(--color-text-light);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.btn-close-modal:hover {
  background: var(--color-tertiary-light);
  color: var(--color-danger);
}

/* Calculator Grid */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.calc-type-btn {
  background: var(--color-card-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  min-height: 140px;
}

.calc-type-btn:hover {
  border-color: var(--color-secondary-teal);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.calc-icon {
  font-size: 36px;
}

.calc-name {
  font-weight: 600;
  color: var(--color-primary-dark);
  font-size: var(--font-size-base);
}

.calc-desc {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

/* ==========================================
   10. ABOUT & FAQ SECTIONS
   ========================================== */
.about-section,
.faq-section {
}

.about-section {
  background: var(--color-card-bg);
}

.about-content ul {
  list-style: disc;
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.about-content li {
  margin-bottom: var(--spacing-xs);
}

.faq-item {
  margin-bottom: var(--spacing-lg);
}

.faq-item h3 {
  color: var(--color-primary-dark);
  margin-bottom: var(--spacing-xs);
}

/* ==========================================
   11. FOOTER
   ========================================== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.ad-container {
  max-width: 728px;
  margin: 0 auto var(--spacing-lg);
  min-height: 90px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  display: none;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  padding: var(--spacing-xs);
}

.footer-links a:hover {
  color: var(--color-secondary-teal);
}

.disclaimer {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-small);
  border-left: 4px solid var(--color-secondary-yellow);
}

.disclaimer strong {
  color: var(--color-secondary-yellow);
}

.copyright {
  text-align: center;
  font-size: var(--font-size-small);
  opacity: 0.7;
}

/* ==========================================
   12. ACCESSIBILITY
   ========================================== */
*:focus {
  outline: 2px solid var(--color-secondary-teal);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
  box-shadow: 0 0 0 3px rgba(6, 188, 193, 0.3);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================
   13. RESPONSIVE DESIGN
   ========================================== */

/* Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .calculator-card {
    flex: 0 0 350px;
  }

  .calculator-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  /* Typography */
  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  /* Header */
  .header-content {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .logo {
    text-align: center;
  }

  .main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  /* Card Carousel - Vertical Stack */
  .card-carousel {
    flex-direction: column;
    overflow-x: visible;
    overflow-y: visible;
    padding: var(--spacing-sm);
  }

  .calculator-card {
    flex: 1 1 auto;
    width: 100%;
    margin-bottom: var(--spacing-md);
  }

  /* Action Buttons - FAB Style */
  .action-buttons {
    flex-direction: column-reverse;
    gap: var(--spacing-xs);
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }

  .add-card-btn,
  .reset-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    padding: 0;
    justify-content: center;
  }

  .add-card-btn .btn-text,
  .reset-btn .btn-text {
    display: none;
  }

  .add-card-btn .btn-icon,
  .reset-btn .btn-icon {
    font-size: 22px;
  }

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

  /* Footer */
  .footer-links {
    flex-direction: column;
    text-align: center;
  }
}

/* Extra Small Mobile (< 375px) */
@media (max-width: 374px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
  }

  .card-body {
    padding: var(--spacing-sm);
  }
}

/* ==========================================
   14. PRINT STYLES
   ========================================== */
@media print {
  .site-header,
  .site-footer,
  .action-buttons,
  .calculator-selector,
  .btn-close {
    display: none;
  }

  .calculator-card {
    page-break-inside: avoid;
    box-shadow: none;
    border: 1px solid #000;
  }
}

.form-check-inline {
  margin-right: 1px;
}

.input-group-sm>.btn, .input-group-sm>.form-control, .input-group-sm>.form-select, .input-group-sm>.input-group-text {
  border-radius: 8px;
}

/* ==========================================
   15. PERFORMANCE OPTIMIZATIONS
   ========================================== */
/* Optimize animation performance for animate.css classes */
.animate__animated {
  will-change: transform, opacity;
}

/* Remove will-change after animation completes to save memory */
.animate__animated.animate__fadeInRight,
.animate__animated.animate__fadeOutLeft {
  animation-fill-mode: forwards;
}

/* Optimize card carousel scrolling */
#cardCarousel {
  will-change: scroll-position;
}

/* ==========================================
   16. INCORRECT VALUES LINK
   ========================================== */
.incorrect-values-link {
  color: var(--color-text-light);
  font-size: 0.875rem;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.incorrect-values-link:hover {
  color: var(--color-primary-accent);
  text-decoration: underline;
}
/* ==========================================
   17. LEGAL PAGES (Privacy, Terms, About)
   ========================================== */

.legal-page,
.about-page {
  background: var(--color-bg);
  padding: var(--spacing-xl) 0;
  min-height: 80vh;
}

.legal-page .container,
.about-page .container {
  max-width: 900px;
  background: var(--color-card-bg);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
}

.legal-page h1,
.about-page h1 {
  color: var(--color-primary-dark);
  font-size: var(--font-size-h1);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--color-secondary-teal);
}

.legal-page .last-updated {
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  font-style: italic;
  margin-bottom: var(--spacing-lg);
}

.legal-section,
.about-section {
  margin-bottom: var(--spacing-xl);
}

.legal-section h2,
.about-section h2 {
  color: var(--color-primary-dark);
  font-size: var(--font-size-h2);
  font-weight: 600;
  padding-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.legal-section h3,
.about-section h3 {
  color: var(--color-primary-dark);
  font-size: var(--font-size-h3);
  font-weight: 600;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.legal-section p,
.about-section p {
  color: var(--color-text);
  line-height: 1.7;
  padding-bottom: var(--spacing-md);
}

.legal-section ul,
.about-section ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.legal-section li,
.about-section li {
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--spacing-xs);
}

.legal-section a,
.about-section a {
  color: var(--color-secondary-teal);
  text-decoration: underline;
  transition: color 0.2s ease;
}

.legal-section a:hover,
.about-section a:hover {
  color: var(--color-primary-accent);
}

.legal-section strong,
.about-section strong {
  color: var(--color-primary-dark);
  font-weight: 600;
}

/* Privacy/Terms Summary Boxes */
.privacy-summary,
.terms-summary {
  background: var(--color-tertiary-light);
  border-left: 4px solid var(--color-secondary-teal);
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin: var(--spacing-md) 0;
}

.privacy-summary ul,
.terms-summary ul {
  margin-bottom: 0;
  padding-left: var(--spacing-md);
}

.privacy-summary li,
.terms-summary li {
  list-style: none;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-base);
}

/* Disclaimer Box (About Page) */
.disclaimer-box {
  background: #FFF8E1;
  border: 2px solid var(--color-secondary-yellow);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.disclaimer-box p {
  margin-bottom: var(--spacing-sm);
}

.disclaimer-box p:last-child {
  margin-bottom: 0;
}

/* Mobile Responsive for Legal Pages */
@media (max-width: 768px) {
  .legal-page .container,
  .about-page .container {
    padding: var(--spacing-md);
  }

  .legal-page h1,
  .about-page h1 {
    font-size: 24px;
  }

  .legal-section h2,
  .about-section h2 {
    font-size: 20px;
  }

  .legal-section h3,
  .about-section h3 {
    font-size: 18px;
  }
}