/* Import Inter font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');

:root {
  /* Color Palette */
  --primary: #667eea;
  --primary-dark: #5568d3;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --success: #10b981;
  --error: #ef4444;
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --bg-white: #ffffff;
  --bg-subtle: #f9fafb;
  --border-light: #e5e7eb;
  --border-focus: #667eea;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.12);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Transitions */
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', system-ui, sans-serif;
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 400;
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background: var(--bg-white);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* Video Background */
.video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  object-fit: cover;
  opacity: 0.3;
  filter: blur(3px) brightness(0.7);
  transition: opacity 1s ease-in-out;
  pointer-events: none;
}

.video-background.loaded {
  opacity: 0.3;
}

/* Hide video on mobile devices to save bandwidth */
@media (max-width: 768px) {
  .video-background {
    display: none;
  }

  /* Add gradient background for mobile instead */
  body::before {
    background:
      linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
      linear-gradient(225deg, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
  }

  body::after {
    background:
      radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.12) 0%, transparent 25%),
      radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.12) 0%, transparent 25%),
      radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.06) 0%, transparent 50%);
  }
}

/* Animated Gradient Background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, transparent 50%),
    linear-gradient(225deg, rgba(118, 75, 162, 0.05) 0%, transparent 50%);
  animation: gradientShift 15s ease infinite;
  pointer-events: none;
  z-index: 1;
}

body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.08) 0%, transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.08) 0%, transparent 25%),
    radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.03) 0%, transparent 50%);
  animation: rotate 60s linear infinite;
  pointer-events: none;
  z-index: 1;
}

@keyframes gradientShift {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
}

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

/* Geometric Elements */
.geometric-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.shape {
  position: absolute;
  opacity: 0.03;
  animation: float 20s ease-in-out infinite;
}

.shape-1 {
  width: 300px;
  height: 300px;
  border: 2px solid var(--primary);
  border-radius: 50%;
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 200px;
  height: 200px;
  border: 2px solid var(--primary-dark);
  border-radius: 30%;
  top: 60%;
  right: 15%;
  animation-delay: 5s;
}

.shape-3 {
  width: 150px;
  height: 150px;
  background: linear-gradient(135deg, var(--primary), transparent);
  border-radius: 20%;
  bottom: 20%;
  left: 20%;
  animation-delay: 10s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-30px) rotate(5deg);
  }
  50% {
    transform: translateY(-60px) rotate(-5deg);
  }
  75% {
    transform: translateY(-30px) rotate(3deg);
  }
}

/* Welcome Screen */
.welcome-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.welcome-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.welcome-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.welcome-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.welcome-line {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 300;
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.welcome-line:first-child {
  animation-delay: 0.3s;
}

.welcome-brand {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  animation-delay: 0.8s;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Main App */
.main-app {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  position: relative;
}

.main-app.visible {
  opacity: 1;
}

.app-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
}

/* Navigation Buttons */
.nav-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.back-btn {
  width: 100%;
  height: 48px;
  padding: 0 32px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-family);
  background: transparent;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.back-btn.hidden {
  display: none;
}

.back-btn:hover {
  background: var(--bg-subtle);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

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

.back-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: var(--transition-fast);
}

.back-btn:hover svg {
  transform: translateX(-2px);
}

.back-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Question Sections */
.question-section {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  display: none;
}

.question-section.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  display: block;
  animation: slideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.question-content {
  background: var(--bg-white);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 60px 50px;
  box-shadow: var(--shadow-md);
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-base);
}

.question-content:hover {
  box-shadow: var(--shadow-lg);
}

.question-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
}

.question-hint {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
  line-height: var(--line-height-normal);
}

.question-hint a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition-fast);
}

.question-hint a:hover {
  border-bottom-color: var(--primary);
}

.input-wrapper {
  margin-top: auto;
}

/* Large Input */
.large-input {
  width: 100%;
  padding: 16px 20px;
  font-size: 18px;
  font-weight: 400;
  font-family: var(--font-family);
  background: var(--bg-white);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-base);
  margin-bottom: 20px;
}

.large-input::placeholder {
  color: var(--text-muted);
}

.large-input:hover {
  border-color: var(--primary);
}

.large-input:focus {
  background: var(--bg-white);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.large-input:invalid {
  border-color: var(--error);
}

.large-input:invalid:focus {
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

/* Input Hint */
.input-hint {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 12px 0 24px 0;
  text-align: center;
  line-height: 1.4;
  display: block;
}

.input-hint.error {
  color: var(--error);
  font-weight: 600;
}

/* Amount Input Group */
.amount-input-group {
  position: relative;
  margin-bottom: 20px;
}

.currency-display {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-secondary);
  pointer-events: none;
}

.amount-input-group .large-input {
  padding-left: 60px;
  margin-bottom: 0;
  font-size: 24px;
  font-weight: 600;
}

/* Currency Options */
.currency-options,
.action-options,
.method-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.currency-option,
.action-option,
.method-option {
  background: var(--bg-white);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  min-height: 80px;
  overflow: visible;
}

.currency-option:hover,
.action-option:hover,
.method-option:hover {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(102, 126, 234, 0.18);
}

.currency-option:hover .currency-symbol {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
  transform: scale(1.05);
}

.currency-option:active,
.action-option:active,
.method-option:active {
  transform: translateY(0);
}

.currency-option input[type="radio"],
.action-option input[type="radio"],
.method-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.currency-option:has(input[type="radio"]:checked),
.action-option:has(input[type="radio"]:checked),
.method-option:has(input[type="radio"]:checked) {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border-color: var(--primary);
  border-width: 3px;
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.25);
  padding: 21px 27px;
}

.currency-label {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-primary);
  transition: var(--transition-fast);
  flex: 1;
  min-width: 0;
}

.action-content,
.method-content {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--text-primary);
  transition: var(--transition-fast);
  width: 100%;
}

.currency-option:has(input[type="radio"]:checked) .currency-label,
.action-option:has(input[type="radio"]:checked) .action-content,
.method-option:has(input[type="radio"]:checked) .method-info {
  color: var(--primary);
}

.currency-option:has(input[type="radio"]:checked) .currency-symbol {
  color: var(--bg-white);
  background: var(--primary-gradient);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.currency-option:has(input[type="radio"]:checked) .currency-name {
  color: var(--primary);
  font-weight: 700;
}

.currency-symbol {
  font-size: 32px;
  font-weight: 700;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: var(--transition-base);
  font-family: 'Segoe UI', 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', 'Android Emoji', Arial, sans-serif !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.currency-name {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
/* Disabled Currency Options */
.currency-option.disabled {
  position: relative;
  opacity: 0.65;
  cursor: not-allowed;
  background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
  border: 2px solid #e8e8e8;
  pointer-events: none;
  overflow: hidden;
}

.currency-option.disabled::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: disabledShimmer 3s infinite;
  z-index: 1;
  pointer-events: none;
}

@keyframes disabledShimmer {
  0% {
    left: -100%;
  }
  50%, 100% {
    left: 100%;
  }
}

.currency-option.disabled:hover {
  background: linear-gradient(135deg, #fafafa 0%, #f5f5f5 100%);
  border-color: #e8e8e8;
  transform: none;
  box-shadow: none;
}

.currency-option.disabled .currency-label {
  color: #a0a0a0;
  filter: grayscale(0.5);
  position: relative;
  z-index: 2;
}

.currency-option.disabled .currency-symbol {
  background: linear-gradient(135deg, #f0f0f0 0%, #e8e8e8 100%);
  color: #c0c0c0;
  opacity: 0.7;
  transform: none;
}

.currency-option.disabled .currency-name {
  color: #a0a0a0;
  font-weight: 500;
}

/* Coming Soon Badge - Premium Design */
.coming-soon-badge {
  position: absolute;
  top: 50%;
  right: 24px;
  transform: translateY(-50%);
  padding: 8px 16px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  background: var(--primary-gradient);
  color: white;
  border-radius: 24px;
  box-shadow:
    0 4px 16px rgba(102, 126, 234, 0.4),
    0 2px 6px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  z-index: 10;
  animation: badgePulse 3s ease-in-out infinite;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
  white-space: nowrap;
}

.coming-soon-badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.4) 0%, transparent 50%);
  border-radius: 24px;
  opacity: 0;
  animation: badgeShine 2.5s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% {
    transform: translateY(-50%) scale(1);
    box-shadow:
      0 4px 16px rgba(102, 126, 234, 0.4),
      0 2px 6px rgba(0, 0, 0, 0.1);
  }
  50% {
    transform: translateY(-50%) scale(1.03);
    box-shadow:
      0 6px 20px rgba(102, 126, 234, 0.5),
      0 3px 8px rgba(0, 0, 0, 0.15);
  }
}

@keyframes badgeShine {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}


/* Action Options */
.action-content {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.action-title {
  font-size: 20px;
  font-weight: 600;
}

.action-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Method Options */
.method-content {
  gap: 20px;
}

.method-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: var(--shadow-xs);
}

.method-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.method-title {
  font-size: 20px;
  font-weight: 600;
}

.method-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Summary Box */
.summary-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 20px;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-light);
}

.summary-item:last-child {
  border-bottom: none;
}

.summary-item.invoice-only {
  display: none;
}

.summary-item.invoice-only.visible {
  display: flex;
}

.summary-label {
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 400;
}

.summary-value {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 600;
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

/* Continue Button */
.continue-btn {
  width: 100%;
  height: 48px;
  padding: 0 32px;
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-family);
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: var(--bg-white);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.continue-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.continue-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.continue-btn:active::before {
  width: 300px;
  height: 300px;
}

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

.continue-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.continue-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Submit Message */
.submit-message {
  text-align: center;
  margin-bottom: 16px;
  font-size: 16px;
  color: var(--text-secondary);
  min-height: 24px;
  line-height: var(--line-height-normal);
}

.submit-message a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition-fast);
}

.submit-message a:hover {
  border-bottom-color: var(--primary);
}

/* Accessibility */
.continue-btn:focus-visible,
.large-input:focus-visible,
.currency-option:focus-within,
.action-option:focus-within,
.method-option:focus-within {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Loading State */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Responsive Design - Mobile First */
@media (max-width: 640px) {
  .question-content {
    padding: 32px 24px;
    min-height: 320px;
  }

  .question-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
  }

  .question-hint {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .large-input {
    padding: 14px 16px;
    font-size: 16px;
  }

  .amount-input-group .large-input {
    padding-left: 50px;
    font-size: 20px;
  }

  .currency-display {
    left: 16px;
    font-size: 18px;
  }

  .currency-option,
  .action-option,
  .method-option {
    padding: 18px 20px;
    min-height: 72px;
  }

  .currency-symbol {
    font-size: 28px;
    width: 48px;
    height: 48px;
  }

  .currency-name {
    font-size: 16px;
  }

  .currency-label {
    gap: 16px;
  }

  .coming-soon-badge {
    padding: 6px 12px;
    font-size: 10px;
    right: 16px;
  }

  .currency-option:has(input[type="radio"]:checked) {
    padding: 17px 19px;
  }

  .action-title,
  .method-title {
    font-size: 18px;
  }

  .summary-box {
    padding: 20px;
  }

  .summary-label,
  .summary-value {
    font-size: 14px;
  }
}

@media (min-width: 641px) and (max-width: 768px) {
  .question-content {
    padding: 48px 36px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .app-container {
    max-width: 720px;
  }
}

@media (min-width: 1025px) {
  .app-container {
    max-width: 800px;
  }

  .question-content:hover {
    transform: translateY(-4px);
  }
}

/* Print Styles */
@media print {
  .welcome-screen {
    display: none;
  }

  .main-app {
    padding: 0;
  }

  .question-content {
    box-shadow: none;
    border: 1px solid #000;
  }
}

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

/* Footer */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-light);
  padding: 16px 20px;
  text-align: center;
  z-index: 100;
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.footer-copyright {
  font-weight: 500;
}

.footer-support {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-support a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition-fast);
  font-weight: 500;
}

.footer-support a:hover {
  border-bottom-color: var(--primary);
}

@media (min-width: 640px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (max-width: 639px) {
  .footer {
    padding: 12px 16px;
    font-size: 12px;
  }
}