:root {
  --primary-color: #2952cc;
  --text-color: #333;
  --muted-color: #666;
  --border-color: #eee;
  --border-color-light: #f0f0f0;
  --bg-color: #f5f5f5;
  --card-bg: white;

  
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-segment: 0.75rem;
  
  --border-radius: 12px;
  --border-radius-lg: 16px;
  
  --font-size-sm: 0.85rem;
  --font-size-md: 0.9rem;
  --font-size-lg: 1.1rem;
  --font-size-xl: 1.8rem;
  --font-size-title: 2.5rem;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  
  --animation-duration-fast: 1.5s;
  --animation-duration-slow: 3s;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-color);
  min-height: 100vh;
  padding: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}

.logo {
  font-family: Impact, sans-serif;
  font-size: var(--font-size-title);
  color: var(--primary-color);
  position: absolute;
  top: var(--spacing-lg);
  left: var(--spacing-lg);
}

.content {
  max-width: 550px;
  width: 100%;
  margin-top: 8rem;
}

.title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.description {
  font-size: var(--font-size-lg);
  color: var(--text-color);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.btn {
  width: 100%;
  padding: 16px 24px;
  background: #e8e8e8;
  color: black;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.btn:hover {
  background: #ddd;
  border-color: #ccc;
}

.google-logo {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.disclaimer {
  font-size: var(--font-size-md);
  color: var(--muted-color);
  margin-top: var(--spacing-sm);
}

.loading {
  text-align: center;
  padding: var(--spacing-xl) 0;
  display: none;
}

.loading-text {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
}



.flight-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.card-header {
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-lg);
}

.passenger-info {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-normal);
  color: var(--muted-color);
  margin-top: var(--spacing-xs);
}

.route-info {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-color);
  margin-top: var(--spacing-xs);
}

.date-info {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-normal);
  color: var(--muted-color);
  margin-top: var(--spacing-xs);
}


.flight-segment {
  margin-bottom: var(--spacing-sm);
}

.segment-airline {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-md);
  color: var(--primary-color);
  margin-bottom: var(--spacing-segment);
}

.flight-details {
  display: grid;
  grid-template-columns: max-content 1fr 1fr;
  gap: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.detail-label {
  font-weight: var(--font-weight-semibold);
  color: var(--muted-color);
}

.detail-airport {
  font-weight: var(--font-weight-medium);
  color: var(--text-color);
}

.detail-time {
  color: var(--muted-color);
}

/* Loading Animation */
#loading {
  text-align: center;
  width: 150px;
  height: 150px;
  margin: 0 auto;
  position: relative;
  background: url('/images/gmail.svg') no-repeat center / contain;
}

.dazzling-animation {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
}

.scanning-line {
  position: absolute;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, transparent 0%, #0066ff 20%, #00aaff 50%, #0066ff 80%, transparent 100%);
  animation: scan-vertical var(--animation-duration-slow) ease-in-out infinite;
  top: 0;
  transform: translateY(-4px);
}

.sparkle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: #0088ff;
  animation: sparkle-star var(--animation-duration-fast) infinite ease-out;
  box-shadow: 0 0 10px #0088ff;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

.sparkle:nth-child(2) { top: 10%; left: 15%; animation-delay: 0s; }
.sparkle:nth-child(3) { top: 25%; left: 65%; animation-delay: 0.2s; }
.sparkle:nth-child(4) { top: 40%; left: 35%; animation-delay: 0.4s; }
.sparkle:nth-child(5) { top: 55%; left: 80%; animation-delay: 0.6s; }
.sparkle:nth-child(6) { top: 70%; left: 25%; animation-delay: 0.8s; }
.sparkle:nth-child(7) { top: 85%; left: 70%; animation-delay: 1s; }
.sparkle:nth-child(8) { top: 20%; left: 50%; animation-delay: 0.1s; }
.sparkle:nth-child(9) { top: 35%; left: 85%; animation-delay: 0.3s; }
.sparkle:nth-child(10) { top: 50%; left: 10%; animation-delay: 0.5s; }
.sparkle:nth-child(11) { top: 65%; left: 90%; animation-delay: 0.7s; }
.sparkle:nth-child(12) { top: 80%; left: 40%; animation-delay: 0.9s; }

@keyframes scan-vertical {
  0%, 100% { transform: translateY(40px); opacity: 0; }
  25%, 75% { opacity: 1; }
  50% { transform: translateY(360px); opacity: 0; }
}

@keyframes sparkle-star {
  0%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
  50% { opacity: 1; transform: scale(1) rotate(180deg); }
}

/* Result States */
.no-results {
  text-align: center;
}

.success-emoji {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.success-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.success-message {
  color: var(--text-color);
}



.user-form-section {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.form-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.form-description {
  font-size: var(--font-size-md);
  color: var(--text-color);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.user-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-label {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--text-color);
}

.form-input {
  padding: 12px 16px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--font-size-md);
  transition: border-color 0.3s ease;
  background: white;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-input:disabled {
  background: var(--bg-color);
  color: var(--muted-color);
  cursor: not-allowed;
}

.form-submit-btn {
  margin-top: var(--spacing-sm);
}

.form-submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-error {
  background: #fee;
  border: 1px solid #fcc;
  border-radius: var(--border-radius);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  color: #c33;
  font-size: var(--font-size-sm);
}

.success-message {
  text-align: center;
  padding: var(--spacing-lg);
}

.success-message .success-emoji {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

/* Mobile Styles */
@media (max-width: 768px) {
  body {
    padding: 15px;
    padding-top: 28vh;
  }

  .logo {
    font-size: 1.8rem;
    top: var(--spacing-md);
    left: var(--spacing-md);
  }

  .content {
    margin-top: 0;
  }

  .title {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    line-height: 1.2;
  }

  .description {
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
  }

  .btn {
    min-height: 48px;
    padding: 18px 24px;
  }

  .disclaimer {
    margin-top: 1.2rem;
    font-size: var(--font-size-sm);
  }

  .loading {
    padding: 2.5rem 0;
  }

  .flight-details {
    grid-template-columns: max-content 1fr;
    gap: var(--spacing-xs) var(--spacing-sm);
  }

  .detail-time {
    grid-column: 2;
    font-size: var(--font-size-sm);
  }

  .user-form-section {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
  }

  .form-title {
    font-size: var(--font-size-md);
  }

  .form-description {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 480px) {
  body {
    padding-top: 22vh;
  }

  .logo {
    font-size: 1.6rem;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
  }

  .title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
  }

  .description {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-md);
  }

  .btn {
    padding: 16px 20px;
  }

  .disclaimer {
    font-size: 0.8rem;
  }

  .user-form-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
  }

  .form-title {
    font-size: var(--font-size-md);
  }

  .form-description {
    font-size: var(--font-size-sm);
  }

  .form-input {
    padding: 10px 14px;
  }
}