* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: 
    linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%),
    url('https://images.unsplash.com/photo-1611974789855-9c2a0a7236a3?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80'),
    url('https://images.unsplash.com/photo-1590283603385-17ffb3a7f29f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80'),
    url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
  background-size: cover, cover, cover, cover;
  background-position: center, top left, top right, bottom center;
  background-blend-mode: overlay, normal, normal, normal;
  background-attachment: fixed;
  min-height: 100vh;
  color: #333;
  line-height: 1.6;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  pointer-events: none;
  z-index: -1;
}

/* Floating stock market elements */
.floating-elements {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.floating-element {
  position: absolute;
  color: rgba(255, 255, 255, 0.1);
  font-size: 12px;
  font-weight: bold;
  animation: float 20s infinite linear;
  user-select: none;
}

.floating-element:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.floating-element:nth-child(2) { top: 20%; left: 80%; animation-delay: 2s; }
.floating-element:nth-child(3) { top: 30%; left: 20%; animation-delay: 4s; }
.floating-element:nth-child(4) { top: 40%; left: 70%; animation-delay: 6s; }
.floating-element:nth-child(5) { top: 50%; left: 15%; animation-delay: 8s; }
.floating-element:nth-child(6) { top: 60%; left: 85%; animation-delay: 10s; }
.floating-element:nth-child(7) { top: 70%; left: 25%; animation-delay: 12s; }
.floating-element:nth-child(8) { top: 80%; left: 75%; animation-delay: 14s; }
.floating-element:nth-child(9) { top: 90%; left: 5%; animation-delay: 16s; }
.floating-element:nth-child(10) { top: 5%; left: 50%; animation-delay: 18s; }

@keyframes float {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

/* Stock chart patterns */
.stock-pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.03;
}

.stock-pattern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><path d="M0,100 Q50,50 100,100 T200,100" stroke="white" stroke-width="1" fill="none"/><path d="M0,120 Q50,80 100,120 T200,120" stroke="white" stroke-width="1" fill="none"/><path d="M0,80 Q50,120 100,80 T200,80" stroke="white" stroke-width="1" fill="none"/></svg>');
  background-size: 200px 200px;
  animation: chartMove 30s infinite linear;
}

@keyframes chartMove {
  0% { transform: translateX(-200px); }
  100% { transform: translateX(100vw); }
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #fff;
  font-size: 2.5rem;
  font-weight: 700;
  text-shadow: 
    0 2px 4px rgba(0,0,0,0.3),
    0 0 20px rgba(255,255,255,0.3);
  background: linear-gradient(45deg, #fff, #e3f2fd, #fff);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease-in-out infinite;
  position: relative;
}

h1::after {
  content: '📈';
  position: absolute;
  top: -10px;
  right: -20px;
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

.card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 24px;
  border-radius: 16px;
  margin-bottom: 20px;
  box-shadow: 
    0 8px 32px rgba(0,0,0,0.1),
    0 0 0 1px rgba(255,255,255,0.1),
    inset 0 1px 0 rgba(255,255,255,0.2);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title::before {
  content: '📊';
  font-size: 1.2em;
}

.file-upload-section {
  background: linear-gradient(135deg, #f8f9ff 0%, #e8f2ff 100%);
  border: 2px dashed #667eea;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  margin-bottom: 16px;
  transition: all 0.3s ease;
}

.file-upload-section:hover {
  border-color: #764ba2;
  background: linear-gradient(135deg, #f0f4ff 0%, #e0edff 100%);
}

.file-input {
  display: none;
}

.file-input-label {
  display: inline-block;
  padding: 12px 24px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.file-input-label:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.file-name {
  margin-top: 8px;
  font-size: 14px;
  color: #666;
  font-style: italic;
}

.or-divider {
  text-align: center;
  margin: 16px 0;
  position: relative;
  color: #666;
  font-size: 14px;
}

.or-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #ddd, transparent);
}

.or-divider span {
  background: rgba(255, 255, 255, 0.95);
  padding: 0 16px;
  position: relative;
}

input[type="text"], textarea {
  width: 100%;
  padding: 12px 16px;
  margin-top: 8px;
  border: 2px solid #e1e5e9;
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.3s ease;
  background: #fff;
}

input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

textarea {
  resize: vertical;
  min-height: 100px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

.button-group {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

button {
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

button:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: linear-gradient(135deg, #f093fb, #f5576c);
  color: white;
  box-shadow: 0 4px 15px rgba(240, 147, 251, 0.3);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 147, 251, 0.4);
}

.results-section {
  background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  border-left: 4px solid #667eea;
}

.portfolio-summary {
  background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  border: 1px solid rgba(102, 126, 234, 0.2);
}

.portfolio-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  margin-bottom: 12px;
}

.stat-item {
  text-align: center;
  padding: 12px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: #667eea;
  display: block;
}

.stat-label {
  font-size: 0.875rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: #667eea;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 12px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.error-message {
  background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%);
  border: 1px solid #f44336;
  border-radius: 8px;
  padding: 16px;
  color: #c62828;
  margin-bottom: 16px;
}

.demo-mode {
  background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
  border: 1px solid #ffc107;
  border-radius: 8px;
  padding: 16px;
  color: #856404;
  margin-top: 12px;
}

pre {
  white-space: pre-wrap;
  background: #2c3e50;
  color: #ecf0f1;
  padding: 20px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  overflow-x: auto;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.billing-info {
  background: linear-gradient(135deg, #e8f5e8 0%, #f1f8e9 100%);
  border: 1px solid #4caf50;
  border-radius: 8px;
  padding: 16px;
  color: #2e7d32;
}

.usage-summary {
  background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
  border: 1px solid #9c27b0;
  border-radius: 8px;
  padding: 16px;
  color: #4a148c;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .card {
    padding: 16px;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .portfolio-stats {
    grid-template-columns: 1fr;
  }
}

/* Animation for card entrance */
@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: slideInUp 0.6s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #5a6fd8, #6a4190);
}