:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-primary: #6366f1;
  --accent-hover: #818cf8;
  --border-color: #334155;
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  --success: #22c55e;
  --border-radius-sm: 6px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.1) 0px, transparent 50%);
  background-attachment: fixed;
}

.app-container {
  width: 100%;
  max-width: 1000px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

header {
  text-align: center;
  margin-bottom: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-primary), #a855f7);
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(to right, #fff, #94a3b8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.025em;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

main {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.search-panel, .results-panel {
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.search-bar input {
  width: 100%;
  padding: 1.25rem 1.5rem;
  font-size: 1.1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.search-bar input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
  align-items: flex-end;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

select, .price-inputs input {
  padding: 0.875rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.2em;
  padding-right: 2.5rem;
}

select:focus, .price-inputs input:focus {
  border-color: var(--accent-hover);
}

.price-inputs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.price-inputs input {
  width: 100%;
}

.primary-btn {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: white;
  border: none;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: var(--transition);
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -10px rgba(99, 102, 241, 0.6);
  background: linear-gradient(135deg, var(--accent-hover), #6366f1);
}

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

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.results-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.badge {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-hover);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
}

.table-container {
  overflow-x: auto;
  min-height: 200px;
  position: relative;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

th, td {
  padding: 1rem 1.5rem;
  text-align: left;
}

th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
}

td {
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  transition: var(--transition);
}

tr+tr:hover td {
  background: rgba(51, 65, 85, 0.3);
}

tbody tr {
  animation: fadeIn 0.4s ease forwards;
  opacity: 0;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.price-cell {
  font-family: 'Inter', monospace;
  font-weight: 600;
  color: #10b981;
}

.category-pill {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.hidden {
  display: none !important;
}

.empty-state, .loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(99, 102, 241, 0.2);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: 1rem;
}

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

.alert {
  padding: 1rem;
  border-radius: var(--border-radius-sm);
  background: var(--error-bg);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.2);
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  .filters {
    grid-template-columns: 1fr;
  }
  
  .price-inputs input {
    width: 100%;
  }
}