:root {
  --primary-color: #6d28d9;
  --primary-dark: #5b21b6;
  --secondary-color: #7c3aed;
  --text-color: #e2e8f0;
  --text-dark: #1e293b;
  --light-gray: #1e293b;
  --medium-gray: #334155;
  --dark-gray: #64748b;
  --white: #ffffff;
  --black: #0f172a;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --border-radius: 10px;
  --transition: all 0.3s ease;
}

[data-theme="light"] {
  --primary-color: #6d28d9;
  --primary-dark: #5b21b6;
  --secondary-color: #7c3aed;
  --text-color: #1e293b;
  --text-dark: #1e293b;
  --light-gray: #f8fafc;
  --medium-gray: #e2e8f0;
  --dark-gray: #94a3b8;
  --white: #ffffff;
  --black: #0f172a;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--black);
  padding: 20px;
  transition: var(--transition);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

header {
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--primary-color);
  color: var(--white);
  transition: var(--transition);
}

.header-content {
  flex: 1;
}

header h1 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.subtitle {
  font-size: 0.95rem;
  opacity: 0.9;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.calculator {
  padding: 25px;
}

.input-section {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 20px;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.input-group {
  margin-bottom: 10px;
}

.input-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-color);
}

.input-group input,
.input-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--dark-gray);
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  background-color: var(--medium-gray);
  color: var(--text-color);
  transition: var(--transition);
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(109, 40, 217, 0.2);
}

.search-container {
  position: relative;
}

#model-search {
  width: 100%;
  margin-bottom: 5px;
}

#model-select {
  width: 100%;
  max-height: 200px;
  overflow-y: auto;
  border-radius: var(--border-radius);
  background-color: var(--medium-gray);
  color: var(--text-color);
  border: 1px solid var(--dark-gray);
}

#model-select option {
  padding: 8px 12px;
}

#model-select option:hover {
  background-color: var(--primary-color);
}

.calculate-btn {
  width: 100%;
  padding: 14px;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.calculate-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 1.2rem;
}

.results-section {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 15px;
  margin-top: 25px;
}

.result-card {
  padding: 15px;
  background-color: var(--medium-gray);
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
}

.result-card h3 {
  font-size: 0.85rem;
  margin-bottom: 10px;
  color: var(--text-color);
}

.result-value {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 5px;
}

.result-detail {
  font-size: 0.7rem;
  color: var(--dark-gray);
}

.result-card.total {
  background-color: var(--primary-color);
  color: var(--white);
}

.result-card.total h3 {
  color: var(--white);
}

.advanced-options {
  margin-top: 10px;
}

details {
  margin-bottom: 15px;
  border: 1px solid var(--dark-gray);
  border-radius: var(--border-radius);
  padding: 10px;
  background-color: var(--medium-gray);
  transition: var(--transition);
}

details summary {
  font-weight: 600;
  cursor: pointer;
  outline: none;
  padding: 5px;
}

details[open] {
  padding-bottom: 15px;
}

.advanced-content {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--dark-gray);
}

.info-section {
  padding: 0 25px 25px;
}

.info-content {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--dark-gray);
}

.info-content h4 {
  margin: 15px 0 5px;
  font-size: 0.9rem;
}

.info-content p {
  margin-bottom: 8px;
  font-size: 0.85rem;
  line-height: 1.5;
}

.note {
  font-size: 0.8rem;
  color: var(--dark-gray);
  text-align: center;
  margin-top: 15px;
}

@media (max-width: 768px) {
  .input-row {
    grid-template-columns: 1fr;
  }
  
  .results-section {
    grid-template-columns: 1fr 1fr;
  }
  
  header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .theme-toggle {
    align-self: flex-end;
    margin-top: -45px;
  }
}

@media (max-width: 480px) {
  .results-section {
    grid-template-columns: 1fr;
  }
  
  body {
    padding: 10px;
  }
}