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

:root {
  /* Palette: #191726, #5D7173, #B4BEBF, #027368, #F2F2F2 */
  --primary-color: #027368; /* teal */
  --primary-dark: #191726;  /* deep dark */
  --secondary-color: #5D7173; /* gray-teal */
  --accent-color: #B4BEBF;   /* light gray */
  --success-color: #027368;  /* align with primary */
  --bg-light: #F2F2F2;
  --bg-light-secondary: #FFFFFF;
  --bg-dark: #191726;
  --bg-dark-secondary: #5D7173;
  --text-light: #191726;
  --text-light-secondary: #5D7173;
  --border-light: #B4BEBF;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-light);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

html[data-theme="dark"] {
  background-color: var(--bg-dark);
}

html[data-theme="dark"] body {
  background-color: var(--bg-dark);
  color: #F2F2F2;
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  padding: 1rem 0;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.logo-img {
  height: 32px;
  width: 32px;
  border-radius: 6px;
  object-fit: contain;
}

.logo h1 {
  font-size: 1.5rem;
  margin: 0;
}

.theme-switcher {
  display: flex;
  gap: 0.5rem;
}

.theme-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  padding: 0.5rem;
  border-radius: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  font-size: 0.875rem;
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* Main Content */
.main-content {
  min-height: calc(100vh - 200px);
  padding-bottom: 100px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  padding: 4rem 2rem;
  text-align: center;
  margin-bottom: 3rem;
}

.hero-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-light-secondary);
  max-width: 600px;
  margin: 0 auto;
}

html[data-theme="dark"] .hero-content p {
  color: #9ca3af;
}

/* Search Section */
.search-section {
  padding: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.search-container {
  background: var(--bg-light);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
}

html[data-theme="dark"] .search-container {
  background: var(--bg-dark-secondary);
}

.search-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  gap: 1rem;
}

.ip-input {
  flex: 1;
  padding: 1rem;
  border: 2px solid var(--border-light);
  border-radius: 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background-color: var(--bg-light-secondary);
  color: var(--text-light);
}

html[data-theme="dark"] .ip-input {
  background-color: var(--bg-dark);
  border-color: #374151;
  color: #F2F2F2;
}

.ip-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

html[data-theme="dark"] .ip-input:focus {
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.3);
}

.ip-input::placeholder {
  color: var(--text-light-secondary);
}

html[data-theme="dark"] .ip-input::placeholder {
  color: #9ca3af;
}

/* Buttons */
.btn {
  padding: 1rem 2rem;
  border: none;
  border-radius: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
  background: var(--bg-light-secondary);
  color: var(--text-light);
  border: 2px solid var(--border-light);
}

html[data-theme="dark"] .btn-secondary {
  background: var(--bg-dark);
  color: #F2F2F2;
  border-color: #374151;
}

.btn-secondary:hover {
  background: var(--border-light);
  transform: translateY(-2px);
}

html[data-theme="dark"] .btn-secondary:hover {
  background: #374151;
}

.btn-icon {
  font-size: 1.1rem;
}

/* Output */
.output-container {
  min-height: 50px;
}

#output {
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  animation: slideIn 0.3s ease;
}

html[data-theme="dark"] #output {
  background: transparent;
  border-color: transparent;
}

#output p {
  margin: 0.5rem 0;
  font-size: 0.95rem;
}

#output strong {
  color: var(--primary-color);
}

html[data-theme="dark"] #output strong {
  color: #60a5fa;
}

/* Card result styles */
.result-card {
  background: var(--bg-light-secondary);
  border: 2px solid var(--border-light);
  border-radius: 1rem;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}

html[data-theme="dark"] .result-card {
  background: var(--bg-dark);
  border-color: #374151;
}

.result-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: #fff;
}

.result-card__title {
  font-size: 1.1rem;
  font-weight: 700;
}

.badge {
  background: rgba(255,255,255,0.2);
  color: #fff;
  padding: 0.25rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.8rem;
  white-space: nowrap;
}

.result-card__body {
  padding: 1.25rem;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

@media (max-width: 640px) {
  .result-grid {
    grid-template-columns: 1fr;
  }
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem;
  border-radius: 0.75rem;
  background: var(--bg-light);
}

html[data-theme="dark"] .result-item {
  background: var(--bg-dark-secondary);
}

.result-label {
  font-size: 0.8rem;
  color: var(--text-light-secondary);
}

html[data-theme="dark"] .result-label {
  color: #9ca3af;
}

.result-value {
  font-weight: 600;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.6rem;
  border-radius: 1rem;
  background: var(--accent-color);
  color: var(--text-light);
  font-size: 0.85rem;
}

html[data-theme="dark"] .chip {
  color: #191726;
}

.map-link {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--primary-color);
  text-decoration: underline;
}

html[data-theme="dark"] .map-link {
  color: #60a5fa;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
.footer {
  background: var(--bg-light-secondary);
  border-top: 1px solid var(--border-light);
  padding: 2rem;
  margin-top: 3rem;
  position: relative;
}

html[data-theme="dark"] .footer {
  background: var(--bg-dark-secondary);
  border-color: #374151;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.footer-links a {
  color: var(--text-light-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-light);
  transition: all 0.3s ease;
}

html[data-theme="dark"] .footer-links a {
  background: var(--bg-dark);
  color: #d1d5db;
}

.footer-links a:hover {
  color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

html[data-theme="dark"] .footer-links a:hover {
  color: #60a5fa;
}

.copyright {
  color: var(--text-light-secondary);
  font-size: 0.9rem;
}

html[data-theme="dark"] .copyright {
  color: #9ca3af;
}

/* Responsive */
@media (max-width: 768px) {
  .logo h1 {
    display: none;
  }

  .navbar {
    padding: 0 1rem;
  }

  .hero-content h2 {
    font-size: 1.75rem;
  }

  .hero {
    padding: 2rem 1rem;
  }

  .search-section {
    padding: 1rem;
  }

  .search-container {
    padding: 1.5rem;
  }

  .input-group {
    flex-direction: column;
    gap: 0.75rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
  }

  .footer-content {
    gap: 1rem;
  }

  .copyright {
    font-size: 0.8rem;
  }
}