:root {
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #495057;
  --accent-color: #3498db;
  --accent-hover: #2980b9;
  --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  --success-color: #28a745;
  --error-color: #dc3545;
  --border-color: #dee2e6;
  --code-bg: #2c3e50;
  --code-color: #2ecc71;
}

[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #252525;
  --text-primary: #e0e0e0;
  --text-secondary: #aaaaaa;
  --accent-color: #4ab5d3;
  --accent-hover: #4fa8d1;
  --card-shadow: 0 4px 8px rgba(0, 0, 0, 0.089);
  --success-color: #2ecc71;
  --error-color: #ff6b6b;
  --border-color: #333333;
  --code-bg: #0a0a0a;
  --code-color: #2ecc71;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

header {
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  text-align: center;
  border-radius: 8px;
  margin-bottom: 2rem;
  box-shadow: var(--card-shadow);
  position: relative;
}

h1 {
  margin: 0;
  font-size: 2rem;
  color: var(--accent-color);
}

.theme-toggle {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background-color: var(--bg-tertiary);
  border: none;
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: background-color 0.3s;
}

.theme-toggle:hover {
  background-color: var(--border-color);
}

.card {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

h2 {
  color: var(--accent-color);
  margin-top: 0;
}

.ip-display {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--accent-color);
  text-align: center;
  margin: 1rem 0;
  word-break: break-all;
  background-color: var(--bg-tertiary);
  padding: 1rem;
  border-radius: 6px;
}

.loading {
  color: var(--text-secondary);
  text-align: center;
}

.geo-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.geo-item {
  background-color: var(--bg-tertiary);
  padding: 1rem;
  border-radius: 6px;
}

.geo-item h3 {
  margin-top: 0;
  color: var(--accent-color);
  font-size: 1rem;
}

.geo-item p {
  margin-bottom: 0;
  font-size: 1.2rem;
  color: var(--text-primary);
}

.binary-display {
  font-family: monospace;
  padding: 1rem;
  background-color: var(--code-bg);
  color: var(--code-color);
  border-radius: 6px;
  overflow-x: auto;
  white-space: nowrap;
  margin-top: 1rem;
}

.copy-btn {
  background-color: var(--accent-color);
  color: #ffffff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  margin-top: 1rem;
  transition: background-color 0.3s;
  font-weight: bold;
}

.copy-btn:hover {
  background-color: var(--accent-hover);
}

.connection-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.system-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.info-card {
  background-color: var(--bg-tertiary);
  border-radius: 6px;
  padding: 1rem;
  text-align: center;
}

.info-card h4 {
  margin-top: 0;
  color: var(--accent-color);
}

.info-value {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-primary);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 0.5s;
}

.error-message {
  color: var(--error-color);
}

.small-font {
  font-size: 0.7em;
}