:root {
  --bg-color: #f0f2f5;
  --card-bg: #ffffff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --accent-color: #3b82f6;
  --hover-shadow:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #1a1b1e;
    --card-bg: #25262b;
    --text-primary: #e4e5e7;
    --text-secondary: #909296;
    --accent-color: #5c7cfa;
  }
}

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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  padding: 20px;
  min-height: 100vh;
}

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

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  padding: 20px 0;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Toggle Switch */
.mode-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card-bg);
  padding: 5px 10px;
  border-radius: 20px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.switch-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.switch-label.active {
  color: var(--accent-color);
  font-weight: 600;
}

.toggle-checkbox {
  display: none;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 24px;
  background-color: #e9ecef;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.toggle-checkbox:checked + .toggle-slider {
  background-color: var(--accent-color);
}

.toggle-slider::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background-color: white;
  border-radius: 50%;
  transition: var(--transition);
}

.toggle-checkbox:checked + .toggle-slider::after {
  transform: translateX(20px);
}

/* Categories */
.category-section {
  margin-bottom: 40px;
}

.category-title {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  padding-left: 10px;
  border-left: 4px solid var(--accent-color);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 15px;
  border: 1px solid transparent;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--hover-shadow);
  border-color: var(--accent-color);
}

.card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--accent-color);
  flex-shrink: 0;
}

.card-content {
  flex: 1;
  min-width: 0; /* 防止文本溢出 */
}

.card-title {
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 60px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Port Generator */
.port-generator {
  margin-bottom: 30px;
  display: flex;
  justify-content: center;
}

.port-display {
  background: var(--card-bg);
  padding: 15px 25px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.port-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.port-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-color);
  font-family: "Courier New", monospace;
  min-width: 60px;
  text-align: center;
}

.port-button {
  background: var(--accent-color);
  color: white;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 0.9rem;
}

.port-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.port-button:active {
  transform: translateY(0);
}

.port-button i {
  pointer-events: none;
}

.port-button.copied {
  background: #10b981;
}

.port-button.copied i::before {
  content: "\f00c";
}

/* String Generator */
.string-generator {
  margin-bottom: 30px;
  display: flex;
  justify-content: center;
}

.string-display {
  background: var(--card-bg);
  padding: 15px 25px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.string-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.string-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-color);
  font-family: "Courier New", monospace;
  min-width: 80px;
  text-align: center;
}

.string-button {
  background: var(--accent-color);
  color: white;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 0.9rem;
}

.string-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.string-button:active {
  transform: translateY(0);
}

.string-button i {
  pointer-events: none;
}

.string-button.copied {
  background: #10b981;
}

.string-button.copied i::before {
  content: "\f00c";
}