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

body {
  background: #0f0f13;
  color: #e0e0e0;
  font-family: 'Segoe UI', sans-serif;
  min-height: 100vh;
  padding: 24px 16px;
}

h1 {
  text-align: center;
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 8px;
}

.subtitle {
  text-align: center;
  color: #888;
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.github-link {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.github-link a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #666;
  text-decoration: none;
  font-size: 0.8rem;
  border: 1px solid #2a2a35;
  border-radius: 20px;
  padding: 5px 14px;
  transition: all 0.2s;
}

.github-link a:hover {
  color: #aaa;
  border-color: #444;
}

.guide {
  max-width: 640px;
  margin: 0 auto 24px;
  background: #1a1a22;
  border: 1px solid #2a2a35;
  border-radius: 14px;
  padding: 16px 20px;
}

.guide h3 {
  font-size: 0.8rem;
  color: #555;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.guide ol {
  padding-left: 18px;
}

.guide li {
  font-size: 0.82rem;
  color: #777;
  margin-bottom: 6px;
  line-height: 1.5;
}

.guide li span {
  color: #94a3b8;
}

.section-label {
  text-align: center;
  font-size: 0.72rem;
  color: #444;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.tab {
  padding: 7px 16px;
  border-radius: 20px;
  border: 1px solid #333;
  background: #1a1a22;
  color: #aaa;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.tab:hover:not(:disabled) {
  border-color: #555;
  color: #ddd;
}

.tab.active {
  background: #4f46e5;
  border-color: #4f46e5;
  color: #fff;
}

.tab:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.tabs-divider {
  max-width: 640px;
  margin: 16px auto;
  border: none;
  border-top: 1px solid #2a2a35;
}

.card {
  max-width: 640px;
  margin: 0 auto 20px;
  background: #1a1a22;
  border-radius: 14px;
  padding: 22px;
  border: 1px solid #2a2a35;
}

.card h2 {
  font-size: 1rem;
  color: #aaa;
  margin-bottom: 16px;
}

.key-box {
  background: #0f0f13;
  border: 1px solid #2a2a35;
  border-radius: 10px;
  padding: 14px;
  font-family: monospace;
  font-size: 0.78rem;
  word-break: break-all;
  color: #7dd3fc;
  line-height: 1.5;
  min-height: 54px;
  display: flex;
  align-items: center;
}

.key-box.empty {
  color: #555;
  font-family: sans-serif;
  font-size: 0.85rem;
}

.copy-btn {
  margin-top: 12px;
  width: 100%;
  padding: 10px;
  background: #4f46e5;
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
}

.copy-btn:hover {
  background: #4338ca;
}

.copy-btn:disabled {
  background: #2a2a35;
  color: #555;
  cursor: default;
}

.top5 {
  margin-top: 16px;
}

.top5 h3 {
  font-size: 0.8rem;
  color: #666;
  margin-bottom: 8px;
}

.top5-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 10px;
  background: #0f0f13;
  border-radius: 7px;
  margin-bottom: 5px;
  font-size: 0.8rem;
}

.top5-item .host {
  color: #94a3b8;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top5-item .latency {
  color: #4ade80;
  margin-left: 10px;
  flex-shrink: 0;
}

.top5-item .uptime {
  color: #666;
  margin-left: 8px;
  font-size: 0.72rem;
  flex-shrink: 0;
}

.top5-item .copy-small {
  margin-left: 8px;
  background: none;
  border: 1px solid #333;
  color: #888;
  border-radius: 5px;
  padding: 2px 8px;
  cursor: pointer;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.top5-item .copy-small:hover {
  border-color: #555;
  color: #ccc;
}

.stats {
  text-align: center;
  color: #555;
  font-size: 0.8rem;
  margin-top: 10px;
}

.refresh-btn {
  display: block;
  margin: 0 auto 20px;
  padding: 9px 24px;
  background: #1a1a22;
  border: 1px solid #333;
  color: #aaa;
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.refresh-btn:hover {
  border-color: #555;
  color: #ddd;
}

.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid #333;
  border-top-color: #4f46e5;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

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

.collapsed-toggle {
  display: none;
  justify-content: center;
  align-items: center;
  gap: 6px;
  margin: 4px auto 8px;
  cursor: pointer;
  font-size: 0.75rem;
  color: #555;
  background: none;
  border: none;
  padding: 4px 10px;
}

.collapsed-toggle:hover {
  color: #888;
}

.collapsed-toggle svg {
  transition: transform 0.25s;
  flex-shrink: 0;
}

.collapsed-toggle.open svg {
  transform: rotate(180deg);
}

.tabs-collapsed {
  display: none;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.tabs-collapsed.open {
  display: flex;
}

.badge-new {
  display: inline-block;
  background: #ca8a04;
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 4px;
  letter-spacing: 0.03em;
}

.country-block {
  border-top: 1px solid #2a2a3a;
  padding-top: 14px;
  margin-top: 14px;
}

.country-block:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.country-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.country-stats {
  font-size: 0.75rem;
  font-weight: 400;
  color: #888;
}