:root {
  --bg: #0b0f14;
  --bg-2: rgba(22, 27, 34, 0.6);
  --text: #e6edf3;
  --muted: #9aa7b2;
  --card: rgba(255, 255, 255, 0.06);
  --border-1: rgba(255, 255, 255, 0.15);
  --border-2: rgba(255, 255, 255, 0.25);
  --accent: #62d69f;
  --danger: #ff6b6b;
  --warn: #ffd166;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.light {
  --bg: #f2f4f8;
  --bg-2: rgba(255, 255, 255, 0.7);
  --text: #111418;
  --muted: #5b6570;
  --card: rgba(255, 255, 255, 0.65);
  --border-1: rgba(0, 0, 0, 0.06);
  --border-2: rgba(0, 0, 0, 0.12);
  --accent: #2a9d8f;
  --danger: #d62828;
  --warn: #e9c46a;
  --shadow: 0 6px 20px rgba(0, 0, 0, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
* {
  box-sizing: border-box;
}
html, body {
  height: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background: radial-gradient(1200px 600px at 10% 10%, rgba(98, 214, 159, 0.1), transparent) no-repeat, var(--bg);
  color: var(--text);
  transition: background-color 0.3s ease, color 0.3s ease;
  animation: fadeIn 500ms ease-out both;
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px clamp(16px, 5vw, 28px);
  position: static;
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border-bottom: 1px solid var(--border-1);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}
.title {
  margin: 0;
  font-size: clamp(20px, 3.2vw, 28px);
  letter-spacing: 0.2px;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.3s ease, background 0.3s ease;
}
.theme-toggle:hover {
  transform: translateY(-1px) scale(1.01);
  box-shadow: 0 18px 28px rgba(0, 0, 0, 0.35);
}
.toggle-icon {
  inline-size: 18px;
  block-size: 18px;
  border-radius: 50%;
  background: radial-gradient(8px 8px at 50% 50%, var(--accent), transparent), conic-gradient(from 180deg at 50% 50%, rgba(255,255,255,0.2), rgba(255,255,255,0.05));
  transition: transform 0.3s ease;
}
.theme-toggle[aria-pressed="true"] .toggle-icon {
  transform: rotate(180deg);
}
.toggle-text {
  font-size: 14px;
  color: var(--muted);
}
.main {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.5vw, 24px);
  padding: clamp(16px, 5vw, 28px);
}
@media (min-width: 900px) {
  .main {
    grid-template-columns: 1.2fr 1fr;
    align-items: start;
  }
}
.dc-section, .search-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dc-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: clamp(12px, 2.2vw, 18px);
}
.card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 10px;
  padding: 16px 18px;
  border-radius: 18px;
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border-2);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(110%);
  transform: translateZ(0);
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.card.best {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(98, 214, 159, 0.25), var(--shadow);
}
.card.best .latency {
  color: var(--accent);
}
.card.worst {
  border-color: var(--danger);
  box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.25), var(--shadow);
}
.card.worst .latency {
  color: var(--danger);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 36px rgba(0, 0, 0, 0.4);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-title {
  font-weight: 600;
  letter-spacing: 0.3px;
}
.title-compact {
  display: none;
}
.title-full {
  display: inline;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.region-badge {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.06));
  font-size: 11px;
  color: var(--muted);
}
.dot {
  inline-size: 10px;
  block-size: 10px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 0 rgba(255,255,255,0.1);
  transition: background-color 0.25s ease, box-shadow 0.25s ease;
}
.latency {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.4px;
}
.unit {
  font-size: 14px;
  color: var(--muted);
}
.spinner {
  inline-size: 18px;
  block-size: 18px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.25);
  border-top-color: var(--warn);
  animation: spin 900ms linear infinite;
}
.connecting .dot {
  background: var(--warn);
}
.connecting .latency {
  color: var(--muted);
  animation: pulse 900ms ease-in-out infinite;
}
.online .dot {
  background: var(--accent);
  box-shadow: 0 0 16px rgba(98, 214, 159, 0.6);
}
.offline .dot {
  background: var(--danger);
  box-shadow: 0 0 12px rgba(255, 107, 107, 0.6);
}
.search-box {
  display: grid;
  gap: 10px;
}
.search-input {
  inline-size: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.02));
  color: var(--text);
  box-shadow: var(--shadow);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(98, 214, 159, 0.18);
}
.assist-text {
  font-size: 12px;
  color: var(--muted);
}
.results {
  display: grid;
  gap: 10px;
}
.refresh-count {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.04));
  inline-size: fit-content;
}
.result {
  display: grid;
  grid-template-columns: 40px 1fr auto auto;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  transform: translateX(-8px);
  opacity: 0;
  animation: slideIn 400ms ease forwards;
}
.flag {
  font-size: 24px;
  text-align: center;
}
.country {
  font-weight: 600;
}
.code {
  font-family: ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  color: var(--muted);
}
.dc-badge {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--border-2);
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.04));
}
.dc-details {
  overflow: hidden;
  max-height: 0;
  border-top: 1px dashed var(--border-2);
  margin-top: 8px;
  padding-top: 8px;
  transition: max-height 0.25s ease;
}
.card.expanded .dc-details {
  max-height: 120px;
}
.details-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}
.details-label {
  font-size: 12px;
  color: var(--muted);
}
.details-value {
  font-family: ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  cursor: pointer;
  user-select: text;
  padding: 6px 8px;
  border-radius: 8px;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.details-value:hover, .details-value:focus {
  background: linear-gradient(160deg, var(--card), rgba(255, 255, 255, 0.06));
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.25);
}
.footer {
  padding: 24px clamp(16px, 5vw, 28px);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
}
.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-8px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@media (max-width: 640px) {
  .card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .status {
    width: 100%;
  }
  .dc-cards {
    grid-template-columns: repeat(2, minmax(150px, 1fr));
    gap: 10px;
  }
  .title-full {
    display: none;
  }
  .title-compact {
    display: inline;
  }
  .card {
    padding: 12px;
    border-radius: 14px;
    overflow: hidden;
  }
  .card-title {
    font-size: 13px;
  }
  .status {
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .latency {
    font-size: 20px;
  }
  .spinner {
    inline-size: 14px;
    block-size: 14px;
    border-width: 2px;
  }
  .details-value {
    font-size: 12px;
  }
  .dc-details {
    width: 100%;
  }
  .details-row {
    grid-template-columns: auto 1fr;
  }
}
@media (max-width: 380px) {
  .dc-cards {
    grid-template-columns: 1fr;
  }
}