:root {
  --bg-page: #0f1114;
  --bg-panel: #1a1d23;
  --bg-card: #22262e;
  --bg-card-hover: #282d36;
  --border: #2d323c;
  --text: #e8eaed;
  --text-muted: #9aa0a8;
  --accent: #f0b429;
  --online: #4caf50;
  --offline: #ef5350;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-page);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100vh;
  padding: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.panel {
  width: 100%;
  max-width: 720px;
  background: var(--bg-panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.panel-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.btn-help {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, border-color 0.2s;
}

.btn-help:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.panel-content {
  padding: 0 20px 20px;
}

.table-header {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  padding: 14px 16px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.col-name { }
.col-players { text-align: center; }
.col-ip { text-align: right; }

.server-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 8px;
}

.loading {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
}

.server-card {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: background 0.2s, border-color 0.2s;
}

.server-card:hover {
  background: var(--bg-card-hover);
}

.server-card.offline {
  opacity: 0.85;
}

.server-card.offline .server-name-text {
  color: var(--text-muted);
}

.server-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.server-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(145deg, #3d434d, #2a2e36);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}

.server-icon .server-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.server-card.offline .server-icon {
  filter: grayscale(1);
  opacity: 0.7;
}

.server-name-text {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.server-players {
  font-variant-numeric: tabular-nums;
  text-align: center;
  color: var(--text);
}

.server-card.offline .server-players {
  color: var(--offline);
}

.server-ip-cell {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  justify-content: flex-end;
}

.server-ip {
  font-size: 0.9rem;
  color: var(--text);
}

.btn-copy {
  flex-shrink: 0;
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-copy:hover:not(:disabled) {
  background: rgba(240, 180, 41, 0.12);
  border-color: var(--accent);
}

.btn-copy:disabled {
  cursor: default;
  color: var(--online);
  border-color: var(--online);
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.online {
  background: rgba(76, 175, 80, 0.2);
  color: var(--online);
}

.status-badge.offline {
  background: rgba(239, 83, 80, 0.2);
  color: var(--offline);
}

.error-message {
  margin-top: 12px;
  padding: 12px;
  background: rgba(239, 83, 80, 0.15);
  border: 1px solid rgba(239, 83, 80, 0.3);
  border-radius: 8px;
  color: #f8a0a0;
  font-size: 0.9rem;
}

.error-message.hidden {
  display: none;
}

.hidden {
  display: none !important;
}

@media (max-width: 600px) {
  .app {
    padding: 12px;
  }

  .panel-header,
  .panel-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .table-header {
    display: none;
  }

  .server-card {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    gap: 8px;
  }

  .server-info {
    grid-column: 1;
  }

  .server-players {
    text-align: left;
    grid-column: 1;
  }

  .server-ip-cell {
    justify-content: flex-start;
    grid-column: 1;
  }

  .server-ip {
    font-size: 0.85rem;
  }
}