/* === Design Tokens === */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent: #10b981;
  --accent-hover: #059669;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #f59e0b;
  --info: #3b82f6;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* === Reset === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* === App Layout === */
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

/* === Header === */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo .accent {
  color: var(--accent);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-icon:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.btn-icon:active {
  transform: scale(0.95);
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background var(--transition);
}

.status-pill.online .status-dot {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-pill.offline .status-dot {
  background: var(--danger);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* === Navigation === */
.nav {
  display: flex;
  gap: 0.25rem;
  padding: 0.3rem;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nav-btn.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
}

/* === Tab Content === */
.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Server Cards === */
.server-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.25rem;
}

.server-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.server-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

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

.server-card:hover::before {
  opacity: 1;
}

.server-card.offline {
  opacity: 0.6;
}

.server-card.offline::before {
  background: linear-gradient(90deg, var(--danger), transparent);
}

.server-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.server-name {
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: capitalize;
}

.server-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.server-badge.online {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.server-badge.offline {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.server-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-value.accent {
  color: var(--accent);
}

.server-players-preview {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.server-players-preview h4 {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.player-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.player-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.6rem;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.player-tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.no-players {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

/* === Panels === */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  margin-bottom: 1.25rem;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.panel h2 {
  font-size: 1rem;
  font-weight: 600;
}

.panel-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

/* === Forms === */
.input, .select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.85rem;
  transition: border-color var(--transition);
  outline: none;
}

.input:focus, .select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input::placeholder {
  color: var(--text-muted);
}

.select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

.select option {
  background: var(--bg-secondary);
}

.form-group {
  margin-bottom: 0.75rem;
}

.form-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.form-row .input {
  flex: 1;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-row {
  display: flex;
  gap: 0.5rem;
}

/* === Action Grid === */
.action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.action-card {
  padding: 1.25rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}

.action-card:hover {
  border-color: var(--border-hover);
}

.action-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
}

.action-result {
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: 'SF Mono', 'Fira Code', monospace;
  min-height: 2rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.action-result:empty {
  display: none;
}

/* === Player List === */
.player-list {
  min-height: 80px;
}

.player-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.player-row:hover {
  background: var(--bg-glass);
}

.player-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.player-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--info));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
}

.player-name {
  font-weight: 500;
  font-size: 0.9rem;
}

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
}

/* === Console === */
.console-panel {
  display: flex;
  flex-direction: column;
}

.console-output {
  background: #000;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  height: 400px;
  overflow-y: auto;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.console-output::-webkit-scrollbar {
  width: 6px;
}

.console-output::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.console-line {
  padding: 0.15rem 0;
  word-break: break-word;
}

.console-line.command {
  color: var(--accent);
}

.console-line.command::before {
  content: '> ';
  color: var(--text-muted);
}

.console-line.response {
  color: var(--text-secondary);
}

.console-line.error {
  color: var(--danger);
}

.console-line.system {
  color: var(--text-muted);
  font-style: italic;
}

.console-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.console-prompt {
  color: var(--accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 700;
  font-size: 1rem;
}

.console-input {
  flex: 1;
  padding: 0.6rem 0.85rem;
  background: #000;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

.console-input:focus {
  border-color: var(--accent);
}

.console-input::placeholder {
  color: var(--text-muted);
}

/* === Whitelist === */
.whitelist-form {
  max-width: 500px;
}

/* === Toast Notifications === */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
}

.toast {
  padding: 0.75rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  font-size: 0.85rem;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 3.7s forwards;
  max-width: 360px;
}

.toast.success {
  border-left: 3px solid var(--accent);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.info {
  border-left: 3px solid var(--info);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* === Loading Skeleton === */
.skeleton {
  background: linear-gradient(90deg, var(--bg-glass) 25%, rgba(255,255,255,0.06) 50%, var(--bg-glass) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* === Responsive === */
@media (max-width: 768px) {
  .app {
    padding: 0 1rem 2rem;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav-btn {
    padding: 0.5rem 0.85rem;
    font-size: 0.8rem;
  }

  .server-grid {
    grid-template-columns: 1fr;
  }

  .action-grid {
    grid-template-columns: 1fr;
  }

  .console-output {
    height: 300px;
  }
}