/**
 * MSG4wrd SocketIO Monitor - Modern Design System
 * Focus: High-density data, dark theme, accessibility
 */

:root {
  /* Colors */
  --bg-primary: #050816;
  --bg-secondary: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  
  --brand-primary: #6366f1;
  --brand-success: #10b981;
  --brand-warning: #f59e0b;
  --brand-danger: #ef4444;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --border-color: #334155;
  --focus-ring: rgba(99, 102, 241, 0.5);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  
  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
}

/* Base Reset & Typography */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Navbar */
.navbar {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-status {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-online { background-color: var(--brand-success); box-shadow: 0 0 10px var(--brand-success); }
.status-offline { background-color: var(--brand-danger); }

/* Layout Grid */
.grid {
  display: grid;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.grid-stats {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* Components: Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-md);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Stats Dashboard */
.stats-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: transform var(--transition-fast);
}

.stats-card:hover {
  transform: translateY(-2px);
}

.stats-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--brand-primary);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stats-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Forms & Controls */
.form-row {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  gap: var(--space-md);
  align-items: end;
  margin-bottom: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

input[type="text"] {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  gap: var(--space-sm);
}

.btn-primary { background: var(--brand-primary); color: white; }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-success { background: transparent; border-color: var(--brand-success); color: var(--brand-success); }
.btn-success:hover { background: var(--brand-success); color: white; }

.btn-warning { background: transparent; border-color: var(--brand-warning); color: var(--brand-warning); }
.btn-warning:hover { background: var(--brand-warning); color: white; }

.btn-danger { background: var(--brand-danger); color: white; }
.btn-danger:hover { opacity: 0.9; }

.form-actions {
  display: flex;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

/* Toggle Switch */
.toggle-switch {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.switch {
  position: relative;
  width: 44px;
  height: 22px;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--text-muted);
  transition: .4s;
  border-radius: 22px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider { background-color: var(--brand-primary); }
input:checked + .slider:before { transform: translateX(22px); }

/* Transactions Stream */
.terminal-window {
  background: #000;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: 'JetBrains Mono', monospace;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.terminal-header {
  display: grid;
  grid-template-columns: 180px 120px 80px 1fr 120px;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.terminal-body {
  height: 600px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.terminal-body::-webkit-scrollbar { width: 6px; }
.terminal-body::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }

/* Log Row Styling */
.log-row {
  display: grid;
  grid-template-columns: 180px 120px 80px 1fr 120px;
  gap: var(--space-md);
  padding: 0.75rem var(--space-md);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  font-size: 0.8125rem;
  transition: background var(--transition-fast);
  cursor: pointer;
  align-items: center;
}

.log-row:hover {
  background: rgba(255,255,255,0.03);
}

.log-row.new {
  animation: logFadeIn 0.5s ease;
  background: rgba(16, 185, 129, 0.05);
}

@keyframes logFadeIn {
  from { background: rgba(16, 185, 129, 0.2); }
  to { background: transparent; }
}

.log-timestamp { color: var(--text-muted); font-size: 0.75rem; }
.log-channel { color: var(--brand-primary); font-weight: 600; }
.log-method { color: var(--brand-warning); font-weight: 600; }
.log-endpoint { color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.log-status { color: var(--brand-success); margin-right: 0.5rem; }
.log-ip { color: var(--text-muted); text-align: right; font-size: 0.75rem; }

/* Expanded Details */
.log-details {
  background: #0a0a0a;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.detail-section h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  letter-spacing: 0.1em;
}

/* Channel Dropdown */
.channel-select {
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.625rem 2.5rem 0.625rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236366f1'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.25em 1.25em;
  cursor: pointer;
  transition: all var(--transition-base);
  min-width: 220px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(4px);
}

.channel-select:hover {
  border-color: var(--brand-primary);
  background-color: rgba(99, 102, 241, 0.1);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
}

.channel-select:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px var(--focus-ring);
  background-color: var(--bg-input);
}

.channel-select option {
  background-color: var(--bg-card);
  color: var(--text-primary);
  padding: 0.5rem;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
}

.empty-icon { font-size: 3rem; margin-bottom: var(--space-md); opacity: 0.5; }

/* Floating UI */
.clear-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
  z-index: 99;
}

/* Responsive */
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
  .transaction-header { grid-template-columns: 1fr; }
  .navbar-brand { font-size: 1rem; }
  .stats-number { font-size: 1.75rem; }
}