/* Modern Glassmorphism & Cyberpunk-tinted Dark Theme */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #121826;
  --bg-card: rgba(18, 24, 38, 0.75);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-active: rgba(56, 189, 248, 0.4);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-cyan: #38bdf8;
  --color-emerald: #10b981;
  --color-amber: #f59e0b;
  --color-rose: #f43f5e;
  --color-violet: #a855f7;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

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

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.08) 0px, transparent 50%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  padding: 24px;
  line-height: 1.5;
}

/* Header */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  margin-bottom: 24px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-icon {
  font-size: 28px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-violet));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-sub {
  font-size: 12px;
  color: var(--text-secondary);
}

.header-status-pills {
  display: flex;
  gap: 12px;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-emerald);
  box-shadow: 0 0 8px var(--color-emerald);
}

.status-dot.down {
  background: var(--color-rose);
  box-shadow: 0 0 8px var(--color-rose);
}

/* Layout Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 1080px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Styling */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 22px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  transition: border-color 0.2s;
}

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

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-cyan);
}

/* Controls Bar */
.control-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.select-box, .btn {
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  outline: none;
}

.select-box {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  flex: 1;
  min-width: 160px;
}

.select-box option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn {
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7, #0369a1);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #0369a1, #075985);
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.4);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: var(--color-rose);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.3);
}

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

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

/* Video Player Display Area */
.player-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.simulated-stream-screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle, #1a2234 0%, #0c101a 100%);
  padding: 20px;
  text-align: center;
}

.screen-badge {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 9999px;
  margin-bottom: 12px;
  font-weight: 600;
}

.badge-360p { background: rgba(56, 189, 248, 0.2); color: var(--color-cyan); border: 1px solid var(--color-cyan); }
.badge-720p { background: rgba(245, 158, 11, 0.2); color: var(--color-amber); border: 1px solid var(--color-amber); }
.badge-1080p { background: rgba(16, 185, 129, 0.2); color: var(--color-emerald); border: 1px solid var(--color-emerald); }

/* Chunk Blocks Visualizer */
.chunk-sequence-bar {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  overflow-x: auto;
  padding-bottom: 4px;
}

.chunk-block {
  flex: 1;
  min-width: 36px;
  height: 48px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chunk-block.active {
  transform: scale(1.08);
  box-shadow: 0 0 12px var(--color-cyan);
}

.chunk-block.done-360p {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

.chunk-block.done-720p {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--color-amber);
  color: var(--color-amber);
}

.chunk-block.done-1080p {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--color-emerald);
  color: var(--color-emerald);
}

/* Stats Metrics Cards */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.mini-stat {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  padding: 10px 14px;
}

.mini-stat-label {
  font-size: 11px;
  color: var(--text-secondary);
}

.mini-stat-val {
  font-size: 16px;
  font-weight: 700;
  margin-top: 4px;
  font-family: var(--font-mono);
}

/* Right Column: Node & Topology Panel */
.node-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 12px;
}

.node-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.node-name {
  font-weight: 600;
  font-size: 14px;
}

.node-details {
  display: flex;
  gap: 16px;
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.node-actions {
  display: flex;
  gap: 8px;
}

.btn-xs {
  padding: 5px 10px;
  font-size: 11px;
  border-radius: 6px;
}

/* Terminal Log View */
.terminal-window {
  background: #060910;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  height: 240px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 12px;
}

.log-entry {
  line-height: 1.6;
  white-space: nowrap;
}

.log-time { color: var(--text-muted); margin-right: 8px; }
.log-hit { color: var(--color-emerald); font-weight: 600; }
.log-miss { color: var(--color-cyan); }
.log-failover { color: var(--color-rose); font-weight: 700; background: rgba(244, 63, 94, 0.1); }

/* Canvas Chart */
.chart-box {
  width: 100%;
  height: 140px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  border: 1px solid var(--border-glass);
}

/* Mobile & Tablet Responsive Layout */
@media (max-width: 900px) {
  body {
    padding: 12px;
  }
  .top-nav {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 20px;
  }
  .header-status-pills {
    flex-wrap: wrap;
    width: 100%;
    gap: 8px;
  }
  .status-pill {
    padding: 4px 10px;
    font-size: 11px;
  }
  .main-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .control-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .control-bar .select-box,
  .control-bar .btn {
    width: 100%;
    max-width: 100% !important;
  }
  .metrics-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .node-details {
    flex-direction: column;
    gap: 6px;
  }
  .node-actions {
    flex-wrap: wrap;
    gap: 6px;
  }
  .node-actions .btn {
    flex: 1 1 calc(50% - 6px);
    text-align: center;
  }
}