/* ==========================================
   SMART CONVEYOR IoT DASHBOARD — CSS
   Dark mode, glassmorphism, responsive
   ========================================== */

:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-card-hover: #1e2a42;
  --border: #2a3654;
  --text-primary: #e8ecf4;
  --text-secondary: #8b95a8;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-orange: #f59e0b;
  --accent-purple: #8b5cf6;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --radius: 16px;
  --radius-sm: 10px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* HEADER */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 32px;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  font-size: 32px;
  filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.5));
  animation: spin 4s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

header h1 {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
}

.status-badge.stopped {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: var(--accent-red);
}

.status-badge.emergency {
  background: rgba(239, 68, 68, 0.25);
  border-color: rgba(239, 68, 68, 0.5);
  color: var(--accent-red);
  animation: pulse-red 1s infinite;
}

@keyframes pulse-red {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: blink 2s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.clock {
  font-size: 14px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* MAIN */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* STATS ROW */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.stat-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.stat-card.primary {
  background: linear-gradient(135deg, #1e3a5f 0%, #1a2236 100%);
  border-color: rgba(59, 130, 246, 0.3);
}

.stat-icon {
  font-size: 36px;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.stat-value small {
  font-size: 16px;
  font-weight: 400;
  color: var(--text-secondary);
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* CONTENT ROWS */
.content-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.panel-header h2 {
  font-size: 15px;
  font-weight: 600;
}

/* CAMERA */
.camera-container {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.camera-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.camera-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.camera-placeholder span {
  font-size: 48px;
  opacity: 0.3;
}

.camera-placeholder p {
  font-size: 14px;
}

.camera-placeholder small {
  font-size: 11px;
  opacity: 0.5;
}

.live-badge {
  color: var(--accent-red);
  font-size: 12px;
  font-weight: 600;
  animation: pulse-red 1.5s infinite;
}

/* CHART */
.chart-container {
  padding: 16px;
  height: 300px;
}

.chart-controls {
  display: flex;
  gap: 6px;
}

.btn-sm {
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-sm:hover, .btn-sm.active {
  background: var(--accent-blue);
  color: white;
  border-color: var(--accent-blue);
}

/* CONTROLS */
.controls {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-control {
  padding: 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.btn-stop {
  background: linear-gradient(135deg, #dc2626, #991b1b);
  color: white;
}

.btn-stop:hover {
  transform: scale(1.02);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

.btn-stop.active {
  background: linear-gradient(135deg, #16a34a, #15803d);
}

.btn-reset {
  background: linear-gradient(135deg, #d97706, #92400e);
  color: white;
}

.btn-reset:hover {
  transform: scale(1.02);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

.system-info {
  padding: 0 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 8px 12px;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
}

.text-green { color: var(--accent-green); }

/* EVENT LOG */
.event-log {
  max-height: 320px;
  overflow-y: auto;
  padding: 12px;
}

.log-entry {
  padding: 10px 14px;
  margin-bottom: 6px;
  border-radius: 8px;
  font-size: 13px;
  display: flex;
  gap: 12px;
  background: rgba(255,255,255,0.02);
  border-left: 3px solid var(--border);
}

.log-entry.info { border-left-color: var(--accent-blue); }
.log-entry.success { border-left-color: var(--accent-green); }
.log-entry.warning { border-left-color: var(--accent-orange); }
.log-entry.danger { border-left-color: var(--accent-red); }

.log-time {
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary);
  font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* RESPONSIVE */
@media (max-width: 768px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .content-row { grid-template-columns: 1fr; }
  header { padding: 12px 16px; }
  main { padding: 16px; }
  .stat-value { font-size: 24px; }
  .stat-icon { font-size: 28px; width: 48px; height: 48px; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .header-right { flex-direction: column; align-items: flex-end; gap: 6px; }
}