:root {
  --bg-primary: #0a0f18;
  --bg-secondary: #121a29;
  --bg-card: #182337;
  --bg-hover: #1f2d47;
  --border-color: #243552;
  --text-primary: #e6edf8;
  --text-secondary: #8ea2c6;
  --text-muted: #566885;
  --accent-cyan: #00d2ff;
  --accent-blue: #0077ff;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  min-height: 100vh;
  line-height: 1.5;
}

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

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

.brand-icon {
  font-size: 38px;
  filter: drop-shadow(0 0 10px rgba(0, 210, 255, 0.4));
}

.brand-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  color: var(--text-secondary);
  font-size: 13px;
}

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

.metric-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px 16px;
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.metric-value {
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.metric-online {
  color: var(--accent-emerald);
}

.connection-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--accent-emerald);
}

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

.connection-indicator.disconnected {
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.3);
  color: var(--accent-rose);
}

.connection-indicator.disconnected .dot {
  background-color: var(--accent-rose);
  box-shadow: 0 0 8px var(--accent-rose);
}

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-secondary);
  color: var(--accent-cyan);
  border: 1px solid var(--border-color);
}

/* Content Area */
.tab-pane {
  display: none;
}

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

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-header h2 {
  font-size: 20px;
  font-weight: 600;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 2px;
}

/* Buttons */
.btn {
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue) 0%, #0055cc 100%);
  color: #fff;
}

.btn-primary:hover {
  filter: brightness(1.15);
}

.btn-secondary {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-primary);
}

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

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  border-color: rgba(244, 63, 94, 0.4);
  color: var(--accent-rose);
}

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

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

/* Devices Grid */
.devices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 20px;
}

.device-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}

.device-card:hover {
  border-color: rgba(0, 210, 255, 0.4);
}

.device-card.offline {
  opacity: 0.75;
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.device-title {
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.device-id-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.status-badge.online {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.status-badge.offline {
  background: rgba(86, 104, 133, 0.2);
  color: var(--text-muted);
}

.status-badge.updating {
  background: rgba(0, 210, 255, 0.15);
  color: var(--accent-cyan);
}

.status-badge.error {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
}

.device-info-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 12px;
  background: var(--bg-card);
  padding: 12px;
  border-radius: 6px;
}

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

.info-label {
  color: var(--text-muted);
  font-size: 10px;
  text-transform: uppercase;
}

.info-val {
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Progress bar for OTA updates */
.ota-progress-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(0, 210, 255, 0.05);
  border: 1px solid rgba(0, 210, 255, 0.2);
  padding: 10px;
  border-radius: 6px;
}

.ota-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-family: var(--font-mono);
}

.ota-progress-bar {
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
}

.ota-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-emerald));
  transition: width 0.3s ease;
}

.device-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

/* Tables */
.table-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.data-table th {
  background: var(--bg-card);
  color: var(--text-secondary);
  padding: 12px 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.data-table tr:hover {
  background: var(--bg-hover);
}

.code-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.empty-cell {
  text-align: center;
  color: var(--text-muted);
  padding: 30px !important;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 540px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-lg {
  max-width: 800px;
}

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

.modal-header h3 {
  font-size: 17px;
  font-weight: 600;
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-group.half {
  flex: 1;
}

.form-group label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-control {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 6px;
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-cyan);
}

.file-drop-area {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  background: var(--bg-primary);
  cursor: pointer;
}

.file-drop-area:hover {
  border-color: var(--accent-cyan);
}

.file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file-chosen-name {
  font-size: 12px;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  margin-top: 4px;
}

.notice-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 12px;
  border-radius: 6px;
  font-size: 12px;
  color: #fbbf24;
}

.summary-box {
  background: var(--bg-card);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
}

.terminal-log {
  background: #000;
  color: #00ff88;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 14px;
  border-radius: 6px;
  max-height: 400px;
  overflow-y: auto;
  white-space: pre-wrap;
  line-height: 1.6;
}

/* Android & Platform Badges */
.badge-android {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.battery-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.battery-pill.charging {
  color: #38bdf8;
  background: rgba(56, 189, 248, 0.1);
}

.battery-pill.low {
  color: #f43f5e;
  background: rgba(244, 63, 94, 0.1);
}