:root {
  --bg-primary: #0a0d12;
  --bg-secondary: #13171f;
  --bg-tertiary: #1c222d;
  --border-color: #2b3240;
  --border-highlight: #3b4556;
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --accent-blue: #388bfd;
  --accent-green: #2ea043;
  --accent-red: #da3633;
  --accent-red-hover: #b62324;
  --accent-orange: #d29922;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --touch-target: 44px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header */
.app-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
}

.logo-icon {
  font-size: 1.4rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: rgba(46, 160, 67, 0.15);
  border: 1px solid rgba(46, 160, 67, 0.4);
  color: #3fb950;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  background-color: #3fb950;
  border-radius: 50%;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(63, 185, 80, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(63, 185, 80, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(63, 185, 80, 0); }
}

/* View Selector Controls */
.view-controls {
  display: flex;
  background-color: var(--bg-tertiary);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  gap: 3px;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 12px;
  min-height: var(--touch-target);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

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

.view-btn.active {
  background-color: var(--accent-blue);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Header Right: E-Stop */
.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.estop-lock-status {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  border: 1px solid transparent;
}

.estop-lock-status.armed {
  background-color: rgba(218, 54, 51, 0.15);
  border-color: rgba(218, 54, 51, 0.4);
  color: #ff8787;
}

.estop-lock-status.locked {
  background-color: rgba(210, 153, 34, 0.15);
  border-color: rgba(210, 153, 34, 0.4);
  color: #d29922;
}

.estop-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.estop-status-dot.armed {
  background-color: #ff4444;
  box-shadow: 0 0 6px #ff4444;
}

.estop-status-dot.locked {
  background-color: #d29922;
}

.btn-estop {
  background: linear-gradient(135deg, var(--accent-red), #b62324);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 14px;
  min-height: var(--touch-target);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(218, 54, 51, 0.4);
  transition: all 0.2s ease;
}

.btn-estop:hover {
  background: linear-gradient(135deg, #e53e3e, #c53030);
}

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

/* Telemetry Dashboard Banner */
.telemetry-bar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 16px;
}

.telemetry-inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr 1fr 1fr 1fr;
  align-items: center;
  gap: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.telemetry-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  font-weight: 600;
}

.telemetry-val {
  font-size: 0.88rem;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.telemetry-val.highlight {
  color: var(--accent-blue);
}

.progress-item {
  min-width: 140px;
}

.telemetry-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.telemetry-val-percent {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: #3fb950;
}

.progress-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-top: 3px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2ea043, #3fb950);
  transition: width 0.4s ease;
}

/* Viewport Layout */
.viewport-container {
  flex: 1;
  padding: 16px;
  display: grid;
  gap: 16px;
}

.viewport-container.single-mode {
  grid-template-columns: 1fr;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.viewport-container.multi-mode {
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
}

/* Camera Card */
.camera-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.camera-card.hidden {
  display: none;
}

.camera-header {
  padding: 8px 14px;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cam-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cam-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #3fb950;
}

.cam-title {
  font-weight: 600;
  font-size: 0.85rem;
}

.cam-tag {
  background-color: rgba(56, 139, 253, 0.2);
  color: var(--accent-blue);
  font-size: 0.62rem;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

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

.cam-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.cam-btn:hover {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-color: #8b949e;
}

.stream-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: #000;
}

.stream-frame {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-box {
  background-color: var(--bg-secondary);
  border: 2px solid var(--accent-red);
  border-radius: 12px;
  max-width: 440px;
  width: 100%;
  padding: 24px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(218, 54, 51, 0.4);
}

.modal-icon-danger {
  font-size: 2.8rem;
  margin-bottom: 6px;
}

.modal-title {
  color: #ff6b6b;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.modal-desc {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.4;
  margin-bottom: 18px;
}

/* PIN Entry */
.pin-entry-container {
  margin-bottom: 18px;
  text-align: left;
}

.pin-label {
  display: block;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.pin-input {
  width: 100%;
  padding: 12px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: 6px;
  outline: none;
  text-align: center;
  transition: border-color 0.2s;
  min-height: var(--touch-target);
}

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

.pin-feedback {
  margin-top: 5px;
  font-size: 0.75rem;
  color: #ff8787;
  font-family: var(--font-mono);
  min-height: 16px;
  text-align: center;
}

/* Slide to confirm with Touch Action */
.slide-confirm-container {
  margin-bottom: 18px;
  user-select: none;
  -webkit-user-select: none;
}

.slide-track {
  position: relative;
  height: 54px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 27px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: none;
}

.slide-text {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  pointer-events: none;
  z-index: 2;
}

.slide-progress {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0;
  background-color: rgba(218, 54, 51, 0.4);
  z-index: 1;
}

.slide-handle {
  position: absolute;
  left: 4px;
  width: 46px;
  height: 46px;
  background-color: var(--accent-red);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-mono);
  cursor: grab;
  z-index: 3;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  touch-action: none;
}

.slide-handle:active {
  cursor: grabbing;
}

.btn-cancel {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 12px 20px;
  min-height: var(--touch-target);
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: all 0.15s ease;
}

.btn-cancel:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.estop-status-feedback {
  margin-top: 10px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  min-height: 18px;
}

/* Footer */
.app-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Mobile & Small Screen Optimizations
   ========================================================================== */

@media (max-width: 860px) {
  .app-header {
    padding: 10px 12px;
  }

  .view-controls {
    order: 3;
    width: 100%;
    justify-content: stretch;
  }

  .view-btn {
    flex: 1;
    justify-content: center;
    padding: 8px 6px;
    font-size: 0.75rem;
  }

  .view-btn span {
    display: inline;
  }

  .telemetry-inner {
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
  }

  .file-item {
    grid-column: 1 / -1;
  }

  .progress-item {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .viewport-container {
    padding: 10px 8px;
  }

  .viewport-container.multi-mode {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 1.05rem;
  }

  .btn-estop {
    padding: 8px 10px;
    font-size: 0.75rem;
  }

  .btn-estop .estop-label {
    font-size: 0.72rem;
  }

  .telemetry-val {
    font-size: 0.8rem;
  }
}