:root {
  --bg-color: #050a14;
  --surface-color: #0a192f;
  --surface-hover: #112240;
  --text-primary: #e6f1ff;
  --text-secondary: #8892b0;
  --accent-cyan: #64ffda;
  --accent-green: #39ff14;
  --accent-purple: #bd34fe;
  --accent-blue: #00e5ff;
  --border-color: #1e2d4d;
  --glass-bg: rgba(10, 25, 47, 0.85);
}

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

body {
  font-family: 'SF Mono', 'Fira Code', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image:
    radial-gradient(circle at 50% 0%, rgba(0, 229, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(189, 52, 254, 0.08) 0%, transparent 40%);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding: 1rem 2rem;
  background: rgba(5, 10, 20, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 50;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.03em;
}

header h1 span {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 15px rgba(0, 229, 255, 0.2));
}

header h1::before {
  content: '';
  width: 10px;
  height: 10px;
  background: #ff3b30;
  border-radius: 50%;
  box-shadow: 0 0 10px #ff3b30, 0 0 20px rgba(255, 59, 48, 0.4);
  animation: pulse-rec 2s infinite;
}

@keyframes pulse-rec {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.1); }
  100% { opacity: 1; transform: scale(1); }
}

/* Demo banner */
.demo-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 2rem;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: rgba(0, 229, 255, 0.04);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.demo-banner .demo-tag {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.15);
}

.demo-banner a {
  color: var(--accent-blue);
  text-decoration: none;
}

.demo-banner a:hover {
  text-decoration: underline;
}

.demo-banner .demo-repo {
  margin-left: auto;
  font-weight: 600;
}

.camera-toggles {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  flex: 1;
}

.camera-toggle {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  user-select: none;
  cursor: pointer;
  transition: color 0.2s;
}

.camera-toggle:hover {
  color: var(--text-primary);
}

.camera-toggle input[type="checkbox"] {
  display: none;
}

.camera-toggle .toggle-switch {
  position: relative;
  width: 42px;
  height: 22px;
  background: var(--surface-hover);
  border-radius: 99px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-color);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

.camera-toggle .toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
}

.camera-toggle input[type="checkbox"]:checked + .toggle-switch {
  background: rgba(0, 229, 255, 0.15);
  border-color: var(--accent-blue);
  box-shadow: inset 0 0 10px rgba(0, 229, 255, 0.1);
}

.camera-toggle input[type="checkbox"]:checked + .toggle-switch::after {
  left: 22px;
  background: var(--accent-blue);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
}

.camera-toggle input[type="checkbox"]:checked ~ span {
  color: var(--text-primary);
  text-shadow: 0 0 8px rgba(230, 241, 255, 0.3);
}

.controls {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.controls label::before {
  content: '';
  display: block;
  width: 3px;
  height: 14px;
  background: var(--accent-cyan);
  border-radius: 4px;
  box-shadow: 0 0 8px rgba(100, 255, 218, 0.6);
}

.select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.select-wrapper::after {
  content: '▼';
  font-size: 0.6rem;
  color: var(--accent-cyan);
  position: absolute;
  right: 1rem;
  pointer-events: none;
  transition: transform 0.2s;
}

.select-wrapper:hover::after {
  transform: translateY(2px);
  text-shadow: 0 0 8px var(--accent-cyan);
}

.controls select {
  appearance: none;
  background: rgba(10, 25, 47, 0.6);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.6rem 2.5rem 0.6rem 1rem;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
  min-width: 140px;
  backdrop-filter: blur(4px);
}

.controls select:hover {
  background: var(--surface-hover);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(100, 255, 218, 0.1);
  transform: translateY(-1px);
}

.controls select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
}

.controls select option {
  background: var(--surface-color);
  color: var(--text-primary);
  padding: 1rem;
}

main {
  padding: 1.5rem;
  flex: 1;
  min-height: 0;
}

/* Grid layouts */
.grid {
  display: grid;
  gap: 1.5rem;
  height: 100%;
}

.layout-1 {
  grid-template-columns: 1fr;
  grid-template-rows: 1fr;
}

.layout-2 {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: 1fr;
}

.layout-4 {
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.layout-6 {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.layout-7 {
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.layout-7 .camera-slot:nth-child(5),
.layout-7 .camera-slot:nth-child(6),
.layout-7 .camera-slot:nth-child(7) {
  grid-column: span 1.33;
}

.layout-8 {
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

/* Camera slot */
.camera-slot {
  background: var(--surface-color);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.camera-slot:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(189, 52, 254, 0.15);
  transform: translateY(-2px);
}

.camera-slot video {
  width: 100%;
  height: 100%;
  border: none;
  background: #000;
  object-fit: cover;
  display: block;
  filter: contrast(1.1) saturate(1.1);
}

.camera-slot .overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: linear-gradient(to bottom, rgba(5, 10, 20, 0.9), transparent);
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.camera-slot .stream-mode-badge {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--accent-cyan);
  background: rgba(100, 255, 218, 0.1);
  color: var(--accent-cyan);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 10px rgba(100, 255, 218, 0.2);
  backdrop-filter: blur(8px);
  z-index: 3;
  height: 1.8rem;
}

.camera-slot .stream-mode-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ff3b30;
  box-shadow: 0 0 8px #ff3b30;
  animation: pulse-rec 2s infinite;
}

.camera-slot .stream-mode-badge.hidden {
  display: none;
}

.camera-slot .connection-warning {
  position: absolute;
  top: 0.75rem;
  left: 5.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 196, 0, 0.4);
  background: rgba(255, 196, 0, 0.12);
  color: #ffe29a;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 12px rgba(255, 196, 0, 0.2);
  backdrop-filter: blur(8px);
  z-index: 3;
  height: 1.8rem;
  max-width: calc(100% - 6.5rem);
}

.camera-slot .connection-warning.hidden {
  display: none;
}

.camera-slot .connection-warning .warning-icon {
  font-size: 0.8rem;
  line-height: 1;
}

.camera-slot:hover .overlay {
  opacity: 1;
}

.camera-slot .camera-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(100, 255, 218, 0.3);
  letter-spacing: 0.05em;
}

.camera-slot .change-camera {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(100, 255, 218, 0.1);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transition: all 0.2s ease;
  z-index: 10;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}

.camera-slot:hover .change-camera {
  opacity: 1;
}

.camera-slot .change-camera:hover {
  background: var(--accent-purple);
  color: #fff;
  box-shadow: 0 0 15px var(--accent-purple);
}

.camera-slot .loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.camera-slot .loading::before {
  content: '';
  width: 40px;
  height: 40px;
  border: 2px solid var(--surface-hover);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  background: none;
}

.camera-slot .loading.hidden {
  display: none;
}

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

.camera-slot .error {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ff8080;
  text-align: center;
  background: rgba(255, 85, 85, 0.1);
  padding: 1rem 1.25rem;
  border-radius: 8px;
  border: 1px solid #ff5555;
  max-width: 85%;
  font-size: 0.8rem;
  line-height: 1.4;
}

.camera-slot .error.hidden {
  display: none;
}

/* Camera selector modal */
#camera-selector {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--glass-bg);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--accent-blue);
  box-shadow: 0 0 50px rgba(0, 229, 255, 0.2);
  z-index: 100;
  min-width: 320px;
  max-height: 80vh;
  overflow-y: auto;
  backdrop-filter: blur(12px);
}

#camera-selector.hidden {
  display: none;
}

#camera-selector h3 {
  margin-bottom: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

#camera-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

#camera-list button {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#camera-list button:hover {
  background: rgba(100, 255, 218, 0.05);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateX(5px);
}

#camera-list button.active {
  background: rgba(100, 255, 218, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(100, 255, 218, 0.1);
}

#camera-list button.active::after {
  content: '●';
  color: var(--accent-cyan);
  font-size: 0.8rem;
}

#close-selector {
  width: 100%;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 600;
}

#close-selector:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--text-primary);
}

/* Overlay backdrop */
.backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(5, 10, 20, 0.8);
  backdrop-filter: blur(4px);
  z-index: 99;
}

.backdrop.hidden {
  display: none;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-color);
}

/* Responsive: stack on small screens */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    gap: 1rem;
  }
  .camera-toggles {
    order: 3;
    flex-basis: 100%;
  }
  main {
    height: auto;
  }
  .grid {
    height: auto;
  }
  .grid,
  .layout-1, .layout-2, .layout-4, .layout-6, .layout-7 {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }
  .camera-slot {
    aspect-ratio: 16 / 9;
  }
}