:root {
  color-scheme: light;
  --background: #f4f6f8;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border: #dfe3e8;
  --border-strong: #c7cdd4;
  --text: #18202a;
  --text-muted: #66717f;
  --primary: #1f4b7a;
  --primary-hover: #183d65;
  --neutral-status: #64748b;
  --level-0: #2f6f55;
  --level-1: #9a6a12;
  --level-2: #a34d1f;
  --level-3: #a63131;
  --danger-background: #fff5f5;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.05);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  font-size: 16px;
  background: var(--background);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background: var(--background);
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 32px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 24px;
}

.heading-group {
  max-width: 720px;
}

.product-label,
.section-label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

h2 {
  margin-bottom: 0;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.heading-group p {
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.service-status {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  background: var(--surface);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}

.service-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.service-status.is-online { color: var(--level-0); }
.service-status.is-offline { color: var(--level-3); }
.service-status.is-checking { color: var(--neutral-status); }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.85fr);
  gap: 20px;
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.camera-panel,
.result-panel {
  padding: 20px;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.privacy-label {
  flex: 0 0 auto;
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  background: var(--surface-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.video-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 2px solid var(--border-strong);
  border-radius: 9px;
  background: #101317;
  transition: border-color 160ms ease;
}

.video-frame[data-level="0"] { border-color: var(--level-0); }
.video-frame[data-level="1"] { border-color: var(--level-1); }
.video-frame[data-level="2"] { border-color: var(--level-2); }
.video-frame[data-level="3"] { border-color: var(--level-3); }

#cameraVideo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 24px;
  color: #aeb6bf;
  background: #171b20;
  text-align: center;
}

.video-placeholder[hidden] {
  display: none;
}

.video-placeholder strong {
  color: #f3f4f6;
  font-size: 1rem;
  font-weight: 600;
}

.video-placeholder small {
  font-size: 0.82rem;
}

.camera-symbol {
  position: relative;
  width: 46px;
  height: 34px;
  margin-bottom: 10px;
  border: 2px solid #98a2ad;
  border-radius: 7px;
}

.camera-symbol::after {
  position: absolute;
  top: 8px;
  right: -11px;
  width: 10px;
  height: 16px;
  border: 2px solid #98a2ad;
  border-left: 0;
  border-radius: 0 4px 4px 0;
  content: "";
}

.camera-symbol span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  border: 2px solid #98a2ad;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.video-information {
  position: absolute;
  right: 10px;
  bottom: 10px;
  left: 10px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  pointer-events: none;
}

.video-information span {
  padding: 5px 8px;
  border-radius: 5px;
  color: #f8fafc;
  background: rgba(15, 18, 22, 0.72);
  font-size: 0.69rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  backdrop-filter: blur(4px);
}

.camera-controls {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.control-button {
  min-height: 44px;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 650;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, opacity 120ms ease;
}

.control-button:focus-visible {
  outline: 3px solid rgba(31, 75, 122, 0.2);
  outline-offset: 2px;
}

.control-button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.primary-button {
  color: #ffffff;
  background: var(--primary);
}

.primary-button:hover:not(:disabled) {
  background: var(--primary-hover);
}

.secondary-button {
  border-color: var(--border-strong);
  color: var(--text);
  background: var(--surface);
}

.secondary-button:hover:not(:disabled) {
  background: var(--surface-muted);
}

.system-message {
  min-height: 21px;
  margin: 12px 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.system-message.is-error {
  color: var(--level-3);
}

.result-panel {
  border-top: 3px solid var(--neutral-status);
}

.result-panel[data-level="0"] { border-top-color: var(--level-0); }
.result-panel[data-level="1"] { border-top-color: var(--level-1); }
.result-panel[data-level="2"] { border-top-color: var(--level-2); }
.result-panel[data-level="3"] { border-top-color: var(--level-3); }

.result-heading {
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.level-badge {
  flex: 0 0 auto;
  padding: 5px 9px;
  border-radius: 6px;
  color: #ffffff;
  background: var(--neutral-status);
  font-size: 0.72rem;
  font-weight: 700;
}

.result-panel[data-level="0"] .level-badge { background: var(--level-0); }
.result-panel[data-level="1"] .level-badge { background: var(--level-1); }
.result-panel[data-level="2"] .level-badge { background: var(--level-2); }
.result-panel[data-level="3"] .level-badge { background: var(--level-3); }

.result-summary {
  display: grid;
  grid-template-columns: 10px 1fr;
  gap: 10px;
  align-items: start;
  min-height: 54px;
  margin-bottom: 14px;
  padding: 12px;
  border-radius: 8px;
  background: var(--surface-muted);
}

.result-summary p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.status-indicator {
  width: 9px;
  height: 9px;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--neutral-status);
}

.result-panel[data-level="0"] .status-indicator { background: var(--level-0); }
.result-panel[data-level="1"] .status-indicator { background: var(--level-1); }
.result-panel[data-level="2"] .status-indicator { background: var(--level-2); }
.result-panel[data-level="3"] .status-indicator { background: var(--level-3); }

.metrics {
  margin: 0;
}

.metric-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid #edf0f3;
}

.metric-row:last-child {
  border-bottom: 0;
}

.metric-row dt {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
}

.metric-row dd {
  margin: 0;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.collection-note {
  margin: 14px 0 0;
  padding: 10px 11px;
  border: 1px solid #d9e2ec;
  border-radius: 7px;
  color: #526477;
  background: #f5f8fb;
  font-size: 0.79rem;
}

.level-section {
  margin-top: 20px;
  padding: 20px;
}

.level-section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 16px;
}

.level-section-heading p {
  max-width: 430px;
  margin-bottom: 0;
  color: var(--text-muted);
  font-size: 0.82rem;
  text-align: right;
}

.level-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}

.level-item {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 14px;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.level-item:last-child {
  border-right: 0;
}

.level-number {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
}

.level-item strong,
.level-item small {
  display: block;
}

.level-item strong {
  font-size: 0.84rem;
  font-weight: 650;
}

.level-item small {
  margin-top: 2px;
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1.3;
}

.level-zero .level-number { color: var(--level-0); }
.level-one .level-number { color: var(--level-1); }
.level-two .level-number { color: var(--level-2); }
.level-three .level-number { color: var(--level-3); }

.usage-note {
  margin-top: 18px;
  padding: 0 2px;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.usage-note strong {
  color: var(--text);
  font-weight: 650;
}

@media (max-width: 900px) {
  .app-shell {
    width: min(100% - 28px, 760px);
    padding-top: 28px;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    gap: 14px;
  }

  .service-status {
    align-self: flex-start;
  }

  .level-list {
    grid-template-columns: 1fr 1fr;
  }

  .level-item {
    border-bottom: 1px solid var(--border);
  }

  .level-item:nth-child(2) {
    border-right: 0;
  }

  .level-item:nth-child(3),
  .level-item:nth-child(4) {
    border-bottom: 0;
  }
}

@media (max-width: 600px) {
  .app-shell {
    width: 100%;
    padding: 20px 12px 24px;
  }

  .page-header { margin-bottom: 18px; }

  .heading-group p {
    font-size: 0.9rem;
  }

  .workspace {
    gap: 12px;
  }

  .camera-panel,
  .result-panel,
  .level-section {
    padding: 14px;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
  }

  .panel-heading {
    margin-bottom: 12px;
  }

  .privacy-label {
    display: none;
  }

  .camera-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .control-button {
    width: 100%;
    padding-inline: 10px;
  }

  .metric-row {
    padding: 9px 0;
  }

  .level-section {
    margin-top: 12px;
  }

  .level-section-heading {
    display: block;
  }

  .level-section-heading p {
    margin-top: 8px;
    text-align: left;
  }

  .level-list {
    grid-template-columns: 1fr;
  }

  .level-item,
  .level-item:nth-child(2),
  .level-item:nth-child(3) {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .level-item:last-child {
    border-bottom: 0;
  }

  .usage-note {
    margin-top: 14px;
  }
}

@media (max-width: 380px) {
  .camera-controls {
    grid-template-columns: 1fr;
  }

  .video-information {
    right: 7px;
    bottom: 7px;
    left: 7px;
  }
}