:root {
  --bg: #14181c;
  --panel: #1c2227;
  --text: #e8ecef;
  --muted: #9aa5ac;
  --border: #303840;
  --idle: #6b7280;
  --countdown: #f5a623;
  --armed: #2dd4bf;
  --alarm: #ef4444;
  --focus: #7dd3fc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 1.5rem;
  max-width: 40rem;
  margin-inline: auto;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

header p {
  color: var(--muted);
}

h1 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

h2 {
  font-size: 1.1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

section {
  margin-block: 1.75rem;
}

.hint {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: -0.5rem;
}

.status {
  font-size: 1.3rem;
  font-weight: 600;
  padding: 1rem;
  border-radius: 0.5rem;
  text-align: center;
  border: 2px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.status--idle {
  background: var(--panel);
  color: var(--idle);
  border-color: var(--idle);
}

.status--countdown,
.status--calibrating {
  background: var(--panel);
  color: var(--countdown);
  border-color: var(--countdown);
}

.status--armed {
  background: var(--panel);
  color: var(--armed);
  border-color: var(--armed);
}

.status--alarm {
  background: var(--alarm);
  color: #fff;
  border-color: var(--alarm);
}

.diagnostics {
  min-height: 1.2rem;
  margin-top: 0.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--countdown);
}

.diagnostics:empty {
  margin-top: 0;
}

.camera-preview {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
}

.camera-preview video,
.camera-preview canvas {
  max-width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.camera-preview video {
  max-width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-block: 0.75rem;
}

.field label {
  font-weight: 500;
}

.field--inline {
  flex-direction: row;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.field--inline label {
  font-weight: 400;
}

#calibration-panel {
  margin-top: 0.75rem;
  padding: 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

#calibration-status {
  margin: 0 0 0.75rem;
}

#calibration-yesno {
  display: flex;
  gap: 0.75rem;
}

#calibration-discard {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.field--checkbox {
  flex-direction: row;
  align-items: center;
}

.field--checkbox input {
  width: 1.1rem;
  height: 1.1rem;
}

input[type="range"] {
  width: 100%;
  max-width: 20rem;
}

input[type="text"],
input[type="url"],
select,
input[type="file"] {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 0.35rem;
  padding: 0.5rem;
  max-width: 24rem;
}

button {
  background: var(--armed);
  color: #06201c;
  border: none;
  border-radius: 0.4rem;
  padding: 0.6rem 1.4rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button.is-active {
  background: var(--alarm);
  color: #fff;
}

.controls-row {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (prefers-reduced-motion: reduce) {
  .status {
    transition: none;
  }
}