:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1b1d21;
  --muted: #6b7280;
  --border: #d9dce1;
  --accent: #1d4ed8;
  --accent-text: #ffffff;
  --ok: #047857;
  --ok-bg: #e7f6ef;
  --warn: #92400e;
  --warn-bg: #fdf3e1;
  --error: #b91c1c;
  --error-bg: #fdecec;
  --info: #1e40af;
  --info-bg: #e8effd;
  --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1b1e24;
    --text: #e6e8eb;
    --muted: #9aa1ab;
    --border: #2f343c;
    --accent: #3b82f6;
    --ok: #34d399;
    --ok-bg: #0f2a21;
    --warn: #fbbf24;
    --warn-bg: #2d2311;
    --error: #f87171;
    --error-bg: #301616;
    --info: #93c5fd;
    --info-bg: #15223a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

h1 {
  font-size: 1.4rem;
  margin: 0;
}

h2 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 0.9rem;
  margin: 0.75rem 0 0.25rem;
  color: var(--muted);
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

a {
  color: var(--accent);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.notice {
  margin: 1rem 1.25rem 0;
  padding: 0.75rem 1rem;
  border: 1px solid var(--warn);
  background: var(--warn-bg);
  border-radius: 8px;
}

.notice p {
  margin: 0.25rem 0;
}

.notice .links a {
  margin-right: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 1rem 1.25rem;
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  min-width: 0;
}

.span-2 {
  grid-column: 1 / -1;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin: 0.75rem 0;
}

.buttons {
  gap: 0.75rem;
}

button {
  font: inherit;
  min-height: 48px;
  padding: 0 1.25rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

input[type='number'] {
  font: inherit;
  width: 9rem;
  min-height: 44px;
  padding: 0 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

.field {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.check input {
  width: 22px;
  height: 22px;
}

.idm-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.idm-box .label {
  color: var(--muted);
  font-size: 0.85rem;
}

.idm {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  letter-spacing: 0.08em;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.read-state {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 600;
}

.result,
.read-state,
.badge {
  color: var(--muted);
}

[data-tone='ok'] {
  color: var(--ok);
  background: var(--ok-bg);
}

[data-tone='warn'] {
  color: var(--warn);
  background: var(--warn-bg);
}

[data-tone='error'] {
  color: var(--error);
  background: var(--error-bg);
}

[data-tone='info'],
[data-tone='wait'] {
  color: var(--info);
  background: var(--info-bg);
}

.badge {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-weight: 600;
  white-space: nowrap;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.history {
  font-family: var(--mono);
  font-size: 0.85rem;
}

.json,
.log {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.log {
  max-height: 320px;
  overflow: auto;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  vertical-align: middle;
  padding: 0.45rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

td.result {
  border-radius: 4px;
}

.env {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.25rem 1rem;
  margin: 0;
  font-size: 0.85rem;
}

.env dt {
  color: var(--muted);
}

.env dd {
  margin: 0;
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.camera {
  width: 100%;
  max-width: 480px;
  margin-top: 0.75rem;
  border-radius: 8px;
  background: #000;
}

.footer {
  padding: 1rem 1.25rem 2rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.antenna-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
}

.antenna-frame,
.antenna-cross {
  position: absolute;
  transform: translate(-50%, -50%);
}

.antenna-frame {
  border: 3px dashed #e11d48;
  border-radius: 10px;
  background: rgba(225, 29, 72, 0.08);
}

.antenna-cross {
  width: 28px;
  height: 28px;
  background:
    linear-gradient(#e11d48, #e11d48) center / 2px 100% no-repeat,
    linear-gradient(#e11d48, #e11d48) center / 100% 2px no-repeat;
}