:root {
  color-scheme: light;
  --device-background: #f4f6f8;
  --device-surface: #ffffff;
  --device-surface-muted: #f6f8fa;
  --device-border: #d0d7de;
  --device-text: #1f2328;
  --device-muted: #57606a;
  --device-accent: #0969da;
  --device-accent-hover: #0757b5;
  --device-success: #1a7f37;
  --device-warning: #9a6700;
  --device-danger: #cf222e;
  --device-info-background: #ddf4ff;
  --device-info-border: #b6e3ff;
  --device-info-text: #0550ae;
  --device-warning-background: #fff8c5;
  --device-warning-border: #d4a72c;
  --device-danger-background: #ffebe9;
  --device-danger-border: #ff8182;
  --device-success-background: #dafbe1;
  --device-primary-text: #ffffff;
  --device-focus-ring: rgba(9, 105, 218, .28);
  --device-shadow: 0 14px 36px rgba(31, 35, 40, .08);
  --device-panel-radius: 12px;
  --device-control-radius: 8px;
  --device-section-gap: 16px;
  --device-content-max-width: 1240px;
  --device-page-gutter: 40px;
  --device-page-gutter-mobile: 24px;
  --device-page-padding: 40px;
  --device-page-padding-mobile: 24px;
  --device-panel-padding: 18px;
  --device-panel-padding-mobile: 14px;
  --device-control-height: 38px;
  --device-item-copy-size: 28px;
  --device-table-min-width: 620px;
  --device-summary-columns: 4;
  --device-detail-columns: 3;
  --device-label-font-size: .82rem;
  --device-emphasis-weight: 700;
  --device-pill-radius: 999px;
}

/* 基本レイアウト */
.device-info-tool,
.device-info-tool * {
  box-sizing: border-box;
}

body.device-info-page {
  min-height: 100vh;
  margin: 0;
  color: var(--device-text);
  background: var(--device-background);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.device-info-main {
  width: min(var(--device-content-max-width), calc(100% - var(--device-page-gutter)));
  margin: 0 auto;
  padding: var(--device-page-padding) 0;
}

/* ページ見出し */
.device-info-page-header {
  margin-bottom: 18px;
}

.device-info-page-header h1 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
}

.device-info-page-header p {
  margin: 8px 0 0;
  color: var(--device-muted);
  line-height: 1.7;
}

.device-info-page-header .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--device-muted);
  font-size: .9rem;
}

.device-info-tool a {
  color: var(--device-accent);
  font-weight: var(--device-emphasis-weight);
  text-decoration: none;
}

.device-info-tool a:hover,
.device-info-tool a:focus-visible {
  text-decoration: underline;
}

/* 共通パネル */
.device-info-notice,
.device-info-toolbar,
.device-info-summary-grid,
.device-info-panel {
  margin-bottom: var(--device-section-gap);
  background: var(--device-surface);
  border: 1px solid var(--device-border);
  border-radius: var(--device-panel-radius);
  box-shadow: var(--device-shadow);
}

.device-info-notice {
  padding: 12px 14px;
  color: var(--device-info-text);
  background: var(--device-info-background);
  border-color: var(--device-info-border);
  line-height: 1.65;
}

/* 操作欄 */
.device-info-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
}

.device-info-status {
  margin: 0;
  color: var(--device-muted);
  font-size: .92rem;
}

.device-info-status.success {
  color: var(--device-success);
}

.device-info-status.error {
  color: var(--device-danger);
}

.device-info-status.warning {
  color: var(--device-warning);
}

.device-info-status.success,
.device-info-status.error,
.device-info-status.warning {
  font-weight: var(--device-emphasis-weight);
}

.device-info-copy-helper {
  position: fixed;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.device-info-toolbar-controls,
.device-info-panel-heading {
  display: flex;
  align-items: center;
  gap: 8px;
}

.device-info-toolbar-controls {
  justify-content: flex-end;
  flex-wrap: wrap;
}

.device-info-safe-mode {
  display: inline-flex;
  align-items: center;
  min-height: var(--device-control-height);
  gap: 7px;
  padding: 7px 10px;
  border: 1px solid var(--device-border);
  border-radius: var(--device-control-radius);
  background: var(--device-surface-muted);
  font-weight: 600;
}

.device-info-safe-mode input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--device-accent);
}

.device-info-tool button {
  min-height: var(--device-control-height);
  padding: 7px 13px;
  color: var(--device-text);
  background: var(--device-surface-muted);
  border: 1px solid var(--device-border);
  border-radius: var(--device-control-radius);
  font: inherit;
  font-weight: var(--device-emphasis-weight);
  cursor: pointer;
}

.device-info-tool button:hover,
.device-info-tool button:focus-visible {
  border-color: var(--device-accent);
}

.device-info-tool button:focus-visible,
.device-info-safe-mode:focus-within,
.device-info-tool a:focus-visible {
  outline: 3px solid var(--device-focus-ring);
  outline-offset: 2px;
}

.device-info-tool button:disabled {
  cursor: not-allowed;
  opacity: .5;
}

.device-info-tool .device-info-primary-button {
  color: var(--device-primary-text);
  background: var(--device-accent);
  border-color: var(--device-accent);
}

.device-info-tool .device-info-primary-button:hover,
.device-info-tool .device-info-primary-button:focus-visible {
  background: var(--device-accent-hover);
}

/* 概要 */
.device-info-summary-grid {
  display: grid;
  grid-template-columns: repeat(var(--device-summary-columns), minmax(0, 1fr));
  margin-top: 0;
  overflow: hidden;
}

.device-info-summary-card {
  min-width: 0;
  padding: 16px;
  border-right: 1px solid var(--device-border);
}

.device-info-summary-card:last-child {
  border-right: 0;
}

.device-info-summary-card-highlight {
  box-shadow: inset 4px 0 var(--device-accent);
}

.device-info-summary-card dt,
.device-info-item dt,
.device-info-capability-table th {
  color: var(--device-muted);
  font-size: var(--device-label-font-size);
  font-weight: var(--device-emphasis-weight);
}

.device-info-summary-card dd {
  margin: 7px 0 0;
  overflow-wrap: anywhere;
  font-size: 1.05rem;
  font-weight: var(--device-emphasis-weight);
}

/* 詳細情報 */
.device-info-panel {
  padding: var(--device-panel-padding);
}

.device-info-panel-heading {
  justify-content: space-between;
  margin-bottom: 14px;
}

.device-info-panel-heading h2,
.device-info-limitations h2 {
  margin: 0;
  font-size: 1.15rem;
}

.device-info-panel-heading p {
  margin: 5px 0 0;
  color: var(--device-muted);
  line-height: 1.55;
}

.device-info-grid {
  display: grid;
  grid-template-columns: repeat(var(--device-detail-columns), minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--device-border);
  border-left: 1px solid var(--device-border);
}

.device-info-item {
  position: relative;
  min-width: 0;
  min-height: 92px;
  padding: 13px 42px 13px 14px;
  background: var(--device-surface);
  border-right: 1px solid var(--device-border);
  border-bottom: 1px solid var(--device-border);
}

.device-info-item dd {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
  margin: 7px 0 0;
}

.device-info-item [data-value] {
  max-width: 100%;
  overflow-wrap: anywhere;
  line-height: 1.45;
}

.device-info-accuracy,
.device-info-capability-status {
  display: inline-flex;
  border-radius: var(--device-pill-radius);
  font-weight: var(--device-emphasis-weight);
}

.device-info-accuracy {
  align-items: center;
  min-height: 20px;
  padding: 1px 7px;
  color: var(--device-muted);
  background: var(--device-surface-muted);
  border: 1px solid var(--device-border);
  font-size: .72rem;
}

.device-info-accuracy.approximate {
  color: var(--device-warning);
  background: var(--device-warning-background);
  border-color: var(--device-warning-border);
}

.device-info-accuracy.unavailable {
  color: var(--device-danger);
  background: var(--device-danger-background);
  border-color: var(--device-danger-border);
}

.device-info-item-copy {
  position: absolute;
  top: 10px;
  right: 9px;
  width: var(--device-item-copy-size);
  min-height: var(--device-item-copy-size);
  padding: 0;
  color: var(--device-muted);
  background: transparent;
  font-size: .76rem;
}

/* Web機能対応表 */
.device-info-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--device-border);
}

.device-info-capability-table {
  width: 100%;
  min-width: var(--device-table-min-width);
  border-collapse: collapse;
  text-align: left;
}

.device-info-capability-table th,
.device-info-capability-table td {
  padding: 11px 13px;
  border-bottom: 1px solid var(--device-border);
  vertical-align: top;
}

.device-info-capability-table tr:last-child td {
  border-bottom: 0;
}

.device-info-capability-table th {
  background: var(--device-surface-muted);
}

.device-info-capability-table th:nth-child(2),
.device-info-capability-table td:nth-child(2) {
  width: 120px;
}

.device-info-capability-status {
  padding: 2px 8px;
  font-size: .78rem;
}

.device-info-capability-status.supported {
  color: var(--device-success);
  background: var(--device-success-background);
}

.device-info-capability-status.unsupported {
  color: var(--device-danger);
  background: var(--device-danger-background);
}

.device-info-capability-table td:last-child {
  color: var(--device-muted);
}

.device-info-limitations ul {
  margin: 12px 0 0;
  padding-left: 1.4rem;
  line-height: 1.75;
}

/* レスポンシブ調整 */
@media (max-width: 940px) {
  :root {
    --device-summary-columns: 2;
    --device-detail-columns: 2;
  }

  .device-info-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .device-info-toolbar-controls {
    justify-content: flex-start;
  }

  .device-info-summary-card:nth-child(2) {
    border-right: 0;
  }

  .device-info-summary-card:nth-child(-n + 2) {
    border-bottom: 1px solid var(--device-border);
  }
}

@media (max-width: 640px) {
  :root {
    --device-summary-columns: 1;
    --device-detail-columns: 1;
  }

  .device-info-main {
    width: min(100% - var(--device-page-gutter-mobile), var(--device-content-max-width));
    padding: var(--device-page-padding-mobile) 0;
  }

  .device-info-summary-card,
  .device-info-summary-card:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--device-border);
  }

  .device-info-summary-card:last-child {
    border-bottom: 0;
  }

  .device-info-panel {
    padding: var(--device-panel-padding-mobile);
  }

  .device-info-panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .device-info-toolbar-controls,
  .device-info-toolbar-controls > *,
  .device-info-panel-heading button {
    width: 100%;
  }

  .device-info-safe-mode {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .device-info-tool * {
    scroll-behavior: auto;
  }
}