:root {
  color-scheme: dark;
  --bg: #071017;
  --surface: #0d1922;
  --surface-strong: #12242f;
  --line: #2a3d49;
  --line-bright: #45606f;
  --text: #f2f5f3;
  --muted: #a8b7bc;
  --accent: #61d4be;
  --accent-dark: #092c28;
  --data: #5cbcff;
  --video: #c69cff;
  --power: #ffc45e;
  --works: #60d39f;
  --limited: #ffd166;
  --no-link: #ff7a86;
  --check: #82b8ff;
  --not-applicable: #aeb9bd;
  --waiting: #93a4aa;
  --focus: #fff4a8;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  background: var(--bg);
  overflow-x: hidden;
}

body {
  min-width: 0;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(rgba(97, 212, 190, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(97, 212, 190, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: 28px 28px;
  font-family:
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    -apple-system,
    sans-serif;
  font-size: 16px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

button,
select {
  color: inherit;
  font: inherit;
}

a {
  color: #9ce4d7;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #d8fff6;
}

a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  color: #06120f;
  background: var(--focus);
  font-weight: 800;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  min-width: 0;
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px clamp(16px, 3vw, 40px);
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header .prototype-breadcrumb {
  width: 100%;
  order: 3;
  color: var(--muted);
}

.site-name {
  flex: 0 0 auto;
  color: var(--text);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(12px, 2.2vw, 30px);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

main {
  width: min(1440px, 100%);
  min-width: 0;
  margin: 0 auto;
  padding: 28px clamp(16px, 3vw, 40px) 56px;
}

.page-heading {
  max-width: 920px;
}

.eyebrow,
.pane-number {
  margin: 0;
  color: var(--accent);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1 {
  max-width: 100%;
  margin: 7px 0 0;
  font-size: clamp(2rem, 3.2vw, 2.625rem);
  font-weight: 800;
  letter-spacing: 0.015em;
  line-height: 1.16;
}

.english-title {
  margin: 5px 0 0;
  color: var(--accent);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: clamp(0.8rem, 1.4vw, 1rem);
  font-weight: 700;
  letter-spacing: 0.07em;
}

.lead {
  max-width: 760px;
  margin: 14px 0 0;
  color: #cfdbde;
  line-height: 1.7;
}

.prototype-note {
  max-width: 1060px;
  margin: 18px 0;
  padding: 10px 14px;
  border-left: 3px solid var(--limited);
  color: #d9e1e3;
  background: rgba(255, 209, 102, 0.07);
  font-size: 0.88rem;
}

.prototype-note strong {
  color: #ffe49b;
}

.checker-grid {
  display: grid;
  min-width: 0;
  margin: 0;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 0.86fr) minmax(360px, 1.28fr);
  gap: 14px;
  align-items: start;
}

.tool-pane {
  min-width: 0;
  border: 1px solid var(--line);
  background: rgba(13, 25, 34, 0.96);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.18);
}

.pane-heading {
  min-width: 0;
  padding: 17px 18px 15px;
  border-bottom: 1px solid var(--line);
}

.pane-heading h2 {
  margin: 2px 0 0;
  font-size: 1.12rem;
  line-height: 1.3;
}

.pane-heading > p:last-child,
.result-heading > div > p:last-child {
  margin: 1px 0 0;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.control-block {
  min-width: 0;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.control-block label {
  display: flex;
  min-width: 0;
  margin-bottom: 10px;
  align-items: center;
  gap: 10px;
}

.step-number {
  display: inline-grid;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border: 1px solid var(--line-bright);
  color: var(--accent);
  background: var(--surface-strong);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.73rem;
  font-weight: 800;
  place-items: center;
}

.control-block label strong,
.control-block label small {
  display: block;
}

.control-block label strong {
  line-height: 1.2;
}

.control-block label small {
  margin-top: 2px;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.64rem;
  letter-spacing: 0.1em;
}

select {
  width: 100%;
  max-width: 100%;
  min-height: 46px;
  padding: 9px 36px 9px 11px;
  border: 1px solid var(--line-bright);
  border-radius: 0;
  color: var(--text);
  background-color: #08131a;
  cursor: pointer;
}

select:disabled {
  color: #7f9097;
  border-color: #253640;
  cursor: not-allowed;
  opacity: 1;
}

.control-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.form-actions {
  display: grid;
  min-width: 0;
  padding: 18px;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.8fr);
  gap: 9px;
}

.form-actions button {
  min-width: 0;
  min-height: 47px;
  padding: 9px 12px;
  border: 1px solid var(--accent);
  border-radius: 0;
  font-weight: 800;
  cursor: pointer;
}

.form-actions button span {
  display: block;
  margin-top: 1px;
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.57rem;
  letter-spacing: 0.09em;
}

.primary-button {
  color: #061613;
  background: var(--accent);
}

.secondary-button {
  color: var(--accent);
  background: transparent;
}

.form-actions button:disabled {
  border-color: #415158;
  color: #7f9097;
  background: #18252b;
  cursor: not-allowed;
}

.app-status {
  min-height: 2.5em;
  margin: 0;
  padding: 0 18px 17px;
  color: var(--muted);
  font-size: 0.75rem;
}

.app-status.is-error {
  color: #ffb2b9;
}

.result-heading {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.overall-status {
  display: flex;
  min-width: 0;
  max-width: 55%;
  margin: 0;
  padding: 7px 9px;
  border: 1px solid currentColor;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  line-height: 1.2;
}

.overall-status strong,
.overall-status small {
  display: block;
}

.overall-status small {
  margin-top: 2px;
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.57rem;
  letter-spacing: 0.08em;
}

.status-symbol {
  font-size: 1.05rem;
  font-weight: 900;
}

.is-works {
  color: var(--works);
}

.is-limited {
  color: var(--limited);
}

.is-no-link {
  color: var(--no-link);
}

.is-check-specs {
  color: var(--check);
}

.is-not-applicable {
  color: var(--not-applicable);
}

.is-waiting {
  color: var(--waiting);
}

.link-diagram {
  display: grid;
  min-width: 0;
  padding: 15px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 5px;
  align-items: stretch;
}

.link-node {
  display: flex;
  min-width: 0;
  min-height: 68px;
  padding: 8px 6px;
  border: 1px solid var(--line-bright);
  background: #08131a;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
}

.link-node small {
  color: var(--accent);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: 0.09em;
}

.link-node strong {
  display: block;
  max-width: 100%;
  margin-top: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.35;
}

.link-arrow {
  display: grid;
  color: var(--accent);
  font-size: 1.15rem;
  font-weight: 900;
  place-items: center;
}

.channel-results {
  min-width: 0;
}

.channel-row {
  display: grid;
  min-width: 0;
  padding: 12px 15px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 12px;
  align-items: center;
}

.channel-row::before {
  position: absolute;
  content: "";
}

#data-result {
  box-shadow: inset 3px 0 0 var(--data);
}

#video-result {
  box-shadow: inset 3px 0 0 var(--video);
}

#power-result {
  box-shadow: inset 3px 0 0 var(--power);
}

#data-result.is-not-applicable,
#video-result.is-not-applicable,
#power-result.is-not-applicable {
  color: var(--not-applicable);
  border-bottom-color: var(--not-applicable);
  background: rgba(174, 185, 189, 0.08);
  box-shadow: inset 3px 0 0 var(--not-applicable);
}

.channel-label {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 9px;
}

.channel-symbol {
  display: inline-grid;
  width: 31px;
  height: 31px;
  flex: 0 0 31px;
  border: 1px solid currentColor;
  font-weight: 900;
  place-items: center;
}

#data-result .channel-symbol {
  color: var(--data);
}

#video-result .channel-symbol {
  color: var(--video);
}

#power-result .channel-symbol {
  color: var(--power);
}

#data-result.is-not-applicable .channel-symbol,
#video-result.is-not-applicable .channel-symbol,
#power-result.is-not-applicable .channel-symbol,
.channel-row.is-not-applicable .channel-label strong,
.channel-row.is-not-applicable .channel-label small,
.channel-row.is-not-applicable .channel-value strong,
.channel-row.is-not-applicable .channel-value span {
  color: var(--not-applicable);
}

.channel-label strong,
.channel-label small {
  display: block;
}

.channel-label strong {
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
}

.channel-label small {
  color: var(--muted);
  font-size: 0.67rem;
}

.channel-value {
  min-width: 0;
  text-align: right;
}

.channel-value strong,
.channel-value span {
  display: block;
}

.channel-value strong {
  color: var(--text);
  font-size: 0.84rem;
  line-height: 1.35;
}

.channel-value span {
  margin-top: 3px;
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.59rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.result-details {
  min-width: 0;
  padding: 0 15px;
}

.result-details section {
  min-width: 0;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.result-details h3 {
  margin: 0 0 6px;
  color: #d9e8e7;
  font-size: 0.76rem;
}

.result-details ul {
  margin: 0;
  padding-left: 1.25em;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.55;
}

.result-details li + li {
  margin-top: 3px;
}

.ruleset-line {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 11px 15px;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.6rem;
  flex-wrap: wrap;
  gap: 3px 6px;
}

.ruleset-line strong {
  color: #d7e4e5;
}

.important-notice,
.reference-section {
  min-width: 0;
  margin-top: 18px;
  padding: 17px 19px;
  border: 1px solid var(--line);
  background: rgba(13, 25, 34, 0.84);
}

.important-notice {
  border-left: 3px solid var(--limited);
}

.important-notice h2,
.reference-section h2 {
  margin: 0 0 7px;
  font-size: 0.95rem;
}

.important-notice p {
  margin: 0;
  color: #bdcacc;
  font-size: 0.79rem;
}

.important-notice p + p {
  margin-top: 7px;
}

.important-notice strong {
  color: #ffe49b;
}

.reference-section ul {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  gap: 7px 18px;
  list-style: none;
}

.reference-section li {
  min-width: 0;
  font-size: 0.72rem;
}

.page-footer {
  width: min(1440px, 100%);
  min-width: 0;
  margin: 0 auto;
  padding: 20px clamp(16px, 3vw, 40px) 38px;
  border-top: 1px solid var(--line);
  color: #82959b;
  font-size: 0.67rem;
}

.page-footer p {
  margin: 0;
}

.page-footer p + p {
  margin-top: 5px;
}

.page-footer .public-site-footer-nav {
  margin-top: 14px;
}

.noscript-message {
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 20;
  max-width: calc(100% - 24px);
  margin: 0;
  padding: 10px 14px;
  border: 1px solid var(--no-link);
  color: #fff;
  background: #411820;
}

@media (max-width: 1040px) {
  .checker-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .result-pane {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .site-header {
    display: block;
    padding-top: 11px;
    padding-bottom: 11px;
  }

  .site-nav {
    margin-top: 8px;
    justify-content: flex-start;
    gap: 8px 14px;
    flex-wrap: wrap;
    font-size: 0.68rem;
  }

  main {
    padding-top: 21px;
    padding-bottom: 40px;
  }

  h1 {
    font-size: 2rem;
    line-height: 1.18;
  }

  .lead {
    font-size: 0.88rem;
  }

  .checker-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .result-pane {
    grid-column: auto;
  }

  .pane-heading,
  .control-block {
    padding-right: 14px;
    padding-left: 14px;
  }

  .form-actions {
    padding: 14px;
  }

  .app-status {
    padding-right: 14px;
    padding-left: 14px;
  }
}

@media (max-width: 420px) {
  .prototype-note {
    margin-top: 15px;
    margin-bottom: 15px;
  }

  .result-heading {
    display: block;
  }

  .overall-status {
    max-width: 100%;
    width: max-content;
    margin-top: 10px;
  }

  .link-diagram {
    padding-right: 10px;
    padding-left: 10px;
    gap: 3px;
  }

  .link-node {
    min-height: 64px;
    padding-right: 3px;
    padding-left: 3px;
  }

  .link-node strong {
    font-size: 0.65rem;
  }

  .link-arrow {
    font-size: 0.88rem;
  }

  .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 7px;
  }

  .channel-value {
    padding-left: 40px;
    text-align: left;
  }

  .form-actions {
    grid-template-columns: minmax(0, 1fr);
  }

  .reference-section ul {
    display: block;
  }

  .reference-section li + li {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}