:root {
  color-scheme: dark;
  --bg: #0e1213;
  --panel: #171d1f;
  --panel-deep: #111719;
  --line: #344246;
  --text: #eef5f1;
  --muted: #a8b8b3;
  --faint: #73827e;
  --accent: #75c7d7;
  --keep: #4fd08b;
  --check: #f1c55e;
  --replace: #ff7175;
  --keep-bg: rgba(79, 208, 139, .13);
  --check-bg: rgba(241, 197, 94, .14);
  --replace-bg: rgba(255, 113, 117, .14);
  font-family: "Segoe UI", "Hiragino Sans", "Yu Gothic", Meiryo, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-width: 0; }
body {
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 88% 4%, rgba(117, 199, 215, .13), transparent 28%),
    linear-gradient(135deg, rgba(79, 208, 139, .05), transparent 36%),
    var(--bg);
}
button, select { font: inherit; }
a { color: var(--accent); }
h1, h2, h3, p, li, option { overflow-wrap: anywhere; }

.shell {
  width: min(1440px, calc(100% - 28px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 320px);
  gap: 18px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(23, 29, 31, .92);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .34);
}
.kicker {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: .75rem;
  line-height: 1.4;
  letter-spacing: .04em;
}
h1 { margin: 0; line-height: 1.15; letter-spacing: 0; }
h1 > span { display: block; font-size: 2.5rem; letter-spacing: 0; }
h1 > small {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0;
}
.lead { max-width: 820px; margin: 11px 0 0; color: var(--muted); font-size: 1.02rem; line-height: 1.65; }
.hero-device { display: block; width: 100%; min-height: 150px; border: 1px solid var(--line); background: #0b0f10; }
.hero-device text { fill: var(--text); font-size: 12px; font-weight: 700; letter-spacing: .04em; }
.hero-target { fill: rgba(117, 199, 215, .14); stroke: var(--accent); stroke-width: 2; }
.hero-wire { fill: none; stroke: #59686b; stroke-width: 3; stroke-linecap: round; }
.hero-node { stroke-width: 2; }
.hero-node.keep { fill: var(--keep-bg); stroke: var(--keep); }
.hero-node.check { fill: var(--check-bg); stroke: var(--check); }
.hero-node.replace { fill: var(--replace-bg); stroke: var(--replace); }

.notice, .panel, .foot { border: 1px solid var(--line); background: rgba(23, 29, 31, .92); }
.notice {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 4px solid var(--check);
  color: var(--muted);
  line-height: 1.75;
}
.data-status {
  margin-top: 16px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  background: rgba(17, 23, 25, .9);
  color: var(--muted);
  line-height: 1.55;
}
.data-status.loading { border-color: var(--check); color: #ffe29b; }
.data-status.ok { border-color: var(--keep); color: #bdf5d3; }
.data-status.error { border-color: var(--replace); color: #ffc0c2; }

.simulator-grid {
  display: grid;
  grid-template-columns: minmax(280px, .9fr) minmax(280px, .9fr) minmax(360px, 1.2fr);
  gap: 16px;
  align-items: start;
  margin-top: 16px;
}
.panel { min-width: 0; padding: 18px; }
.panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.panel h2 { margin: 0; font-size: 1.22rem; line-height: 1.35; }
.panel h3 { margin: 0; }
.panel-copy { margin: 10px 0 16px; color: var(--muted); font-size: .9rem; line-height: 1.65; }
.reset-button {
  min-height: 40px;
  padding: 7px 11px;
  border: 1px solid var(--accent);
  background: rgba(117, 199, 215, .08);
  color: var(--text);
  cursor: pointer;
}
.reset-button:hover { background: rgba(117, 199, 215, .16); }
.reset-button:focus-visible, .target-kind:focus-visible, .target-card:focus-visible, select:focus-visible, .chain-part:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.current-fields { display: grid; gap: 10px; }
.current-fields label { display: grid; grid-template-columns: 112px minmax(0, 1fr); gap: 10px; align-items: center; }
.current-fields label > span { color: var(--muted); font-size: .82rem; line-height: 1.3; }
.current-fields select {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 7px 34px 7px 10px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel-deep);
  color: var(--text);
}

.target-kinds { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.target-kind {
  min-height: 48px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}
.target-kind span { display: block; color: var(--text); font-weight: 700; }
.target-kind small { font-size: .72rem; }
.target-kind[aria-pressed="true"] { border-color: var(--accent); background: rgba(117, 199, 215, .12); color: var(--accent); }
.target-options {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(230px, 86%);
  gap: 9px;
  max-width: 100%;
  margin-top: 14px;
  padding: 2px 2px 12px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  overscroll-behavior-inline: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(117, 199, 215, .5) transparent;
}
.target-options::-webkit-scrollbar { height: 8px; }
.target-options::-webkit-scrollbar-thumb { border-radius: 999px; background: rgba(117, 199, 215, .5); }
.target-card {
  min-width: 0;
  min-height: 116px;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  color: var(--text);
  text-align: left;
  scroll-snap-align: start;
  cursor: pointer;
}
.target-card strong, .target-card span { display: block; }
.target-card > span { margin-top: 8px; color: var(--muted); font-size: .82rem; line-height: 1.5; }
.target-card.is-installed { border-color: rgba(79, 208, 139, .55); }
.target-card.is-installed[aria-pressed="true"] { border-color: var(--keep); background: var(--keep-bg); box-shadow: inset 0 0 0 1px var(--keep); }
.target-card.is-replacement[aria-pressed="true"] { border-color: var(--replace); background: var(--replace-bg); box-shadow: inset 0 0 0 1px var(--replace); }
.target-card-badge { width: fit-content; padding: 4px 7px; border: 1px solid currentColor; font-size: .68rem; font-weight: 800; letter-spacing: .02em; }
.target-card-badge.installed { color: var(--keep); }
.target-card-badge.replacement { color: var(--replace); }
.target-readout { margin-top: 14px; padding: 12px; border: 1px solid var(--line); background: #0f1416; }
.target-readout > span, .target-readout small { display: block; color: var(--faint); font-size: .72rem; line-height: 1.45; }
.target-readout strong { display: block; margin: 5px 0; line-height: 1.4; }
.same-part-notice { margin: 12px 0 0; padding: 11px 12px; border: 1px solid var(--keep); background: var(--keep-bg); color: #bdf5d3; font-size: .84rem; line-height: 1.6; }

.overall-badge {
  margin: 0;
  min-height: 34px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.35;
  text-align: center;
}
.overall-badge.keep { border-color: var(--keep); background: var(--keep-bg); color: var(--keep); }
.overall-badge.check { border-color: var(--check); background: var(--check-bg); color: var(--check); }
.overall-badge.replace { border-color: var(--replace); background: var(--replace-bg); color: var(--replace); }
.chain-panel {
  margin: 0 0 18px;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--line);
}
.chain-panel h2 { margin: 0; font-size: 1.22rem; line-height: 1.35; }
.result-empty-state { margin: 14px 0 0; padding: 14px 15px; border: 1px solid var(--accent); background: rgba(117, 199, 215, .09); color: var(--text); font-size: .9rem; line-height: 1.7; }
#resultEmptyState[hidden], #chainVisual[hidden], #chainNote[hidden], #resultOverview[hidden], #resultDetails[hidden] { display: none; }
.chain-svg-wrap { max-width: 720px; margin: 14px auto 0; padding: 8px; border: 1px solid var(--line); background: #090d0e; }
.chain-svg { display: block; width: 100%; height: auto; min-height: 410px; }
.chain-bg { fill: #0b0f10; stroke: #283437; }
.chain-link path { fill: none; stroke: #536164; stroke-width: 3; stroke-linecap: round; stroke-dasharray: 6 7; }
.chain-link.keep path { stroke: var(--keep); stroke-dasharray: none; }
.chain-link.check path { stroke: var(--check); }
.chain-link.replace path { stroke: var(--replace); stroke-width: 4; }
.chain-relation {
  fill: var(--muted);
  stroke: #090d0e;
  stroke-width: 4px;
  paint-order: stroke fill;
  font-size: 12px;
  font-weight: 900;
  text-anchor: middle;
  letter-spacing: .02em;
}
.chain-relation.keep { fill: var(--keep); }
.chain-relation.check { fill: var(--check); }
.chain-relation.replace { fill: var(--replace); }
.chain-part rect, .chain-target rect { fill: #151d1f; stroke: var(--line); stroke-width: 2; }
.chain-part text, .chain-target text { fill: var(--text); font-size: 11px; font-weight: 800; text-anchor: middle; }
.chain-part .svg-status, .chain-target .svg-status { fill: var(--muted); font-size: 10px; }
.chain-part.keep rect, .chain-target.keep rect { fill: var(--keep-bg); stroke: var(--keep); }
.chain-part.check rect, .chain-target.check rect { fill: var(--check-bg); stroke: var(--check); stroke-dasharray: 5 4; }
.chain-part.replace rect, .chain-target.replace rect { fill: var(--replace-bg); stroke: var(--replace); }
.chain-part.keep .svg-status, .chain-target.keep .svg-status { fill: var(--keep); }
.chain-part.check .svg-status, .chain-target.check .svg-status { fill: var(--check); }
.chain-part.replace .svg-status, .chain-target.replace .svg-status { fill: var(--replace); }
.legend text { fill: var(--muted); font-size: 10px; }
.legend-keep { fill: var(--keep); }
.legend-check { fill: var(--check); }
.legend-replace { fill: var(--replace); }
.svg-note { margin: 10px 0 0; color: var(--muted); font-size: .78rem; line-height: 1.55; }

.result-panel { margin-top: 0; }
.result-details-panel { margin-top: 16px; }
.result-head { align-items: flex-end; }
.result-summary {
  margin: 16px 0 0;
  padding: 15px 16px;
  border: 1px solid var(--accent);
  background: rgba(117, 199, 215, .09);
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.7;
}
.result-meters { display: grid; grid-template-columns: repeat(3, minmax(72px, 1fr)); gap: 7px; margin-top: 12px; }
.result-meter { padding: 7px 9px; border: 1px solid var(--line); background: var(--panel-deep); text-align: center; }
.result-meter strong, .result-meter span { display: block; }
.result-meter strong { font-size: 1.2rem; }
.result-meter span { color: var(--text); font-size: .78rem; }
.result-meter span small { display: block; margin-top: 2px; color: var(--muted); font-size: .64rem; }
.status-columns { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 16px; }
.status-column { min-width: 0; padding: 14px; border: 1px solid var(--line); background: var(--panel-deep); }
.status-column h3 { font-size: .98rem; line-height: 1.35; }
.status-column h3 span { display: block; margin-top: 3px; color: var(--muted); font-size: .76rem; font-weight: 500; }
.keep-column { border-top: 4px solid var(--keep); }
.replace-column { border-top: 4px solid var(--replace); }
.check-column { border-top: 4px solid var(--check); }
.status-column ul, .manual-checks ul, .minimum-plan ol { margin: 12px 0 0; padding: 0; list-style: none; }
.status-column ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.status-column li { padding: 12px; border: 1px solid var(--line); background: #0d1214; }
.status-column li + li { margin-top: 0; }
.result-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.result-card-head > strong { font-size: .98rem; line-height: 1.45; }
.result-status-name { color: var(--text); font-size: .78rem; font-weight: 800; line-height: 1.35; text-align: right; }
.result-status-name small { display: block; margin-top: 2px; color: var(--muted); font-size: .64rem; }
.result-details { margin: 12px 0 0; }
.result-detail { padding: 9px 0; border-top: 1px solid var(--line); }
.result-detail dt { color: var(--faint); font-size: .7rem; font-weight: 800; line-height: 1.4; }
.result-detail dd { margin: 4px 0 0; color: var(--muted); font-size: .82rem; line-height: 1.6; }
.result-action dd { color: var(--text); font-weight: 700; }
.check-source dd span { display: block; }
.check-source dd span + span { margin-top: 3px; }
.check-source dd span::before { content: "・"; color: var(--check); }
.result-card.replace { border-left: 3px solid var(--replace); }
.result-card.check { border-left: 3px solid var(--check); }
.result-card.keep { border-left: 3px solid var(--keep); }
.result-card-compact { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: start; gap: 8px 12px; padding: 10px 12px; }
.result-card-compact > strong { min-width: 0; font-size: .92rem; line-height: 1.4; }
.result-card-compact .result-status-name { white-space: nowrap; }
.result-compact-spec { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.45; }
.result-compact-spec span { margin-right: 6px; color: var(--faint); font-size: .68rem; font-weight: 800; }
.empty-item { color: var(--faint); font-style: italic; }
.plan-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 12px; }
.minimum-plan, .manual-checks { min-width: 0; padding: 15px; border: 1px solid var(--line); background: #0f1416; }
.minimum-plan h3, .manual-checks h3 { font-size: 1rem; }
.minimum-plan li, .manual-checks li { position: relative; padding: 8px 0 8px 28px; color: var(--muted); line-height: 1.55; }
.minimum-plan li::before { content: counter(list-item, decimal-leading-zero); position: absolute; left: 0; color: var(--replace); font-size: .72rem; font-weight: 800; }
.manual-checks li::before { content: "!"; position: absolute; left: 4px; color: var(--check); font-weight: 900; }

.foot { margin-top: 16px; padding: 18px; color: var(--muted); font-size: .88rem; line-height: 1.7; }
.foot p { margin: 5px 0; }

@media (max-width: 1160px) {
  .simulator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .result-panel { grid-column: 1 / -1; }
}

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }
  .hero-device { max-width: 360px; min-height: 130px; justify-self: center; }
  .simulator-grid, .status-columns, .status-column ul, .plan-grid { grid-template-columns: 1fr; }
  .result-panel { grid-column: auto; }
  .result-head { align-items: flex-start; flex-direction: column; }
  .result-meters { width: 100%; }
}

@media (max-width: 520px) {
  .shell { width: min(100% - 20px, 1440px); padding-top: 12px; }
  .hero, .panel, .foot { padding: 14px; }
  .notice { padding: 12px 13px; }
  h1 { line-height: 1.15; letter-spacing: 0; }
  h1 > span { font-size: 2rem; letter-spacing: 0; }
  h1 > small { font-size: 1.05rem; }
  .lead { font-size: .98rem; }
  .hero-device { min-height: 112px; }
  .panel-head { flex-direction: column; }
  .reset-button, .overall-badge { width: 100%; }
  .current-fields label { grid-template-columns: 1fr; gap: 5px; }
  .current-fields label > span { font-size: .76rem; }
  .target-options { grid-auto-columns: minmax(78vw, 84vw); }
  .chain-svg { min-height: 360px; }
}