:root {
  --bg: #0b0b0b;
  --surface: #111111;
  --text: #e8e6e1;
  --muted: #9c9a94;
  --line: #2c2c2c;
  --line-strong: #4a4a4a;
  --pass: #5eea8a;
  --fail: #ff6b6b;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --font: "IBM Plex Mono", ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-md: 0.9375rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: 2.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
}

a {
  color: inherit;
}

:focus-visible {
  outline: 1px solid var(--text);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: var(--space-2);
  top: -40px;
  padding: var(--space-1) var(--space-2);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  color: var(--text);
  text-decoration: none;
  z-index: 20;
}

.skip:focus {
  top: var(--space-2);
}

.app {
  max-width: 1760px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-3) var(--space-2) var(--space-4);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.masthead h1 {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.2;
}

.masthead-meta {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
  max-width: 52ch;
}

.layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  flex: 1 1 auto;
  align-items: stretch;
}

.input,
.output {
  width: 100%;
  min-width: 0;
  height: auto;
  align-self: stretch;
}

.input {
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
}

.section-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.device-type {
  margin: 0 0 var(--space-2);
  padding: var(--space-1) var(--space-2);
}

.mode-toggle {
  display: inline-flex;
  vertical-align: top;
  border: 1px solid var(--line);
}

button.mode-option {
  flex: none;
  min-height: 0;
  height: 28px;
  margin: 0;
  padding: 0 12px;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 28px;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-right: 1px solid var(--line);
  border-radius: 0;
  box-shadow: none;
}

button.mode-option:last-child {
  border-right: 0;
}

button.mode-option.is-on,
button.mode-option.is-on:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--line);
}

button.mode-option:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--line);
}

body.is-laptop .desktop-only {
  display: none;
}

.laptop-only {
  display: none;
}

body.is-laptop .laptop-only {
  display: block;
}

body.is-laptop .form-grid > .laptop-only.span-2 {
  display: block;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

@media (min-width: 640px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 1100px) {
  .form-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

fieldset {
  margin: 0;
  padding: var(--space-2);
  border: 1px solid var(--line);
  background: var(--surface);
  min-width: 0;
}

legend {
  padding: 0 var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.field {
  display: grid;
  grid-template-columns: 11ch minmax(0, 1fr);
  gap: var(--space-1);
  align-items: center;
  margin: 0 0 var(--space-1);
}

.field:last-child {
  margin-bottom: 0;
}

.field-hint {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.4;
}

label {
  font-size: var(--text-xs);
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

input,
select,
button {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0;
  box-shadow: none;
}

input,
select {
  width: 100%;
  min-height: 44px;
  padding: 0 var(--space-1);
  font-size: var(--text-sm);
}

input::placeholder {
  color: var(--muted);
  opacity: 1;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath fill='%23e8e6e1' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-position: right 12px center;
  background-repeat: no-repeat;
  padding-right: 28px;
}

input:hover,
select:hover {
  border-color: var(--line-strong);
}

input:focus,
select:focus {
  outline: 1px solid var(--text);
  outline-offset: 0;
  border-color: var(--text);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

button {
  min-height: 44px;
  padding: 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

button:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

button:active {
  opacity: 0.85;
}

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

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.btn-primary:hover {
  background: var(--bg);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
}

.scan-status-line {
  margin: 0;
  flex: 1 1 100%;
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
  min-height: 1.5em;
}

.output {
  min-height: 0;
  background: transparent;
  border: 0;
}

.output-inner {
  padding: 0;
}

.results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: stretch;
  width: 100%;
}

.result-stack {
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 0;
}

.results-grid > .col-side {
  margin-top: -1px;
}

@media (min-width: 720px) {
  .results-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .card-scan {
    grid-column: 1 / -1;
  }

  .results-grid.has-scan > .result-stack {
    margin-top: -1px;
  }

  .results-grid > .col-side {
    margin-top: 0;
    margin-left: -1px;
  }

  .results-grid.has-scan > .col-side {
    margin-top: -1px;
  }

  .results-grid > .result-card:nth-child(2n) {
    margin-left: -1px;
    margin-top: 0;
  }

  .results-grid > .result-card:nth-child(n + 3) {
    margin-top: -1px;
  }
}

.result-card {
  border: 1px solid var(--line-strong);
  background: var(--surface);
  padding: var(--space-3);
  min-width: 0;
  height: auto;
  align-self: stretch;
}

.result-stack > .result-card + .result-card,
.results-grid > .result-card + .result-card {
  margin-top: -1px;
}

.result-card .section-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.score {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-2);
  border-bottom: 1px solid var(--line);
}

.score-value {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.score-slash {
  color: var(--muted);
  font-weight: 400;
  margin: 0 2px;
}

.score-label {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.score.is-pass .score-value,
.score.is-pass .score-label {
  color: var(--pass);
}

.score.is-fail .score-value,
.score.is-fail .score-label {
  color: var(--fail);
}

.score.is-idle .score-value,
.score.is-idle .score-label {
  color: var(--muted);
}

.rules {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rule {
  padding: var(--space-1) 0;
  border-bottom: 1px solid var(--line);
}

.rule:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.rule-head {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-1);
  align-items: baseline;
  min-width: 0;
}

.rule-status {
  flex: 0 0 12ch;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.rule.is-pass .rule-status {
  color: var(--pass);
}

.rule.is-fail .rule-status {
  color: var(--fail);
}

.rule.is-skip .rule-status,
.rule.is-skip .rule-name {
  color: var(--muted);
}

.rule-id {
  flex: 0 0 2.5ch;
  font-size: var(--text-xs);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.rule-name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rule-reason,
.rule-fix {
  margin: 4px 0 0;
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--muted);
}

.rule-fix {
  color: var(--text);
}

.fixes {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--line);
}

.fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.fix-item {
  display: grid;
  grid-template-columns: 2.5ch minmax(0, 1fr);
  gap: var(--space-1);
  align-items: baseline;
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}

.fix-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.fix-id {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--fail);
  font-variant-numeric: tabular-nums;
}

.fix-text {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--text);
}

.empty {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--muted);
}

.gpu-diagram {
  margin: var(--space-1) 0 0;
  padding: var(--space-1) 0 0;
}

.gpu-diagram-caption {
  margin: 0 0 6px;
  font-size: var(--text-xs);
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.gpu-diagram svg {
  display: block;
  width: auto;
  max-width: 100%;
  height: 4.75rem;
  overflow: visible;
}

.diagram-case,
.diagram-gpu,
.diagram-overhang {
  vector-effect: non-scaling-stroke;
}

.diagram-case {
  fill: none;
  stroke: var(--text);
  stroke-width: 1;
}

.diagram-gpu {
  fill: none;
  stroke-width: 1;
}

.diagram-gpu.is-pass {
  stroke: var(--pass);
  fill: var(--pass);
}

.diagram-gpu.is-fail {
  stroke: var(--fail);
  fill: var(--fail);
}

.diagram-bracket {
  stroke: none;
}

.diagram-bracket.is-pass {
  fill: var(--pass);
}

.diagram-bracket.is-fail {
  fill: var(--fail);
}

.diagram-label,
.diagram-overhang-label {
  font-family: var(--font);
}

.diagram-label {
  fill: var(--muted);
}

.diagram-label.is-pass {
  fill: var(--pass);
}

.diagram-label.is-fail {
  fill: var(--fail);
}

.diagram-overhang {
  stroke: var(--fail);
  stroke-width: 1;
}

.diagram-overhang-label {
  fill: var(--fail);
}

.result-panel {
  margin: 0 0 var(--space-3);
  padding: 0 0 var(--space-3);
  border-bottom: 1px solid var(--line-strong);
}

.result-panel:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.scan-report {
  margin: 0 0 var(--space-3);
}

.scan-note {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.55;
  max-width: 62ch;
}

.scan-list {
  list-style: none;
  margin: 0 0 var(--space-2);
  padding: 0;
}

.scan-item {
  display: grid;
  grid-template-columns: 12ch minmax(0, 1fr);
  gap: var(--space-1);
  align-items: start;
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.scan-body {
  min-width: 0;
}

.scan-item:last-child {
  border-bottom: 0;
}

.scan-status {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.scan-item.is-detected .scan-status {
  color: var(--pass);
}

.scan-item.is-approximate .scan-status,
.scan-item.is-unavailable .scan-status,
.scan-item.is-suggested .scan-status {
  color: var(--muted);
}

.scan-item-label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.scan-item-value {
  font-size: var(--text-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scan-item-note {
  margin: 4px 0 0;
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.scoring {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--line);
}

.scoring-note {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.55;
  max-width: 62ch;
}

.score-card {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--line);
}

.score-card:last-of-type {
  border-bottom: 0;
}

.score-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-1);
}

.score-card-name {
  margin: 0;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.score-card-total {
  font-size: var(--text-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.score-parts {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.score-part {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px var(--space-1);
  margin: 0;
  padding: 2px 0;
}

.score-part-meta {
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}

.score-part-more {
  margin: 0;
}

.score-part-more summary {
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  list-style: none;
}

.score-part-more summary::-webkit-details-marker {
  display: none;
}

.score-part-rule {
  margin: 4px 0 0;
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
}

.upgrades {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.upgrades .score-card-name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text);
}

.upgrade-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.upgrade-item {
  display: grid;
  grid-template-columns: 2.5ch minmax(0, 1fr);
  gap: var(--space-1);
  align-items: start;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.upgrade-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.upgrade-rank {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.upgrade-title {
  font-size: var(--text-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.upgrade-detail {
  margin: 2px 0 0;
  font-size: var(--text-xs);
  color: var(--muted);
  line-height: 1.5;
}

.bottleneck-verdict {
  margin: 6px 0;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.bottleneck-verdict.is-pass {
  color: var(--pass);
}

.bottleneck-verdict.is-fail {
  color: var(--fail);
}

.bottleneck-summary {
  margin: 0 0 var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.bottleneck-res {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-xs);
  color: var(--muted);
}

.bottleneck-res li {
  padding: 2px 0;
}

.game-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-xs);
  table-layout: auto;
}

.game-table th,
.game-table td {
  text-align: left;
  padding: 6px 12px 6px 0;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  white-space: nowrap;
}

.game-table td.tier {
  min-width: 16ch;
}

.game-table thead th {
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.game-table tbody th {
  font-weight: 500;
  color: var(--text);
}

.tier.is-pass {
  color: var(--pass);
}

.tier.is-fail {
  color: var(--fail);
}

@media (max-width: 639px) {
  .field {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  label {
    padding-top: 4px;
  }

  .scan-item {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .rule-reason,
  .rule-fix {
    padding-left: 0;
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}