:root {
  color-scheme: light dark;

  --bg-app: #f4f4f5;
  --bg-card: #ffffff;
  --bg-subtle: #fafafa;
  --bg-muted: #f4f4f5;
  --bg-input: #ffffff;

  --border-color: #d4d4d8;
  --border-subtle: #e4e4e7;
  --border-strong: #a1a1aa;

  --text-main: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;

  --action-bg: #18181b;
  --action-bg-hover: #27272a;
  --action-text: #ffffff;

  --secondary-bg: #ffffff;
  --secondary-bg-hover: #f4f4f5;
  --secondary-text: #18181b;

  --focus-ring: #18181b;

  --danger-bg: #fef2f2;
  --danger-border: #f87171;
  --danger-text: #b91c1c;
  --danger-bar: #dc2626;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-app: #09090b;
    --bg-card: #121215;
    --bg-subtle: #16161a;
    --bg-muted: #1c1c21;
    --bg-input: #09090b;

    --border-color: #27272a;
    --border-subtle: #1f1f23;
    --border-strong: #3f3f46;

    --text-main: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --action-bg: #fafafa;
    --action-bg-hover: #e4e4e7;
    --action-text: #09090b;

    --secondary-bg: #18181b;
    --secondary-bg-hover: #27272a;
    --secondary-text: #fafafa;

    --focus-ring: #fafafa;

    --danger-bg: rgba(220, 38, 38, 0.1);
    --danger-border: rgba(248, 113, 113, 0.45);
    --danger-text: #fca5a5;
    --danger-bar: #ef4444;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0;
}

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mono-num {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.app-layout {
  max-width: 540px;
  width: 100%;
  margin: 0 auto;
  padding: 64px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}

.brand-icon {
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.btn-link {
  background: none;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  padding: 4px 8px;
  margin-right: -8px;
}

.btn-link:hover {
  color: var(--text-main);
  background-color: var(--bg-muted);
  border-color: var(--border-color);
}

.btn-link:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.alert-box {
  background-color: var(--danger-bg);
  border: 1px solid var(--danger-border);
  border-left: 3px solid var(--danger-bar);
  padding: 12px 14px;
  color: var(--danger-text);
  font-size: 13px;
  line-height: 1.45;
}

.alert-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.alert-icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.alert-message {
  flex: 1;
  word-break: break-word;
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.lookup-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.lookup-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.input-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.text-input {
  width: 100%;
  height: 40px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 0 12px;
  -webkit-appearance: none;
  appearance: none;
}

.text-input::placeholder {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.text-input:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: -1px;
  border-color: var(--focus-ring);
}

.lookup-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  height: 38px;
  padding: 0 16px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  white-space: nowrap;
  -webkit-appearance: none;
  appearance: none;
}

.btn:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--action-bg-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--secondary-bg-hover);
}

.btn-download {
  width: 100%;
  height: 44px;
  font-size: 14px;
  font-weight: 600;
  background-color: var(--action-bg);
  color: var(--action-text);
}

.btn-download:hover:not(:disabled) {
  background-color: var(--action-bg-hover);
}

.btn-download.is-cancelling {
  background-color: var(--secondary-bg);
  color: var(--danger-text);
  border-color: var(--danger-border);
}

.btn-download.is-cancelling:hover:not(:disabled) {
  background-color: var(--danger-bg);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-link:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.noscript-message {
  max-width: 540px;
  margin: 24px auto;
  padding: 0 20px;
}

.file-card {
  display: flex;
  flex-direction: column;
}

.file-hero {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.file-info-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.file-icon {
  width: 44px;
  height: 44px;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  flex-shrink: 0;
  margin-top: 2px;
}

.file-text-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filename-container {
  display: flex;
  align-items: center;
}

.filename-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  border: 1px solid transparent;
  padding: 3px 6px;
  margin-left: -6px;
  text-overflow: ellipsis;
  -webkit-appearance: none;
  appearance: none;
}

.filename-input:hover:not([readonly]) {
  background-color: var(--bg-muted);
  border-color: var(--border-color);
}

.filename-input[readonly] {
  cursor: default;
}

.filename-input:focus:not([readonly]) {
  background-color: var(--bg-input);
  border-color: var(--focus-ring);
  outline: 2px solid var(--focus-ring);
  outline-offset: -1px;
}

.file-sub-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-secondary);
}

.meta-size {
  font-weight: 600;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.separator {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.download-container {
  width: 100%;
}

.progress-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 2px;
}

.progress-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: var(--text-secondary);
  gap: 12px;
  align-items: flex-start;
}

#progress-status {
  min-width: 0;
  overflow-wrap: anywhere;
}

#progress-percent {
  flex-shrink: 0;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--action-bg);
}

.tech-accordion {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
}

.tech-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 24px;
  cursor: pointer;
  user-select: none;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-secondary);
  list-style: none;
}

.tech-summary::-webkit-details-marker {
  display: none;
}

.tech-summary:hover {
  color: var(--text-main);
}

.tech-summary:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: -2px;
}

.chevron {
  color: var(--text-muted);
  flex-shrink: 0;
}

.tech-accordion[open] .chevron {
  transform: rotate(180deg);
}

.tech-details-body {
  padding: 4px 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  border-top: 1px solid var(--border-subtle);
}

.tech-kv-list {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 8px 16px;
  font-size: 12.5px;
  padding-top: 12px;
}

.tech-kv-row {
  display: contents;
}

.tech-kv-row dt {
  color: var(--text-secondary);
  font-weight: 500;
}

.tech-kv-row dd {
  color: var(--text-main);
  min-width: 0;
  display: flex;
  align-items: center;
}

.code-truncate {
  font-family: var(--font-mono);
  font-size: 11.5px;
  background-color: var(--bg-card);
  padding: 2px 6px;
  border: 1px solid var(--border-color);
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  user-select: all;
}

.swarm-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.swarm-table-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.swarm-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1px 7px;
}

.table-wrapper {
  max-height: 210px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
}

.table-wrapper:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: -1px;
}

.tech-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  font-size: 11.5px;
}

.tech-table th,
.tech-table td {
  padding: 7px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table th {
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 500;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-color);
  z-index: 1;
}

.tech-table .col-index {
  width: 44px;
  text-align: right;
  padding-right: 12px;
}

.tech-table .col-key {
  width: calc((100% - 44px) / 2);
}

.tech-table .col-root {
  width: calc((100% - 44px) / 2);
}

.tech-table td.cell-index {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  padding-right: 12px;
}

.tech-table td code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-main);
  user-select: all;
}

@media (max-width: 480px) {
  .app-layout {
    padding: 32px 16px;
  }

  .lookup-card,
  .file-hero {
    padding: 18px;
  }

  .tech-summary,
  .tech-details-body {
    padding-left: 18px;
    padding-right: 18px;
  }

  .tech-kv-list {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .tech-kv-row dt {
    margin-top: 6px;
  }
}