:root {
  --bg: #ffffff;
  --bg-secondary: #f5f5f5;
  --fg: #1a1a1a;
  --fg-secondary: #666666;
  --border: #dddddd;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --radius: 6px;
  --font-mono: "SF Mono", "Cascadia Code", "Fira Code", Consolas, monospace;
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --fg: #e5e5e5;
    --fg-secondary: #999999;
    --border: #444444;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
  }
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

header {
  margin-bottom: 1.5rem;
  position: relative;
}

.github-corner svg {
  fill: var(--accent);
  color: var(--bg);
  position: fixed;
  top: 0;
  right: 0;
  border: 0;
  z-index: 10;
}

.github-corner:hover .octo-arm {
  animation: octocat-wave 560ms ease-in-out;
}

@keyframes octocat-wave {
  0%,
  100% {
    transform: rotate(0);
  }
  20%,
  60% {
    transform: rotate(-25deg);
  }
  40%,
  80% {
    transform: rotate(10deg);
  }
}

header h1 {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
}

header p {
  color: var(--fg-secondary);
  font-size: 0.875rem;
}

/* --- Page-level Tabs (Scan / Inspect) --- */

.page-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--border);
}

.page-tab {
  padding: 0.5rem 1.25rem;
  border: none;
  background: none;
  color: var(--fg-secondary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition:
    color 0.15s,
    border-color 0.15s;
}

.page-tab:hover {
  color: var(--fg);
}

.page-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.page-panel[hidden] {
  display: none;
}

/* --- Inspect Cards --- */

.inspect-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

.inspect-card-header {
  padding: 0.625rem 0.75rem;
  background: var(--bg-secondary);
  font-weight: 600;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.inspect-card-body {
  padding: 0;
}

.inspect-card-body .metadata-grid {
  border-top: none;
  margin-top: 0;
}

#inspect-results {
  margin-top: 1.5rem;
}

/* --- Category Tabs --- */

.category-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

.cat-tab {
  padding: 0.375rem 0.875rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg-secondary);
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 999px;
  transition:
    color 0.15s,
    background-color 0.15s,
    border-color 0.15s;
}

.cat-tab:hover {
  color: var(--fg);
  border-color: var(--fg-secondary);
}

.cat-tab.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* --- Validation detail rows --- */

.verify-banner-inline {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 0.5rem;
}

.verify-banner-inline.valid {
  background: color-mix(in srgb, var(--success) 12%, transparent);
  color: var(--success);
}

.verify-banner-inline.invalid {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
}

.check-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  border-bottom: 1px solid var(--border);
}

.check-row:last-child {
  border-bottom: none;
}

.check-row > div {
  display: flex;
  align-items: baseline;
}

.check-label {
  font-weight: 500;
  min-width: 7.5rem;
  flex-shrink: 0;
}

.check-detail {
  color: var(--fg-secondary);
  font-size: 0.75rem;
}

.check-status {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-shrink: 0;
}

.check-status svg {
  width: 16px;
  height: 16px;
}

.check-pass {
  color: var(--success);
}

.check-fail {
  color: var(--danger);
}

.check-warn {
  color: var(--warning);
}

/* --- Cert detail row (click-to-expand) --- */

.cert-detail-row td {
  padding: 0 !important;
  background: var(--bg-secondary);
}

.cert-detail-row:hover td {
  background: var(--bg-secondary) !important;
}

.cert-detail-inner {
  padding: 0.5rem 0.75rem 0.75rem;
}

/* --- Metadata grid inside detail row --- */

.metadata-grid {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.25rem 0.75rem;
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  border-top: 1px solid var(--border);
}

.metadata-label {
  color: var(--fg-secondary);
  font-weight: 500;
}

.metadata-value {
  word-break: break-all;
}

.metadata-value.mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* --- Clickable table rows --- */

#results-table tbody tr:not(.cert-detail-row),
#keys-table tbody tr:not(.key-detail-row) {
  cursor: pointer;
}

#results-table tbody tr:not(.cert-detail-row):hover td,
#keys-table tbody tr:not(.key-detail-row):hover td {
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

#results-table tbody tr.selected td,
#keys-table tbody tr.selected td {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* --- Key detail row (click-to-expand) --- */

.key-detail-row td {
  padding: 0 !important;
  background: var(--bg-secondary);
}

.key-detail-row:hover td {
  background: var(--bg-secondary) !important;
}

.key-detail-inner {
  padding: 0.5rem 0.75rem 0.75rem;
}

.key-match-header {
  font-weight: 600;
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
  color: var(--fg-secondary);
}

.key-match-cert {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.375rem;
}

.key-match-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.key-match-cn {
  font-weight: 500;
  font-size: 0.8125rem;
}

.key-match-meta {
  color: var(--fg-secondary);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

.btn-go-to-cert {
  margin-top: 0.375rem;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  background: none;
  color: var(--accent);
  font-size: 0.75rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition:
    background-color 0.15s,
    color 0.15s;
}

.btn-go-to-cert:hover {
  background: var(--accent);
  color: white;
}

.explainer {
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--fg-secondary);
  line-height: 1.7;
}

.explainer details {
  margin-top: 0.5rem;
}

.explainer summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.8125rem;
}

.explainer summary:hover {
  text-decoration: underline;
}

.explainer ul {
  margin-top: 0.5rem;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  font-size: 0.8125rem;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition:
    border-color 0.2s,
    background-color 0.2s;
}

.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}

.drop-zone.dragging {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-style: solid;
}

.drop-zone-content svg {
  color: var(--fg-secondary);
  margin-bottom: 0.75rem;
}

.drop-zone-content p {
  margin: 0.25rem 0;
}

.hint {
  color: var(--fg-secondary);
  font-size: 0.8125rem;
}

.options-section {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.option-row label {
  font-size: 0.875rem;
  white-space: nowrap;
  min-width: 200px;
}

.option-row input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  font-size: 0.875rem;
  font-family: var(--font-mono);
}

.option-row input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.status-bar {
  margin-top: 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--fg-secondary);
}

.status-bar.processing {
  color: var(--accent);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.375rem;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.2s ease;
  width: 0%;
}

.progress-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--fg-secondary);
  white-space: nowrap;
}

#results-section {
  margin-top: 1.5rem;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.results-header h2 {
  font-size: 1.125rem;
}

.results-actions {
  display: flex;
  gap: 0.5rem;
}

.btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  cursor: pointer;
  transition:
    background-color 0.15s,
    border-color 0.15s;
  font-family: var(--font-sans);
}

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

.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg);
  color: var(--fg);
}

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

.summary {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.summary-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.summary-count {
  font-weight: 600;
  font-family: var(--font-mono);
}

.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.filter-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--fg-secondary);
  cursor: pointer;
  user-select: none;
}

.filter-label input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
}

.summary-hidden {
  color: var(--fg-secondary);
  font-weight: 400;
  font-size: 0.8125rem;
}

.table-container {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

th,
td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  color: var(--fg-secondary);
}

th[data-sort] {
  cursor: pointer;
  user-select: none;
}

th[data-sort]:hover {
  color: var(--accent);
}

th[data-sort].sort-asc::after,
th[data-sort].sort-desc::after {
  margin-left: 0.25rem;
  font-size: 0.625rem;
}

th[data-sort].sort-asc::after {
  content: "\25B2";
}

th[data-sort].sort-desc::after {
  content: "\25BC";
}

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

tr:hover td {
  background: color-mix(in srgb, var(--accent) 3%, transparent);
}

.col-select {
  width: 2rem;
  text-align: center;
}

.col-select input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
}

.ski {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.serial {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-leaf {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent);
}
.badge-intermediate {
  background: color-mix(in srgb, var(--warning) 15%, transparent);
  color: var(--warning);
}
.badge-root {
  background: color-mix(in srgb, var(--fg-secondary) 15%, transparent);
  color: var(--fg-secondary);
}
.badge-match {
  background: color-mix(in srgb, var(--success) 15%, transparent);
  color: var(--success);
}
.badge-no-match {
  background: color-mix(in srgb, var(--fg-secondary) 10%, transparent);
  color: var(--fg-secondary);
}
.badge-expired {
  background: color-mix(in srgb, var(--danger) 15%, transparent);
  color: var(--danger);
}
.badge-aia {
  background: color-mix(in srgb, #9b59b6 18%, transparent);
  color: #b07cc6;
  cursor: help;
}

#keys-section {
  margin-top: 0;
}

#keys-section h3,
#warnings-section h3 {
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
}

#warnings-section {
  margin-top: 1.5rem;
}

#warnings-list {
  list-style: none;
  padding: 0;
}

#warnings-list li {
  padding: 0.375rem 0.75rem;
  margin-bottom: 0.25rem;
  background: color-mix(in srgb, var(--warning) 10%, transparent);
  border-left: 3px solid var(--warning);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.8125rem;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--fg-secondary);
  font-size: 0.75rem;
}

footer a {
  color: var(--fg-secondary);
  text-decoration: underline;
}

footer a:hover {
  color: var(--accent);
}

@media (max-width: 640px) {
  body {
    padding: 1rem;
  }

  .option-row {
    flex-direction: column;
    align-items: stretch;
  }

  .option-row label {
    min-width: unset;
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .summary {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .category-tabs {
    flex-wrap: wrap;
  }
}