:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-accent: #16a34a;
  --color-accent-text: #ffffff;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-error-text: #b91c1c;
  --color-tag-company: #64748b;
  --color-tag-project: #2563eb;
  --color-tag-funding: #16a34a;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

.hero {
  text-align: center;
  padding: var(--space-lg);
}

.hero h1 {
  font-size: 2.25rem;
  margin: 0 0 var(--space-sm);
}

.subtitle {
  color: var(--color-muted);
  margin: 0;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.panel-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  align-items: start;
}

.panel-row > .panel {
  min-width: 0;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.panel h2 {
  margin: 0 0 var(--space-md);
  font-size: 1.1rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

button {
  font: inherit;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-accent);
  background: var(--color-accent);
  color: var(--color-accent-text);
  cursor: pointer;
}

button:disabled {
  background: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-muted);
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

input[type="text"],
input[type="url"] {
  font: inherit;
  padding: 0.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.type-toggles,
.lifecycle-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.lifecycle-toggles {
  margin-bottom: var(--space-md);
}

.type-toggle.active,
.lifecycle-toggle.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-text);
}

.status-line {
  min-height: 1.2em;
  color: var(--color-muted);
  margin: 0 0 var(--space-sm);
}

.state {
  padding: var(--space-sm);
  border-radius: var(--radius);
}

.state--error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
}

.state--empty,
.state--partial,
.state--loading {
  color: var(--color-muted);
}

.signal-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.shelf {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.signal-card,
.shelf-card,
.brief-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
}

.signal-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 240px;
}

.signal-card .tag {
  align-self: flex-start;
}

.signal-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.signal-date {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.signal-summary {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-sm);
}

.tag--company { background: var(--color-tag-company); }
.tag--project { background: var(--color-tag-project); }
.tag--funding { background: var(--color-tag-funding); }

.signal-title {
  margin: var(--space-sm) 0;
}

.signal-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
}

.link-original {
  display: inline-block;
  font: inherit;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
}

.link-original:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.shelf-card {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  cursor: pointer;
}

.shelf-notice,
.compare-hint {
  color: var(--color-muted);
  min-height: 1.2em;
}

.shelf-controls {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.brief-bullets,
.brief-fields {
  padding-left: 1.2rem;
}

.field-value--muted {
  color: var(--color-muted);
  font-style: italic;
}

.comparison-table table {
  width: 100%;
  border-collapse: collapse;
}

.comparison-table {
  overflow-x: auto;
}

.comparison-table th,
.comparison-table td {
  border: 1px solid var(--color-border);
  padding: var(--space-sm);
  text-align: left;
  vertical-align: top;
}

.cell--not-disclosed {
  color: var(--color-muted);
  font-style: italic;
}

.cell--not-applicable {
  color: var(--color-muted);
  background: var(--color-bg);
  text-align: center;
}

.web-explorer-form {
  display: flex;
  gap: var(--space-sm);
}

.web-explorer-form input {
  flex: 1;
}

@media (max-width: 900px) {
  .panel-row {
    grid-template-columns: 1fr;
  }

  .signal-results {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  main {
    padding: 0 var(--space-md) var(--space-md);
  }

  .controls,
  .web-explorer-form {
    flex-direction: column;
    align-items: stretch;
  }

  .controls > *,
  .web-explorer-form > * {
    width: 100%;
    min-width: 0;
  }

  .type-toggles {
    flex-wrap: wrap;
  }

  .type-toggles button {
    flex: 1 1 auto;
    min-width: 0;
  }

  .signal-results {
    grid-template-columns: 1fr;
  }

  .signal-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}