/* style.css — Dark theme matching NullKit brand */

:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #12121f;
  --bg-tertiary: #1a1a2e;
  --border: #1a1a2e;
  --text: #ffffff;
  --text-dim: #b2bec3;
  --accent-purple: #6c5ce7;
  --accent-blue: #0984e3;
  --color-added: #00b894;
  --color-removed: #d63031;
  --color-changed: #fdcb6e;
  --color-same: #636e72;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-primary);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  text-align: center;
  margin-bottom: 3rem;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-dim);
  font-size: 1.1rem;
}

/* Landing page */
#landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.drop-zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  width: 100%;
  max-width: 1000px;
}

.drop-zone {
  background: var(--bg-secondary);
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-zone:hover {
  border-color: var(--accent-purple);
  background: var(--bg-tertiary);
}

.drop-zone.drag-over {
  border-color: var(--accent-blue);
  background: var(--bg-tertiary);
  transform: scale(1.02);
}

.drop-text {
  font-size: 1.2rem;
  color: var(--text-dim);
}

.file-info {
  text-align: center;
}

.file-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  word-break: break-word;
}

.file-meta {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.loading, .error {
  color: var(--text-dim);
  font-size: 1.1rem;
}

.error {
  color: var(--color-removed);
}

.file-input {
  display: none;
}

.btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: white;
  border: none;
  padding: 1rem 3rem;
  font-size: 1.1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
  font-weight: 600;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
}

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

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

/* Report view */
#report {
  display: none;
}

.report-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.tabs {
  display: flex;
  gap: 1rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 2rem;
}

.tab {
  padding: 1rem 2rem;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.3s ease;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
}

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

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* Summary tab */
.comparison-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.comparison-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.comparison-card h3 {
  color: var(--accent-purple);
  margin-bottom: 1rem;
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

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

.info-row span:first-child {
  color: var(--text-dim);
}

.stats-summary {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
}

.stats-summary h3 {
  color: var(--accent-blue);
  margin-bottom: 1rem;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  font-weight: 600;
}

.stat-label.added { color: var(--color-added); }
.stat-label.removed { color: var(--color-removed); }
.stat-label.changed { color: var(--color-changed); }
.stat-label.same { color: var(--color-same); }

/* Filters */
.filters {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.filter-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.filter-group label {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.filter-group input[type="radio"],
.filter-group input[type="checkbox"] {
  margin-right: 0.25rem;
}

.filter-group select,
.filter-group input[type="text"] {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

/* Tables */
.diff-table {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  border-collapse: collapse;
  overflow: hidden;
}

.diff-table thead {
  background: var(--bg-tertiary);
}

.diff-table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.diff-table td {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.diff-table tbody tr.status-added {
  background: rgba(0, 184, 148, 0.1);
}

.diff-table tbody tr.status-removed {
  background: rgba(214, 48, 49, 0.1);
}

.diff-table tbody tr.status-changed,
.diff-table tbody tr.status-type_changed,
.diff-table tbody tr.status-shape_changed {
  background: rgba(253, 203, 110, 0.1);
}

.tensor-name {
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
}

.status-badge.added { background: var(--color-added); color: white; }
.status-badge.removed { background: var(--color-removed); color: white; }
.status-badge.changed,
.status-badge.type_changed,
.status-badge.shape_changed { background: var(--color-changed); color: #0a0a1a; }
.status-badge.same { background: var(--color-same); color: white; }

.positive { color: var(--color-added); }
.negative { color: var(--color-removed); }

/* Charts */
.chart-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
}

.chart {
  width: 100%;
  height: 400px;
}

/* Responsive */
@media (max-width: 768px) {
  .drop-zones,
  .comparison-cards {
    grid-template-columns: 1fr;
  }
  
  .tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
  }
  
  .diff-table {
    font-size: 0.85rem;
  }
  
  .diff-table th,
  .diff-table td {
    padding: 0.5rem;
  }
}

/* Static pages */
.static-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.static-page h2 {
  color: var(--accent-purple);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.static-page p {
  margin-bottom: 1rem;
  color: var(--text-dim);
}

.static-page ul {
  margin-left: 2rem;
  margin-bottom: 1rem;
  color: var(--text-dim);
}

.static-page a {
  color: var(--accent-blue);
  text-decoration: none;
}

.static-page a:hover {
  text-decoration: underline;
}

/* Sample button */
.sample-section {
  margin-top: 24px;
  text-align: center;
}
.sample-label {
  color: #666;
  font-size: 0.85rem;
  margin-bottom: 8px;
}
.btn-sample {
  background: #1a1a2e;
  border: 1px solid #2a2a4e;
  color: #c0c0d0;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}
.btn-sample:hover {
  background: #22223a;
  border-color: #6c5ce7;
}
.sample-meta {
  display: block;
  font-size: 0.75rem;
  color: #666;
  margin-top: 4px;
}