:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #059669;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-critical: #7c3aed;
  --color-border: #e5e7eb;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 960px;
}

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

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}
.header__title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}
.header__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* Mode tabs */
.mode-tab {
  flex: 1;
  padding: 0.5rem 1rem;
  border: none;
  background: none;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
  font-family: var(--font);
}
.mode-tab:hover {
  color: var(--color-text);
}
.mode-tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Layout */
#root {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem;
}

/* Card */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

/* Form */
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
  color: var(--color-text);
}
.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group input[type="number"] {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: var(--font);
  transition: border-color 0.15s;
}
.form-group textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: var(--font);
  transition: border-color 0.15s;
}
.form-group textarea:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group .error-text {
  color: var(--color-error);
  font-size: 0.8125rem;
  margin-top: 0.25rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--color-primary);
  color: white;
}
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--primary:disabled {
  background: #93c5fd;
  cursor: not-allowed;
}
.btn--danger {
  background: var(--color-error);
  color: white;
}
.btn--danger:hover { background: #b91c1c; }
.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover { background: #f1f5f9; }
.btn--full { width: 100%; }

/* Collapsible */
.collapsible__toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.5rem 0;
  font-family: var(--font);
}
.collapsible__toggle::before {
  content: '\25B6';
  font-size: 0.625rem;
  transition: transform 0.2s;
}
.collapsible__toggle.open::before { transform: rotate(90deg); }
.collapsible__toggle--inline {
  font-size: 0.8125rem;
  padding: 0.25rem 0;
  margin-bottom: 0.25rem;
}
.auth-inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
}
.collapsible__content {
  display: none;
  padding: 0.5rem 0;
}
.collapsible__content.open { display: block; }

/* Progress header */
.progress-header {
  margin-bottom: 1.25rem;
}
.progress-header__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

/* Status ticker — animated current step indicator */
.status-ticker {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  margin-bottom: 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  color: var(--color-text);
  min-height: 2.25rem;
}
.status-ticker__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  animation: ticker-pulse 1.5s ease-in-out infinite;
}
.status-ticker--done .status-ticker__dot {
  background: var(--color-success);
  animation: none;
}
@keyframes ticker-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

/* Progress */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 4px;
  transition: width 0.3s ease;
}
.progress-bar__fill--complete {
  background: var(--color-success);
  animation: pulse-bar 1.5s ease-in-out infinite;
}
@keyframes pulse-bar {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
.progress-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.progress-stats__issues {
  color: var(--color-error);
  font-weight: 600;
}

/* Activity log */
.activity-log {
  max-height: 400px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-top: 1rem;
  font-size: 0.8125rem;
}
.activity-log__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
.activity-log__item:last-child { border-bottom: none; }
.activity-log__icon { flex-shrink: 0; width: 1rem; text-align: center; }
.activity-log__icon--pass { color: var(--color-success); }
.activity-log__icon--fail { color: var(--color-error); }
.activity-log__icon--info { color: var(--color-primary); }

/* Summary card */
.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.summary__stat {
  text-align: center;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}
.summary__stat-value {
  font-size: 1.75rem;
  font-weight: 700;
}
.summary__stat-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.summary__stat--pass .summary__stat-value { color: var(--color-success); }
.summary__stat--fail .summary__stat-value { color: var(--color-error); }

/* Severity groups */
.severity-group {
  margin-bottom: 1rem;
}
.severity-group__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  font-weight: 600;
  font-size: 0.9375rem;
}
.severity-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
}
.severity-badge--critical { background: var(--color-critical); }
.severity-badge--high { background: var(--color-error); }
.severity-badge--medium { background: var(--color-warning); }

/* Result items */
.result-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
}
.result-item__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background 0.1s;
}
.result-item__header:hover { background: var(--color-bg); }
.result-item__url {
  flex: 1;
  font-size: 0.875rem;
  font-family: monospace;
  word-break: break-all;
}
.result-item__chevron {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  transition: transform 0.2s;
}
.result-item__chevron.open { transform: rotate(90deg); }
.result-item__detail {
  display: none;
  padding: 1rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.result-item__detail.open { display: block; }

/* Screenshot viewer */
.screenshot-viewer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.75rem;
}
.screenshot-viewer__panel {
  text-align: center;
}
.screenshot-viewer__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: 0.375rem;
}
.screenshot-viewer__img {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: box-shadow 0.15s;
}
.screenshot-viewer__img:hover { box-shadow: var(--shadow-lg); }

.diff-toggle {
  display: flex;
  justify-content: center;
  margin-top: 0.5rem;
}
.diff-toggle label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  cursor: pointer;
}

/* Content diff */
.content-diff {
  margin-top: 0.75rem;
}
.content-diff__row {
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.8125rem;
}
.content-diff__header {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-secondary);
  border-bottom: 2px solid var(--color-border);
}
.content-diff__header .content-diff__source,
.content-diff__header .content-diff__target {
  color: var(--color-text-secondary);
}
.content-diff__field {
  font-weight: 600;
  color: var(--color-text-secondary);
}
.content-diff__source { color: var(--color-error); }
.content-diff__target { color: var(--color-success); }

/* URL group — visual container for URL + its auth */
.url-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: var(--color-bg);
}
.url-group__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}
.url-group .form-group {
  margin-bottom: 0.5rem;
}
.url-group .collapsible__toggle {
  margin-top: 0.25rem;
}

/* Mode badge in report header */
.report-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.mode-badge {
  display: inline-block;
  padding: 0.1875rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.mode-badge--sitemap {
  background: #dbeafe;
  color: #1d4ed8;
}
.mode-badge--single {
  background: #fef3c7;
  color: #92400e;
}
.mode-badge--urllist {
  background: #ede9fe;
  color: #6d28d9;
}

/* Results section titles */
.results-section-title {
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 0.75rem 0 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.results-section-title--fail {
  color: var(--color-error);
}
.results-section-title--pass {
  color: var(--color-success);
}

/* Result item status icon */
.result-item__status {
  flex-shrink: 0;
  font-size: 0.875rem;
  font-weight: 700;
  width: 1.25rem;
  text-align: center;
}
.result-item__status--pass { color: var(--color-success); }
.result-item__status--fail { color: var(--color-error); }

/* Success state */
.success-state {
  text-align: center;
  padding: 2rem;
}
.success-state__icon {
  font-size: 3rem;
  color: var(--color-success);
}
.success-state__text {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 0.5rem;
}

/* Issue tags — shown inline below result header */
.result-item__issues {
  padding: 0.375rem 1rem 0.5rem 2.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}
.issue-tag {
  display: inline-block;
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius);
  font-size: 0.75rem;
  font-weight: 500;
}
.issue-tag--critical {
  background: #fef2f2;
  color: var(--color-error);
  border: 1px solid #fecaca;
}
.issue-tag--high {
  background: #fef2f2;
  color: var(--color-error);
  border: 1px solid #fecaca;
}
.issue-tag--medium {
  background: #fffbeb;
  color: #92400e;
  border: 1px solid #fde68a;
}

/* Check summary bar inside detail */
.check-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.check-summary__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
}
.check-summary__label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}
.check-summary__detail {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
}

/* Check badges */
.check-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.6875rem;
  font-weight: 600;
}
.check-badge--pass {
  background: #d1fae5;
  color: #065f46;
}
.check-badge--fail {
  background: #fee2e2;
  color: #991b1b;
}
.check-badge--skip {
  background: #f3f4f6;
  color: #6b7280;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.8);
}
.lightbox__content {
  position: relative;
  max-width: 95vw;
  max-height: 95vh;
}
.lightbox__close {
  position: absolute;
  top: -2rem;
  right: -0.5rem;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}
.lightbox__img {
  max-width: 95vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius);
}
.lightbox[hidden] { display: none; }

/* Loading */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error banner */
.error-banner {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 1rem;
  color: var(--color-error);
  margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
  .screenshot-viewer {
    grid-template-columns: 1fr;
  }
  .content-diff__row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
  .auth-inline {
    grid-template-columns: 1fr;
  }
  .summary {
    grid-template-columns: repeat(2, 1fr);
  }
}