/* UI layer — dark theme. Parsing/comparison in app.js (unchanged). */

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

:root {
  --bg-primary: #0b0f1a;
  --bg-secondary: #111827;
  --bg-card: #0f172a;
  --border: #1f2937;
  --text-primary: #e5e7eb;
  --text-secondary: #9ca3af;
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;
}

/* Global background + subtle top glow */
body.app-shell {
  position: relative;
  isolation: isolate;
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(ellipse 120% 70% at 50% -25%, rgba(99, 102, 241, 0.22), transparent 50%),
    radial-gradient(circle at 85% 15%, rgba(139, 92, 246, 0.12), transparent 42%),
    radial-gradient(circle at 10% 40%, rgba(59, 130, 246, 0.08), transparent 38%);
  background-attachment: fixed;
}

@media (prefers-reduced-motion: reduce) {
  body.app-shell {
    background-attachment: scroll;
  }

  .results-panel:not(.hidden) {
    animation: none;
  }

  .btn-interactive:hover:not(:disabled),
  .btn-interactive:active:not(:disabled),
  .hero-cta:active {
    transform: none;
  }

  .metric-card-glass:hover,
  .step-card-premium:hover {
    transform: none;
  }

  .coverage-progress-fill {
    transition: background 0.2s ease, box-shadow 0.2s ease;
  }
}

body.app-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: linear-gradient(
      rgba(99, 102, 241, 0.04) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(99, 102, 241, 0.04) 1px,
      transparent 1px
    );
  background-size: 48px 48px;
  mask-image: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.4) 0%,
    rgba(0, 0, 0, 0.12) 60%,
    transparent 95%
  );
}

body.app-shell::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 100% 70% at 50% -35%,
    rgba(139, 92, 246, 0.14),
    transparent 58%
  );
}

.main-glass {
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset,
    0 0 60px rgba(99, 102, 241, 0.08);
}

.hero-band {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

.form-glass {
  box-shadow:
    0 0 48px rgba(99, 102, 241, 0.12),
    0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

.results-panel-glass {
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

.btn-interactive {
  transform: translateZ(0);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    filter 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.btn-interactive:hover:not(:disabled) {
  transform: scale(1.02);
}

.btn-interactive:active:not(:disabled) {
  transform: scale(0.98);
}

.hero-cta:active {
  transform: scale(0.97);
}

.metric-card-glass {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.metric-card-glass:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 28px rgba(0, 0, 0, 0.35),
    0 0 32px rgba(99, 102, 241, 0.12);
}

.step-card-premium {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease;
}

.step-card-premium:hover {
  transform: scale(1.02) translateY(-1px);
  box-shadow:
    0 10px 28px rgba(0, 0, 0, 0.3),
    0 0 24px rgba(99, 102, 241, 0.2);
}

.step-card-premium.step-card--active {
  border-color: rgba(99, 102, 241, 0.55);
  background: linear-gradient(
    145deg,
    rgba(99, 102, 241, 0.12) 0%,
    rgba(17, 24, 39, 0.95) 55%
  );
  box-shadow:
    0 0 0 1px rgba(99, 102, 241, 0.25),
    0 8px 32px rgba(99, 102, 241, 0.18);
}

.step-card-premium.step-card--active .step-card-icon {
  color: #c7d2fe;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.25);
}

.upload-drop-zone--large {
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.25s ease,
    transform 0.2s ease;
}

.upload-drop-zone--large:hover {
  box-shadow:
    0 0 0 1px rgba(99, 102, 241, 0.35),
    0 0 36px rgba(99, 102, 241, 0.2);
}

#collection-drop-zone.upload-drop-zone--large:hover {
  box-shadow:
    0 0 0 1px rgba(139, 92, 246, 0.4),
    0 0 36px rgba(139, 92, 246, 0.22);
}

.coverage-pct-value {
  transition: color 0.35s ease;
  color: #f87171;
}

.coverage-pct-value.coverage-heat-mid {
  color: #fbbf24;
}

.coverage-pct-value.coverage-heat-high {
  color: #4ade80;
}

.coverage-progress-fill {
  width: 0%;
  transition:
    width 0.08s linear,
    background 0.45s ease,
    box-shadow 0.45s ease;
}

.coverage-progress-fill.heat-low {
  background: linear-gradient(90deg, #dc2626, #f97316) !important;
  box-shadow: 0 0 18px rgba(239, 68, 68, 0.45);
}

.coverage-progress-fill.heat-mid {
  background: linear-gradient(90deg, #eab308, #f59e0b) !important;
  box-shadow: 0 0 18px rgba(245, 158, 11, 0.4);
}

.coverage-progress-fill.heat-high {
  background: linear-gradient(90deg, #16a34a, #4ade80) !important;
  box-shadow: 0 0 18px rgba(34, 197, 94, 0.4);
}

/* Smooth transitions for interactive UI (does not touch script logic) */
body.app-shell main button,
body.app-shell main input,
body.app-shell main textarea,
body.app-shell main select,
body.app-shell main summary,
body.app-shell main .upload-drop-zone,
body.app-shell main .step-card,
body.app-shell main .step-card-premium,
body.app-shell main .metric-card,
body.app-shell main .tabs button,
body.app-shell main details summary span {
  transition: all 0.2s ease;
}

.text-gradient-brand {
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Parameter matching explainer (UI only) */
.param-explain-path {
  display: block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.param-explain-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.param-explain-match {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  padding: 0.35rem 0.65rem;
  border-radius: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 600;
  background: rgba(34, 197, 94, 0.15);
  color: #86efac;
  border: 1px solid rgba(34, 197, 94, 0.4);
}

.param-explain-nomatch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.5rem;
  padding: 0.35rem 0.65rem;
  border-radius: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 600;
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.param-explain-divider {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: center;
  padding: 0.35rem 0;
}

.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;
}

#error-banner.hidden {
  display: none;
}

#openapi-load-notice.hidden {
  display: none;
}

#results.hidden {
  display: none;
}

#empty-state.empty-state-hidden {
  display: none;
}

#empty-state.empty-state-visible {
  display: block;
}

/* Tab active (app.js toggles .active only) */
.tabs button.active {
  border-color: var(--accent-indigo);
  background-color: rgba(99, 102, 241, 0.18);
  color: #c7d2fe;
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.2);
}

.tabs button.active[data-tab="missing"] {
  border-color: var(--error);
  background-color: rgba(239, 68, 68, 0.15);
  color: #fecaca;
  box-shadow: 0 0 24px rgba(239, 68, 68, 0.12);
}

.tabs button.active[data-tab="unmatched"] {
  border-color: var(--warning);
  background-color: rgba(245, 158, 11, 0.15);
  color: #fde68a;
  box-shadow: 0 0 24px rgba(245, 158, 11, 0.12);
}

.upload-drop-zone.is-dragover {
  border-color: var(--accent-indigo) !important;
  background-color: rgba(99, 102, 241, 0.12) !important;
}

#collection-drop-zone.is-dragover {
  border-color: var(--accent-purple) !important;
  background-color: rgba(139, 92, 246, 0.12) !important;
}

.results-panel:not(.hidden) {
  animation: results-in 0.5s ease-out;
}

@keyframes results-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.list-badge {
  display: block;
  margin-bottom: 0.35rem;
  padding: 0.35rem 0.65rem;
  border-radius: 0.5rem;
  font-size: 0.8125rem;
  line-height: 1.4;
  border-left: 4px solid;
}

.list-badge--green {
  background: rgba(34, 197, 94, 0.15);
  border-left-color: var(--success);
  color: #86efac;
}

.list-badge--red {
  background: rgba(239, 68, 68, 0.15);
  border-left-color: var(--error);
  color: #fca5a5;
}

.list-badge--yellow {
  background: rgba(245, 158, 11, 0.15);
  border-left-color: var(--warning);
  color: #fcd34d;
}

details summary .details-chevron {
  display: inline-block;
  transition: transform 0.2s ease;
}

details[open] summary .details-chevron {
  transform: rotate(90deg);
}

/* Collapsible tips (GitHub / CORS) above the form */
details[open] > summary .layout-tip-chevron {
  transform: rotate(90deg);
}

details.advanced-details[open] > summary .advanced-chevron {
  transform: rotate(90deg);
}

@media (prefers-reduced-motion: reduce) {
  #run-btn .animate-spin {
    animation: none;
  }

  #run-btn .opacity-75,
  #run-btn .opacity-25 {
    opacity: 0.6;
  }
}

/* Spec + collection both satisfied (UI hint only) */
.swagger-source-shell.panel-input-ready,
.postman-source-shell.panel-input-ready {
  border-color: rgba(34, 197, 94, 0.5);
  background-color: rgba(34, 197, 94, 0.07);
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.2);
}

#swagger-url-field-wrap.swagger-url-invalid .swagger-url-input {
  border-color: rgba(239, 68, 68, 0.65) !important;
  background-color: rgba(239, 68, 68, 0.08) !important;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.25) !important;
  --tw-ring-width: 0 !important;
}