/* style.css — A11y Playground
   Design tokens + all component styles
   ===================================== */

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root, [data-theme="light"] {
  /* --- Surfaces (slightly cooler for a dev tool) --- */
  --color-bg:               #f5f6f7;
  --color-surface:          #f8f9fa;
  --color-surface-2:        #fbfcfd;
  --color-surface-offset:   #eef0f2;
  --color-surface-offset-2: #e8eaed;
  --color-surface-dynamic:  #e2e5e9;
  --color-divider:          #d8dbe0;
  --color-border:           #cdd1d8;

  /* --- Text --- */
  --color-text:         #1a1f2e;
  --color-text-muted:   #6b7280;
  --color-text-faint:   #b0b7c3;
  --color-text-inverse: #f5f6f7;

  /* --- Primary: Blue #006494 --- */
  --color-primary:           #006494;
  --color-primary-hover:     #0b5177;
  --color-primary-active:    #0b3751;
  --color-primary-highlight: #daeaf4;

  /* --- Success (pass) --- */
  --color-success:           #2a7d1c;
  --color-success-hover:     #1d5f12;
  --color-success-active:    #134209;
  --color-success-highlight: #d4f0cd;

  /* --- Error / Critical --- */
  --color-error:           #c0392b;
  --color-error-hover:     #a93226;
  --color-error-active:    #922b21;
  --color-error-highlight: #fde8e6;

  /* --- Warning / Major --- */
  --color-warning:           #b55a00;
  --color-warning-hover:     #994200;
  --color-warning-active:    #7d2f00;
  --color-warning-highlight: #fdebd0;

  /* --- Notification / Minor --- */
  --color-notification:           #946c00;
  --color-notification-hover:     #7a5700;
  --color-notification-active:    #5e4100;
  --color-notification-highlight: #fef3d0;

  /* --- Radius --- */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* --- Transitions --- */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow:        360ms cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px oklch(0.18 0.02 230 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.18 0.02 230 / 0.09);
  --shadow-lg: 0 12px 32px oklch(0.18 0.02 230 / 0.13);

  /* --- Content widths --- */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* --- Font families --- */
  --font-display: 'Geist', 'SF Pro Display', system-ui, sans-serif;
  --font-body:    'DM Sans', 'SF Pro Text', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;

  /* --- Type scale (fluid) --- */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.9rem  + 0.5vw,  1.125rem);
  --text-lg:   clamp(1.125rem, 0.95rem + 0.85vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1rem    + 1.5vw,  2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* --- Spacing (4px grid) --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* ============================================
   DARK MODE
   ============================================ */
[data-theme="dark"] {
  --color-bg:               #0d1117;
  --color-surface:          #161b22;
  --color-surface-2:        #1c2128;
  --color-surface-offset:   #1a1f27;
  --color-surface-offset-2: #21262d;
  --color-surface-dynamic:  #2d333b;
  --color-divider:          #21262d;
  --color-border:           #30363d;

  --color-text:         #c9d1d9;
  --color-text-muted:   #8b949e;
  --color-text-faint:   #484f58;
  --color-text-inverse: #0d1117;

  --color-primary:           #58a6ff;
  --color-primary-hover:     #79b8ff;
  --color-primary-active:    #a5c8ff;
  --color-primary-highlight: #1f3a5f;

  --color-success:           #3fb950;
  --color-success-hover:     #2ea043;
  --color-success-active:    #238636;
  --color-success-highlight: #1a3a23;

  --color-error:           #f85149;
  --color-error-hover:     #ff7b72;
  --color-error-active:    #ffa198;
  --color-error-highlight: #3d1a19;

  --color-warning:           #d29922;
  --color-warning-hover:     #e3b341;
  --color-warning-active:    #f0c04a;
  --color-warning-highlight: #2f2410;

  --color-notification:           #d4a843;
  --color-notification-hover:     #e8c374;
  --color-notification-active:    #f0d495;
  --color-notification-highlight: #302610;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:               #0d1117;
    --color-surface:          #161b22;
    --color-surface-2:        #1c2128;
    --color-surface-offset:   #1a1f27;
    --color-surface-offset-2: #21262d;
    --color-surface-dynamic:  #2d333b;
    --color-divider:          #21262d;
    --color-border:           #30363d;
    --color-text:         #c9d1d9;
    --color-text-muted:   #8b949e;
    --color-text-faint:   #484f58;
    --color-text-inverse: #0d1117;
    --color-primary:           #58a6ff;
    --color-primary-hover:     #79b8ff;
    --color-primary-active:    #a5c8ff;
    --color-primary-highlight: #1f3a5f;
    --color-success:           #3fb950;
    --color-success-hover:     #2ea043;
    --color-success-highlight: #1a3a23;
    --color-error:           #f85149;
    --color-error-hover:     #ff7b72;
    --color-error-highlight: #3d1a19;
    --color-warning:           #d29922;
    --color-warning-hover:     #e3b341;
    --color-warning-highlight: #2f2410;
    --color-notification:           #d4a843;
    --color-notification-hover:     #e8c374;
    --color-notification-highlight: #302610;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.4);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.5);
  }
}

/* ============================================
   LAYOUT
   ============================================ */

/* Skip to content */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 9999;
  padding: var(--space-2) var(--space-5);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-6)));
  transition: transform var(--transition-interactive);
  box-shadow: var(--shadow-md);
}
.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Site header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-3) var(--space-6);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.wcag-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
  border: 1px solid transparent;
}
.btn-icon:hover {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
  border-color: var(--color-border);
}

/* Main content */
.main-content {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================================
   HERO / INPUT SECTION
   ============================================ */
.hero {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0 clamp(var(--space-8), 5vw, var(--space-16));
  text-align: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.hero-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--color-text);
  line-height: 1.0;
  margin-bottom: var(--space-5);
}

.hero-title .accent {
  color: var(--color-primary);
}

.hero-subtitle {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 52ch;
  margin: 0 auto var(--space-10);
}

/* URL Input Form */
.audit-form {
  max-width: 680px;
  margin: 0 auto var(--space-10);
}

.input-group {
  display: flex;
  align-items: stretch;
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.input-group:focus-within {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), 0 0 0 3px color-mix(in oklab, var(--color-primary) 16%, transparent);
}

.url-prefix {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-5);
  color: var(--color-text-faint);
  flex-shrink: 0;
  pointer-events: none;
}

.url-input {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  border: none;
  background: transparent;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
  min-width: 0;
}

.url-input::placeholder {
  color: var(--color-text-faint);
  font-family: var(--font-body);
}

.url-input:focus { outline: none; }

.btn-run-audit {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  cursor: pointer;
  border-radius: 0 calc(var(--radius-xl) - 2px) calc(var(--radius-xl) - 2px) 0;
  transition: background var(--transition-interactive);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-run-audit:hover { background: var(--color-primary-hover); }
.btn-run-audit:active { background: var(--color-primary-active); }
.btn-run-audit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-run-audit .spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-run-audit.loading .spinner { display: block; }
.btn-run-audit.loading .btn-label { display: none; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Quick stats pills */
.quick-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
}

.stat-pill svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

/* ============================================
   LOADING STATE
   ============================================ */
.loading-state {
  display: none;
  padding: clamp(var(--space-8), 6vw, var(--space-16)) 0;
  text-align: center;
}
.loading-state.visible { display: block; }

.progress-ring-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.progress-ring-svg {
  transform: rotate(-90deg);
}
.progress-ring-bg {
  fill: none;
  stroke: var(--color-surface-offset-2);
  stroke-width: 4;
}
.progress-ring-fill {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  transition: stroke-dashoffset 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.loading-status {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 1.5em;
  transition: opacity 0.3s ease;
}

.loading-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 360px;
  margin: var(--space-6) auto 0;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  transition: color var(--transition-interactive);
}
.loading-step.active { color: var(--color-text-muted); }
.loading-step.done { color: var(--color-success); }

.step-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   RESULTS DASHBOARD
   ============================================ */
.results-section {
  display: none;
  opacity: 0;
  padding-bottom: var(--space-24);
}
.results-section.visible {
  display: block;
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-divider);
}

.results-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.results-url {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  word-break: break-all;
}

.results-timestamp {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.results-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-interactive);
  text-decoration: none;
}
.btn-action:hover {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
  border-color: var(--color-text-faint);
}

/* Score + Summary Row */
.score-summary-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-8);
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 600px) {
  .score-summary-row {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* Score gauge */
.score-gauge {
  position: relative;
  width: 140px;
  height: 140px;
  flex-shrink: 0;
  margin: 0 auto;
}

.score-gauge svg {
  transform: rotate(-90deg);
}

.score-gauge-bg {
  fill: none;
  stroke: var(--color-surface-offset-2);
  stroke-width: 8;
}

.score-gauge-fill {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 345;
  stroke-dashoffset: 345;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.16, 1, 0.3, 1),
              stroke 0.3s ease;
}

.score-gauge-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.score-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  transition: color 0.3s ease;
}

.score-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.score-excellent { color: var(--color-success); stroke: var(--color-success); }
.score-good { color: var(--color-warning); stroke: var(--color-warning); }
.score-needs-work { color: var(--color-notification); stroke: var(--color-notification); }
.score-poor { color: var(--color-error); stroke: var(--color-error); }

/* Issue summary */
.summary-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.summary-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.summary-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.severity-counts {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.severity-count {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
}
.severity-count.critical {
  background: var(--color-error-highlight);
  color: var(--color-error);
}
.severity-count.major {
  background: var(--color-warning-highlight);
  color: var(--color-warning);
}
.severity-count.minor {
  background: var(--color-notification-highlight);
  color: var(--color-notification);
}

/* Category Cards Grid */
.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: all var(--transition-interactive);
  text-align: left;
  position: relative;
  overflow: hidden;
}
.category-card:hover {
  background: var(--color-surface-2);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.category-card.active {
  border-color: var(--color-primary);
  background: color-mix(in oklab, var(--color-primary) 4%, var(--color-surface));
}

.category-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
  background: var(--color-primary-highlight);
}

.category-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.category-status {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.category-status.has-issues { color: var(--color-error); }
.category-status.all-clear { color: var(--color-success); }

.category-score {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.score-bar {
  flex: 1;
  height: 4px;
  background: var(--color-surface-offset-2);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.score-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
  width: 0%;
}
.score-bar-fill.excellent { background: var(--color-success); }
.score-bar-fill.good { background: var(--color-warning); }
.score-bar-fill.poor { background: var(--color-error); }

.score-bar-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.expand-arrow {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  color: var(--color-text-faint);
  transition: transform var(--transition-interactive);
}
.category-card.active .expand-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

/* ============================================
   ISSUES LIST (expandable)
   ============================================ */
.issues-panel {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}
.issues-panel.visible { display: block; animation: fadeInUp 0.25s ease; }

.issues-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-offset);
}

.issues-panel-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.issue-count-badge {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-offset-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}

.issue-item {
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-interactive);
}
.issue-item:last-child { border-bottom: none; }
.issue-item:hover { background: var(--color-surface-2); }

.issue-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.issue-badges {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.severity-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.severity-badge.critical { background: var(--color-error-highlight); color: var(--color-error); }
.severity-badge.major    { background: var(--color-warning-highlight); color: var(--color-warning); }
.severity-badge.minor    { background: var(--color-notification-highlight); color: var(--color-notification); }

.wcag-ref {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-interactive);
}
.wcag-ref:hover {
  background: var(--color-primary);
  color: #fff;
}

.issue-description {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  font-weight: 500;
}

.issue-element {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  overflow-x: auto;
  margin-bottom: var(--space-4);
  white-space: pre;
  line-height: 1.5;
}

.issue-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 600px) {
  .issue-detail-grid { grid-template-columns: 1fr; }
}

.issue-detail-block {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.issue-detail-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}

.issue-detail-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.issue-fix-block {
  grid-column: 1 / -1;
  background: color-mix(in oklab, var(--color-success) 5%, var(--color-surface-2));
  border: 1px solid color-mix(in oklab, var(--color-success) 25%, var(--color-divider));
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.issue-fix-code {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
  overflow-x: auto;
  white-space: pre;
  margin: var(--space-2) 0;
  line-height: 1.5;
}

.btn-copy-fix {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-success-highlight);
  color: var(--color-success);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-interactive);
  margin-top: var(--space-2);
}
.btn-copy-fix:hover { opacity: 0.8; }
.btn-copy-fix.copied {
  background: var(--color-success);
  color: #fff;
}

/* Empty state (all clear) */
.empty-state {
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  background: var(--color-success-highlight);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-success);
  margin: 0 auto var(--space-4);
}

.empty-state-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.empty-state-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============================================
   EDUCATIONAL FOOTER
   ============================================ */
.edu-section {
  margin-top: var(--space-12);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) 0;
}

.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}
@media (max-width: 768px) {
  .edu-grid { grid-template-columns: 1fr; }
}

.edu-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.edu-card-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.edu-card-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  max-width: 60ch;
}

.edu-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.edu-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: gap var(--transition-interactive);
}
.edu-link:hover { gap: var(--space-3); text-decoration: underline; }

/* Success criteria list */
.criteria-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.criteria-item {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--transition-interactive);
}
.criteria-item:hover { background: var(--color-surface-offset); }

.criteria-id {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  min-width: 40px;
  flex-shrink: 0;
}
.criteria-name {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.criteria-level {
  margin-left: auto;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 1px var(--space-2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.level-a {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}
.level-aa {
  background: var(--color-warning-highlight);
  color: var(--color-warning);
}
.level-aaa {
  background: var(--color-error-highlight);
  color: var(--color-error);
}

/* ============================================
   SITE FOOTER
   ============================================ */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-6);
  text-align: center;
  margin-top: var(--space-12);
}
.site-footer p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  max-width: 100%;
}

/* ============================================
   UTILITY
   ============================================ */
.hidden { display: none !important; }

/* Notification toast */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text);
  box-shadow: var(--shadow-lg);
  z-index: 9998;
  transform: translateY(calc(100% + var(--space-6)));
  transition: transform var(--transition-interactive);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.toast.visible { transform: translateY(0); }

/* Error state */
.error-state {
  display: none;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}
.error-state.visible { display: block; animation: fadeInUp 0.3s ease; }

.error-icon {
  width: 48px;
  height: 48px;
  background: var(--color-error-highlight);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-error);
  margin: 0 auto var(--space-4);
}

.error-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.error-message {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.btn-try-again {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-interactive);
}
.btn-try-again:hover { background: var(--color-primary-hover); }

/* ============================================
   SAMPLE PICKER + HTML BOX (static demo: replaces the URL input)
   ============================================ */
.audit-form { max-width: 820px; text-align: left; }
.sample-picker { border: 0; margin: 0 0 var(--space-5); padding: 0; min-width: 0; }
.sample-legend, .html-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.html-label span { text-transform: none; letter-spacing: 0; font-weight: 500; color: var(--color-text-faint); margin-left: var(--space-2); }
.sample-chips { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); gap: var(--space-2); }
.sample-chip { position: relative; display: block; cursor: pointer; }
.sample-chip input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.sample-chip span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  height: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.sample-chip b { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.sample-chip small { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.35; }
.sample-chip:hover span { border-color: var(--color-text-faint); }
.sample-chip input:checked + span { border-color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 6%, var(--color-surface)); }
.sample-chip input:focus-visible + span { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.html-input {
  display: block;
  width: 100%;
  min-height: 220px;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.55;
  color: var(--color-text);
  resize: vertical;
  tab-size: 2;
}
.html-input:focus { outline: none; border-color: var(--color-primary); box-shadow: var(--shadow-md), 0 0 0 3px color-mix(in oklab, var(--color-primary) 16%, transparent); }
.html-input::placeholder { color: var(--color-text-faint); font-family: var(--font-body); font-size: var(--text-sm); }
.audit-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-top: var(--space-4); }
.audit-note { font-size: var(--text-xs); color: var(--color-text-muted); max-width: 52ch; }
.audit-row .btn-run-audit { border-radius: var(--radius-lg); padding: var(--space-3) var(--space-8); min-height: 44px; }
@media (max-width: 560px) {
  .audit-row { flex-direction: column; align-items: stretch; }
  .audit-row .btn-run-audit { justify-content: center; }
  .html-input { min-height: 180px; }
}

/* ============================================
   LAB SECOND PASS: score note, severity filter, layout and touch targets
   ============================================ */
.score-note { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: calc(-1 * var(--space-2)); }
.score-how { font-size: var(--text-sm); color: var(--color-text-muted); }
.score-how summary {
  display: inline-flex; align-items: center; gap: var(--space-2); min-height: 36px; cursor: pointer;
  color: var(--color-primary); font-weight: 600; list-style: none; border-radius: var(--radius-sm);
}
.score-how summary::-webkit-details-marker { display: none; }
.score-how summary::before { content: '›'; display: inline-block; font-size: 1.2em; transition: transform var(--transition-interactive); }
.score-how[open] summary::before { transform: rotate(90deg); }
.score-how summary:hover { text-decoration: underline; }
.score-how ul { margin: var(--space-2) 0 0; padding-left: var(--space-5); display: grid; gap: var(--space-2); line-height: 1.55; }
.score-how b { color: var(--color-text); }
@media (max-width: 600px) { .score-how { text-align: left; } .score-note { margin-top: 0; } }

.results-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap;
  margin: calc(-1 * var(--space-3)) 0 var(--space-5);
}
.sev-filter { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.sev-chip {
  display: inline-flex; align-items: center; gap: var(--space-2); min-height: 40px; padding: 0 var(--space-4);
  border: 1.5px solid var(--color-border); border-radius: var(--radius-full); background: var(--color-surface);
  font-size: var(--text-sm); font-weight: 600; color: var(--color-text-muted); cursor: pointer;
  transition: border-color var(--transition-interactive), background var(--transition-interactive), color var(--transition-interactive);
}
.sev-chip span { font-family: var(--font-mono); font-size: var(--text-xs); padding: 1px 7px; border-radius: var(--radius-full); background: var(--color-surface-offset-2); color: var(--color-text); }
.sev-chip:hover { border-color: var(--color-text-faint); color: var(--color-text); }
.sev-chip[aria-pressed="true"] { border-color: var(--color-primary); color: var(--color-primary); background: color-mix(in oklab, var(--color-primary) 7%, var(--color-surface)); }
.sev-chip.critical[aria-pressed="true"] { border-color: var(--color-error); color: var(--color-error); background: var(--color-error-highlight); }
.sev-chip.major[aria-pressed="true"] { border-color: var(--color-warning); color: var(--color-warning); background: var(--color-warning-highlight); }
.sev-chip.minor[aria-pressed="true"] { border-color: var(--color-notification); color: var(--color-notification); background: var(--color-notification-highlight); }
.sev-chip:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.filter-empty { padding: var(--space-8) var(--space-6); text-align: center; color: var(--color-text-muted); font-size: var(--text-sm); }

/* What's wrong | How to fix side by side on wide screens */
@media (min-width: 900px) {
  .issue-detail-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); align-items: start; }
  .issue-fix-block { grid-column: auto; }
}
@media (max-width: 899px) { .issue-detail-grid { grid-template-columns: 1fr; } }
.issues-panel-title { display: inline-flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.btn-copy-fix { min-height: 36px; padding: var(--space-1) var(--space-4); }
.category-score .score-bar-label { min-width: 4.5ch; text-align: right; }

/* Phones: 44px touch targets */
@media (max-width: 600px) {
  .btn-copy-fix, .sev-chip, .btn-action, .btn-icon, .wcag-ref, .score-how summary, .btn-try-again { min-height: 44px; }
  .btn-icon { min-width: 44px; }
  .logo { min-height: 44px; }
  .wcag-ref { display: inline-flex; align-items: center; }
  .results-actions { width: 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2); }
  .results-actions .btn-action { justify-content: center; padding-inline: var(--space-2); }
  .results-toolbar { flex-direction: column; align-items: stretch; }
  .sev-filter { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sev-chip { justify-content: center; }
  .edu-link { min-height: 44px; }
  .sample-chip span { min-height: 44px; }
}

/* Category cards: one row of five on desktop, 2 columns on tablets (the odd one out spans the row), 1 column on phones */
@media (min-width: 960px) { .category-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
@media (min-width: 520px) and (max-width: 959px) {
  .category-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-grid .category-card:last-child:nth-child(odd) { grid-column: 1 / -1; }
}
@media (max-width: 519px) { .category-grid { grid-template-columns: 1fr; } }