:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #cbd5e1;
  --accent-bg: #f1f5f9;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #ca8a04;
  --warning-bg: #fefce8;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --focus-ring: #2563eb;
  --base-font-size: 16px;
}

/* High Contrast Theme Override */
body.high-contrast {
  --bg: #000000;
  --card-bg: #121212;
  --text: #ffffff;
  --text-muted: #e2e8f0;
  --border: #ffffff;
  --accent-bg: #1e1e1e;
  --primary: #ffff00;
  --primary-hover: #e6e600;
  --focus-ring: #ffff00;
  --danger-bg: #3b0000;
  --danger: #ff6b6b;
  --success-bg: #003b00;
  --success: #4ade80;
}

html {
  font-size: var(--base-font-size);
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 1.5rem;
  line-height: 1.6;
  transition: background-color 0.2s, color 0.2s;
}

/* Accessibility Toolbar */
.a11y-toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
  background: var(--card-bg);
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.a11y-toolbar span {
  font-weight: 700;
  margin-right: auto;
}

.a11y-btn {
  background: var(--accent-bg);
  color: var(--text);
  border: 2px solid var(--border);
  padding: 0.5rem 0.85rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
  min-height: 44px; /* Accessible minimum touch target */
}

.a11y-btn:hover, .a11y-btn:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

body.high-contrast .a11y-btn {
  color: #000000;
  background: #ffff00;
  border-color: #ffffff;
}

/* Container & Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

h1 {
  font-size: 2.2rem;
  margin: 0 0 0.5rem 0;
}

.gdpr-badge {
  display: inline-block;
  background-color: var(--accent-bg);
  color: var(--text);
  border: 2px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 0.5rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* Responsive collapse for zoom levels or mobile screens */
@media (max-width: 820px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card-bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

textarea {
  width: 100%;
  height: 180px;
  padding: 0.85rem;
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 8px;
  box-sizing: border-box;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
}

input[type="file"] {
  width: 100%;
  padding: 0.75rem;
  background: var(--card-bg);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  box-sizing: border-box;
}

textarea:focus-visible, input:focus-visible, button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn-primary {
  width: 100%;
  background-color: var(--primary);
  color: #ffffff;
  border: 2px solid var(--border);
  padding: 1rem;
  font-size: 1.15rem;
  font-weight: 800;
  border-radius: 8px;
  cursor: pointer;
  min-height: 50px;
}

body.high-contrast .btn-primary {
  color: #000000;
  background-color: #ffff00;
}

.hidden { display: none !important; }

/* Score & Output Layout */
.score-box {
  text-align: center;
  padding: 1.25rem;
  background: var(--accent-bg);
  border: 2px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1.5rem;
}

.score-number {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--primary);
}

body.high-contrast .score-number {
  color: #ffff00;
}

.breakdown h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

#feedback-list {
  padding-left: 1.25rem;
  margin: 0;
}

#feedback-list li {
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
  line-height: 1.5;
}

.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.tag {
  background: var(--danger-bg);
  color: var(--danger);
  border: 2px solid var(--danger);
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
}

body.high-contrast .tag {
  background: #3b0000;
  color: #ff6b6b;
  border-color: #ff6b6b;
}

.placeholder-text {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1rem;
  font-size: 1.1rem;
}