:root {
  --gtc-primary: #2563eb;
  --gtc-primary-dark: #1d4ed8;
  --gtc-success: #10b981;
  --gtc-warning: #f59e0b;
  --gtc-danger: #ef4444;
  --gtc-border: #e2e8f0;
  --gtc-shadow: 0 4px 12px rgba(0,0,0,0.08);
  --gtc-accent: #1e293b;
  --gtc-text: #1e293b;
  --gtc-text-muted: #64748b;
  --gtc-bg: #f8fafc;
  --gtc-card-bg: #ffffff;
}

.gtc-container {
  border: 1px solid var(--gtc-border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--gtc-shadow);
  background: var(--gtc-card-bg);
  color: var(--gtc-text);
  max-width: 600px;
}

/* Mode Toggle */
.gtc-mode-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid var(--gtc-primary);
  background: var(--gtc-bg);
}

.gtc-mode-btn {
  flex: 1;
  padding: 12px 16px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--gtc-primary);
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.gtc-mode-btn:hover {
  background: rgba(37, 99, 235, 0.1);
}

.gtc-mode-btn.active {
  background: var(--gtc-primary);
  color: #fff;
}

.gtc-mode-btn .gtc-icon {
  font-size: 16px;
}

/* Form */
.gtc-title {
  margin-bottom: 16px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gtc-text);
}

.gtc-form label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--gtc-text);
}

.gtc-input {
  width: 100%;
  margin-bottom: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 2px solid var(--gtc-border);
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.gtc-input:focus {
  outline: none;
  border-color: var(--gtc-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.gtc-btn {
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gtc-primary), var(--gtc-primary-dark));
  color: #fff;
  border: none;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}

.gtc-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.gtc-btn:active {
  transform: translateY(0);
}

.gtc-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Results */
.gtc-results {
  margin-top: 24px;
  border-top: 1px solid var(--gtc-border);
  padding-top: 20px;
  display: none;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.gtc-results h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.gtc-results h5 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 16px 0 8px;
  color: var(--gtc-text);
}

.gtc-results ul {
  margin: 0;
  padding-left: 20px;
}

.gtc-results li {
  margin-bottom: 4px;
  color: var(--gtc-text-muted);
}

/* Score Display */
.gtc-score-display {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.gtc-score-badge {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.gtc-score-badge.score-low { background: var(--gtc-danger); }
.gtc-score-badge.score-mid { background: var(--gtc-warning); }
.gtc-score-badge.score-high { background: var(--gtc-success); }

/* Spinner */
.gtc-spinner {
  display: none;
  margin-top: 16px;
  align-items: center;
  gap: 10px;
  color: var(--gtc-text-muted);
}

.gtc-spinner::before {
  content: "";
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 3px solid var(--gtc-border);
  border-top-color: var(--gtc-primary);
  display: inline-block;
  animation: gtc-spin 0.8s linear infinite;
}

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

/* Screenreader-only */
.gtc-sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Flags */
.gtc-flags-section h5 span {
  margin-right: 4px;
}

.gtc-red-flags li { color: var(--gtc-danger); }
.gtc-green-flags li { color: var(--gtc-success); }