/* Great Circle Flight Distance Calculator Styles */
.gcfd-main {
  max-width: 1050px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

.gcfd-card {
  background: var(--tf-surface, #ffffff);
  border: 1px solid var(--tf-border, #e2e8f0);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.gcfd-header-area {
  margin-bottom: 1.25rem;
}

.gcfd-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  color: var(--tf-text, #0f172a);
}

.gcfd-subtitle {
  font-size: 0.95rem;
  color: var(--tf-muted, #64748b);
  margin: 0;
}

.gcfd-mode-bar {
  margin-bottom: 1.25rem;
}

.gcfd-toggle-group {
  display: flex;
  background: var(--tf-bg-alt, #f1f5f9);
  padding: 0.25rem;
  border-radius: 6px;
  gap: 0.25rem;
}

@media (max-width: 640px) {
  .gcfd-toggle-group {
    flex-direction: column;
  }
}

.gcfd-mode-btn {
  flex: 1;
  padding: 0.55rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  background: transparent;
  color: var(--tf-muted, #64748b);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.gcfd-mode-btn:hover {
  color: var(--tf-text, #0f172a);
}

.gcfd-mode-active {
  background: var(--tf-surface, #ffffff);
  color: var(--tf-accent, #2563eb);
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
}

.gcfd-input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .gcfd-input-grid {
    grid-template-columns: 1fr;
  }
}

.gcfd-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.gcfd-w-auto {
  flex: 1;
}

.gcfd-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tf-text, #1e293b);
}

.gcfd-select,
.gcfd-input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--tf-border, #cbd5e1);
  border-radius: 6px;
  font-size: 0.9rem;
  background: var(--tf-surface, #ffffff);
  color: var(--tf-text, #0f172a);
  box-sizing: border-box;
}

.gcfd-coords-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--tf-bg-alt, #f8fafc);
  padding: 0.85rem;
  border: 1px solid var(--tf-border, #e2e8f0);
  border-radius: 6px;
}

.gcfd-sub-heading {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--tf-text, #0f172a);
}

.gcfd-coords-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.gcfd-aircraft-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.gcfd-btn-sm {
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid var(--tf-border, #cbd5e1);
  background: var(--tf-surface, #ffffff);
  color: var(--tf-text, #334155);
  cursor: pointer;
}

.gcfd-btn-sm:hover {
  background: var(--tf-bg-alt, #f1f5f9);
}

.gcfd-actions-row {
  margin-bottom: 1.5rem;
}

.gcfd-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s ease, opacity 0.15s ease;
}

.gcfd-btn-primary {
  background: var(--tf-accent, #2563eb);
  color: #ffffff;
}

.gcfd-btn-primary:hover {
  opacity: 0.9;
}

.gcfd-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.gcfd-kpi-card {
  background: var(--tf-bg-alt, #f8fafc);
  border: 1px solid var(--tf-border, #e2e8f0);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.gcfd-kpi-highlight {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.gcfd-kpi-highlight .gcfd-kpi-val {
  color: var(--tf-accent, #2563eb);
}

.gcfd-kpi-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--tf-muted, #64748b);
}

.gcfd-kpi-val {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--tf-text, #0f172a);
}

.gcfd-kpi-sub {
  font-size: 0.75rem;
  color: var(--tf-muted, #64748b);
}

.gcfd-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.gcfd-meta-col {
  display: flex;
  flex-direction: column;
}

.gcfd-meta-card {
  background: var(--tf-surface, #ffffff);
  border: 1px solid var(--tf-border, #e2e8f0);
  border-radius: 6px;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.gcfd-meta-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--tf-muted, #64748b);
  text-transform: uppercase;
}

.gcfd-meta-val {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tf-text, #0f172a);
}

.gcfd-meta-desc {
  font-size: 0.75rem;
  color: var(--tf-muted, #64748b);
}

.gcfd-route-schematic {
  background: var(--tf-bg-alt, #f8fafc);
  border: 1px solid var(--tf-border, #e2e8f0);
  border-radius: 8px;
  padding: 1.25rem;
}

.gcfd-schematic-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.85rem 0;
  color: var(--tf-text, #1e293b);
}

.gcfd-svg-wrap {
  width: 100%;
  overflow: hidden;
  border-radius: 6px;
  border: 1px solid var(--tf-border, #e2e8f0);
}

.gcfd-svg-canvas {
  width: 100%;
  height: auto;
  display: block;
}

.gcfd-feedback {
  margin-top: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  min-height: 1.25rem;
}

.gcfd-feedback-error {
  color: #dc2626;
}

.gcfd-feedback-success {
  color: #16a34a;
}