/* CSV JSON Converter Styles */
.hidden { display: none !important; }

/* Direction Bar */
.direction-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
}
.direction-label {
  font-weight: 700;
  font-size: 1rem;
  padding: 8px 20px;
  border-radius: 6px;
  min-width: 64px;
  text-align: center;
}
.direction-label.active {
  background: var(--accent);
  color: white;
}
.direction-label.inactive {
  background: var(--bg-color);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}
[data-theme="dark"] .direction-label.inactive {
  background: var(--card-bg);
}
.swap-direction-btn {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.swap-direction-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.swap-direction-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.swap-direction-btn svg {
  width: 20px;
  height: 20px;
}

/* Sample Buttons */
.sample-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}
.btn-sample {
  flex: 1;
  padding: 10px 16px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
  font-family: var(--font-family);
  color: var(--text-main);
  min-height: 42px;
}
.btn-sample:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-sample:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-sample svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
[data-theme="dark"] .btn-sample {
  background: var(--card-bg);
}

/* Editor Grid */
.editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.editor-box {
  display: flex;
  flex-direction: column;
}
.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.editor-title {
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}
.editor-title svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

/* File Ribbon */
.file-ribbon {
  padding: 10px 16px;
  background: var(--bg-color);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  cursor: pointer;
  transition: var(--transition);
}
.file-ribbon:hover,
.file-ribbon.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}
.file-ribbon:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.file-ribbon-text {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.file-ribbon-text svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
[data-theme="dark"] .file-ribbon {
  background: var(--card-bg);
}
[data-theme="dark"] .file-ribbon:hover,
[data-theme="dark"] .file-ribbon.dragover {
  background: rgba(59, 130, 246, 0.08);
}

/* Editor Areas */
.editor-area {
  width: 100%;
  min-height: 220px;
  padding: 14px;
  background: var(--bg-color);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: 'SFMono-Regular', Consolas, 'Courier New', monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  resize: vertical;
  transition: var(--transition);
  box-sizing: border-box;
}
.editor-area:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.editor-area::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}
.editor-area[readonly] {
  cursor: default;
}
[data-theme="dark"] .editor-area {
  background: var(--card-bg);
}

/* Stats */
.stat-item {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
  text-align: right;
}

/* Options Bar */
.options-bar {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  padding: 14px 20px;
  background: var(--bg-color);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}
[data-theme="dark"] .options-bar {
  background: var(--card-bg);
}
.option-group {
  display: flex;
  align-items: center;
  gap: 10px;
}
.option-group label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-main);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  width: 46px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--border-color);
  border-radius: 24px;
  transition: var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
}
.toggle-switch input:checked + .toggle-slider {
  background: var(--accent);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(22px);
}
.toggle-switch input:focus-visible + .toggle-slider {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.action-buttons .btn {
  flex: 1;
  min-width: 100px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  padding: 10px 20px;
}
.action-buttons .btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Converter Error */
.converter-error {
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-top: 14px;
  font-weight: 500;
  font-size: 0.9rem;
  border: 1px solid rgba(239, 68, 68, 0.2);
  display: none;
  align-items: center;
  gap: 8px;
}
.converter-error.show {
  display: flex;
}
.converter-error svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
[data-theme="dark"] .converter-error {
  background: rgba(239, 68, 68, 0.12);
}

/* Privacy Notice */
.privacy-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-md);
  color: #10b981;
  font-size: 0.88rem;
  font-weight: 600;
  margin-top: 20px;
}
.privacy-notice svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
[data-theme="dark"] .privacy-notice {
  background: rgba(16, 185, 129, 0.1);
}

/* Toast */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--card-bg);
  color: var(--text-main);
  padding: 14px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  font-weight: 600;
  font-size: 0.9rem;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  border-left: 4px solid #10b981;
  max-width: 360px;
  pointer-events: none;
}
.toast-notification.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.toast-notification.error {
  border-left-color: #ef4444;
}
.toast-notification svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
[data-theme="dark"] .toast-notification {
  background: var(--card-bg);
  border-color: var(--border-color);
}

/* Dark Mode Overrides */
[data-theme="dark"] .editor-box .editor-title {
  color: var(--text-main);
}
[data-theme="dark"] .btn-sample {
  color: var(--text-main);
}

/* How It Works / Content Cards (share with other tools) */
.content-section {
  padding: 64px 0;
}
.content-section.bg-alt {
  background: var(--bg-color);
}
.content-section h2 {
  text-align: center;
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-main);
  letter-spacing: -0.5px;
}
.content-section > .container > p {
  text-align: center;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 48px;
  line-height: 1.7;
  font-size: 1rem;
}
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.content-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: var(--transition);
}
.content-card:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow-hover);
}
.content-card .card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.content-card .card-icon svg {
  width: 26px;
  height: 26px;
}
.content-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}
.content-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.feature-item {
  text-align: center;
  padding: 28px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  transition: var(--transition);
}
.feature-item:hover {
  border-color: var(--accent);
  box-shadow: var(--card-shadow-hover);
}
.feature-item svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
  margin-bottom: 14px;
}
.feature-item h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.feature-item p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* Related Tools */
.related-tools {
  padding: 60px 0;
  background: var(--bg-color);
  text-align: center;
}
.related-tools h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 32px;
  color: var(--text-main);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  max-width: 700px;
  margin: 0 auto;
}
.related-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
  transition: var(--transition);
}
.related-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--card-shadow-hover);
}
.related-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--accent);
}

/* Knowledge Section (Understanding CSV/JSON) */
.knowledge-section {
  padding: 60px 0;
}
.knowledge-section .container {
  max-width: 860px;
  margin: 0 auto;
}
.knowledge-section h2 {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 32px;
  color: var(--text-main);
}
.knowledge-section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-main);
}
.knowledge-section p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.knowledge-section ul {
  padding-left: 24px;
  margin-bottom: 20px;
}
.knowledge-section ul li {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 6px;
}

/* Responsive */
@media (max-width: 1024px) {
  .editor-grid { gap: 16px; }
}
@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; gap: 20px; }
  .feature-grid { grid-template-columns: 1fr; gap: 20px; }
  .content-section { padding: 48px 0; }
}
@media (max-width: 768px) {
  .editor-grid { grid-template-columns: 1fr; }
  .action-buttons { flex-direction: column; }
  .action-buttons .btn { width: 100%; }
  .sample-buttons { flex-direction: column; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .content-section > .container > p { margin-bottom: 32px; }
}
@media (max-width: 600px) {
  .direction-bar { gap: 8px; }
  .direction-label { padding: 6px 14px; font-size: 0.9rem; min-width: 54px; }
  .swap-direction-btn { width: 36px; height: 36px; }
  .swap-direction-btn svg { width: 18px; height: 18px; }
  .options-bar { flex-direction: column; align-items: center; gap: 12px; }
  .content-section h2 { font-size: 1.35rem; }
  .related-grid { grid-template-columns: 1fr; }
  .knowledge-section { padding: 40px 16px; }
}
@media (max-width: 425px) {
  .tool-card { padding: 20px 16px; }
  .editor-area { min-height: 160px; font-size: 0.82rem; padding: 10px; }
  .btn-sample { font-size: 0.8rem; padding: 8px 12px; min-height: 38px; }
  .content-card { padding: 24px 16px; }
  .feature-item { padding: 24px 16px; }
}
@media (max-width: 375px) {
  .direction-label { padding: 5px 10px; font-size: 0.82rem; min-width: 46px; }
  .action-buttons .btn { font-size: 0.82rem; padding: 8px 14px; min-height: 40px; }
}
@media (max-width: 320px) {
  .tool-card { padding: 16px 12px; }
  .editor-area { min-height: 140px; }
}