/* ==============================================
   Text Diff Tool Styles
   Matches existing tool theme (warm cream/beige)
   ============================================== */

.diff-page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 15px 40px;
  background: #faf8f5;
  min-height: 100vh;
}

.diff-tool {
  max-width: 1200px;
  width: 100%;
  padding: 0;
  background: #faf8f5;
}

body:has(.diff-tool) {
  background: #faf8f5 !important;
}

/* Tool Header */
.diff-tool .tool-header {
  text-align: center;
  margin-bottom: 24px;
  padding: 40px 30px;
  background: linear-gradient(135deg, #292524 0%, #44403c 100%);
  border-radius: 16px;
  color: #faf8f5;
  box-shadow: 0 4px 20px rgba(41, 37, 36, 0.2);
  position: relative;
  overflow: hidden;
}

.diff-tool .tool-title {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 2rem;
  font-weight: 800;
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #faf8f5;
  position: relative;
  z-index: 1;
}

.diff-tool .tool-title i {
  font-size: 1.6rem;
  color: #fef3c7;
}

.diff-tool .tool-subtitle {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  color: #d6d3d1;
  margin: 0;
  opacity: 0.85;
  position: relative;
  z-index: 1;
}

/* Tool Intro */
.diff-tool .tool-intro {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
  color: #57534e;
  line-height: 1.7;
  text-align: center;
  margin: 0 auto 24px;
  padding: 0 16px;
  max-width: 800px;
}

.diff-tool .tool-intro strong {
  color: #44403c;
}

/* Diff Main */
.diff-tool .diff-main {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
}

/* Input Panels */
.diff-tool .input-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.diff-tool .input-panel {
  display: flex;
  flex-direction: column;
}

.diff-tool .panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.diff-tool .panel-header label {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: #57534e;
  display: flex;
  align-items: center;
  gap: 6px;
}

.diff-tool .panel-header label i {
  color: #78716c;
  font-size: 0.8rem;
}

.diff-tool .btn-clear {
  background: transparent;
  border: none;
  color: #a8a29e;
  cursor: pointer;
  padding: 4px 6px;
  font-size: 0.75rem;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.diff-tool .btn-clear:hover {
  color: #dc2626;
  background: #fef2f2;
}

.diff-tool textarea {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  padding: 12px 14px;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  background: #fff;
  color: #292524;
  resize: vertical;
  min-height: 180px;
  max-height: 400px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  tab-size: 4;
}

.diff-tool textarea:focus {
  outline: none;
  border-color: #a8a29e;
  box-shadow: 0 0 0 3px rgba(168, 162, 158, 0.15);
}

.diff-tool textarea::placeholder {
  color: #a8a29e;
  font-style: italic;
}

/* Action Bar */
.diff-tool .action-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.diff-tool .btn-primary {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 9px 20px;
  border: none;
  border-radius: 8px;
  background: #292524;
  color: #faf8f5;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.diff-tool .btn-primary:hover {
  background: #44403c;
}

.diff-tool .btn-secondary {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 14px;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  background: #fffdf9;
  color: #57534e;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.diff-tool .btn-secondary:hover {
  border-color: #78716c;
  background: #f5f0e8;
  color: #44403c;
}

/* Word Wrap Toggle */
.diff-tool .wrap-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #57534e;
  cursor: pointer;
  padding: 0 10px;
  height: 34px;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  background: #fffdf9;
  transition: all 0.15s ease;
  user-select: none;
  margin: 0;
}

.diff-tool .wrap-toggle:hover {
  border-color: #78716c;
  background: #f5f0e8;
}

.diff-tool .wrap-toggle input {
  accent-color: #292524;
  cursor: pointer;
  margin: 0;
  width: 14px;
  height: 14px;
}

.diff-tool .view-options {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.diff-tool .view-toggle {
  display: flex;
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  overflow: hidden;
}

.diff-tool .view-btn {
  font-size: 0.82rem;
  padding: 0 12px;
  height: 30px;
  border: none;
  background: #fffdf9;
  color: #78716c;
  cursor: pointer;
  transition: all 0.15s ease;
}

.diff-tool .view-btn:first-child {
  border-right: 1px solid #e7e0d5;
}

.diff-tool .view-btn:hover {
  background: #f5f0e8;
  color: #44403c;
}

.diff-tool .view-btn.active {
  background: #292524;
  color: #fef3c7;
}

/* Diff Stats */
.diff-tool .diff-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  padding: 8px 14px;
  background: #f5f0e8;
  border-radius: 8px;
  border: 1px solid #e7e0d5;
}

.diff-tool .stat {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.diff-tool .stat i {
  font-size: 0.7rem;
}

.diff-tool .stat-added {
  color: #16a34a;
}

.diff-tool .stat-removed {
  color: #dc2626;
}

.diff-tool .stat-unchanged {
  color: #78716c;
}

/* Diff Output Container */
.diff-tool .diff-output {
  border: 2px solid #e7e0d5;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

/* Side-by-Side View */
.diff-tool .diff-side-by-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.diff-tool .diff-pane {
  overflow-x: auto;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  line-height: 1.55;
}

.diff-tool .diff-pane-left {
  border-right: 2px solid #e7e0d5;
}

/* Inline View */
.diff-tool .diff-inline {
  overflow-x: auto;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  line-height: 1.55;
}

/* Diff Lines */
.diff-tool .diff-line {
  display: flex;
  min-height: 1.55em;
  white-space: pre-wrap;
  word-break: break-all;
}

.diff-tool .diff-output.no-wrap .diff-line {
  white-space: pre;
  word-break: normal;
}

.diff-tool .diff-line-num {
  width: 40px;
  min-width: 40px;
  padding: 0 8px 0 0;
  text-align: right;
  color: #a8a29e;
  user-select: none;
  flex-shrink: 0;
  font-size: 0.72rem;
  line-height: 1.55;
  padding-top: 1px;
}

.diff-tool .diff-line-prefix {
  width: 18px;
  min-width: 18px;
  text-align: center;
  user-select: none;
  flex-shrink: 0;
  font-weight: 700;
}

.diff-tool .diff-line-content {
  flex: 1;
  min-width: 0;
  padding-right: 12px;
  overflow-x: visible;
}

/* Line types */
.diff-tool .diff-line.diff-added {
  background: #dcfce7;
}

.diff-tool .diff-line.diff-added .diff-line-num {
  background: #bbf7d0;
  color: #166534;
}

.diff-tool .diff-line.diff-added .diff-line-prefix {
  color: #16a34a;
}

.diff-tool .diff-line.diff-removed {
  background: #fee2e2;
}

.diff-tool .diff-line.diff-removed .diff-line-num {
  background: #fecaca;
  color: #991b1b;
}

.diff-tool .diff-line.diff-removed .diff-line-prefix {
  color: #dc2626;
}

.diff-tool .diff-line.diff-equal {
  background: #fff;
}

.diff-tool .diff-line.diff-empty {
  background: #f5f0e8;
}

.diff-tool .diff-line.diff-empty .diff-line-num {
  background: #f5f0e8;
}

/* Character-level highlights */
.diff-tool .char-added {
  background: #86efac;
  border-radius: 2px;
}

.diff-tool .char-removed {
  background: #fca5a5;
  border-radius: 2px;
}

/* Empty / Identical States */
.diff-tool .diff-empty-state,
.diff-tool .diff-identical {
  text-align: center;
  padding: 40px 20px;
  color: #78716c;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
}

.diff-tool .diff-empty-state i,
.diff-tool .diff-identical i {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 10px;
  color: #a8a29e;
}

.diff-tool .diff-identical i {
  color: #16a34a;
}

.diff-tool .diff-empty {
  text-align: center;
  padding: 30px 20px;
  color: #a8a29e;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
}

.diff-tool .diff-empty i {
  font-size: 1.3rem;
  display: block;
  margin-bottom: 8px;
  color: #d6cfc4;
}

/* Guide Section */
.diff-tool .syntax-guide-section {
  margin-bottom: 32px;
}

.diff-tool .syntax-guide-section > h3 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.diff-tool .syntax-guide-section > h3 i {
  color: #7c3aed;
}

.diff-tool .syntax-guide-content {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  overflow: hidden;
}

.diff-tool .guide-article {
  padding: 24px 28px;
  border-bottom: 1px solid #e7e0d5;
}

.diff-tool .guide-article:last-child {
  border-bottom: none;
}

.diff-tool .guide-article h2 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #292524;
  margin: 0 0 12px 0;
}

.diff-tool .guide-article p {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #57534e;
  line-height: 1.7;
  margin: 0 0 12px 0;
}

.diff-tool .guide-article p:last-child {
  margin-bottom: 0;
}

.diff-tool .guide-article code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.85rem;
}

.diff-tool .guide-article ul {
  list-style: none;
  margin: 10px 0;
  padding-left: 0;
}

.diff-tool .guide-article li {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #57534e;
  line-height: 1.7;
  padding: 8px 0 8px 20px;
  position: relative;
  border-bottom: 1px solid #f5f0e8;
}

.diff-tool .guide-article li:last-child {
  border-bottom: none;
}

.diff-tool .guide-article li::before {
  content: "•";
  color: #059669;
  font-weight: bold;
  position: absolute;
  left: 0;
}

.diff-tool .guide-article li strong {
  color: #292524;
}

/* FAQ Section */
.diff-tool .faq-section {
  margin-bottom: 32px;
  padding: 30px;
  background: #f5f0e8;
  border-radius: 16px;
  border: 2px solid #e7e0d5;
}

.diff-tool .faq-section > h2 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: #374151;
  margin: 0 0 24px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.diff-tool .faq-section > h2 i {
  color: #78716c;
}

.diff-tool .faq-item {
  background: #fffdf9;
  border: 2px solid #e7e0d5;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 12px;
}

.diff-tool .faq-item:last-child {
  margin-bottom: 0;
}

.diff-tool .faq-item h3 {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #292524;
  margin: 0 0 10px 0;
}

.diff-tool .faq-item p {
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
  color: #78716c;
  line-height: 1.6;
  margin: 0;
}

.diff-tool .faq-item code {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
  background: #292524;
  color: #fef3c7;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .diff-tool .tool-header {
    padding: 30px 20px;
    border-radius: 12px;
  }

  .diff-tool .tool-title {
    font-size: 1.5rem;
    flex-direction: column;
    gap: 8px;
  }

  .diff-tool .diff-main {
    padding: 16px 12px;
  }

  .diff-tool .input-panels {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .diff-tool textarea {
    min-height: 120px;
  }

  .diff-tool .action-bar {
    gap: 6px;
  }

  .diff-tool .btn-primary {
    padding: 8px 14px;
    font-size: 0.82rem;
  }

  .diff-tool .btn-secondary {
    padding: 7px 10px;
    font-size: 0.78rem;
  }

  .diff-tool .diff-side-by-side {
    grid-template-columns: 1fr;
  }

  .diff-tool .diff-pane-left {
    border-right: none;
    border-bottom: 2px solid #e7e0d5;
  }

  .diff-tool .diff-stats {
    gap: 10px;
    flex-wrap: wrap;
  }

  .diff-tool .view-toggle {
    margin-left: 0;
  }

  .diff-tool .faq-section {
    padding: 20px;
  }

  .diff-tool .guide-article {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  .diff-tool .diff-line-num {
    width: 30px;
    min-width: 30px;
    font-size: 0.65rem;
    padding: 0 4px 0 0;
  }

  .diff-tool .diff-line-prefix {
    width: 14px;
    min-width: 14px;
  }

  .diff-tool .btn-secondary span.btn-label {
    display: none;
  }
}