/* ============================================
   Tool Page Styles
   ============================================ */

/* ---------- Tool Header ---------- */
.tool-header {
  padding: var(--space-10) 0 var(--space-6);
  text-align: center;
  position: relative;
}

.tool-header .tool-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  margin: 0 auto var(--space-4);
  box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.08);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.tool-header .tool-card-icon:hover {
  transform: translateY(-2px) scale(1.04);
}

.tool-header .tool-card-icon svg {
  width: 28px;
  height: 28px;
}

.tool-header h1 {
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.tool-description {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Tool Interface ---------- */
.tool-interface {
  padding: var(--space-4) 0 var(--space-10);
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  padding: var(--space-8);
  box-shadow: 0 8px 30px -4px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.02);
  transition: var(--transition-theme), box-shadow 0.25s ease;
  position: relative;
}

[data-theme="dark"] .tool-card {
  background: #151D2F;
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 12px 36px -6px rgba(0, 0, 0, 0.55), 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* ---------- File Upload Area ---------- */
.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  background: var(--bg-secondary);
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: 0 8px 24px -4px rgba(79, 70, 229, 0.12);
}

.upload-area-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--text-tertiary);
}

.upload-area h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--space-2);
}

.upload-area p {
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
}

.upload-area .btn {
  margin-top: var(--space-4);
}

.upload-area input[type="file"] {
  display: none;
}

/* ---------- Image Preview ---------- */
.preview-container {
  margin-top: var(--space-6);
  display: none;
}

.preview-container.active {
  display: block;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.preview-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.preview-box h4 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
}

.preview-box img,
.preview-box canvas {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: repeating-conic-gradient(#f0f0f0 0% 25%, #ffffff 0% 50%) 50% / 16px 16px;
}

[data-theme="dark"] .preview-box img,
[data-theme="dark"] .preview-box canvas {
  background: repeating-conic-gradient(#2a2a2a 0% 25%, #1a1a1a 0% 50%) 50% / 16px 16px;
}

.preview-single {
  grid-template-columns: 1fr;
}

.preview-single .preview-box img,
.preview-single .preview-box canvas {
  max-height: 400px;
}

/* ---------- Tool Controls ---------- */
.tool-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: flex-end;
  margin-top: var(--space-6);
  padding: var(--space-6);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.control-group {
  flex: 1;
  min-width: 150px;
}

.control-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.control-group input,
.control-group select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--fs-sm);
}

.control-group input:focus,
.control-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.control-inline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Range with value display */
.range-with-value {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.range-with-value input[type="range"] {
  flex-grow: 1;
}

.range-value {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--primary);
  min-width: 48px;
  text-align: center;
  padding: var(--space-1) var(--space-2);
  background: var(--primary-light);
  border-radius: var(--radius-md);
}

/* Aspect ratio lock */
.aspect-lock {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-2) 0;
}

.aspect-lock input {
  accent-color: var(--primary);
}

/* ---------- Result Section ---------- */
.result-section {
  margin-top: var(--space-6);
  padding: var(--space-6);
  background: var(--success-bg);
  border: 1px solid var(--success);
  border-radius: var(--radius-lg);
  display: none;
}

.result-section.active {
  display: block;
}

.result-section.error {
  background: var(--error-bg);
  border-color: var(--error);
}

.result-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-bottom: var(--space-4);
}

.result-stat {
  text-align: center;
}

.result-stat-value {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
}

.result-stat-label {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

.result-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}

/* ---------- Calculator Styles ---------- */
.calculator-container {
  max-width: 500px;
  margin: 0 auto;
}

.calc-display {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  text-align: right;
  overflow: hidden;
}

.calc-expression {
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
  min-height: 20px;
  word-break: break-all;
}

.calc-result {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-top: var(--space-2);
  word-break: break-all;
}

.calc-keypad {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.calc-btn {
  padding: var(--space-4);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calc-btn:hover {
  background: var(--bg-secondary);
}

.calc-btn:active {
  transform: scale(0.95);
}

.calc-btn.operator {
  background: var(--primary-light);
  color: var(--primary);
  border-color: transparent;
}

.calc-btn.operator:hover {
  background: var(--primary);
  color: var(--text-inverse);
}

.calc-btn.equals {
  background: var(--primary);
  color: var(--text-inverse);
  border-color: transparent;
}

.calc-btn.equals:hover {
  background: var(--primary-hover);
}

.calc-btn.clear {
  background: var(--error-bg);
  color: var(--error);
  border-color: transparent;
}

.calc-btn.clear:hover {
  background: var(--error);
  color: var(--text-inverse);
}

.calc-btn.wide {
  grid-column: span 2;
}

.calc-btn.fn {
  font-size: var(--fs-sm);
  background: var(--bg-tertiary);
}

/* Scientific Calculator Extended */
.sci-calc-keypad {
  grid-template-columns: repeat(5, 1fr);
}

/* Calculator Input Form Style */
.calc-form {
  display: grid;
  gap: var(--space-5);
}

.calc-form .form-group {
  margin-bottom: 0;
}

.calc-result-card {
  background: var(--primary-light);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-6);
  text-align: center;
}

.calc-result-card h3 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.calc-result-card .result-value {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  color: var(--primary);
}

.calc-result-card .result-detail {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-top: var(--space-2);
}

.calc-result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.calc-result-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
}

.calc-result-item h4 {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.calc-result-item .value {
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
}

/* ---------- Text Tool Styles ---------- */
.text-tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.text-tool-input textarea,
.text-tool-output textarea {
  width: 100%;
  min-height: 250px;
  padding: var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  resize: vertical;
}

.text-tool-input textarea:focus,
.text-tool-output textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.text-tool-output textarea {
  background: var(--bg-secondary);
}

.text-tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.text-tool-header h3 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.text-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-top: var(--space-4);
}

.text-stat {
  text-align: center;
}

.text-stat-value {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--primary);
}

.text-stat-label {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* Copy Button */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--fs-xs);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.copy-btn.copied {
  background: var(--success-bg);
  border-color: var(--success);
  color: var(--success);
}

/* Case converter buttons */
.case-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0;
}

/* ---------- JSON / Code Output ---------- */
.code-output {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
  max-height: 500px;
  overflow-y: auto;
}

/* JSON Syntax Highlighting */
.json-key { color: #D73A49; }
.json-string { color: #032F62; }
.json-number { color: #005CC5; }
.json-boolean { color: #E36209; }
.json-null { color: #6F42C1; }

[data-theme="dark"] .json-key { color: #F97583; }
[data-theme="dark"] .json-string { color: #9ECBFF; }
[data-theme="dark"] .json-number { color: #79B8FF; }
[data-theme="dark"] .json-boolean { color: #FFAB70; }
[data-theme="dark"] .json-null { color: #B392F0; }

/* ---------- Password Strength Meter ---------- */
.strength-meter {
  margin-top: var(--space-3);
}

.strength-bar {
  height: 6px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-base), background-color var(--transition-base);
}

.strength-fill.weak { width: 25%; background: var(--error); }
.strength-fill.fair { width: 50%; background: var(--warning); }
.strength-fill.good { width: 75%; background: var(--info); }
.strength-fill.strong { width: 100%; background: var(--success); }

.strength-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  margin-top: var(--space-1);
}

/* ---------- Color Converter ---------- */
.color-preview {
  width: 100%;
  height: 120px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  margin-bottom: var(--space-4);
}

.color-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.color-value-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.color-value-group input {
  flex-grow: 1;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}

/* ---------- QR / Barcode Output ---------- */
.qr-output,
.barcode-output {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-8);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-top: var(--space-6);
}

.qr-output canvas,
.qr-output img,
.barcode-output svg,
.barcode-output canvas {
  max-width: 100%;
  background: white;
  padding: var(--space-4);
  border-radius: var(--radius-md);
}

/* ---------- PDF Tool Styles ---------- */
.pdf-file-list {
  margin-top: var(--space-4);
}

.pdf-file-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
}

.pdf-file-item .file-icon {
  font-size: var(--fs-xl);
  color: var(--cat-pdf);
}

.pdf-file-item .file-info {
  flex-grow: 1;
}

.pdf-file-item .file-name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
}

.pdf-file-item .file-size {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

.pdf-file-item .file-remove {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
}

.pdf-file-item .file-remove:hover {
  color: var(--error);
  background: var(--error-bg);
}

/* Page range input */
.page-range-input {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-wrap: wrap;
}

.page-range-input input {
  width: 80px;
}

/* ---------- Unit Converter ---------- */
.converter-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-4);
  align-items: end;
}

.converter-swap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  background: var(--bg-card);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-3);
}

.converter-swap:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* ---------- Image Crop Area ---------- */
.crop-container {
  position: relative;
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  background: repeating-conic-gradient(#f0f0f0 0% 25%, #ffffff 0% 50%) 50% / 16px 16px;
  border-radius: var(--radius-lg);
}

[data-theme="dark"] .crop-container {
  background: repeating-conic-gradient(#2a2a2a 0% 25%, #1a1a1a 0% 50%) 50% / 16px 16px;
}

.crop-container img {
  display: block;
  max-width: 100%;
}

.crop-overlay {
  position: absolute;
  border: 2px dashed var(--primary);
  background: rgba(79, 70, 229, 0.1);
  cursor: move;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
}

.crop-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
}

.crop-handle.nw { top: -6px; left: -6px; cursor: nw-resize; }
.crop-handle.ne { top: -6px; right: -6px; cursor: ne-resize; }
.crop-handle.sw { bottom: -6px; left: -6px; cursor: sw-resize; }
.crop-handle.se { bottom: -6px; right: -6px; cursor: se-resize; }

/* ---------- Tool How-To Section ---------- */
.tool-howto {
  padding: var(--space-12) 0;
  background: var(--bg-secondary);
}

.howto-steps {
  max-width: 600px;
  margin: var(--space-6) auto 0;
  counter-reset: howto-step;
}

.howto-steps li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  font-size: var(--fs-base);
  counter-increment: howto-step;
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

.howto-steps code {
  word-break: break-all;
  overflow-wrap: break-word;
}

.howto-steps li::before {
  content: counter(howto-step);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Tool Features Section ---------- */
.tool-features {
  padding: var(--space-12) 0;
}

/* ---------- Tool FAQ Section ---------- */
.tool-faq {
  padding: var(--space-10) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}

.tool-faq h2 {
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
  text-align: center;
  color: var(--text-primary);
}

.tool-faq .faq-accordion {
  max-width: 800px;
  margin: 0 auto;
}

/* ---------- Related Tools Section ---------- */
.related-tools {
  padding: var(--space-8) 0;
}

.related-tools h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: var(--space-6);
  text-align: center;
}

.related-tools .tools-grid {
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

/* ---------- Tool Page Responsive ---------- */
@media (max-width: 767px) {
  .tool-card {
    padding: var(--space-5);
  }

  .preview-grid {
    grid-template-columns: 1fr;
  }

  .tool-controls {
    flex-direction: column;
  }

  .control-group {
    min-width: 100%;
  }

  .text-tool-layout {
    grid-template-columns: 1fr;
  }

  .calc-keypad {
    gap: var(--space-1);
  }

  .calc-btn {
    padding: var(--space-3);
    font-size: var(--fs-base);
    min-height: 48px;
  }

  .converter-layout {
    grid-template-columns: 1fr;
  }

  .converter-swap {
    margin: 0 auto;
    transform: rotate(90deg);
  }

  .color-values {
    grid-template-columns: 1fr;
  }

  .calc-result-grid {
    grid-template-columns: 1fr 1fr;
  }

  .result-stats {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .sci-calc-keypad {
    grid-template-columns: repeat(4, 1fr);
  }

  .calc-result-grid {
    grid-template-columns: 1fr;
  }

  .text-stats {
    flex-direction: column;
    align-items: center;
  }
}

/* ===================================================
   Enhanced Tool UI Components (Matching Reference Design)
   =================================================== */

/* Segmented Tabs Control (QR, converters, options) */
.segmented-control {
  display: flex;
  background: var(--bg-secondary);
  padding: 4px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  gap: 4px;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  max-width: 100%;
  box-sizing: border-box;
}

.segmented-btn {
  flex: 1 1 auto;
  min-width: 70px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-align: center;
  box-sizing: border-box;
}

.segmented-btn:hover {
  color: var(--text-primary);
}

@media (max-width: 480px) {
  .segmented-btn {
    min-width: calc(33.333% - 4px);
    padding: 6px 8px;
    font-size: 12px;
  }
}

@media (max-width: 360px) {
  .segmented-btn {
    min-width: calc(50% - 4px);
  }
}

.segmented-btn.active {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
}

/* Age Calculator Banner & Sub-Stats */
.age-banner {
  background: linear-gradient(135deg, var(--primary-light), var(--bg-card));
  border: 2px solid var(--primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  margin: var(--space-6) 0;
  box-shadow: var(--shadow-sm);
}

.age-banner-label {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
  font-weight: var(--fw-semibold);
}

.age-banner-value {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  color: var(--primary);
}

.age-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.age-stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.age-stat-val {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
}

.age-stat-lbl {
  font-size: var(--fs-xs);
  color: var(--text-secondary);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Currency Select Dropdown */
.currency-select {
  font-weight: var(--fw-semibold);
  color: var(--primary);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
}

/* Amortization Table */
.table-container {
  width: 100%;
  overflow-x: auto;
  margin-top: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  max-height: 420px;
  overflow-y: auto;
}

.amortization-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: var(--fs-sm);
}

.amortization-table th {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-3) var(--space-4);
  font-weight: var(--fw-semibold);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.amortization-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  white-space: nowrap;
}

.amortization-table tr:hover td {
  background: var(--bg-secondary);
}

/* Enhanced Upload Dropzone */
.upload-area {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
  border: 2px dashed #818CF8;
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-8);
  transition: all var(--transition-base);
}

.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
}

.upload-cloud-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-4);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Badge for Savings */
.badge-saved {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
}

.badge-increased {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid var(--warning);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
}

.badge-neutral {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
}

/* ===================================================
   Full Dark Mode Adaptation for All Tool Internals
   =================================================== */
[data-theme="dark"] .tool-card {
  background: #151D2F;
  border-color: #243049;
}

[data-theme="dark"] .upload-area {
  background: linear-gradient(180deg, #101625 0%, #151D2F 100%);
  border-color: #3B4B70;
}

[data-theme="dark"] .upload-area:hover,
[data-theme="dark"] .upload-area.dragover {
  background: rgba(79, 70, 229, 0.15);
  border-color: #6366F1;
}

[data-theme="dark"] .segmented-control {
  background: #0B0F19;
  border-color: #243049;
}

[data-theme="dark"] .segmented-btn {
  color: #94A3B8;
}

[data-theme="dark"] .segmented-btn.active {
  background: #4F46E5;
  color: #FFFFFF;
}

[data-theme="dark"] .age-banner {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.2), #151D2F);
  border-color: #6366F1;
}

[data-theme="dark"] .age-stat-card {
  background: #0F172A;
  border-color: #243049;
}

[data-theme="dark"] .table-container {
  border-color: #243049;
}

[data-theme="dark"] .amortization-table th {
  background: #0F172A;
  border-color: #243049;
  color: #F1F5F9;
}

[data-theme="dark"] .amortization-table td {
  border-color: #1E293B;
  color: #94A3B8;
}

[data-theme="dark"] .amortization-table tr:hover td {
  background: #192338;
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea,
[data-theme="dark"] .currency-select,
[data-theme="dark"] .control-group input,
[data-theme="dark"] .control-group select {
  background: #0B0F19;
  border-color: #2E3C5A;
  color: #F1F5F9;
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus,
[data-theme="dark"] .currency-select:focus,
[data-theme="dark"] .control-group input:focus,
[data-theme="dark"] .control-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
  background: #0D1322;
}

[data-theme="dark"] .upload-area {
  background: #101626;
  border-color: #2E3C5A;
}

[data-theme="dark"] .upload-area:hover,
[data-theme="dark"] .upload-area.dragover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

[data-theme="dark"] .calc-display {
  background: #0B0F19;
  border-color: #243049;
}

[data-theme="dark"] .calc-btn {
  background: #1B2438;
  border-color: #2E3C5A;
  color: #F1F5F9;
}

[data-theme="dark"] .calc-btn:hover {
  background: #243049;
}

[data-theme="dark"] .calc-btn.fn {
  background: #0F172A;
  color: #818CF8;
}

[data-theme="dark"] .calc-result-card {
  background: rgba(79, 70, 229, 0.15);
  border-color: #6366F1;
}

[data-theme="dark"] .calc-result-item {
  background: #0F172A;
  border-color: #243049;
}

[data-theme="dark"] .preview-box {
  background: #0F172A;
  border-color: #243049;
}

[data-theme="dark"] .tool-controls {
  background: #0F172A;
  border-color: #243049;
}

[data-theme="dark"] .text-stats {
  background: #0F172A;
  border-color: #243049;
}

[data-theme="dark"] .text-tool-input textarea,
[data-theme="dark"] .text-tool-output textarea {
  background: #0B0F19;
  border-color: #2E3C5A;
  color: #F1F5F9;
}

[data-theme="dark"] .code-output {
  background: #0B0F19;
  border-color: #243049;
}

[data-theme="dark"] .qr-output,
[data-theme="dark"] .barcode-output {
  background: #0F172A;
  border-color: #243049;
}

/* ===================================================
   Universal Action & Button Group Constraints
   =================================================== */

.btn-group,
.calc-actions,
.result-actions,
.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  max-width: 100%;
  box-sizing: border-box;
}

.calc-form div[style*="display: flex"]:not(:has(.tn-cal-preset-pill)),
.calc-form div[style*="display:flex"]:not(:has(.tn-cal-preset-pill)) {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  max-width: 100%;
  box-sizing: border-box;
}

.btn-group .btn,
.calc-actions .btn,
.result-actions .btn,
.tool-actions .btn,
.calc-form .btn {
  max-width: 100%;
  box-sizing: border-box;
}

/* Ensure reset buttons stay strictly inside container */
.btn-secondary,
button[id*="reset" i],
button[id*="Reset" i],
button[id*="clear" i] {
  max-width: 100%;
  box-sizing: border-box;
}

.tn-cal-preset-pill {
  flex: 0 0 auto !important;
  max-width: 100% !important;
  box-sizing: border-box !important;
}

/* Dynamic Rows Responsive Helper */
.course-row,
.item-row {
  max-width: 100%;
  box-sizing: border-box;
}

@media (max-width: 600px) {
  .course-row,
  .item-row {
    flex-wrap: wrap !important;
    gap: 0.5rem !important;
  }

  .course-row input.c-name,
  .item-row input.i-name {
    flex: 1 1 100% !important;
    width: 100% !important;
  }

  .course-row select.c-grade,
  .course-row input.c-credits,
  .item-row input.i-grade,
  .item-row input.i-weight {
    flex: 1 1 calc(50% - 0.25rem) !important;
    min-width: 0 !important;
  }

  /* Universal Mobile Stack for Action Buttons */
  .btn-group,
  .calc-actions,
  .result-actions,
  .tool-actions,
  .calc-form > div[style*="display: flex"]:not(:has(.tn-cal-preset-pill)),
  .calc-form > div[style*="display:flex"]:not(:has(.tn-cal-preset-pill)) {
    display: flex !important;
    flex-direction: column !important;
    flex-wrap: nowrap !important;
    width: 100% !important;
    box-sizing: border-box !important;
    gap: var(--space-3) !important;
    align-items: stretch !important;
  }

  .btn-group > .btn,
  .btn-group > button,
  .calc-actions > .btn,
  .calc-actions > button,
  .result-actions > .btn,
  .result-actions > button,
  .tool-actions > .btn,
  .tool-actions > button,
  .calc-form > div[style*="display: flex"]:not(:has(.tn-cal-preset-pill)) > .btn,
  .calc-form > div[style*="display: flex"]:not(:has(.tn-cal-preset-pill)) > button,
  .calc-form > div[style*="display:flex"]:not(:has(.tn-cal-preset-pill)) > .btn,
  .calc-form > div[style*="display:flex"]:not(:has(.tn-cal-preset-pill)) > button {
    display: flex !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    flex: 0 0 auto !important;
    box-sizing: border-box !important;
    justify-content: center !important;
    text-align: center !important;
    margin: 0 !important;
  }
}