/* ==========================================================================
   Audio Converter Specific Styling
   Reverse-Engineered to match Submind & AllToolsNow design tokens
   Scoped under .converter-app
   ========================================================================== */

.converter-app {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem 3.5rem 1rem;
}

/* ==========================================================================
   1. Hero Header Section
   ========================================================================== */
.converter-hero {
  text-align: center;
  margin-bottom: 2.25rem;
  padding-top: 1.5rem;
}

.converter-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--accent-light, #EDE9FE);
  color: var(--accent, #7C3AED);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 0.38rem 0.95rem;
  border-radius: var(--radius-pill, 9999px);
  margin-bottom: 1.15rem;
  letter-spacing: 0.02em;
}

.converter-hero h1 {
  font-size: clamp(2rem, 4.2vw, 2.75rem);
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
}

.converter-hero p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary, #475569);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ==========================================================================
   2. Main Tool Workbench Card
   ========================================================================== */
.converter-card {
  background: var(--bg-surface, #FFFFFF);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: var(--radius-2xl, 24px);
  box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06);
  padding: 2.25rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
}

/* Error Banner Alert */
.alert-box {
  display: none;
  background-color: var(--danger-light, #FEE2E2);
  border: 1px solid var(--danger, #EF4444);
  color: var(--danger-text, #991B1B);
  padding: 1rem 1.25rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  align-items: center;
  gap: 0.75rem;
}

.alert-text {
  flex: 1;
  font-weight: 500;
}

.alert-close {
  background: none;
  border: none;
  color: var(--danger-text, #991B1B);
  font-size: 1.5rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
  padding: 0 0.25rem;
}

/* ==========================================================================
   3. Drag & Drop Intake Zone (Submind Parity)
   ========================================================================== */
.converter-dropzone {
  border: 2px dashed #93C5FD;
  background-color: #F8FAFC;
  border-radius: 20px;
  padding: 3.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.converter-dropzone:hover,
.converter-dropzone.dragover {
  border-color: var(--accent, #7C3AED);
  background-color: #FAF5FF;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -4px rgba(124, 58, 237, 0.1);
}

.converter-dropzone-icon {
  font-size: 3rem;
  margin-bottom: 0.85rem;
  transition: transform 0.2s ease;
}

.converter-dropzone:hover .converter-dropzone-icon {
  transform: scale(1.1);
}

.converter-dropzone-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  margin-bottom: 0.35rem;
}

.converter-dropzone-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary, #475569);
  margin-bottom: 1rem;
}

.converter-formats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.converter-format-tag {
  background: var(--accent-light, #EDE9FE);
  color: var(--accent, #7C3AED);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill, 9999px);
  letter-spacing: 0.04em;
}

.converter-privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #FFFFFF;
  border: 1px solid var(--border, #E2E8F0);
  color: var(--text-muted, #64748B);
  font-size: 0.8125rem;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-pill, 9999px);
}

.converter-file-input {
  display: none;
}

/* ==========================================================================
   4. File Loaded Workspace State
   ========================================================================== */
.converter-file-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: var(--radius-lg, 16px);
  margin-bottom: 1.75rem;
}

.converter-file-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.converter-file-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-light, #EDE9FE);
  color: var(--accent, #7C3AED);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.converter-file-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary, #0F172A);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 380px;
}

.converter-file-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.35rem;
}

.meta-pill {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: var(--text-secondary, #475569);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-pill, 9999px);
}

.btn-change-file {
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  color: var(--text-primary, #0F172A);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.btn-change-file:hover {
  border-color: var(--accent, #7C3AED);
  color: var(--accent, #7C3AED);
  background: #FAF5FF;
}

/* Audio Player Container */
.converter-player-wrap {
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: var(--radius-lg, 16px);
  padding: 1.15rem 1.35rem;
  margin-bottom: 2rem;
}

.converter-player-header {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-muted, #64748B);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.converter-audio-player {
  width: 100%;
  height: 42px;
  outline: none;
}

/* Section Subhead */
.converter-section-label {
  font-size: 0.8125rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   5. Output Format Cards Grid
   ========================================================================== */
.format-selection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.format-card {
  border: 2px solid var(--border, #E2E8F0);
  border-radius: var(--radius-lg, 18px);
  padding: 1.35rem 1.45rem;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: #FFFFFF;
  position: relative;
}

.format-card:hover {
  border-color: var(--accent, #7C3AED);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -4px rgba(124, 58, 237, 0.1);
}

.format-card.selected {
  border-color: var(--accent, #7C3AED);
  background: linear-gradient(180deg, #FAF5FF 0%, #FFFFFF 100%);
  box-shadow: 0 0 0 1px var(--accent, #7C3AED), 0 10px 25px -4px rgba(124, 58, 237, 0.15);
}

.format-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.6875rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: var(--radius-pill, 9999px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-rec {
  background: var(--accent-light, #EDE9FE);
  color: var(--accent, #7C3AED);
}

.badge-lossless {
  background: #D1FAE5;
  color: #065F46;
}

.format-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  margin-bottom: 0.35rem;
}

.format-desc {
  font-size: 0.825rem;
  color: var(--text-muted, #64748B);
  line-height: 1.45;
}

/* ==========================================================================
   6. Pro Audio Settings Drawer
   ========================================================================== */
.converter-settings-box {
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: var(--radius-lg, 18px);
  padding: 1.5rem 1.65rem;
  margin-bottom: 2rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.setting-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary, #0F172A);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.setting-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary, #0F172A);
  background: #FFFFFF;
  border: 1.5px solid #CBD5E1;
  border-radius: 12px;
  cursor: pointer;
  outline: none;
  transition: all 0.15s ease;
}

.setting-select:focus {
  border-color: var(--accent, #7C3AED);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.setting-helper {
  font-size: 0.75rem;
  color: var(--text-muted, #64748B);
  line-height: 1.4;
}

/* ==========================================================================
   7. Primary Action CTA Button
   ========================================================================== */
.btn-convert-execute {
  width: 100%;
  background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
  color: #FFFFFF;
  font-size: 1.125rem;
  font-weight: 700;
  padding: 1.15rem 2rem;
  border: none;
  border-radius: var(--radius-pill, 9999px);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  box-shadow: 0 8px 24px -4px rgba(124, 58, 237, 0.4);
  min-height: 56px;
}

.btn-convert-execute:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -4px rgba(124, 58, 237, 0.5);
}

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

.converter-footer-note {
  margin-top: 0.85rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted, #64748B);
  font-weight: 500;
}

/* ==========================================================================
   8. Progress & Loading Indicator
   ========================================================================== */
.converter-progress-box {
  display: none;
  text-align: center;
  padding: 3.5rem 1.5rem;
}

.converter-spinner {
  width: 52px;
  height: 52px;
  border: 4px solid var(--border, #E2E8F0);
  border-top-color: var(--accent, #7C3AED);
  border-radius: 50%;
  animation: converterSpin 0.8s linear infinite;
  margin: 0 auto 1.5rem auto;
}

@keyframes converterSpin {
  to { transform: rotate(360deg); }
}

.converter-progress-track {
  width: 100%;
  max-width: 440px;
  height: 8px;
  background: var(--bg-surface-secondary, #F1F5F9);
  border-radius: 9999px;
  overflow: hidden;
  margin: 1.25rem auto;
}

.converter-progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #7C3AED, #9333EA);
  border-radius: 9999px;
  transition: width 0.2s ease;
}

.converter-progress-stage {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary, #475569);
}

/* ==========================================================================
   9. Results & Download Screen
   ========================================================================== */
.converter-results-view {
  display: none;
}

.converter-success-banner {
  text-align: center;
  margin-bottom: 2rem;
}

.success-check-bubble {
  width: 64px;
  height: 64px;
  background: #D1FAE5;
  color: #059669;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem auto;
}

.converter-success-banner h2 {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
  margin-bottom: 0.35rem;
}

.converter-success-banner p {
  font-size: 0.95rem;
  color: var(--text-secondary, #475569);
}

/* Metrics Comparison Grid */
.conversion-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 14px;
  padding: 1.15rem 1rem;
  text-align: center;
}

.metric-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted, #64748B);
  margin-bottom: 0.35rem;
}

.metric-value {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary, #0F172A);
}

.metric-value.accent {
  color: var(--accent, #7C3AED);
}

.metric-value.success {
  color: #059669;
}

/* Primary Download Button */
.btn-download-primary {
  width: 100%;
  background: #0F172A;
  color: #FFFFFF;
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 700;
  padding: 1.15rem 2rem;
  border-radius: var(--radius-pill, 9999px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  transition: all 0.2s ease;
  min-height: 56px;
  margin-bottom: 1.25rem;
}

.btn-download-primary:hover {
  background: #1E293B;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.2);
}

.converter-reset-bar {
  text-align: center;
}

.btn-reset-converter {
  background: transparent;
  border: none;
  color: var(--text-muted, #64748B);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: color 0.15s ease;
  padding: 0.5rem 1rem;
}

.btn-reset-converter:hover {
  color: var(--accent, #7C3AED);
}

/* ==========================================================================
   10. Educational Flow & Feature Cards
   ========================================================================== */
.steps-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0 1rem 0;
}

.step-card {
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 16px;
  padding: 1.5rem;
  position: relative;
  transition: all 0.2s ease;
}

.step-card:hover {
  border-color: var(--accent, #7C3AED);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(124, 58, 237, 0.06);
}

.step-badge-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent, #7C3AED);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.9375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.step-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary, #0F172A);
  margin-bottom: 0.5rem;
}

.step-body {
  font-size: 0.9rem;
  color: var(--text-secondary, #475569);
  line-height: 1.55;
}

/* Feature 3-Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.feature-icon-bubble {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-light, #EDE9FE);
  color: var(--accent, #7C3AED);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary, #0F172A);
  margin-bottom: 0.5rem;
}

.feature-text {
  font-size: 0.875rem;
  color: var(--text-secondary, #475569);
  line-height: 1.6;
}

/* Related Tools Grid */
.tool-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.tool-link-card {
  display: block;
  padding: 1.25rem;
  background: var(--bg-surface-secondary, #F8FAFC);
  border: 1px solid var(--border, #E2E8F0);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.tool-link-card:hover {
  border-color: var(--accent, #7C3AED);
  background: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(124, 58, 237, 0.08);
}

.tool-link-title {
  font-weight: 700;
  color: var(--accent, #7C3AED);
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.tool-link-desc {
  font-size: 0.825rem;
  color: var(--text-secondary, #475569);
  line-height: 1.4;
}

/* ==========================================================================
   11. Mobile & Touch Accessibility
   ========================================================================== */
@media (max-width: 768px) {
  .converter-card {
    padding: 1.35rem;
    border-radius: 18px;
  }

  .converter-dropzone {
    padding: 2.5rem 1rem;
  }

  .converter-file-summary {
    flex-direction: column;
    align-items: stretch;
  }

  .converter-file-meta {
    width: 100%;
  }

  .converter-file-title {
    max-width: 100%;
  }

  .btn-change-file {
    width: 100%;
    justify-content: center;
  }

  .format-selection-grid {
    grid-template-columns: 1fr;
  }

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

  .conversion-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .btn-convert-execute,
  .btn-download-primary {
    min-height: 52px;
  }
}