@import url('../../src/styles/_converter.css');
@import url('../../src/styles/_buttons.css');
@import url('../../src/styles/_options.css');
@import url('../../src/styles/_progress.css');

/* ─── How It Works Steps Section ─────────────────────────── */

.how-it-works-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1.5rem 1rem;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.step-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem 1.75rem;
  text-align: center;
  transition: all 0.3s ease;
  overflow: hidden;
}

.step-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px -8px rgba(99,102,241,0.12), 0 4px 8px -4px rgba(0,0,0,0.06);
  border-color: transparent;
}

.step-card:hover::after {
  opacity: 1;
}

.step-number {
  position: absolute;
  top: 0.75rem;
  right: 0.85rem;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.08;
  line-height: 1;
}

.step-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.step-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.drop-zone.drag-over {
  border-color: var(--primary);
  background: rgba(99,102,241,0.04);
  transform: scale(1.01);
}

/* ─── File Info Preview Card ─────────────────────────── */

.file-preview-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.3s ease-out;
}

.file-preview-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 10px;
  color: var(--primary);
}

.file-preview-details {
  flex: 1;
  min-width: 0;
}

.file-preview-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.file-preview-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin: 0.2rem 0 0;
}

.file-preview-change {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.file-preview-change:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

/* ─── Markdown Preview Panel ─────────────────────────── */

.md-preview {
  margin-top: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  animation: fadeInUp 0.4s ease-out;
}

.md-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.md-preview-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.md-preview-title svg {
  color: var(--primary);
}

.md-preview-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-copy,
.btn-toggle-view {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.btn-copy:hover,
.btn-toggle-view:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(99, 102, 241, 0.04);
}

.btn-copy.copied {
  border-color: var(--success, #00b894);
  color: var(--success, #00b894);
  background: rgba(0, 184, 148, 0.06);
}

.md-preview-body {
  max-height: 420px;
  overflow-y: auto;
  background: var(--bg, #fafbfc);
}

.md-preview-raw {
  margin: 0;
  padding: 1.25rem;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'JetBrains Mono', Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-wrap: break-word;
  tab-size: 2;
  background: transparent;
  overflow-x: auto;
}

.md-preview-rendered {
  padding: 1.25rem;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text);
}

.md-preview-rendered h1,
.md-preview-rendered h2,
.md-preview-rendered h3,
.md-preview-rendered h4,
.md-preview-rendered h5,
.md-preview-rendered h6 {
  margin: 1.25rem 0 0.5rem;
  font-weight: 700;
  line-height: 1.3;
}

.md-preview-rendered h1 { font-size: 1.5rem; border-bottom: 2px solid var(--border); padding-bottom: 0.4rem; }
.md-preview-rendered h2 { font-size: 1.3rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.md-preview-rendered h3 { font-size: 1.15rem; }
.md-preview-rendered h4 { font-size: 1.05rem; }

.md-preview-rendered h1:first-child,
.md-preview-rendered h2:first-child,
.md-preview-rendered h3:first-child {
  margin-top: 0;
}

.md-preview-rendered p {
  margin: 0.6rem 0;
}

.md-preview-rendered ul,
.md-preview-rendered ol {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
}

.md-preview-rendered li {
  margin: 0.25rem 0;
}

.md-preview-rendered hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.25rem 0;
}

.md-preview-rendered code {
  background: rgba(99, 102, 241, 0.08);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
}

.md-preview-rendered a {
  color: var(--primary);
  text-decoration: underline;
}

.md-preview-rendered strong {
  font-weight: 700;
}

.md-preview-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--card);
  border-top: 1px solid var(--border);
}

.md-preview-stats {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ─── Animations ──────────────────────────────────────── */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Responsive ──────────────────────────────────────── */

@media (max-width: 640px) {
  .file-preview-card {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .file-preview-details {
    flex: 1 1 calc(100% - 60px);
  }

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

  .md-preview-header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }

  .md-preview-actions {
    width: 100%;
  }

  .btn-copy,
  .btn-toggle-view {
    flex: 1;
    justify-content: center;
  }

  .md-preview-body {
    max-height: 320px;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .step-card {
    padding: 1.5rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }

  .how-it-works-section {
    padding: 2rem 1rem 0.5rem;
  }
}