:root {
  --bg: #f1f5f9;
  --card-bg: #fff;
  --text: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --accent: #3b82f6;
  --accent-bg: #eff6ff;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --success-text: #16a34a;
  --error-bg: #fef2f2;
  --error-border: #fecaca;
  --error-text: #dc2626;
  --tab-bg: #f1f5f9;
  --tab-active: #fff;
  --hover-bg: #f8fafc;
  --upload-icon: #64748b;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --btn-bg: #0f172a;
  --btn-hover: #1e293b;
  --download-bg: #22c55e;
  --download-hover: #16a34a;
  --file-icon: #3b82f6;
  --code-bg: #f8fafc;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --card-bg: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  --border: #334155;
  --accent: #60a5fa;
  --accent-bg: #1e3a5f;
  --success-bg: #052e16;
  --success-border: #166534;
  --success-text: #4ade80;
  --error-bg: #450a0a;
  --error-border: #7f1d1d;
  --error-text: #f87171;
  --tab-bg: #1e293b;
  --tab-active: #334155;
  --hover-bg: #1e293b;
  --upload-icon: #94a3b8;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --btn-bg: #3b82f6;
  --btn-hover: #60a5fa;
  --download-bg: #16a34a;
  --download-hover: #22c55e;
  --file-icon: #60a5fa;
  --code-bg: #0f172a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  min-height: 100vh;
  direction: rtl;
  color: var(--text);
  transition: background 0.2s, color 0.2s;
}

.app {
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.header { padding: 28px 0 20px; }
.header-row { display: flex; align-items: center; justify-content: space-between; }

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.back-link {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px;
  color: var(--text-muted); transition: all 0.2s; flex-shrink: 0;
  background: var(--tab-bg); border: 1px solid var(--border);
  margin-inline-end: 6px;
}
.back-link:hover { background: var(--border); color: var(--text); border-color: var(--accent); transform: scale(1.05); }
.back-link:active { transform: scale(0.95); }
.back-link svg { width: 22px; height: 22px; }
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--btn-bg);
  color: white;
  border-radius: 12px;
  font-size: 20px;
}

.header-actions { display: flex; align-items: center; gap: 6px; }

.lang-toggle, .theme-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: var(--tab-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.lang-toggle:hover, .theme-toggle:hover { background: var(--border); }
.lang-sep { color: var(--text-light); font-weight: 400; }

.theme-toggle .sun { display: block; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

.subtitle {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
}

.main-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 24px 24px 28px;
  box-shadow: var(--shadow);
  transition: background 0.2s;
}

.tabs {
  display: flex;
  gap: 4px;
  background: var(--tab-bg);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 8px;
  border: none;
  background: transparent;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.tab:hover { color: var(--text); }
.tab.active { background: var(--tab-active); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.tab-content { display: none; }
.tab-content.active { display: block; }

.step { margin-bottom: 22px; }
.step:last-of-type { margin-bottom: 20px; }

.step-header { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.step-num {
  display: flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 8px;
  background: var(--accent-bg); color: var(--accent);
  font-size: 13px; font-weight: 700;
}
.step-title { font-size: 13px; font-weight: 600; color: var(--text-muted); }

.upload-zone {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.upload-zone:hover { border-color: var(--text-light); background: var(--hover-bg); }
.upload-zone.dragover { border-color: var(--accent); background: var(--accent-bg); }
.upload-icon { margin-bottom: 10px; }
.upload-icon svg { stroke: var(--upload-icon); }
.upload-text { font-size: 14px; font-weight: 500; color: var(--text); }
.upload-hint { margin-top: 4px; font-size: 12px; color: var(--text-light); }

.file-info {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--hover-bg); border-radius: 12px; margin-top: 8px;
}
.file-icon { flex-shrink: 0; }
.file-icon svg { stroke: var(--file-icon); }
.file-name { font-size: 13px; font-weight: 600; color: var(--text); word-break: break-all; }
.file-size { font-size: 12px; color: var(--text-light); margin-top: 2px; }
.file-remove { margin-right: auto; background: none; border: none; font-size: 20px; color: var(--text-light); cursor: pointer; padding: 0 4px; line-height: 1; }
.file-remove:hover { color: var(--error-text); }

.format-group { margin-bottom: 12px; }
.format-group:last-child { margin-bottom: 0; }
.format-group-label { display: flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.format-group-label svg { stroke: var(--text-muted); }
.format-chips { display: flex; flex-wrap: wrap; gap: 6px; }

.format-chip {
  padding: 7px 14px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 12px; font-weight: 600; color: var(--text-muted);
  cursor: pointer; transition: all 0.15s; background: var(--card-bg);
}

.format-chip:hover:not(.disabled) { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.format-chip.active { border-color: var(--accent); background: var(--accent); color: white; }
.format-chip.disabled { opacity: 0.3; cursor: not-allowed; }

/* Options grid */
.opts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opts-col { display: flex; flex-direction: column; gap: 4px; }
.opts-col label { font-size: 11px; font-weight: 600; color: var(--text-muted); }
.opts-col input, .opts-col select {
  padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 13px; outline: none; background: var(--card-bg); color: var(--text);
  transition: border 0.15s;
}
.opts-col input:focus, .opts-col select:focus { border-color: var(--accent); }

/* File List */
.file-list { margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
.file-list-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; background: var(--hover-bg); border-radius: 10px; }
.file-list-item .file-name { flex: 1; font-size: 12px; }
.file-list-remove { background: none; border: none; font-size: 18px; color: var(--text-light); cursor: pointer; }
.file-list-remove:hover { color: var(--error-text); }

.pages-input {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 14px; outline: none; background: var(--card-bg); color: var(--text);
  transition: border 0.15s;
}
.pages-input:focus { border-color: var(--accent); }

.convert-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 14px 24px; background: var(--btn-bg); color: white;
  border: none; border-radius: 12px; font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
}
.convert-btn:hover:not(:disabled) { background: var(--btn-hover); }
.convert-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.convert-btn.loading { opacity: 0.7; pointer-events: none; }

.result {
  margin-top: 24px; text-align: center; padding: 24px;
  background: var(--success-bg); border-radius: 16px; border: 1px solid var(--success-border);
}
.result-icon { margin-bottom: 10px; }
.result-text { font-size: 16px; font-weight: 700; color: var(--success-text); margin-bottom: 14px; }
.result-size { font-size: 12px; color: var(--text-light); margin-bottom: 12px; }

.download-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; background: var(--download-bg); color: white;
  text-decoration: none; border-radius: 10px; font-size: 14px; font-weight: 600;
  transition: background 0.15s;
}
.download-btn:hover { background: var(--download-hover); }

/* Side by side */
.compare { display: flex; gap: 12px; margin-top: 16px; }
.compare-col { flex: 1; text-align: center; }
.compare-label { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 6px; }
.compare img { width: 100%; border-radius: 10px; border: 1px solid var(--border); max-height: 200px; object-fit: contain; }

#status { margin-top: 10px; padding: 10px 16px; border-radius: 8px; font-size: 13px; }
#status.success { display: none; }
#status.error { background: var(--error-bg); color: var(--error-text); border: 1px solid var(--error-border); }

/* OCR */
.ocr-result { margin-top: 16px; }
.ocr-text {
  width: 100%; padding: 14px; border: 1.5px solid var(--border); border-radius: 10px;
  font-size: 13px; background: var(--code-bg); color: var(--text);
  resize: vertical; outline: none; font-family: inherit; line-height: 1.6;
}

.copy-btn {
  margin-top: 8px; padding: 8px 20px; background: var(--accent); color: white;
  border: none; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background 0.15s;
}
.copy-btn:hover { opacity: 0.9; }

.spinner {
  display: inline-block; width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3); border-top-color: white;
  border-radius: 50%; animation: spin 0.6s linear infinite;
}

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

/* HTML preview */
.html-preview {
  margin-top: 12px; padding: 14px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--code-bg); max-height: 300px; overflow: auto;
  font-size: 13px; text-align: start;
}

/* Color converter */
.color-row { display: flex; gap: 10px; }
.color-field { flex: 1; }
.color-field label { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; }
.color-field input { width: 100%; padding: 8px 12px; border: 1.5px solid var(--border); border-radius: 8px; font-size: 13px; outline: none; background: var(--card-bg); color: var(--text); transition: border 0.15s; }
.color-field input:focus { border-color: var(--accent); }
.color-preview { height: 60px; border-radius: 10px; margin-top: 14px; border: 1px solid var(--border); transition: background 0.15s; }
.color-swatches { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.color-swatch { width: 32px; height: 32px; border-radius: 8px; cursor: pointer; border: 2px solid transparent; transition: border 0.15s; }
.color-swatch:hover { border-color: var(--accent); }

/* SEO content */
.seo-content { margin-bottom: 20px; }
.seo-content h2 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.seo-content p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 8px; }
.seo-content ol { padding: 0 20px 0 0; margin: 8px 0; }
.seo-content li { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; line-height: 1.5; }
.seo-content ol li::marker { color: var(--accent); font-weight: 600; }

.format-chip.locked { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); cursor: default; opacity: 0.85; }

/* Focused mode banner */
.focused-banner {
  text-align: center;
  padding: 28px 20px;
  margin-bottom: 20px;
  background: var(--accent-bg);
  border: 1.5px solid var(--accent);
  border-radius: 14px;
}
.focused-arrows {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 10px;
}
.focused-src, .focused-dst {
  font-size: 22px;
  font-weight: 800;
  padding: 8px 18px;
  border-radius: 10px;
  color: white;
}
.focused-src { background: var(--text-light); }
.focused-dst { background: var(--accent); }
.focused-arrows svg { color: var(--text-muted); flex-shrink: 0; }
.focused-desc { font-size: 13px; color: var(--text-muted); }

/* Fixed language toggle */
.lang-toggle-fixed {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.9);
}
[data-theme="dark"] .lang-toggle-fixed { background: rgba(30,41,59,0.9); }
.lang-toggle-fixed:hover { background: var(--border); }
.lang-toggle-fixed .lang-sep { color: var(--text-light); font-weight: 400; }

@media (max-width: 500px) {
  .app { padding: 16px 12px 32px; }
  .main-card { padding: 20px 14px; }
  .opts-grid { grid-template-columns: 1fr; }
  .tab { font-size: 11px; padding: 8px 4px; }
  .tab svg { width: 14px; height: 14px; }
  .compare { flex-direction: column; }
}