/* ============================================
   PDF 转换工具 - 样式表
   ============================================ */

:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --success: #059669;
  --danger: #DC2626;
  --bg: #F9FAFB;
  --card: #FFFFFF;
  --border: #E5E7EB;
  --text: #111827;
  --text-secondary: #6B7280;
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 40px 16px;
}

.container {
  width: 100%;
  max-width: 560px;
}

/* ── Header ──────────────────────────────── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.logo {
  font-size: 22px;
  font-weight: 700;
}
.status-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.dot-on  { background:#059669; }
.dot-off { background:#DC2626;  }
.dot-warn{ background:#D97706; }

/* ── Tabs ───────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--border);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 20px;
}
.tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
  color: var(--text-secondary);
}
.tab.active {
  background: var(--card);
  color: var(--primary);
  box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

/* ── Panels ─────────────────────────────── */
.panel { display:none; }
.panel.active { display:block; }

.sub-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.sub-tab {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--card);
  font-size: 13px;
  cursor: pointer;
  transition: all .2s;
  color: var(--text-secondary);
}
.sub-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ── Upload ─────────────────────────────── */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: var(--card);
  margin-bottom: 16px;
}
.upload-area:hover,
.upload-area.dragover {
  border-color: var(--primary);
  background: #EEF2FF;
}
.upload-icon { font-size:40px; margin-bottom:8px; }
.upload-area p { color: var(--text-secondary); font-size:14px; }
.upload-area .hint { font-size:12px; margin-top:4px; opacity:.7; }

.file-list {
  margin-bottom: 16px;
}
.file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 6px;
  font-size: 14px;
}
.file-item .remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 18px;
}

.file-info {
  margin-bottom: 16px;
  padding: 10px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

/* ── Options ────────────────────────────── */
.options {
  margin-bottom: 16px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.radio-label {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

/* ── Buttons ────────────────────────────── */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  text-align: center;
  text-decoration: none;
}
.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  width: 100%;
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-success {
  background: var(--success);
  color: #fff;
}
.btn-secondary {
  background: var(--border);
  color: var(--text);
  margin-left: 8px;
}

/* ── Progress ───────────────────────────── */
.progress-area {
  margin-top: 20px;
}
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  width: 0%;
  transition: width .3s;
}
.progress-area p {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
}

/* ── Result ─────────────────────────────── */
.result-area {
  margin-top: 24px;
  text-align: center;
  padding: 24px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.result-icon { font-size:48px; margin-bottom:8px; }
.result-area p { margin-bottom:16px; font-size:15px; }

.hidden { display:none !important; }

/* ── Responsive ─────────────────────────── */
@media (max-width: 480px) {
  body { padding: 20px 12px; }
  .logo { font-size: 18px; }
  .upload-area { padding: 28px 16px; }
}