/* ============================================================
   ai-math 拍题助手 · 样式(简洁暖色系,与「天狗食题」同风格)
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #fafbfd;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #b45309;   /* 琥珀 */
  --primary-dark: #92400e;
  --danger: #dc2626;
  --ok: #16a34a;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ---------- 导航 ---------- */
.navbar { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.navbar-inner { max-width: 860px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 20px; }
.logo { font-weight: 700; font-size: 18px; color: var(--primary); text-decoration: none; }
.nav-links { display: flex; gap: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-links a.active, .nav-links a:hover { color: var(--primary); }

.container { max-width: 860px; margin: 0 auto; padding: 28px 16px 60px; }
.page-title { font-size: 24px; margin-bottom: 6px; }
.page-desc { color: var(--muted); margin-bottom: 20px; }

/* ---------- 上传区 ---------- */
.dropzone {
  border: 2px dashed #d1d5db; border-radius: 14px; background: #fff;
  padding: 30px; text-align: center; cursor: pointer; transition: all .15s;
}
.dropzone.dragging { border-color: var(--primary); background: #fffbeb; }
.dz-icon { font-size: 44px; margin-bottom: 8px; }
.dz-text { color: var(--muted); margin-bottom: 16px; }
.dz-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.dz-preview img { max-width: 100%; max-height: 380px; border-radius: 10px; margin-bottom: 12px; }
.dz-preview-actions { display: flex; gap: 10px; justify-content: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 8px 18px; border: 1px solid var(--border);
  border-radius: 8px; background: #fff; color: var(--text); font-size: 14px;
  cursor: pointer; transition: all .15s;
}
.btn:hover { background: #f3f4f6; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-danger { background: #fff; border-color: #fca5a5; color: var(--danger); }
.btn-danger:hover { background: #fef2f2; }
.btn-big { display: block; width: 100%; padding: 14px; font-size: 16px; margin-top: 16px; }

/* ---------- 选项 ---------- */
.options { display: flex; gap: 20px; margin-top: 16px; }
.radio { display: flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; }

/* ---------- 状态/错误 ---------- */
.status { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: #fffbeb; color: #92400e; font-size: 14px; }
.status.loading::before { content: ""; display: inline-block; width: 12px; height: 12px; margin-right: 8px;
  border: 2px solid #d1d5db; border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -1px; }
.error { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: #fef2f2; color: var(--danger); font-size: 14px; }
.warning { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: #fffbeb; color: #92400e; font-size: 14px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 卡片 ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; margin-bottom: 20px; }
.card h2 { font-size: 17px; margin-bottom: 12px; }
.card h2 small { font-weight: 400; color: var(--muted); font-size: 13px; }
.card-actions { display: flex; gap: 10px; align-items: center; margin-top: 12px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 13px; }
.hint.loading::before { content: ""; display: inline-block; width: 11px; height: 11px; margin-right: 6px;
  border: 2px solid #d1d5db; border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -1px; }

textarea {
  width: 100%; min-height: 120px; padding: 12px; border: 1px solid var(--border);
  border-radius: 10px; font: 14px/1.6 ui-monospace, "Cascadia Code", Consolas, monospace;
  resize: vertical; background: #fcfcfd;
}
textarea:focus { outline: 2px solid #fcd34d; border-color: var(--primary); }

/* ---------- Markdown 正文 ---------- */
.markdown-body { padding: 6px 2px; word-break: break-word; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin: 14px 0 8px; }
.markdown-body h2 { font-size: 18px; border-left: 4px solid var(--primary); padding-left: 10px; }
.markdown-body h3, .markdown-body h4 { font-size: 15px; }
.markdown-body p { margin: 8px 0; }
.markdown-body ul, .markdown-body ol { margin: 8px 0 8px 22px; }
.markdown-body li { margin: 3px 0; }
.markdown-body code { background: #f3f4f6; padding: 1px 5px; border-radius: 5px; font-size: 13px; }
.markdown-body pre { background: #f3f4f6; padding: 12px; border-radius: 10px; overflow-x: auto; }
.markdown-body blockquote { border-left: 3px solid #d1d5db; padding-left: 12px; color: var(--muted); margin: 8px 0; }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 4px 0; }

/* ---------- 移动端 ---------- */
@media (max-width: 600px) {
  .container { padding: 18px 12px 50px; }
  .dropzone { padding: 22px 12px; }
  .page-title { font-size: 20px; }
}