:root {
  --bg: #f5f6fa;
  --panel: #ffffff;
  --text: #1f2430;
  --text-2: #6b7280;
  --primary: #4f6ef7;
  --primary-dark: #3d5ae0;
  --border: #e5e7eb;
  --success: #10b981;
  --danger: #ef4444;
  --warn: #f59e0b;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ---------- 登录 ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}
.auth-card {
  background: var(--panel); border-radius: 16px;
  padding: 40px 36px; width: 100%; max-width: 380px;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  text-align: center;
}
.auth-logo { font-size: 44px; }
.auth-card h1 { font-size: 20px; margin: 8px 0 20px; }
.tabs { display: flex; gap: 8px; margin-bottom: 20px; background: var(--bg); border-radius: 10px; padding: 4px; }
.tab {
  flex: 1; padding: 9px; border: none; background: transparent;
  border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--text-2);
}
.tab.active { background: var(--panel); color: var(--text); font-weight: 600; box-shadow: 0 1px 4px rgba(0,0,0,.1); }
#auth-form input {
  width: 100%; padding: 12px 14px; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: 10px; font-size: 14px; outline: none;
}
#auth-form input:focus { border-color: var(--primary); }

/* ---------- 顶栏 / 导航 ---------- */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--panel); padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 17px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.user-badge { color: var(--text-2); font-size: 13px; }
.nav-tabs { display: flex; gap: 4px; padding: 12px 24px 0; }
.nav-tab {
  padding: 10px 20px; border: none; background: transparent; cursor: pointer;
  font-size: 14px; color: var(--text-2); border-radius: 10px 10px 0 0;
  border-bottom: 2px solid transparent;
}
.nav-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; background: var(--panel); }
.badge {
  background: var(--primary); color: #fff; border-radius: 99px;
  padding: 1px 8px; font-size: 11px; margin-left: 2px;
}

/* ---------- 内容区 ---------- */
.content { max-width: 900px; margin: 24px auto; padding: 0 24px; }
.panel {
  background: var(--panel); border-radius: 14px; padding: 28px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.panel h2 { font-size: 17px; margin-bottom: 18px; }
.field-label { display: block; font-size: 13px; color: var(--text-2); margin: 14px 0 6px; }
textarea#prompt {
  width: 100%; padding: 12px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 14px; font-family: inherit; resize: vertical; outline: none;
}
textarea#prompt:focus { border-color: var(--primary); }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-col { flex: 1; min-width: 160px; }
select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 14px; background: #fff; outline: none;
}

.btn {
  border: none; border-radius: 10px; cursor: pointer;
  font-size: 14px; padding: 10px 18px; transition: background .15s;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; border: 1px solid var(--border); color: var(--text-2); }
.btn.ghost:hover { border-color: var(--text-2); }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn.big { width: 100%; margin-top: 20px; padding: 13px; font-size: 15px; font-weight: 600; }
.btn.danger-text { background: transparent; color: var(--danger); padding: 6px 12px; font-size: 13px; }

.msg { margin-top: 12px; font-size: 13px; min-height: 18px; }
.msg.error { color: var(--danger); }
.msg.ok { color: var(--success); }

/* ---------- 模式切换 / 上传 ---------- */
.mode-tabs { display: flex; gap: 8px; margin-bottom: 4px; }
.mode-tab {
  padding: 8px 18px; border: 1px solid var(--border); background: #fff;
  border-radius: 99px; cursor: pointer; font-size: 14px; color: var(--text-2);
}
.mode-tab.active { border-color: var(--primary); color: var(--primary); font-weight: 600; background: #eef1fe; }
.upload-box {
  border: 2px dashed var(--border); border-radius: 12px; padding: 18px;
  text-align: center; cursor: pointer; color: var(--text-2); font-size: 13.5px;
  transition: border-color .15s;
}
.upload-box:hover { border-color: var(--primary); }
#upload-preview { max-width: 200px; max-height: 160px; border-radius: 8px; margin-top: 8px; }
.save-tip { margin-top: 10px; font-size: 12px; color: var(--text-2); }

/* 图片格角上的下载按钮 */
.img-cell .dl-btn {
  position: absolute; right: 6px; bottom: 6px; z-index: 2;
  background: rgba(0,0,0,.6); color: #fff; text-decoration: none;
  border-radius: 6px; padding: 3px 8px; font-size: 12px;
}
.img-cell .dl-btn:hover { background: rgba(0,0,0,.85); }

/* ---------- 任务列表 ---------- */
.task-list { display: flex; flex-direction: column; gap: 16px; }
.task-card {
  background: var(--panel); border-radius: 14px; padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.task-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; flex-wrap: wrap; }
.task-meta { color: var(--text-2); font-size: 12.5px; line-height: 1.7; }
.task-status { font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 99px; }
.st-pending { background: #fef3c7; color: #92400e; }
.st-running { background: #dbeafe; color: #1d4ed8; }
.st-done { background: #d1fae5; color: #065f46; }
.st-partial { background: #ffedd5; color: #9a3412; }
.st-failed { background: #fee2e2; color: #991b1b; }
.task-actions { display: flex; gap: 6px; }
.ref-thumb {
  width: 44px; height: 44px; object-fit: cover; border-radius: 6px;
  vertical-align: middle; border: 1px solid var(--border); margin-left: 4px;
}

.img-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px; margin-top: 14px;
}
.img-cell { position: relative; }
.img-cell img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: 10px; cursor: zoom-in; background: var(--bg);
  border: 1px solid var(--border);
}
.img-cell .pending-cell {
  width: 100%; aspect-ratio: 1; border-radius: 10px; background: var(--bg);
  border: 1px dashed var(--border); display: flex; align-items: center; justify-content: center;
  color: var(--text-2); font-size: 12px;
}
.img-cell .failed-cell {
  width: 100%; aspect-ratio: 1; border-radius: 10px; background: #fef2f2;
  border: 1px solid #fecaca; display: flex; align-items: center; justify-content: center;
  color: var(--danger); font-size: 11px; padding: 8px; text-align: center; overflow: hidden;
}
.empty-tip { text-align: center; color: var(--text-2); padding: 60px 0; font-size: 14px; }

/* ---------- 预览弹层 ---------- */
.lightbox {
  position: fixed; inset: 0; background: rgba(0,0,0,.85);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  cursor: zoom-out;
}
.lightbox img { max-width: 92vw; max-height: 92vh; border-radius: 8px; }