:root {
  --bg: #f5f6fa;
  --card: #ffffff;
  --border: #e6e8ef;
  --text: #1f2329;
  --muted: #8a90a0;
  --primary: #3370ff;
  --primary-dark: #2456d8;
  --danger: #e34d59;
  --success: #00b42a;
  --warn: #ff7d00;
  --sidebar: #171a23;
}

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

body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app { display: flex; min-height: 100vh; }

/* 侧边栏 */
.sidebar {
  width: 220px;
  background: var(--sidebar);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  flex-shrink: 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 18px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--primary), #7b6bff);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700;
}
.brand-name { font-size: 16px; font-weight: 700; }
.brand-sub { font-size: 11px; color: rgba(255,255,255,.55); }

.nav { flex: 1; padding: 14px 0; }
.nav-link {
  display: block;
  padding: 11px 20px;
  color: rgba(255,255,255,.75);
  border-left: 3px solid transparent;
}
.nav-link:hover { background: rgba(255,255,255,.06); text-decoration: none; color: #fff; }
.nav-link.active { background: rgba(51,112,255,.18); border-left-color: var(--primary); color: #fff; }
.nav-link.logout { color: rgba(255,255,255,.5); }
.sidebar-footer { border-top: 1px solid rgba(255,255,255,.08); }

/* 主区 */
.main { flex: 1; }
.content { max-width: 1000px; margin: 0 auto; padding: 28px 30px 60px; }

.page-head { margin-bottom: 22px; }
.page-head h1 { font-size: 22px; margin-bottom: 4px; }
.sub { color: var(--muted); }

/* 卡片 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: 0 1px 2px rgba(0,0,0,.03);
}
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.card-head h2 { font-size: 16px; }
.section-title { font-size: 15px; margin-bottom: 14px; }

/* 表单 */
.field { margin-bottom: 14px; }
.field label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; }
.field input[type=text], .field input[type=password], .field input[type=url], .field input[type=number],
.field select, .field textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(51,112,255,.12);
}
.field textarea { resize: vertical; }
.field-row { display: flex; gap: 14px; }
.field-row .field { flex: 1; }
.field.grow { flex: 1; }
.field-hint { margin-top: 6px; font-size: 12px; color: var(--muted); }

.check { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; cursor: pointer; font-size: 13px; }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 9px 18px;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all .15s;
}
.btn:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.btn-block { width: 100%; padding: 11px; font-size: 15px; margin-top: 8px; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .6; cursor: not-allowed; }

/* 登录页 */
.auth-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1f2937, #111827);
}
.auth-card {
  width: 380px;
  background: #fff;
  border-radius: 14px;
  padding: 32px 30px;
  box-shadow: 0 20px 50px rgba(0,0,0,.3);
}
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.auth-title { font-size: 18px; margin-bottom: 20px; }
.auth-hint { margin-top: 16px; font-size: 12px; color: var(--muted); text-align: center; }

/* 统计卡片 */
.stat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 18px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  text-align: center;
}
.stat-card.danger .stat-num { color: var(--danger); }
.stat-num { font-size: 26px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--muted); margin-top: 2px; }

.quick-actions { display: flex; gap: 12px; margin-bottom: 24px; }

/* banner */
.banner { padding: 12px 16px; border-radius: 10px; margin-bottom: 18px; font-size: 14px; }
.banner.warn { background: #fff7e6; border: 1px solid #ffd591; color: #ad4e00; }
.banner.ok { background: #e8ffea; border: 1px solid #a9f1b8; color: #007a0e; }
.banner .link { text-decoration: underline; }

/* 列表 */
.card-list .list-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.card-list .list-row:last-child { border-bottom: none; }
.row-main { display: flex; align-items: center; gap: 10px; }
.row-side { display: flex; align-items: center; gap: 12px; }
.row-prompt { font-size: 13px; }
.row-time { font-size: 12px; color: var(--muted); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}
.badge.image { background: #e8f3ff; color: #0f5fd8; }
.badge.video { background: #f0ebff; color: #6b3fd8; }
.badge.status-succeeded { background: #e8ffea; color: #007a0e; }
.badge.status-failed { background: #ffece8; color: #c21515; }
.badge.status-pending, .badge.status-processing { background: #fff7e6; color: #ad4e00; }

/* 生成结果 */
.result-area { min-height: 260px; }
.result-area .media-box {
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.media-box img { width: 100%; display: block; cursor: zoom-in; }
.media-box video { width: 100%; display: block; }
.media-actions { padding: 8px; background: #fafbfc; border-top: 1px solid var(--border); text-align: right; }
.placeholder { color: var(--muted); text-align: center; padding: 40px 0; }
.error-text { color: var(--danger); padding: 20px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }

/* spinner */
.spinner {
  width: 34px; height: 34px;
  margin: 30px auto 10px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 表格 */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { color: var(--muted); font-weight: 500; background: #fafbfc; }
.prompt-cell { max-width: 280px; }
.muted { color: var(--muted); font-size: 12px; }

/* 筛选与分页 */
.filter-bar { padding: 16px; }
.filter-form .field-row { align-items: flex-end; }
.pagination { display: flex; gap: 8px; margin-top: 16px; justify-content: center; }
.page {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  color: var(--text);
}
.page.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* flash */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.flash.success { background: #e8ffea; border: 1px solid #a9f1b8; color: #007a0e; }

.hint { font-size: 12px; color: var(--muted); }

@media (max-width: 760px) {
  .sidebar { display: none; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; }
}