/* =====================================================
   视频生成系统后台 — 通用样式
   ===================================================== */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:        #0f172a;
  --bg2:       #1e293b;
  --bg3:       #334155;
  --border:    rgba(255,255,255,.08);
  --border2:   rgba(255,255,255,.14);
  --text:      #f1f5f9;
  --text2:     #94a3b8;
  --text3:     #64748b;
  --primary:   #6366f1;
  --primary2:  #818cf8;
  --success:   #22c55e;
  --warning:   #f59e0b;
  --danger:    #ef4444;
  --info:      #06b6d4;
  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 4px 24px rgba(0,0,0,.3);
  --sidebar-w: 240px;
}
body{font-family:'PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5}

/* ── 滚动条 ── */
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:4px}

/* ── 布局 ── */
.layout{display:flex;min-height:100vh}

/* ── 侧边栏 ── */
.sidebar{width:var(--sidebar-w);flex-shrink:0;background:var(--bg2);
  border-right:1px solid var(--border);display:flex;flex-direction:column;
  position:fixed;left:0;top:0;bottom:0;z-index:100;transition:width .25s}

.sidebar-logo{display:flex;align-items:center;gap:11px;padding:22px 20px 20px;
  border-bottom:1px solid var(--border)}
.sidebar-logo .icon{width:36px;height:36px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,#6366f1,#ec4899);
  display:flex;align-items:center;justify-content:center}
.sidebar-logo .icon svg{width:18px;height:18px;stroke:#fff;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}
.sidebar-logo .title{font-size:14px;font-weight:700;color:var(--text);white-space:nowrap}
.sidebar-logo .sub{font-size:11px;color:var(--text3);margin-top:1px}

.sidebar-nav{flex:1;overflow-y:auto;padding:12px 10px}
.nav-group{margin-bottom:4px}
.nav-group-title{font-size:10px;font-weight:700;color:var(--text3);
  letter-spacing:.1em;text-transform:uppercase;padding:8px 12px 4px}

.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;
  border-radius:var(--radius-sm);color:var(--text2);font-size:13px;
  font-weight:500;cursor:pointer;transition:all .15s;text-decoration:none;
  position:relative}
.nav-item svg{width:16px;height:16px;stroke:currentColor;fill:none;
  stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.nav-item:hover{background:rgba(255,255,255,.06);color:var(--text)}
.nav-item.active{background:rgba(99,102,241,.18);color:var(--primary2)}
.nav-item.active::before{content:'';position:absolute;left:0;top:4px;bottom:4px;
  width:3px;background:var(--primary);border-radius:0 2px 2px 0}
.nav-badge{margin-left:auto;min-width:18px;height:18px;padding:0 5px;
  background:var(--danger);border-radius:9px;font-size:10px;font-weight:700;
  color:#fff;display:flex;align-items:center;justify-content:center}

.sidebar-footer{padding:14px 16px;border-top:1px solid var(--border)}
.admin-info{display:flex;align-items:center;gap:10px}
.admin-avatar{width:32px;height:32px;border-radius:50%;
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;color:#fff;flex-shrink:0}
.admin-name{font-size:13px;font-weight:600;color:var(--text)}
.admin-role{font-size:11px;color:var(--text3)}
.btn-logout{margin-left:auto;width:28px;height:28px;border:none;border-radius:8px;
  background:rgba(239,68,68,.12);color:var(--danger);cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:all .15s}
.btn-logout:hover{background:rgba(239,68,68,.25)}
.btn-logout svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}

/* ── 主内容区 ── */
.main{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;
  min-height:100vh}

.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:0 28px;height:60px;background:var(--bg2);
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:99}
.topbar-title{font-size:16px;font-weight:700;color:var(--text)}
.topbar-right{display:flex;align-items:center;gap:12px}

.content{padding:28px;flex:1}

/* ── 统计卡片 ── */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;margin-bottom:28px}
.stat-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 22px;position:relative;overflow:hidden;transition:border-color .2s}
.stat-card:hover{border-color:var(--border2)}
.stat-card::after{content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,var(--glow-color,.2) 0%,transparent 60%);
  opacity:.08;pointer-events:none}
.stat-card[data-color="indigo"]{--glow-color:#6366f1}
.stat-card[data-color="green"]{--glow-color:#22c55e}
.stat-card[data-color="yellow"]{--glow-color:#f59e0b}
.stat-card[data-color="red"]{--glow-color:#ef4444}
.stat-card[data-color="cyan"]{--glow-color:#06b6d4}

.stat-label{font-size:12px;color:var(--text3);font-weight:600;
  text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.stat-value{font-size:32px;font-weight:800;color:var(--text);line-height:1}
.stat-sub{font-size:12px;color:var(--text3);margin-top:8px}
.stat-icon{position:absolute;right:18px;top:18px;width:38px;height:38px;
  border-radius:10px;display:flex;align-items:center;justify-content:center}
.stat-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}

/* ── 卡片 ── */
.card{background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden}
.card-header{display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;border-bottom:1px solid var(--border)}
.card-title{font-size:15px;font-weight:700;color:var(--text)}
.card-sub{font-size:12px;color:var(--text3);margin-top:2px}
.card-body{padding:22px}
.card-actions{display:flex;align-items:center;gap:8px}

/* ── 表格 ── */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
thead th{padding:10px 14px;text-align:left;font-size:11px;font-weight:700;
  color:var(--text3);text-transform:uppercase;letter-spacing:.06em;
  border-bottom:1px solid var(--border);white-space:nowrap;background:var(--bg)}
tbody tr{border-bottom:1px solid var(--border);transition:background .12s}
tbody tr:last-child{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,.03)}
tbody td{padding:12px 14px;color:var(--text2);vertical-align:middle}
.td-mono{font-family:'SF Mono','Fira Code',monospace;font-size:12px;color:var(--text3)}

/* ── 徽章 ── */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;
  border-radius:20px;font-size:11px;font-weight:700;white-space:nowrap}
.badge::before{content:'';width:5px;height:5px;border-radius:50%;background:currentColor}
.badge-green{background:rgba(34,197,94,.12);color:#4ade80}
.badge-red{background:rgba(239,68,68,.12);color:#f87171}
.badge-yellow{background:rgba(245,158,11,.12);color:#fbbf24}
.badge-blue{background:rgba(99,102,241,.12);color:#818cf8}
.badge-cyan{background:rgba(6,182,212,.12);color:#22d3ee}
.badge-gray{background:rgba(100,116,139,.12);color:#94a3b8}

/* ── 按钮 ── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:0 16px;height:36px;
  border-radius:var(--radius-sm);font-size:13px;font-weight:600;cursor:pointer;
  border:1px solid transparent;transition:all .15s;white-space:nowrap}
.btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:#4f46e5;box-shadow:0 4px 16px rgba(99,102,241,.35)}
.btn-secondary{background:rgba(255,255,255,.07);color:var(--text2);border-color:var(--border2)}
.btn-secondary:hover{background:rgba(255,255,255,.12);color:var(--text)}
.btn-danger{background:rgba(239,68,68,.12);color:var(--danger);border-color:rgba(239,68,68,.2)}
.btn-danger:hover{background:rgba(239,68,68,.2)}
.btn-success{background:rgba(34,197,94,.12);color:var(--success);border-color:rgba(34,197,94,.2)}
.btn-success:hover{background:rgba(34,197,94,.2)}
.btn-sm{height:28px;padding:0 10px;font-size:12px}
.btn-sm svg{width:12px;height:12px}
.btn-icon{width:32px;height:32px;padding:0;justify-content:center;border-radius:8px}
.btn-icon.btn-sm{width:26px;height:26px;border-radius:6px}

/* ── 表单 ── */
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group.full{grid-column:1/-1}
.form-label{font-size:12px;font-weight:600;color:var(--text2);
  letter-spacing:.04em}
.form-label .req{color:var(--danger);margin-left:3px}
.form-input,.form-select,.form-textarea{width:100%;background:rgba(255,255,255,.06);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  color:var(--text);font-size:13px;outline:none;transition:all .2s;
  font-family:inherit}
.form-input,.form-select{height:40px;padding:0 12px}
.form-textarea{padding:10px 12px;min-height:80px;resize:vertical;line-height:1.6}
.form-input::placeholder,.form-textarea::placeholder{color:var(--text3)}
.form-input:focus,.form-select:focus,.form-textarea:focus{
  border-color:var(--primary);background:rgba(99,102,241,.08);
  box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.form-select option{background:var(--bg2)}
.form-hint{font-size:11px;color:var(--text3)}
.form-toggle{display:flex;align-items:center;gap:10px}
.toggle{position:relative;width:44px;height:24px;cursor:pointer}
.toggle input{opacity:0;width:0;height:0;position:absolute}
.toggle-track{position:absolute;inset:0;background:var(--bg3);
  border-radius:12px;transition:background .2s}
.toggle input:checked~.toggle-track{background:var(--primary)}
.toggle-thumb{position:absolute;left:3px;top:3px;width:18px;height:18px;
  background:#fff;border-radius:50%;transition:transform .2s;
  box-shadow:0 1px 4px rgba(0,0,0,.3)}
.toggle input:checked~.toggle-track~.toggle-thumb,
.toggle input:checked+.toggle-track+.toggle-thumb{transform:translateX(20px)}

/* ── 模态框 ── */
.modal-overlay{position:fixed;inset:0;z-index:1000;
  background:rgba(0,0,0,.7);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;padding:20px;
  opacity:0;visibility:hidden;transition:all .2s}
.modal-overlay.show{opacity:1;visibility:visible}
.modal{background:var(--bg2);border:1px solid var(--border2);
  border-radius:16px;width:100%;max-width:560px;max-height:88vh;
  overflow-y:auto;box-shadow:0 32px 80px rgba(0,0,0,.5);
  transform:translateY(16px);transition:transform .2s}
.modal-overlay.show .modal{transform:translateY(0)}
.modal-header{display:flex;align-items:center;justify-content:space-between;
  padding:20px 24px;border-bottom:1px solid var(--border)}
.modal-title{font-size:16px;font-weight:700;color:var(--text)}
.modal-close{width:28px;height:28px;border:none;border-radius:8px;
  background:rgba(255,255,255,.07);color:var(--text2);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  transition:all .15s;line-height:1}
.modal-close:hover{background:rgba(255,255,255,.12);color:var(--text)}
.modal-body{padding:24px}
.modal-footer{display:flex;justify-content:flex-end;gap:10px;
  padding:16px 24px;border-top:1px solid var(--border)}

/* ── 通知 Toast ── */
.toast-container{position:fixed;top:20px;right:20px;z-index:9999;
  display:flex;flex-direction:column;gap:8px}
.toast{display:flex;align-items:center;gap:10px;padding:12px 16px;
  background:var(--bg2);border:1px solid var(--border2);border-radius:10px;
  box-shadow:var(--shadow);min-width:260px;max-width:360px;
  animation:toastIn .25s ease;font-size:13px;color:var(--text)}
.toast.leaving{animation:toastOut .2s ease forwards}
@keyframes toastIn{from{opacity:0;transform:translateX(16px)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateX(16px)}}
.toast-icon{width:20px;height:20px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.toast-success .toast-icon{background:rgba(34,197,94,.18);color:var(--success)}
.toast-error .toast-icon{background:rgba(239,68,68,.18);color:var(--danger)}
.toast-info .toast-icon{background:rgba(99,102,241,.18);color:var(--primary2)}
.toast-left{display:flex;flex-direction:column;gap:1px;flex:1}
.toast-title{font-weight:600}
.toast-msg{font-size:12px;color:var(--text2)}

/* ── 空状态 ── */
.empty{display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:48px 20px;color:var(--text3);text-align:center;gap:12px}
.empty svg{width:48px;height:48px;opacity:.3;stroke:currentColor;fill:none;
  stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.empty p{font-size:13px}

/* ── 分页 ── */
.pagination{display:flex;align-items:center;gap:6px;padding:16px 22px 0;
  border-top:1px solid var(--border)}
.page-btn{width:32px;height:32px;border:1px solid var(--border);border-radius:8px;
  background:transparent;color:var(--text2);cursor:pointer;font-size:13px;
  display:flex;align-items:center;justify-content:center;transition:all .15s}
.page-btn:hover{background:rgba(255,255,255,.07);color:var(--text)}
.page-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}
.page-btn:disabled{opacity:.35;pointer-events:none}
.page-info{font-size:12px;color:var(--text3);margin-left:auto}

/* ── 进度条 ── */
.progress{height:6px;background:rgba(255,255,255,.08);border-radius:3px;overflow:hidden}
.progress-bar{height:100%;border-radius:3px;background:var(--primary);
  transition:width .3s;min-width:4px}
.progress-bar.success{background:var(--success)}
.progress-bar.warning{background:var(--warning)}
.progress-bar.danger{background:var(--danger)}

/* ── 搜索栏 ── */
.search-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.search-input-wrap{position:relative;flex:1;min-width:200px}
.search-input-wrap svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);
  width:14px;height:14px;stroke:var(--text3);fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.search-input{width:100%;height:36px;padding:0 12px 0 34px;
  background:rgba(255,255,255,.06);border:1px solid var(--border);
  border-radius:var(--radius-sm);color:var(--text);font-size:13px;outline:none;
  transition:all .2s}
.search-input::placeholder{color:var(--text3)}
.search-input:focus{border-color:var(--primary);background:rgba(99,102,241,.08);
  box-shadow:0 0 0 3px rgba(99,102,241,.15)}

/* ── 视频预览 ── */
.video-thumb{width:100%;aspect-ratio:16/9;background:var(--bg);
  border-radius:var(--radius-sm);overflow:hidden;position:relative;
  display:flex;align-items:center;justify-content:center}
.video-thumb video{width:100%;height:100%;object-fit:cover}
.video-thumb .play-overlay{position:absolute;inset:0;display:flex;
  align-items:center;justify-content:center;
  background:rgba(0,0,0,.4);transition:all .2s;cursor:pointer}
.video-thumb:hover .play-overlay{background:rgba(0,0,0,.2)}
.play-btn{width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.9);
  display:flex;align-items:center;justify-content:center}
.play-btn svg{width:20px;height:20px;fill:var(--bg);stroke:none;margin-left:3px}

/* ── 响应式 ── */
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:none}
  .main{margin-left:0}
  .content{padding:16px}
  .form-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}