:root{
  --accent: #4f6ef7; --accent-dark: #3f59d6; --violet: #a855f7;
  --bg: #f6f8fb; --card: #fff; --line: #e4e9f2;
  --text: #1f2937; --muted: #6b7280; --green: #16a34a; --red: #ef4444;
}#flipTool img{ -webkit-user-drag: none; user-drag: none; }#flipTool .hidden{ display: none !important; }#flipTool .topbar{
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px; background: #fff; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20; flex-wrap: wrap; gap: 8px;
}#flipTool .brand{ font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 9px; }#flipTool .brand .logo{
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--violet));
  display: grid; place-items: center; color: #fff; font-size: 16px;
}#flipTool .badge{ font-size: 12px; color: var(--green); background: #ecfdf5; border: 1px solid #bbf7d0; padding: 5px 11px; border-radius: 999px; white-space: nowrap; }#flipTool .hero{ max-width: 1080px; margin: 0 auto; padding: 40px 24px 6px; text-align: center; }#flipTool .hero h1{ font-size: 30px; margin-bottom: 9px; }#flipTool .hero .sub{ color: var(--muted); margin-bottom: 26px; line-height: 1.7; }#flipTool .dropzone{
  max-width: 1080px; margin: 22px auto 0; padding: 34px 20px;
  border: 2px dashed #b6c5ea; background: #f0f5ff; border-radius: 18px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transition: all .18s;
}#flipTool .dropzone{ padding: 46px 24px; }#flipTool .dropzone.dragover{ border-color: var(--accent); background: #e8efff; transform: scale(1.005); }#flipTool .dz-icon{ font-size: 32px; margin-bottom: 10px; }#flipTool .dz-main{ font-size: 15px; font-weight: 700; margin: 2px 0 4px; line-height: 1.6; }#flipTool .dz-actions{ display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin: 12px 0 0; }#flipTool .dz-actions .btn{ margin: 2px 0; }#flipTool .dz-hint{ color: var(--muted); font-size: 12px; margin-top: 8px; }#flipTool .dz-start{ display: flex; flex-direction: column; align-items: center; justify-content: center; width: 100%; }#flipTool .dz-selected{ width: 100%; }#flipTool .dz-sel-head{ display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }#flipTool .dz-sel-info{ font-size: 13px; font-weight: 700; color: var(--text); }#flipTool .dz-sel-grid{ display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; max-height: 260px; overflow-y: auto; }#flipTool .dz-sel-thumb{ position: relative; aspect-ratio: 1 / 1; border-radius: 10px; overflow: hidden; background: #eef2f8; }#flipTool .dz-sel-thumb img{ position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }#flipTool .dz-sel-thumb .t-name{ position: absolute; left: 4px; right: 4px; top: 4px; font-size: 10px; color: #fff;
  background: rgba(15,20,40,.55); border-radius: 6px; padding: 2px 6px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; }#flipTool .dz-sel-thumb .t-dim{ position: absolute; left: 4px; bottom: 4px; font-size: 10px; color: #fff;
  background: rgba(15,20,40,.6); border-radius: 5px; padding: 1px 6px; pointer-events: none; }#flipTool .flip-settings{
  max-width: 1080px; margin: 18px auto 0; padding: 16px 20px;
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
}#flipTool .flip-settings .fs-title{
  font-size: 13px; font-weight: 700; color: var(--muted);
  letter-spacing: 1px; margin: 0 0 12px;
}#flipTool .flip-options{ display: flex; gap: 10px; flex-wrap: wrap; }#flipTool .flip-options label{
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); border-radius: 999px;
  padding: 9px 16px; cursor: pointer; font-size: 14px; font-weight: 600;
  background: #fff; color: var(--text); transition: all .15s;
}#flipTool .flip-options label:hover{ border-color: var(--accent); }#flipTool .flip-options input{ accent-color: var(--accent); margin: 0; }#flipTool .flip-options label:has(input:checked){
  border-color: var(--accent); background: #eef2ff; color: var(--accent);
}#flipTool .trust{ max-width: 1080px; margin: 16px auto 0; padding: 0 24px; font-size: 13px; color: var(--muted); }#flipTool .stats{
  max-width: 1080px; margin: 22px auto 0; padding: 0 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
}#flipTool .stats .txt{ font-size: 14px; }#flipTool .stats .actions{ display: flex; gap: 10px; }#flipTool .grid{
  max-width: 1080px; margin: 22px auto 48px; padding: 0 24px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px;
}#flipTool .empty{ grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 40px 0; font-size: 14px; }#flipTool .card{
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; box-shadow: 0 1px 2px rgba(16,24,40,.05); display: flex; flex-direction: column;
}#flipTool .thumb{
  position: relative; aspect-ratio: 4 / 3; touch-action: none; cursor: ew-resize;
  background: repeating-conic-gradient(#f1f3f7 0 25%, #fff 0 50%) 0 0 / 14px 14px;
  user-select: none; -webkit-user-select: none;
}#flipTool .thumb img{ position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; pointer-events: none; user-select: none; }#flipTool .f-orig-wrap{
  position: absolute; inset: 0; clip-path: inset(0 50% 0 0);
  background: repeating-conic-gradient(#f1f3f7 0 25%, #fff 0 50%) 0 0 / 14px 14px;
}#flipTool .f-handle{
  position: absolute; top: 0; bottom: 0; left: 50%; width: 2px;
  background: var(--accent); transform: translateX(-1px); z-index: 2; pointer-events: none;
}#flipTool .f-handle::after{
  content: ""; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 24px; height: 24px; border-radius: 50%; background: var(--accent);
  border: 3px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,.25);
}#flipTool .cmp-label{
  position: absolute; bottom: 8px; pointer-events: none;
  font-size: 11px; font-weight: 700; color: #fff;
  background: rgba(15,20,40,.62); border-radius: 6px; padding: 2px 8px;
}#flipTool .cmp-label.lbl-before{ left: 8px; }#flipTool .cmp-label.lbl-after{ right: 8px; }#flipTool .wm{
  position: absolute; z-index: 7; pointer-events: none; white-space: nowrap;
  font-size: 15px; font-weight: 800; letter-spacing: 1px;
  color: rgba(255,255,255,.62); background: rgba(255,255,255,.22);
  border: 1px solid rgba(255,255,255,.5); padding: 2px 10px; border-radius: 8px;
  text-shadow: 0 1px 2px rgba(0,0,0,.12); opacity: .82;
}#flipTool .meta{ padding: 12px 14px 4px; }#flipTool .name{ font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }#flipTool .sub-meta{ font-size: 12px; color: var(--muted); margin-top: 4px; }#flipTool .card-actions{ display: flex; gap: 8px; padding: 10px 14px 14px; align-items: center; flex-wrap: wrap; }#flipTool .card-actions select{ flex: 1 1 130px; min-width: 120px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px; background: #fff; font-size: 13px; color: var(--text); }#flipTool .btn{
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; border-radius: 9px; cursor: pointer; font-size: 14px; transition: background .15s;
  padding: 8px 14px; background: #eef2f8; color: #334155; font-weight: 600;
}#flipTool .btn:hover{ background: #e2e8f0; }#flipTool .btn.primary{ background: linear-gradient(135deg, var(--accent), var(--violet)); color: #fff; padding: 11px 20px; }#flipTool .btn.primary:hover{ opacity: .93; }#flipTool .btn.secondary{ background: #fff; color: var(--accent); border: 1px solid #b6c5ea; padding: 10px 16px; }#flipTool .btn.secondary:hover{ background: #f0f5ff; }#flipTool .btn.small{ padding: 7px 12px; font-size: 12px; }#flipTool .btn.small:disabled{ opacity: .45; cursor: not-allowed; }#flipTool .btn.green{ background: var(--green); color: #fff; }#flipTool .btn.green:hover{ background: #15803d; }#flipTool .btn.danger{ background: #fef2f2; color: var(--red); }#flipTool .btn.danger:hover{ background: #fee2e2; }#flipTool .toast{
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(10px);
  background: #1f2937; color: #fff; padding: 10px 18px; border-radius: 10px; font-size: 13px;
  box-shadow: 0 4px 14px rgba(0,0,0,.25); opacity: 0; pointer-events: none; transition: all .25s;
  z-index: 100; max-width: 80vw;
}#flipTool .toast.show{ opacity: 1; transform: translateX(-50%) translateY(0); }#flipTool .footer{ max-width: 1080px; margin: 0 auto 50px; padding: 0 24px; color: var(--muted); font-size: 12px; line-height: 1.9; }@media (max-width: 640px){#flipTool .hero h1{ font-size: 24px; }#flipTool .grid{ grid-template-columns: 1fr; }#flipTool .topbar{ padding: 12px 16px; }
}#flipTool .act-gate{
  position: absolute; inset: 0; z-index: 200;
  background: #f6f8fb; display: flex; align-items: center; justify-content: center; padding: 20px;
}#flipTool .act-card{
  width: min(92vw, 420px); background: #fff; border: 1px solid var(--line);
  border-radius: 18px; padding: 28px 22px; text-align: center;
  box-shadow: 0 20px 60px rgba(15,20,40,.12);
}#flipTool .act-logo{
  width: 44px; height: 44px; margin: 0 auto 14px; border-radius: 13px;
  background: linear-gradient(135deg, #4f6ef7, #a855f7); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}#flipTool .act-title{ margin: 0 0 8px; font-size: 17px; font-weight: 800; }#flipTool .act-sub{ margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }