:root {
  --bg: #0b0f17;
  --bg-2: #111722;
  --panel: #141b27;
  --panel-2: #1a2333;
  --border: #233044;
  --text: #e6edf6;
  --text-dim: #8b9bb4;
  --accent: #ff4d4f;
  --up: #ff4d4f;
  --down: #00c853;
  --gold: #ffb300;
  --blue: #2979ff;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(0,0,0,.45);
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Microsoft YaHei','PingFang SC','Segoe UI',system-ui,sans-serif;
  font-size: 14px;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 22px;
  background: linear-gradient(180deg, #121925, #0d131d);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.brand-logo { font-size: 22px; }
.brand-name { font-size: 20px; font-weight: 800; letter-spacing: .5px;
  background: linear-gradient(90deg, var(--up), var(--gold));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-sub { font-size: 12px; color: var(--text-dim); }

.tabs { display: flex; gap: 6px; margin-left: 8px; }
.tab {
  background: transparent; color: var(--text-dim);
  border: 1px solid transparent; padding: 8px 14px; border-radius: 9px;
  cursor: pointer; font-size: 14px; transition: .15s;
}
.tab:hover { color: var(--text); background: var(--panel-2); }
.tab.active { color: #fff; background: var(--panel-2); border-color: var(--border); }

.topbar-right { margin-left: auto; display: flex; gap: 8px; }
.tag { font-size: 12px; padding: 3px 10px; border-radius: 20px; font-weight: 700; }
.tag-up { background: rgba(255,77,79,.15); color: var(--up); border: 1px solid rgba(255,77,79,.4); }
.tag-down { background: rgba(0,200,83,.15); color: var(--down); border: 1px solid rgba(0,200,83,.4); }

/* ---------- Layout ---------- */
main { padding: 22px; max-width: 1320px; margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px);} to {opacity:1; transform:none;} }

.workspace { display: grid; grid-template-columns: 360px 1fr; gap: 22px; align-items: start; }

/* ---------- Controls ---------- */
.controls {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 16px;
}
.ctrl-group { display: flex; flex-direction: column; gap: 7px; }
.ctrl-group > label { font-size: 12px; color: var(--text-dim); font-weight: 600; }
.ctrl-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ctrl-group.check { flex-direction: row; gap: 18px; }
.ctrl-group.check label { display: flex; align-items: center; gap: 6px; color: var(--text); font-size: 13px; font-weight: 500; }

select, input[type="text"], textarea {
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 10px; font-size: 13px; font-family: inherit; width: 100%;
  resize: vertical;
}
select:focus, input:focus, textarea:focus { outline: none; border-color: var(--accent); }
input[type="color"] { width: 100%; height: 38px; background: var(--bg-2); border: 1px solid var(--border); border-radius: 8px; cursor: pointer; padding: 3px; }
input[type="range"] { width: 100%; accent-color: var(--accent); }

.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg.small button { padding: 6px 10px; font-size: 12px; }
.seg button {
  flex: 1; min-width: 60px; background: var(--bg-2); color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 6px;
  cursor: pointer; font-size: 13px; transition: .15s;
}
.seg button:hover { color: var(--text); }
.seg button.active { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 700; }

/* ---------- Buttons ---------- */
.btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 9px; padding: 10px 16px; cursor: pointer; font-size: 14px;
  transition: .15s; font-family: inherit;
}
.btn:hover { border-color: var(--accent); color: #fff; }
.btn.block { width: 100%; }
.btn-primary { background: linear-gradient(90deg, var(--up), #ff7a45); border: none; color: #fff; font-weight: 700; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; }
.btn-danger { background: rgba(255,77,79,.12); border-color: rgba(255,77,79,.5); color: var(--up); }
.btn-danger:hover { background: rgba(255,77,79,.22); }

/* ---------- Preview ---------- */
.preview { display: flex; flex-direction: column; gap: 14px; align-items: center; }
.canvas-wrap {
  position: relative; width: 100%; background:
    linear-gradient(45deg,#0e1420 25%,transparent 25%) 0 0/24px 24px,
    linear-gradient(-45deg,#0e1420 25%,transparent 25%) 0 0/24px 24px,
    linear-gradient(45deg,transparent 75%,#0e1420 75%) 0 0/24px 24px,
    linear-gradient(-45deg,transparent 75%,#0e1420 75%) 0 0/24px 24px,
    #0b0f17;
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; display: flex; justify-content: center; align-items: center;
  min-height: 320px;
}
#gen-canvas, #edit-canvas {
  max-width: 100%; height: auto; border-radius: 6px;
  box-shadow: 0 10px 40px rgba(0,0,0,.5);
}
#edit-canvas { cursor: default; }

/* ---------- 框取裁切 ---------- */
.canvas-box { position: relative; display: inline-block; line-height: 0; }
.canvas-box .crop-layer { position: absolute; inset: 0; cursor: crosshair; z-index: 5; user-select: none; }
.canvas-box .crop-layer[hidden] { display: none; }
.canvas-box .crop-box {
  position: absolute; border: 2px solid #fff; cursor: move;
  box-shadow: 0 0 0 9999px rgba(0,0,0,.55);
  box-sizing: border-box;
}
.canvas-box .crop-box::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.3) 1px, transparent 1px);
  background-size: 33.33% 33.33%;
}
.canvas-box .crop-box.active { border-color: var(--accent); }
.canvas-box .crop-h {
  position: absolute; width: 14px; height: 14px; background: #fff;
  border: 2px solid var(--accent); border-radius: 50%;
  transform: translate(-50%, -50%);
}
.crop-h[data-h="nw"]{ left:0; top:0; cursor:nwse-resize; }
.crop-h[data-h="n"] { left:50%; top:0; cursor:ns-resize; }
.crop-h[data-h="ne"]{ left:100%; top:0; cursor:nesw-resize; }
.crop-h[data-h="e"] { left:100%; top:50%; cursor:ew-resize; }
.crop-h[data-h="se"]{ left:100%; top:100%; cursor:nwse-resize; }
.crop-h[data-h="s"] { left:50%; top:100%; cursor:ns-resize; }
.crop-h[data-h="sw"]{ left:0; top:100%; cursor:nesw-resize; }
.crop-h[data-h="w"] { left:0; top:50%; cursor:ew-resize; }
.empty-hint {
  position: absolute; color: var(--text-dim); font-size: 14px; pointer-events: none;
}
.preview-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; justify-content: center; }
.preview-actions .hint { color: var(--text-dim); font-size: 12px; }
button:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Editor layers ---------- */
.layer-list { list-style: none; display: flex; flex-direction: column; gap: 6px; max-height: 180px; overflow-y: auto; }
.layer-list li {
  background: var(--bg-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; cursor: pointer; font-size: 13px; display: flex;
  justify-content: space-between; align-items: center; gap: 8px;
}
.layer-list li.active { border-color: var(--accent); background: rgba(255,77,79,.1); }
.layer-list li .lname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-list li .lvis { color: var(--text-dim); font-size: 12px; }
.layer-controls { border-top: 1px dashed var(--border); padding-top: 14px; display: flex; flex-direction: column; gap: 14px; }
.hidden { display: none !important; }

/* ---------- Template library ---------- */
.tpl-head { margin-bottom: 18px; }
.tpl-head h2 { font-size: 20px; margin-bottom: 6px; }
.tpl-head p { color: var(--text-dim); font-size: 13px; }
.tpl-head .up { color: var(--up); } .tpl-head .down { color: var(--down); }
.tpl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.tpl-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; transition: .18s; box-shadow: var(--shadow);
}
.tpl-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.tpl-thumb { width: 100%; aspect-ratio: 1/1; display: block; }
.tpl-meta { padding: 12px 14px; }
.tpl-meta .tname { font-weight: 700; font-size: 14px; display: flex; align-items: center; gap: 6px; }
.tpl-meta .tdesc { color: var(--text-dim); font-size: 12px; margin-top: 4px; line-height: 1.5; }

/* ---------- Footer / Toast ---------- */
.footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 22px; border-top: 1px solid var(--border); color: var(--text-dim);
  font-size: 12px; margin-top: 20px; flex-wrap: wrap; gap: 8px;
}
.footer .dim { opacity: .7; }
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: linear-gradient(90deg, var(--up), #ff7a45); color: #fff;
  padding: 11px 22px; border-radius: 30px; font-size: 14px; font-weight: 600;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .3s; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .workspace { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; gap: 12px; }
  .tabs { order: 3; width: 100%; }
}