* { box-sizing: border-box; }
:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --line: #e3e7ee;
  --text: #1f2533;
  --sub: #6b7488;
  --main: #3a6ff2;
  --main-dark: #2c58cc;
  --ok: #1f9d55;
  --warn: #d97706;
  --radius: 10px;
}
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
}

.topbar {
  height: 54px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
}
.logo { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.top-tip { color: var(--sub); font-size: 12px; }

.layout { display: flex; height: calc(100% - 54px); }

.sidebar {
  width: 190px;
  flex: none;
  background: #fff;
  border-right: 1px solid var(--line);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 0;
  background: transparent;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}
.nav-item i { font-style: normal; }
.nav-item:hover { background: #f0f3fa; }
.nav-item.active { background: #e8efff; color: var(--main-dark); font-weight: 600; }
.side-box {
  margin-top: 14px;
  padding: 10px 10px 12px;
  border-top: 1px solid var(--line);
}
.sb-title { font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.sb-state { font-size: 11px; color: var(--sub); margin: 6px 12px 4px; word-break: break-all; }
.sb-check { display: flex; align-items: center; gap: 6px; font-size: 12px; margin: 4px 12px; cursor: pointer; }
.sb-check input { accent-color: var(--main); }
.sb-tip { font-size: 11px; color: #98a1b3; margin: 2px 12px; }
.side-safe {
  padding: 8px 12px;
  font-size: 11px;
  color: #1f7a4d;
  background: #eefaf3;
  border-top: 1px solid var(--line);
  cursor: help;
}
.side-safe b { color: #0f5c38; }
.side-foot { color: var(--sub); font-size: 12px; padding: 8px 12px; }

.content { flex: 1; overflow: auto; padding: 20px 24px 60px; }
.panel { display: none; max-width: 1080px; }
.panel.active { display: block; }
.panel-head h2 { margin: 0 0 4px; font-size: 20px; }
.panel-head p { margin: 0 0 16px; color: var(--sub); font-size: 13px; }
.sub-head {
  margin: 18px 0 8px;
  font-weight: 600;
  font-size: 14px;
  padding-left: 8px;
  border-left: 3px solid var(--main);
}

/* 拖放区 */
.dz {
  border: 2px dashed #c9d2e3;
  border-radius: var(--radius);
  background: #fafbfe;
  padding: 26px;
  text-align: center;
  cursor: pointer;
  transition: .15s;
}
.dz:hover, .dz.over { border-color: var(--main); background: #f2f6ff; }
.dz-inner { color: var(--sub); }
.dz-inner b { color: var(--main); }
.dz-inner small { display: block; margin-top: 6px; font-size: 12px; color: #98a1b3; }

.filelist { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 4px; }
.fitem {
  position: relative;
  width: 74px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 4px;
  text-align: center;
}
.fitem img {
  width: 100%;
  height: 54px;
  object-fit: contain;
  display: block;
  background:
    repeating-conic-gradient(#eceff5 0% 25%, #fff 0% 50%) 50% / 12px 12px;
}
.fitem span {
  display: block;
  font-size: 11px;
  color: var(--sub);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 2px;
}
.fitem .dir {
  display: block;
  font-style: normal;
  font-size: 10px;
  color: #98a1b3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.fitem .del {
  position: absolute;
  top: -6px; right: -6px;
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 0;
  background: #ff5b5b;
  color: #fff;
  font-size: 12px;
  line-height: 18px;
  cursor: pointer;
  padding: 0;
}

/* 选项 */
.optgrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin: 14px 0;
}
.opt {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
}
.opt-title { display: block; font-size: 12px; color: var(--sub); margin-bottom: 6px; }
.opt-title b { color: var(--main); }
.opt input[type=number], .opt input[type=text], .opt select {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 13px;
  background: #fff;
  color: var(--text);
}
.opt input[type=range] { width: 100%; accent-color: var(--main); }
.opt input[type=color] { width: 46px; height: 30px; padding: 0; border: 1px solid var(--line); background: #fff; }
.opt input[type=checkbox], .opt input[type=radio] { accent-color: var(--main); }
.opt .checks, .opt .radios { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; }
.opt .checks label, .opt .radios label { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.opt .inline { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.opt .inline input[type=number] { width: 90px; }

.actions { display: flex; gap: 10px; margin: 6px 0 18px; }
.btn {
  padding: 9px 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.btn:hover { border-color: var(--main); color: var(--main); }
.btn.primary { background: var(--main); border-color: var(--main); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--main-dark); color: #fff; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.tiny { padding: 3px 10px; font-size: 12px; border-radius: 6px; margin-left: 6px; }
.hexbox { font-family: Consolas, "Courier New", monospace; font-size: 12px; color: var(--sub); }

/* 结果 */
.result { margin-top: 6px; }
.res-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--sub);
  flex-wrap: wrap;
}
.res-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}
.res-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px;
  text-align: center;
  cursor: pointer;
}
.res-card:hover { border-color: var(--main); }
.res-card img {
  max-width: 100%;
  height: 92px;
  object-fit: contain;
  display: block;
  margin: 0 auto 6px;
  background:
    repeating-conic-gradient(#eceff5 0% 25%, #fff 0% 50%) 50% / 14px 14px;
}
.res-card .nm { font-size: 12px; word-break: break-all; color: var(--text); }
.res-card .sz { font-size: 11px; color: var(--sub); }

.cmp { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 12px; }
.cmp > div { text-align: center; }
.cmp .cap { font-size: 12px; color: var(--sub); margin-bottom: 4px; }
.cmp img {
  max-width: 320px;
  max-height: 240px;
  border: 1px solid var(--line);
  background:
    repeating-conic-gradient(#eceff5 0% 25%, #fff 0% 50%) 50% / 16px 16px;
}

/* 取色器 */
.picker-box { grid-column: 1 / -1; }
.swatch {
  display: inline-block;
  width: 26px; height: 26px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  vertical-align: middle;
}
.swatch.on {
  background-image: none;
}
.pick-info { font-size: 12px; color: var(--sub); }
.pick-info b { color: var(--main); }
.stage {
  margin-top: 8px;
  padding: 10px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fafbfe;
  text-align: center;
}
.stage canvas {
  max-width: 100%;
  cursor: crosshair;
  border: 1px solid var(--line);
  background:
    repeating-conic-gradient(#eceff5 0% 25%, #fff 0% 50%) 50% / 16px 16px;
}
.stage .cap { font-size: 12px; color: var(--sub); margin-top: 6px; }

#toast { position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%); z-index: 99; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
  background: #1f2533;
  color: #fff;
  padding: 9px 18px;
  border-radius: 20px;
  font-size: 13px;
  box-shadow: 0 6px 20px rgba(0,0,0,.18);
  animation: fade .25s;
}
.toast.err { background: #d64545; }
.toast.ok { background: var(--ok); }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } }