:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #fff;
  --ink: #1d2733;
  --muted: #667385;
  --line: #e4e8ee;
  --navy: #1b2b40;
  --teal: #0f9f8f;
  --soft: #eef2f6;
  --stage: #f8fafc;
  --dot: #d5dbe3;
  --bar: rgba(255, 255, 255, 0.94);
  --on-accent: #fff;
  --shadow: 0 10px 30px rgba(27, 43, 64, 0.06);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
body.dark {
  color-scheme: dark;
  --bg: #10151c;
  --panel: #1b2430;
  --ink: #eef3f8;
  --muted: #a8b3c2;
  --line: #314052;
  --navy: #49c2b0;
  --teal: #49c2b0;
  --soft: #263140;
  --stage: #121922;
  --dot: #314052;
  --bar: rgba(16, 21, 28, 0.94);
  --on-accent: #06211d;
  --shadow: none;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
button, input { font: inherit; }
button { cursor: pointer; }

.bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 22px;
  background: var(--bar);
  border-bottom: 1px solid var(--line);
}
body { padding-top: 72px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); margin-top: 2px; }
.mark { width: 42px; height: 28px; display: block; flex: 0 0 auto; }
.switches { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.icon-btn, .github {
  width: 42px;
  height: 42px;
  min-width: 42px;
  min-height: 42px;
  flex: 0 0 42px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: var(--panel);
  overflow: hidden;
}
.icon-btn svg, .github svg { width: 20px; height: 20px; display: block; }
.support { color: #e2556a; }
.sheet { position: fixed; z-index: 40; inset: 0; display: grid; place-items: center; padding: 18px; background: rgba(15, 23, 32, 0.62); }
.sheet[hidden] { display: none; }
.sheet-card { width: min(100%, 420px); padding: 16px; border-radius: 18px; background: var(--panel); color: var(--ink); box-shadow: 0 18px 50px rgba(15, 23, 32, 0.28); }
.support-choices { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.support-choices a, .support-choices button { min-height: 48px; flex: 1 1 140px; border: 0; border-radius: 12px; background: var(--soft); color: var(--ink); display: grid; place-items: center; text-decoration: none; }
.support-choices .active { background: var(--navy); color: var(--on-accent); }

#wechat-code { margin: 14px 0 0; }
#wechat-code[hidden] { display: none; }
#wechat-code img { width: min(100%, 280px); display: block; margin: 0 auto; border-radius: 12px; background: #fff; }
.icon-btn .moon, body.dark .icon-btn .sun { display: none; }
body.dark .icon-btn .moon { display: block; }
.icon-btn { font-size: 13px; font-weight: 700; line-height: 1; }
.export, .empty button, #pick-empty {
  border: 0;
  border-radius: 10px;
  background: var(--navy);
  color: var(--on-accent);
  padding: 10px 16px;
}

.layout {
  width: min(1280px, calc(100% - 28px));
  margin: 22px auto 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: start;
}
.preview, aside section, .legal {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.preview { padding: 16px; }
aside { display: grid; gap: 14px; }
aside section, .legal { padding: 16px; }
.head, .foot, .pair { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.head span, .muted, .note, .legal, .drop small { color: var(--muted); }
h2 { margin: 0; font-size: 16px; }
.note, .legal, .muted { font-size: 13px; line-height: 1.55; }
.legal { margin: 0; }

.stage {
  margin: 14px 0;
  padding: 22px 12px;
  border-radius: 14px;
  background:
    radial-gradient(circle, var(--dot) 1px, transparent 1.2px) 0 0 / 16px 16px,
    var(--stage);
}
.card {
  position: relative;
  width: min(100%, 860px);
  margin: 0 auto;
  aspect-ratio: 1536 / 969;
  background: #fff;
  overflow: visible;
  touch-action: none;
  box-shadow: 0 12px 30px rgba(27, 43, 64, 0.12);
}
.card.round { border-radius: 3.7%; }
canvas, #layers, .empty { position: absolute; inset: 0; width: 100%; height: 100%; }
#reference { pointer-events: none; }
.toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  top: 28%;
  transform: translateX(-50%);
  max-width: min(92vw, 460px);
  padding: 18px 28px;
  border-radius: 16px;
  background: #1b2b40;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  box-shadow: 0 16px 40px rgba(15, 23, 32, 0.28);
  pointer-events: none;
}
.toast[hidden] { display: none; }
.drop.pulse {
  border-color: var(--teal);
  border-style: solid;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--teal) 35%, transparent);
  animation: drop-pulse 0.7s ease 2;
}
@keyframes drop-pulse { 50% { transform: scale(1.015); } }
.empty {
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  padding: 24px;
  color: #1d2733;
}
.empty[hidden] { display: none; }
.empty p { max-width: 360px; color: #667385; }

.foot { flex-wrap: wrap; }
.modes { display: flex; padding: 3px; border-radius: 999px; background: var(--soft); }
.modes button, .pair button, .tab, .layer {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 9px;
  min-height: 40px;
  padding: 8px 10px;
}
.modes button { border: 0; border-radius: 999px; }
.check { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.modes button.active, .tab.active { background: var(--navy); color: var(--on-accent); }
.quiet { border: 0; background: transparent; color: var(--muted); }

.drop {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 4px;
  min-height: 108px;
  margin: 12px 0;
  border: 1.5px dashed #c9d1db;
  border-radius: 14px;
  background: var(--stage);
  cursor: pointer;
}
.drop input { display: none; }
.pair { margin: 8px 0; }
.pair label, aside label { display: grid; gap: 6px; flex: 1; color: var(--muted); font-size: 13px; }
input[type="range"] { width: 100%; }

.tabs { display: flex; gap: 6px; overflow: auto; padding-bottom: 8px; }
.tab { white-space: nowrap; }
.library {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  max-height: 280px;
  overflow: auto;
}
.logo-panel { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.request { border-radius: 999px; background: var(--navy); color: var(--on-accent); padding: 8px 14px; font-size: 13px; text-decoration: none; white-space: nowrap; }
.drop.compact { min-height: 72px; }
.handle { position: absolute; z-index: 3; width: 28px; height: 28px; margin: -14px; padding: 0; display: grid; place-items: center; border: 2px solid #fff; border-radius: 50%; background: var(--teal); color: var(--on-accent); box-shadow: 0 1px 4px rgba(0,0,0,.3); touch-action: none; }
.handle svg { width: 14px; height: 14px; pointer-events: none; }
.handle.scale { left: 100%; top: 100%; cursor: nwse-resize; }
.handle.rotate { left: 50%; top: -24px; cursor: grab; background: var(--navy); }
.handle.lock { left: 0; top: 0; cursor: pointer; background: var(--navy); }
.badge.locked .handle.lock { background: var(--teal); }
.stage { overflow: hidden; }
.logo-panel.disabled .drop { opacity: 0.55; pointer-events: none; }
.badge.locked { cursor: default; }
#editor.locked input[type="range"] { pointer-events: none; opacity: 0.45; }
.lib-btn {
  display: grid;
  justify-items: center;
  gap: 4px;
  min-height: 72px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  color: var(--ink);
  padding: 8px;
}
.lib-btn img { width: 84px; height: 34px; object-fit: contain; }

.badge { position: absolute; transform-origin: center; cursor: grab; }
.badge.selected { outline: 2px solid var(--teal); outline-offset: 4px; }
.badge img { width: 100%; height: auto; display: block; pointer-events: none; }
.obj-name { margin: 0 0 8px; font-weight: 650; }
.layers { display: grid; gap: 6px; }
.layer { display: flex; justify-content: space-between; width: 100%; text-align: left; }
.layer.active { border-color: var(--navy); }

@media (max-width: 900px) {
  .layout { display: block; }
  .bar { padding: 12px; }
  .layout { width: min(100% - 20px, 1280px); margin: 12px auto 28px; }
  .preview { margin-bottom: 14px; }
  .head, .foot, .pair { align-items: stretch; flex-wrap: wrap; }
  .library { grid-template-columns: repeat(3, minmax(0, 1fr)); max-height: none; }
  .tabs { -webkit-overflow-scrolling: touch; }
}