:root{
  --bg:#ffffff;
  --fg:#0e1116;
  --muted:#5a6675;
  --card:#f5f7fa;
  --border:rgba(18, 25, 34, .12);
  --accent:#2b6cff;
  --accentFg:#ffffff;
  --shadow:0 10px 30px rgba(0,0,0,.08);
  --radius:16px;
}

html[data-theme="dark"]{
  --bg:#0c0f14;
  --fg:#e9edf3;
  --muted:#a9b3c1;
  --card:#141a23;
  --border:rgba(233, 237, 243, .12);
  --accent:#64a6ff;
  --accentFg:#0c0f14;
  --shadow:0 14px 40px rgba(0,0,0,.5);
}

html[data-theme="pink"]{
  --bg:#fff3f8;
  --fg:#1b1016;
  --muted:#7a5a69;
  --card:#ffe3ef;
  --border:rgba(27, 16, 22, .12);
  --accent:#ff2f86;
  --accentFg:#ffffff;
  --shadow:0 12px 34px rgba(255,47,134,.18);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--fg);
}

.app{
  min-height:100%;
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:14px;
  max-width:1080px;
  margin:0 auto;
}

.topbar{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  align-items:flex-start;
  justify-content:space-between;
}

.brand__title{
  font-size:20px;
  font-weight:750;
  letter-spacing:.2px;
}
.brand__sub{
  font-size:13px;
  color:var(--muted);
  margin-top:4px;
}

.topbar__actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-end;
  align-items:center;
  position:relative;
}

.iconBtn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--fg);
  padding:10px 12px;
  border-radius:999px;
  font-size:14px;
  cursor:pointer;
  transition:transform .15s ease,filter .15s ease;
  touch-action:manipulation;
}
.iconBtn:hover{filter:brightness(1.02)}
.iconBtn:active{transform:scale(.99)}
.iconBtn__icon{font-size:16px;line-height:1}
.iconBtn__text{font-weight:650}

.menuPanel{
  position:absolute;
  right:0;
  top:calc(100% + 10px);
  z-index:50;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:12px;
  display:none;
  flex-direction:column;
  gap:10px;
  align-items:stretch;
}
.menuPanel.is-open{display:flex}
.menuPanel .segmented{justify-content:center}

.menuOverlay{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.35);
  z-index:40;
}

@media (max-width: 720px){
  .topbar{align-items:center}
  .menuPanel{
    position:fixed;
    left:12px;
    right:12px;
    top:calc(16px + env(safe-area-inset-top) + 54px);
    z-index:50;
  }
}

.segmented{
  display:flex;
  border:1px solid var(--border);
  background:color-mix(in srgb, var(--card) 70%, var(--bg));
  border-radius:999px;
  padding:3px;
  gap:3px;
  box-shadow:0 1px 0 rgba(0,0,0,.04);
}

.segmented__btn{
  border:0;
  background:transparent;
  color:var(--muted);
  padding:8px 10px;
  border-radius:999px;
  font-size:13px;
  cursor:pointer;
  transition:background .15s ease,color .15s ease,transform .15s ease;
  touch-action:manipulation;
}

.segmented__btn[aria-pressed="true"]{
  background:var(--bg);
  color:var(--fg);
  box-shadow:0 6px 18px rgba(0,0,0,.08);
}

.segmented__btn:active{transform:scale(.98)}

.grid{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  align-items:start;
}

@media (min-width: 900px){
  .grid{grid-template-columns:1fr 1.1fr}
  .brand__title{font-size:22px}
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.formCard{padding:14px}
.previewCard{padding:14px}

.form{display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:8px}
.field__labelRow{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:10px;
}
.field__label{font-size:13px;color:var(--muted)}
.field__value{
  font-size:13px;
  color:var(--muted);
  font-variant-numeric: tabular-nums;
}
.field__input{
  appearance:none;
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--fg);
  border-radius:12px;
  padding:12px 12px;
  font-size:16px;
  outline:none;
}
.field__input:focus{
  border-color:color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.row{
  display:grid;
  grid-template-columns: 1fr;
  gap:10px;
  align-items:end;
}

@media (min-width: 520px){
  .row{grid-template-columns: 220px 1fr}
}

.field--compact .field__input{padding:10px 12px}

.range{
  width:100%;
  accent-color:var(--accent);
  height:34px;
}

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.chip{
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--fg);
  padding:8px 10px;
  border-radius:999px;
  font-size:13px;
  cursor:pointer;
  transition:transform .15s ease,filter .15s ease;
  touch-action:manipulation;
}
.chip:hover{filter:brightness(1.02)}
.chip:active{transform:scale(.99)}

.hint{
  font-size:13px;
  color:var(--muted);
  line-height:1.4;
}

.actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.btn{
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--fg);
  padding:11px 14px;
  border-radius:12px;
  font-size:15px;
  cursor:pointer;
  transition:transform .15s ease,filter .15s ease,background .15s ease,border-color .15s ease;
  touch-action:manipulation;
}
.btn:hover{filter:brightness(1.02)}
.btn:active{transform:scale(.99)}

.btn--primary{
  background:var(--accent);
  border-color:color-mix(in srgb, var(--accent) 70%, var(--border));
  color:var(--accentFg);
}

.btn--ghost{
  background:transparent;
}

.btn[disabled], .btn[aria-disabled="true"]{
  opacity:.55;
  cursor:not-allowed;
}

.status{
  min-height:18px;
  font-size:13px;
  color:var(--muted);
}

.previewHeader{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  margin-bottom:12px;
}

.previewTitle{
  font-size:14px;
  color:var(--muted);
}

.previewActions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}

.preview{
  position:relative;
  background:var(--bg);
  border:1px dashed var(--border);
  border-radius:14px;
  overflow:hidden;
  min-height:260px;
  display:flex;
  align-items:center;
  justify-content:center;
}

.preview__img{
  max-width:100%;
  height:auto;
  display:none;
}

.empty{
  padding:18px;
  text-align:center;
  color:var(--muted);
}

.empty__title{
  font-weight:650;
  color:color-mix(in srgb, var(--fg) 75%, var(--muted));
}

.empty__sub{
  margin-top:8px;
  font-size:13px;
  line-height:1.5;
}

.footer{
  margin-top:auto;
  padding:8px 2px;
}
.footer__text{
  font-size:12px;
  color:var(--muted);
  text-align:center;
}