:root{
  --bg:#0B0D12;
  --bg-glow:rgba(78,205,196,.05);
  --panel:#12151D;
  --panel-2:#161B26;
  --panel-3:#1B2130;
  --line:#232A3A;
  --line-soft:#1B2130;
  --text:#E9ECF4;
  --muted:#8B94A8;
  --muted-2:#5C6577;
  --accent:#4ECDC4;
  --accent-deep:#0A2E2B;
  --accent-2:#60A5FA;
  --danger:#F87171;
  --radius:14px;
  --input-bg:#0D1017;
  --stage-bg:#05060A;
  --slot-border:#33405A;
  --font:"Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
}
html{color-scheme:dark;}
html.light{
  color-scheme:light;
  --bg:#F2F4F8;
  --bg-glow:rgba(13,148,136,.06);
  --panel:#FFFFFF;
  --panel-2:#F5F7FB;
  --panel-3:#EDF1F7;
  --line:#DCE3EE;
  --line-soft:#E7ECF4;
  --text:#1B2334;
  --muted:#5C6678;
  --muted-2:#8C96A8;
  --accent:#0D9488;
  --accent-deep:#FFFFFF;
  --accent-2:#3B82F6;
  --input-bg:#F7F9FC;
  --stage-bg:#E9EDF3;
  --slot-border:#BAC4D6;
}
*{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;}
body{
  font-family:var(--font);
  background:
    radial-gradient(1200px 500px at 85% -10%,rgba(96,165,250,.06),transparent 60%),
    radial-gradient(900px 420px at -10% 0%,var(--bg-glow),transparent 55%),
    var(--bg);
  color:var(--text);
  font-size:14px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(78,205,196,.28);}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-thumb{background:#242B3B;border-radius:6px;border:2px solid var(--bg);}
::-webkit-scrollbar-track{background:transparent;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input{font-family:inherit;color:inherit;}
canvas{display:block;}

/* ---------- top bar ---------- */
.topbar{
  height:58px;display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;border-bottom:1px solid var(--line-soft);
  background:rgba(11,13,18,.82);backdrop-filter:blur(12px);
  position:sticky;top:0;z-index:50;
}
.brand{display:flex;align-items:center;gap:11px;}
.mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(145deg,#161B26,#0E1118);border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);}
.brand-text{display:flex;align-items:baseline;gap:10px;}
.brand .name{font-size:19px;font-weight:900;letter-spacing:.5px;}
.brand .name::after{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;
  background:var(--accent);margin-left:3px;vertical-align:2px;}
.brand-sep{width:1px;height:14px;background:var(--line);align-self:center;}
.brand-sub{font-size:12px;color:var(--muted);letter-spacing:2px;}
.top-spec{
  display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);
  font-family:var(--mono);letter-spacing:.5px;
  border:1px solid var(--line-soft);border-radius:999px;padding:5px 14px;background:var(--panel);
}
.top-spec .sep{color:var(--muted-2);margin:0 2px;}
.pulse-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(78,205,196,.5);animation:pulse 2.4s infinite;}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(78,205,196,.45);}
  70%{box-shadow:0 0 0 7px rgba(78,205,196,0);}
  100%{box-shadow:0 0 0 0 rgba(78,205,196,0);}
}

/* ---------- layout ---------- */
.layout{display:grid;grid-template-columns:232px 1fr;min-height:calc(100vh - 58px);}
.sidenav{
  border-right:1px solid var(--line-soft);padding:20px 14px;
  display:flex;flex-direction:column;gap:4px;position:sticky;top:58px;height:calc(100vh - 58px);
}
.nav-caption{font-size:10px;color:var(--muted-2);letter-spacing:2.5px;padding:0 10px;margin-bottom:8px;}
.tree-row{
  display:flex;align-items:center;gap:8px;width:100%;
  padding:9px 10px;border-radius:9px;color:var(--text);font-size:13.5px;font-weight:500;
}
.tree-row .chev{transition:transform .2s;color:var(--muted);}
.tree-root.open .tree-row .chev{transform:rotate(90deg);}
.tree-row:hover{background:var(--panel-2);}
.tree-children{padding-left:22px;margin:2px 0 6px;position:relative;}
.tree-children::before{content:"";position:absolute;left:15px;top:-4px;bottom:10px;width:1px;background:var(--line-soft);}
.tree-leaf{
  position:relative;padding:7px 10px;border-radius:8px;font-size:12.5px;color:var(--muted);cursor:default;
}
.tree-leaf::before{content:"";position:absolute;left:-7px;top:50%;width:7px;height:1px;background:var(--line-soft);}
.tree-leaf.active{color:var(--accent);background:rgba(78,205,196,.09);font-weight:500;}
.tree-leaf.ghost{color:var(--muted-2);font-size:11.5px;}
.side-foot{margin-top:auto;padding:12px 10px;border-top:1px solid var(--line-soft);}
.foot-line{font-family:var(--mono);font-size:10.5px;color:var(--muted-2);letter-spacing:.5px;}

.main{padding:26px 34px 60px;min-width:0;}

/* ---------- home ---------- */
.view-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:20px;}
.view-head h1{font-size:21px;font-weight:700;letter-spacing:.5px;}
.view-head p{font-size:12.5px;color:var(--muted);margin-top:3px;}

.theme-rail{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.theme-chip{
  display:flex;flex-direction:column;align-items:flex-start;gap:1px;
  padding:9px 18px;border-radius:12px;border:1px solid var(--line);
  background:var(--panel);transition:all .18s ease;text-align:left;min-width:96px;
}
.theme-chip .tc-name{font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px;}
.theme-chip .tc-meta{font-size:10.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.5px;}
.theme-chip:not(.locked):hover{transform:translateY(-2px);border-color:#33405A;}
.theme-chip.active{
  border-color:rgba(78,205,196,.55);background:rgba(78,205,196,.08);
  box-shadow:0 0 0 1px rgba(78,205,196,.18),0 6px 18px -8px rgba(78,205,196,.35);
}
.theme-chip.active .tc-name{color:var(--accent);}
.theme-chip.locked{opacity:.55;border-style:dashed;cursor:not-allowed;}
.theme-chip.locked .tc-name svg{opacity:.7;}

.tpl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:18px;}
.tpl-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px;cursor:pointer;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  animation:fadeUp .5s ease both;position:relative;overflow:hidden;
}
.tpl-card::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  background:linear-gradient(160deg,rgba(255,255,255,.03),transparent 40%);opacity:0;transition:opacity .25s;
}
.tpl-card:hover{transform:translateY(-4px);border-color:rgba(78,205,196,.45);box-shadow:0 18px 34px -18px rgba(0,0,0,.7);}
.tpl-card:hover::after{opacity:1;}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}

.tpl-thumbs{display:flex;gap:10px;}
.thumb-p{flex:0 0 42%;border-radius:9px;overflow:hidden;border:1px solid var(--line-soft);}
.thumb-p canvas{width:100%;height:auto;}
.thumb-side{flex:1;display:flex;flex-direction:column;gap:8px;min-width:0;}
.thumb-w{border-radius:9px;overflow:hidden;border:1px solid var(--line-soft);}
.thumb-w canvas{width:100%;height:auto;}
.tpl-use{font-size:11px;color:var(--muted);line-height:1.55;padding:0 2px;}

.tpl-info{display:flex;align-items:center;justify-content:space-between;margin-top:14px;gap:8px;}
.tpl-name{font-size:14.5px;font-weight:600;display:flex;align-items:center;gap:8px;}
.badge{
  font-size:10px;color:var(--accent-deep);background:var(--accent);
  padding:1.5px 8px;border-radius:999px;font-weight:700;letter-spacing:1px;
}
.tpl-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;}
.tpl-tags span{
  font-size:10.5px;color:var(--muted);border:1px solid var(--line);
  padding:1px 8px;border-radius:999px;white-space:nowrap;
}
.tpl-cta{
  margin-top:14px;width:100%;padding:9px 0;border-radius:9px;font-size:13px;font-weight:600;
  color:var(--accent);border:1px solid rgba(78,205,196,.35);background:rgba(78,205,196,.06);
  transition:all .18s;display:flex;align-items:center;justify-content:center;gap:6px;
}
.tpl-cta svg{transition:transform .18s;}
.tpl-card:hover .tpl-cta{background:var(--accent);color:var(--accent-deep);}
.tpl-card:hover .tpl-cta svg{transform:translateX(3px);}

/* ---------- editor ---------- */
.editor-head{display:flex;align-items:center;gap:18px;margin-bottom:22px;}
.back-btn{
  display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);
  border:1px solid var(--line);border-radius:9px;padding:7px 13px;transition:all .18s;background:var(--panel);
}
.back-btn:hover{color:var(--text);border-color:#33405A;}
.editor-title h2{font-size:18px;font-weight:700;}
.editor-title p{font-size:12px;color:var(--muted);margin-top:2px;}

.editor-body{display:grid;grid-template-columns:392px 1fr;gap:22px;align-items:start;}

.config-panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;position:sticky;top:80px;
}
.cfg-group{margin-bottom:20px;}
.cfg-group>label{
  display:flex;align-items:center;gap:8px;font-size:11.5px;font-weight:600;color:var(--muted);
  letter-spacing:1.5px;margin-bottom:9px;
}
.opt{font-size:10px;font-weight:400;color:var(--muted-2);border:1px solid var(--line);
  padding:0 7px;border-radius:999px;letter-spacing:.5px;}
.cfg-group input[type="text"],.cfg-group input:not([type]){
  width:100%;background:var(--input-bg);border:1px solid var(--line);border-radius:10px;
  padding:10px 13px;font-size:13.5px;outline:none;transition:border-color .18s,box-shadow .18s;
}
.cfg-group input:focus{border-color:rgba(78,205,196,.6);box-shadow:0 0 0 3px rgba(78,205,196,.12);}
.hint{font-size:11px;color:var(--muted-2);margin-top:7px;}
.hint b{color:var(--accent);font-weight:500;}

.logo-row{display:flex;align-items:center;gap:14px;}
.logo-slot{
  width:58px;height:58px;border-radius:50%;border:1.5px dashed var(--slot-border);
  display:grid;place-items:center;cursor:pointer;transition:all .18s;flex:0 0 auto;
  background-size:cover;background-position:center;overflow:hidden;
}
.logo-slot:hover{border-color:var(--accent);}
.logo-slot.has{border-style:solid;border-color:rgba(78,205,196,.55);}
.logo-plus{font-size:20px;color:var(--muted-2);font-weight:300;}
.logo-slot.has .logo-plus{display:none;}
.logo-actions{display:flex;flex-direction:column;gap:8px;}
.mini-btn{
  font-size:12px;padding:6px 14px;border-radius:8px;border:1px solid var(--line);
  color:var(--muted);background:var(--panel-2);transition:all .18s;
}
.mini-btn:hover{color:var(--text);border-color:#33405A;}
.mini-btn.danger:hover{color:var(--danger);border-color:rgba(248,113,113,.5);}
.mini-btn[hidden]{display:none;}

.swatches{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}
.swatch{
  width:26px;height:26px;border-radius:50%;border:1px solid rgba(255,255,255,.14);
  position:relative;transition:transform .15s;padding:0;
}
.swatch:hover{transform:scale(1.16);}
.swatch.active{box-shadow:0 0 0 2px var(--bg),0 0 0 4px var(--accent);}
.swatch.active::after{
  content:"✓";position:absolute;inset:0;display:grid;place-items:center;
  font-size:12px;color:#0B0D12;font-weight:900;mix-blend-mode:difference;
}
.swatch.custom{
  background:conic-gradient(#f87171,#fbbf24,#34d399,#60A5FA,#a78bfa,#f472b6,#f87171);
  display:grid;place-items:center;overflow:hidden;
}
.swatch.custom.active{box-shadow:0 0 0 2px var(--bg),0 0 0 4px var(--accent-2);}
.swatch.custom input{position:absolute;inset:-6px;opacity:0;cursor:pointer;}

.tag-box{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  background:var(--input-bg);border:1px solid var(--line);border-radius:10px;padding:8px 10px;
  transition:border-color .18s;
}
.tag-box:focus-within{border-color:rgba(78,205,196,.6);}
.tag-box input{flex:1;min-width:110px;background:none;border:none;outline:none;font-size:13px;padding:4px 2px;}
.tag-chip{
  display:inline-flex;align-items:center;gap:7px;background:var(--panel-3);
  border:1px solid var(--line);border-radius:8px;padding:4px 6px 4px 11px;font-size:12.5px;
  animation:popIn .18s ease;
}
@keyframes popIn{from{transform:scale(.7);opacity:0;}to{transform:scale(1);opacity:1;}}
.tag-chip button{
  width:17px;height:17px;border-radius:50%;display:grid;place-items:center;
  font-size:12px;color:var(--muted);background:var(--panel-2);line-height:1;transition:all .15s;
}
.tag-chip button:hover{background:rgba(248,113,113,.22);color:var(--danger);}

.btn-primary{
  width:100%;padding:12px 0;border-radius:11px;margin-top:4px;
  background:linear-gradient(135deg,var(--accent),#3ABDB9);color:var(--accent-deep);
  font-size:15px;font-weight:700;letter-spacing:6px;
  transition:filter .18s,transform .12s;box-shadow:0 10px 22px -10px rgba(78,205,196,.55);
}
.btn-primary:hover{filter:brightness(1.1);}
.btn-primary:active{transform:scale(.98);}
.panel-note{font-size:10.5px;color:var(--muted-2);text-align:center;margin-top:10px;}

/* ---------- preview ---------- */
.preview-col{display:flex;flex-direction:column;gap:18px;}
.cover-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 16px 14px;transition:border-color .25s;
}
.cover-card.flash{animation:flash .5s ease;}
@keyframes flash{0%{border-color:rgba(78,205,196,.75);box-shadow:0 0 24px -6px rgba(78,205,196,.4);}100%{border-color:var(--line);}}
.cover-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
.cover-name{font-size:13px;font-weight:600;letter-spacing:1px;}
.cover-dims{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.3px;}
.cover-stage{
  background:var(--stage-bg);border-radius:10px;padding:10px;display:grid;place-items:center;
  border:1px solid var(--line-soft);
}
.cover-stage.wide canvas{width:100%;max-width:660px;height:auto;border-radius:5px;}
.cover-stage.portrait canvas{width:min(330px,72vw);height:auto;border-radius:6px;}
.export-btn{
  width:100%;margin-top:12px;padding:9px 0;border-radius:9px;font-size:12.5px;font-weight:600;
  color:var(--accent);border:1px solid rgba(78,205,196,.35);background:transparent;transition:all .18s;
  letter-spacing:1px;
}
.export-btn:hover:not(:disabled){background:rgba(78,205,196,.1);}
.export-btn:disabled{opacity:.55;cursor:wait;}
.export-note{
  text-align:center;font-family:var(--mono);font-size:10.5px;color:var(--muted-2);letter-spacing:.5px;
}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translate(-50%,80px);
  background:var(--panel-3);border:1px solid rgba(78,205,196,.5);color:var(--text);
  padding:11px 22px;border-radius:999px;font-size:13px;z-index:100;
  box-shadow:0 16px 40px -12px rgba(0,0,0,.8);opacity:0;pointer-events:none;
  transition:transform .3s cubic-bezier(.2,.9,.3,1.2),opacity .3s;
  display:flex;align-items:center;gap:8px;max-width:86vw;
}
.toast::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);flex:0 0 auto;}
.toast.show{transform:translate(-50%,0);opacity:1;}

@media (max-width:1180px){
  .editor-body{grid-template-columns:1fr;}
  .config-panel{position:static;}
}
@media (max-width:900px){
  .layout{grid-template-columns:1fr;}
  .sidenav{display:none;}
  .main{padding:18px 16px 50px;}
}

/* ---------- mobile ---------- */
@media (max-width:768px){
  .topbar{height:50px;padding:0 14px;}
  .brand-text{display:none;}
  .top-spec{display:none;}
  .theme-toggle{width:34px;height:34px;}
  .theme-toggle svg{width:16px;height:16px;}

  .layout{grid-template-columns:1fr;}
  .sidenav{display:none;}
  .main{padding:14px 13px 40px;}

  .view-head{margin-bottom:14px;}
  .view-head h1{font-size:18px;}
  .view-head p{font-size:11.5px;}

  .theme-rail{gap:7px;margin-bottom:16px;}
  .theme-chip{min-width:64px;padding:7px 13px;}
  .theme-chip .tc-name{font-size:13px;}
  .theme-chip .tc-meta{font-size:9.5px;}

  .tpl-grid{grid-template-columns:1fr;gap:14px;}
  .tpl-card{padding:13px;}
  .tpl-thumbs{flex-direction:column;gap:8px;}
  .thumb-p{flex:none;width:100%;}
  .thumb-side{flex:none;width:100%;flex-direction:row;align-items:center;gap:10px;}
  .thumb-w{flex:0 0 42%;}
  .tpl-use{font-size:10.5px;flex:1;}
  .tpl-info{margin-top:11px;}
  .tpl-name{font-size:13.5px;}
  .tpl-tags span{font-size:10px;}
  .tpl-cta{margin-top:11px;padding:10px 0;font-size:12.5px;}

  .editor-head{gap:10px;flex-wrap:wrap;margin-bottom:16px;}
  .back-btn{padding:6px 11px;font-size:12px;}
  .editor-title h2{font-size:16px;}
  .editor-title p{font-size:11px;}

  .editor-body{grid-template-columns:1fr;gap:16px;}
  .config-panel{padding:16px;}
  .cfg-group{margin-bottom:16px;}
  .cfg-group>label{font-size:11px;margin-bottom:8px;}
  .cfg-group input[type="text"],.cfg-group input:not([type]){padding:9px 11px;font-size:13px;}
  .logo-slot{width:50px;height:50px;}
  .swatch{width:24px;height:24px;}
  .btn-primary{padding:13px 0;font-size:14px;letter-spacing:4px;}

  .preview-col{gap:14px;}
  .cover-card{padding:13px 13px 12px;}
  .cover-name{font-size:12px;}
  .cover-dims{font-size:10px;}
  .cover-stage{padding:8px;}
  .cover-stage.wide canvas{max-width:100%;}
  .cover-stage.portrait canvas{width:min(260px,76vw);}
  .export-btn{padding:11px 0;font-size:12px;margin-top:10px;}

  .scale-row{gap:8px;}
  .scale-label{font-size:10.5px;}
  .seg button{padding:6px 11px;font-size:11.5px;}
  .export-note{font-size:10px;}

  .toast{bottom:20px;font-size:12px;padding:9px 18px;max-width:92vw;}
}

/* ---------- image save overlay (mobile long-press) ---------- */
.save-overlay{
  position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:16px;padding:28px 24px;
  background:rgba(0,0,0,.92);backdrop-filter:blur(8px);
  opacity:0;pointer-events:none;transition:opacity .25s;
}
.save-overlay.show{opacity:1;pointer-events:auto;}
.save-overlay img{
  max-width:min(420px,86vw);max-height:60vh;border-radius:12px;
  box-shadow:0 20px 60px -16px rgba(0,0,0,.8);
}
.save-hint{
  color:#fff;font-size:14px;text-align:center;line-height:1.7;max-width:340px;
}
.save-hint b{color:var(--accent);font-weight:600;}
.save-close{
  margin-top:4px;padding:9px 28px;border-radius:999px;font-size:13px;
  background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.2);
  transition:background .18s;
}
.save-close:hover{background:rgba(255,255,255,.2);}

/* ---------- theme toggle ---------- */
.top-actions{display:flex;align-items:center;gap:12px;}
.theme-toggle{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  background:var(--panel);display:grid;place-items:center;color:var(--muted);
  transition:color .18s,border-color .18s,transform .18s;
}
.theme-toggle:hover{color:var(--accent);border-color:rgba(78,205,196,.5);transform:rotate(14deg);}
.theme-toggle svg{width:17px;height:17px;}
html.light .theme-toggle .icon-sun{display:none;}
html:not(.light) .theme-toggle .icon-moon{display:none;}

/* ---------- light mode refinements ---------- */
html.light body{
  background:
    radial-gradient(1200px 500px at 85% -10%,rgba(59,130,246,.05),transparent 60%),
    radial-gradient(900px 420px at -10% 0%,rgba(13,148,136,.05),transparent 55%),
    var(--bg);
}
html.light .topbar{background:rgba(255,255,255,.86);}
html.light .mark{background:linear-gradient(145deg,#FFFFFF,#EEF2F8);}
html.light ::-webkit-scrollbar-thumb{background:#C6CFDD;}
html.light .swatch{border-color:rgba(15,23,42,.15);}
html.light .theme-chip:not(.locked):hover,
html.light .mini-btn:hover,
html.light .back-btn:hover{border-color:#B9C3D5;}
html.light .theme-chip.active{
  box-shadow:0 0 0 1px rgba(13,148,136,.22),0 6px 18px -8px rgba(13,148,136,.28);
}
html.light .tpl-card:hover{box-shadow:0 18px 34px -18px rgba(23,43,77,.22);}
html.light .btn-primary{
  background:linear-gradient(135deg,#0D9488,#0BA298);color:#FFFFFF;
  box-shadow:0 10px 22px -10px rgba(13,148,136,.45);
}
html.light .btn-primary:hover{filter:brightness(1.06);}
html.light .toast{box-shadow:0 16px 40px -12px rgba(23,43,77,.35);}
html.light .theme-toggle:hover{border-color:rgba(13,148,136,.5);}

/* ---------- export scale ---------- */
.scale-row{display:flex;align-items:center;justify-content:center;gap:12px;}
.scale-label{font-size:11px;color:var(--muted);letter-spacing:1.5px;}
.seg{display:flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--panel);}
.seg button{padding:6px 14px;font-size:12px;color:var(--muted);transition:all .15s;}
.seg button:hover{color:var(--text);}
.seg button.active{background:var(--accent);color:var(--accent-deep);font-weight:600;}