:root{
  --bg:#f6f6f6; --card:#ffffff; --card2:#fafafa; --ink:#232323; --sub:#6f6f6f;
  --line:#e3e3e3; --soft:#f0f0f0; --hover:#ebebeb;
  --accent:#a32135; --accent-ink:#ffffff; --accent-soft:#f8e9eb; --accent-hot:#ff214f;
  --bar:#232323; --bar-ink:#ffffff; --bar-sub:#cbcbcb;
  --ok:#2f8a46; --bad:#c43d2b; --warn:#a86b0c;
  --canvas:#e9e9e9; --shadow:0 1px 2px rgba(28,27,25,.05),0 4px 16px rgba(28,27,25,.06);
  --radius:10px; --top:58px;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --bg:#1b1b1f; --card:#25252b; --card2:#2b2b32; --ink:#ececf0; --sub:#a3a3ad;
  --line:#3a3a43; --soft:#2f2f37; --hover:#35353e;
  --accent:#ff4d6d; --accent-ink:#1a0a0d; --accent-soft:#3a1e24; --accent-hot:#ff214f;
  --bar:#0f0f0f; --bar-ink:#ffffff; --bar-sub:#a3a3ad;
  --ok:#6cc583; --bad:#ff8a78; --warn:#f2b55c;
  --canvas:#141417; --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font:14px/1.5 'Roboto',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
button,input,select,textarea{font:inherit;color:inherit}
.hidden{display:none!important}
h1,h2,.page-head h1,.modal h2{font-family:'Montserrat','Roboto',sans-serif}
h1{font-size:clamp(1.3rem,1.1rem + .6vw,1.65rem);font-weight:650;letter-spacing:-.01em;margin:0 0 .2rem}
h2{font-size:1.15rem;font-weight:650;margin:0 0 .8rem}

/* buttons + fields */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;font-family:'Montserrat','Roboto',sans-serif;font-size:.8rem;font-weight:600;letter-spacing:.01em;padding:.55rem .95rem;border-radius:8px;border:1px solid var(--line);background:var(--card);cursor:pointer;white-space:nowrap;transition:background .12s,border-color .12s}
.btn:hover{background:var(--hover)}
.btn:disabled{opacity:.45;cursor:default}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:var(--accent);filter:brightness(1.12)}
.btn-bad{color:var(--bad)}
.btn-bad:hover{border-color:var(--bad)}
.btn-sm{padding:.32rem .6rem;font-size:.76rem;border-radius:6px}
.icon-btn{background:none;border:1px solid transparent;border-radius:6px;padding:.3rem .45rem;cursor:pointer;color:var(--sub);line-height:1}
.icon-btn:hover{color:var(--ink);background:var(--soft)}
label.f{display:block;font-size:.78rem;font-weight:600;color:var(--sub);margin:0 0 .3rem}
.in{width:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:.55rem .7rem;outline:none;transition:border-color .12s,box-shadow .12s}
.in:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
textarea.in{resize:vertical;min-height:4.2rem}
.field{margin-bottom:.95rem}
.row{display:flex;gap:.6rem;align-items:center}
.row > *{min-width:0}
.grow{flex:1}
.muted{color:var(--sub)}
.small{font-size:.8rem}
input[type=color]{width:2.5rem;height:2.25rem;padding:.2rem;border:1px solid var(--line);border-radius:8px;background:var(--card);flex:none;cursor:pointer}
input[type=checkbox]{accent-color:var(--accent);width:1rem;height:1rem}
input[type=range]{accent-color:var(--accent)}

/* shell */
.top{display:flex;align-items:center;gap:1rem;height:var(--top);padding:0 clamp(12px,2.5vw,32px);background:var(--bar);color:var(--bar-ink);position:sticky;top:0;z-index:20;box-shadow:inset 0 -3px 0 var(--accent)}
.brand{display:flex;align-items:center;gap:.75rem;cursor:pointer;white-space:nowrap}
.brand .logo{height:32px;width:auto;display:block}
.brand .app-name{font-family:'Montserrat','Roboto',sans-serif;font-weight:600;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;padding-left:.75rem;border-left:1px solid rgba(255,255,255,.25);color:var(--bar-sub)}
.top .logo-dark{display:none}
.auth .logo-light,:root[data-theme="dark"] .auth .logo-dark{display:none}
:root[data-theme="dark"] .auth .logo-light{display:block}
.auth .brand{flex-direction:column;gap:.9rem}
.auth .brand .logo{height:64px}
.auth .brand .app-name{border-left:0;padding-left:0;color:var(--sub)}
.nav{display:flex;gap:.15rem;margin-left:.75rem}
.nav button{background:none;border:0;color:var(--bar-sub);padding:.45rem .75rem;border-radius:8px;cursor:pointer;font-size:.88rem;font-weight:500}
.nav button:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav button.active{color:#fff;background:var(--accent)}
.top .right{margin-left:auto;display:flex;align-items:center;gap:.75rem}
.avatar{width:2.1rem;height:2.1rem;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;cursor:pointer;position:relative;flex:none}
.menu{position:absolute;top:calc(100% + .45rem);right:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);min-width:13rem;padding:.35rem;box-shadow:var(--shadow);z-index:30;color:var(--ink)}
.menu button{display:block;width:100%;text-align:left;background:none;border:0;padding:.5rem .65rem;border-radius:6px;cursor:pointer;font-size:.85rem;font-weight:400}
.menu button:hover{background:var(--soft)}
.menu .who{padding:.45rem .65rem .6rem;border-bottom:1px solid var(--line);margin-bottom:.3rem;font-size:.8rem;color:var(--sub);font-weight:400}
main{padding:clamp(16px,2.5vw,36px) clamp(12px,2.5vw,32px) 4rem;max-width:1760px;margin:0 auto}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:1.4rem;flex-wrap:wrap}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}

/* library */
.filters{display:flex;gap:.6rem;margin-bottom:1.1rem;flex-wrap:wrap}
.filters .in{max-width:20rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:clamp(12px,1.4vw,20px)}
.tile{cursor:pointer;overflow:hidden;display:flex;flex-direction:column;transition:transform .12s,box-shadow .12s}
.tile:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(28,27,25,.12)}
.tile .thumb{aspect-ratio:4/3;background:var(--canvas) center top/cover no-repeat;border-bottom:1px solid var(--line)}
.tile .meta{padding:.8rem .9rem .9rem}
.tile .name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tile .sub{font-size:.78rem;color:var(--sub);margin-top:.25rem}
.tag{display:inline-block;font-size:.7rem;font-weight:600;padding:.12rem .45rem;border-radius:5px;background:var(--accent-soft);color:var(--accent)}
.empty{padding:3.5rem 1.5rem;text-align:center;color:var(--sub)}

/* editor */
.editor > *{min-width:0}
.editor{display:grid;grid-template-columns:minmax(300px,380px) minmax(0,1fr);gap:clamp(12px,1.5vw,24px);align-items:start}
@media (min-width:1600px){.editor{grid-template-columns:440px minmax(0,1fr)}}
.panel{padding:1rem 1.15rem 1.2rem}
.panel h3{margin:1.2rem 0 .75rem;font-size:.72rem;letter-spacing:.07em;text-transform:uppercase;color:var(--sub);font-weight:700}
.side{position:sticky;top:calc(var(--top) + 16px);max-height:calc(100vh - var(--top) - 32px);overflow:auto;border-radius:var(--radius)}
.tabs{display:flex;gap:.2rem;border-bottom:1px solid var(--line);margin:-.25rem -1.15rem 1rem;padding:0 .7rem;position:sticky;top:-1rem;background:var(--card);z-index:2}
.tabs button{background:none;border:0;border-bottom:2px solid transparent;color:var(--sub);padding:.75rem .65rem .6rem;cursor:pointer;font-size:.86rem;font-weight:500}
.tabs button.active{color:var(--ink);border-bottom-color:var(--accent)}
.stage{padding:clamp(12px,2vw,28px);background:var(--canvas);border-radius:var(--radius);border:1px solid var(--line);min-height:calc(100vh - var(--top) - 150px)}
.stage-bar{display:flex;align-items:center;gap:.6rem;margin-bottom:.8rem;flex-wrap:wrap}
.seg{display:inline-flex;background:var(--soft);border-radius:8px;padding:3px;gap:2px}
.seg button{background:none;border:0;padding:.35rem .75rem;cursor:pointer;color:var(--sub);font-size:.8rem;font-weight:500;border-radius:6px}
.seg button.active{background:var(--card);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.1)}
.save-state{font-size:.8rem;color:var(--sub)}
.top .save-state{color:var(--bar-sub)}
.save-state.bad{color:var(--bad)}
.devices{display:flex;gap:clamp(16px,2vw,40px);justify-content:center;align-items:flex-start;flex-wrap:wrap}
.device{display:flex;flex-direction:column;align-items:center;gap:.5rem;max-width:100%}
.device .lbl{font-size:.75rem;color:var(--sub)}

/* blocks on the stage */
.mail{margin:0 auto;position:relative;box-shadow:0 2px 18px rgba(0,0,0,.12);max-width:100%}
.blk{position:relative;outline:2px solid transparent;outline-offset:-2px;cursor:pointer}
.blk:hover{outline-color:color-mix(in srgb,var(--accent) 55%,transparent)}
.blk.sel{outline-color:var(--accent);z-index:2}
.blk img{display:block;width:100%;height:auto}
.blk .badge{position:absolute;top:.4rem;left:.4rem;background:rgba(20,20,24,.72);color:#fff;font-size:.68rem;padding:.12rem .45rem;border-radius:4px;pointer-events:none}
.blk .warn{position:absolute;top:.4rem;right:.4rem;background:var(--bad);color:#fff;font-size:.68rem;padding:.12rem .45rem;border-radius:4px;pointer-events:none}
.blk .linkdot{position:absolute;bottom:.4rem;right:.4rem;background:rgba(20,20,24,.72);color:#fff;font-size:.66rem;padding:.12rem .45rem;border-radius:4px;pointer-events:none;max-width:70%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.insert{display:flex;justify-content:center;align-items:center;gap:.35rem;height:0;position:relative;z-index:5;opacity:0;transition:opacity .15s;flex-wrap:nowrap}
.mail:hover .insert,.insert:focus-within{opacity:1}
.insert button{font-size:.7rem;padding:.22rem .55rem;border-radius:999px;border:1px solid var(--line);background:var(--card);cursor:pointer;color:var(--sub);box-shadow:0 2px 8px rgba(0,0,0,.18);white-space:nowrap}
.insert button:hover{color:var(--accent);border-color:var(--accent)}
@media (hover:none){.insert{opacity:1}}
.dropzone{border:2px dashed var(--line);border-radius:var(--radius);padding:clamp(2rem,6vw,4.5rem) 1.5rem;text-align:center;color:var(--sub);cursor:pointer;background:var(--card);max-width:760px;margin:clamp(0px,4vh,48px) auto}
.dropzone:hover,.dropzone.over{border-color:var(--accent);color:var(--ink)}
.dropzone b{color:var(--ink);display:block;font-size:1.1rem;margin-bottom:.35rem}
.checks{list-style:none;margin:0;padding:0;font-size:.86rem}
.checks li{padding:.32rem 0;display:flex;gap:.55rem}
.checks li::before{flex:none;width:1.1rem;text-align:center;font-weight:700}
.checks .ok::before{content:'✓';color:var(--ok)}
.checks .no::before{content:'!';color:var(--bad)}
.checks .wn::before{content:'•';color:var(--warn)}
pre.code{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:.85rem;font:12px/1.45 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;overflow:auto;white-space:pre-wrap;word-break:break-all;margin:0}
iframe.preview{border:0;background:#fff;display:block;max-width:100%;box-shadow:0 2px 18px rgba(0,0,0,.12)}
.callout{background:var(--accent-soft);border-radius:8px;padding:.75rem .85rem;font-size:.84rem;margin:.6rem 0 1rem}
.callout b{color:var(--ink)}
.callout.warn{background:color-mix(in srgb,var(--warn) 14%,var(--card))}
.callout code{font-size:.8em}
ol.steps{margin:.2rem 0 1rem;padding-left:1.3rem;font-size:.88rem}
ol.steps li{margin:.35rem 0;padding-left:.2rem}
ol.steps kbd,.guide kbd{font:600 .74rem ui-monospace,Menlo,Consolas,monospace;background:var(--soft);border:1px solid var(--line);border-bottom-width:2px;border-radius:4px;padding:.05rem .32rem}

/* guide page */
.guide > *{min-width:0}
.guide{display:grid;grid-template-columns:240px minmax(0,1fr);gap:clamp(16px,2vw,32px);align-items:start}
.guide-nav{position:sticky;top:calc(var(--top) + 16px);padding:.5rem}
.guide-nav button{display:block;width:100%;text-align:left;background:none;border:0;padding:.5rem .7rem;border-radius:6px;cursor:pointer;color:var(--sub);font-size:.88rem}
.guide-nav button:hover{background:var(--soft);color:var(--ink)}
.guide-nav button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.guide-nav .grp{font-size:.7rem;letter-spacing:.07em;text-transform:uppercase;color:var(--sub);font-weight:700;padding:.8rem .7rem .3rem}
.guide-body{padding:clamp(18px,2.5vw,36px);max-width:960px}
.guide-body h2{font-size:1.35rem}
.guide-body h3{font-size:1rem;margin:1.6rem 0 .5rem}
.guide-body p,.guide-body li{font-size:.92rem}
.guide-body ol.steps li{font-size:.92rem;margin:.5rem 0}
.guide-select{display:none;margin-bottom:1rem}

/* slicer */
.overlay{position:fixed;inset:0;background:var(--bg);z-index:50;display:flex;flex-direction:column}
.overlay .bar{display:flex;align-items:center;gap:.6rem;padding:.7rem clamp(12px,2vw,24px);border-bottom:1px solid var(--line);background:var(--card);flex-wrap:wrap}
.overlay .body{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 320px;min-height:0}
.slice-view{overflow:auto;background:var(--canvas);padding:clamp(12px,2.5vw,32px) clamp(40px,4vw,64px);position:relative}
.slice-wrap{position:relative;margin:0 auto;user-select:none;cursor:crosshair;box-shadow:0 4px 30px rgba(0,0,0,.25);touch-action:none}
.slice-wrap canvas{display:block;width:100%;height:auto}
.shade{position:absolute;background:rgba(20,20,24,.55);pointer-events:none}
.cut{position:absolute;left:0;right:0;height:0;border-top:2px solid #ff5a36;cursor:ns-resize}
.cut::before{content:'';position:absolute;left:0;right:0;top:-8px;height:16px}
.cut .lab{position:absolute;left:-.1rem;top:-.78rem;transform:translateX(-100%);background:#ff5a36;color:#fff;font-size:.66rem;padding:.1rem .38rem;border-radius:4px 0 0 4px;white-space:nowrap}
.cut .x{position:absolute;right:-.1rem;top:-.78rem;transform:translateX(100%);background:#ff5a36;color:#fff;border:0;font-size:.74rem;line-height:1;padding:.2rem .42rem;border-radius:0 4px 4px 0;cursor:pointer}
.edge{position:absolute;background:transparent}
.edge.h{left:0;right:0;height:0;border-top:2px dashed #1f9bff;cursor:ns-resize}
.edge.v{top:0;bottom:0;width:0;border-left:2px dashed #1f9bff;cursor:ew-resize}
.edge.h::before{content:'';position:absolute;left:0;right:0;top:-8px;height:16px}
.edge.v::before{content:'';position:absolute;top:0;bottom:0;left:-8px;width:16px}
.slice-side{border-left:1px solid var(--line);padding:1.1rem 1.2rem;overflow:auto;background:var(--card)}
.slice-list{list-style:none;padding:0;margin:0;font-size:.82rem}
.slice-list li{display:flex;justify-content:space-between;padding:.35rem 0;border-bottom:1px solid var(--line)}
.progress{height:4px;background:var(--soft);border-radius:2px;overflow:hidden}
.progress i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}

/* modal + toast */
.modal-back{position:fixed;inset:0;background:rgba(20,20,24,.45);z-index:60;display:flex;align-items:center;justify-content:center;padding:1rem}
.modal{width:100%;max-width:30rem;padding:1.4rem;max-height:calc(100vh - 2rem);overflow:auto}
.modal .acts{display:flex;justify-content:flex-end;gap:.5rem;margin-top:1.1rem}
.toast{position:fixed;bottom:1.2rem;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:.65rem 1rem;border-radius:8px;z-index:80;box-shadow:var(--shadow);font-size:.86rem;max-width:calc(100vw - 2rem)}
.toast.bad{background:var(--bad);color:#fff}
.toast .progress{background:rgba(255,255,255,.25)}

/* tables */
.table-wrap{overflow:auto}
table.t{width:100%;border-collapse:collapse;font-size:.88rem}
table.t th{text-align:left;font-size:.74rem;color:var(--sub);font-weight:600;padding:.7rem .9rem;border-bottom:1px solid var(--line);background:var(--card2)}
table.t td{padding:.75rem .9rem;border-bottom:1px solid var(--line)}
table.t tr:last-child td{border-bottom:0}

/* login */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1rem}
.auth .card{width:100%;max-width:25rem;padding:2.2rem}
.auth .brand{margin-bottom:1.8rem;justify-content:center;cursor:default}
.auth .card{border-top:4px solid var(--accent)}
.err{color:var(--bad);font-size:.84rem;min-height:1.2em;margin:.2rem 0 .6rem}

/* responsive */
@media (max-width:1100px){
  .overlay .body{grid-template-columns:minmax(0,1fr) 260px}
}
@media (max-width:900px){
  .editor{grid-template-columns:minmax(0,1fr)}
  .side{position:static;max-height:none;order:2}
  .tabs{position:static}
  .stage{min-height:0}
  .overlay .body{grid-template-columns:1fr;grid-template-rows:minmax(0,1fr) auto}
  .slice-side{border-left:0;border-top:1px solid var(--line);max-height:34vh}
  .guide{grid-template-columns:minmax(0,1fr)}
  .guide-nav{display:none}
  .guide-select{display:block}
}
@media (max-width:640px){
  .nav{margin-left:0}
  .nav button{padding:.4rem .5rem;font-size:.82rem}
  .brand .app-name{display:none}
  .brand .logo{height:26px}
  .save-state{display:none}
  .page-head .row{flex-wrap:wrap}
  .overlay .bar .hint{display:none}
  .slice-view{padding:12px 36px}
  .grid{grid-template-columns:1fr 1fr}
  .tile .meta .row{flex-wrap:wrap}
}
@media (max-width:420px){.grid{grid-template-columns:1fr}}