:root{
  --bg:#1a1a1a;--surface:#232323;--raised:#2c2c2c;--border:#383838;--accent:#ff0075;--text:#fff;--muted:#a3a3a3;
  --radius:12px;--font:Inter,-apple-system,"Segoe UI",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
h1{font-size:1.6rem;line-height:1.2;margin:0 0 6px;letter-spacing:-.01em}
p{margin:0 0 12px}
.muted{color:var(--muted)}
.error{color:#ff6b9d;font-size:.92rem;margin:8px 0}
[hidden]{display:none!important}

.top{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.mark{width:22px;height:22px;border-radius:6px;background:var(--accent);display:inline-block}
.top-right{display:flex;align-items:center;gap:16px}
.tag{font-size:.8rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-weight:600}

main{min-height:calc(100vh - 57px)}
.screen{padding:32px 20px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;max-width:720px;margin:24px auto}
.card.narrow{max-width:440px;margin-top:9vh}

.btn{background:var(--raised);border:1px solid var(--border);border-radius:999px;padding:11px 20px;font-weight:600;cursor:pointer;transition:background .15s,transform .05s}
.btn:hover{background:#353535}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:#e6006a}
.btn.big{padding:14px 28px;font-size:1.05rem}
.btn.small{padding:8px 14px;font-size:.88rem}
.btn.ghost{background:transparent}
.btn:disabled{opacity:.45;cursor:not-allowed}
.link{background:none;border:0;color:var(--muted);text-decoration:underline;cursor:pointer;padding:6px 2px}
.link.small{font-size:.85rem}

.field{display:block;margin:0 0 14px}
.field>span:first-child{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input[type=text],.field input[type=date],.field input[type=number],.field textarea,.field select{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:11px 12px;outline:none;transition:border-color .15s}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent)}
.field textarea{resize:vertical;min-height:70px}
.field.invalid input,.field.invalid textarea,.field.invalid select{border-color:#ff6b9d}
.field .ferr{color:#ff6b9d;font-size:.82rem;margin-top:5px}
.field.inline{display:inline-block;width:calc(50% - 8px);vertical-align:top}
.field.inline+.field.inline{margin-left:16px}
.check{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--border);cursor:pointer}
.check:last-of-type{border-bottom:0;margin-bottom:12px}
.check input{margin-top:5px;accent-color:var(--accent);width:18px;height:18px;flex:0 0 18px}
#login-form .btn{width:100%;margin-top:6px}

.build{display:grid;grid-template-columns:minmax(360px,520px) 1fr;gap:28px;max-width:1440px;margin:0 auto;padding:28px 24px 60px}
.intro{margin-bottom:8px}
.qcard{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;margin:0 0 16px}
.qhead{display:flex;align-items:baseline;gap:12px;margin-bottom:4px}
.qn{display:inline-flex;align-items:center;justify-content:center;min-width:26px;height:26px;border-radius:8px;background:var(--accent);color:#fff;font-weight:700;font-size:.85rem;padding:0 8px}
.qlabel{font-weight:700;font-size:1.05rem}
.hint{color:var(--muted);font-size:.9rem;margin:0 0 14px}
.qcard .field:last-child{margin-bottom:0}
.form-foot{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:8px}

.brand-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.logo-drop{display:flex;align-items:center;justify-content:center;min-height:108px;border:1px dashed #555;border-radius:10px;padding:12px;cursor:pointer;text-align:center;color:var(--muted);font-size:.9rem;background:var(--bg)}
.logo-drop:hover{border-color:var(--accent)}
.logo-drop img{max-height:80px;max-width:100%;object-fit:contain;background:#fff;border-radius:6px;padding:6px}
.color-wrap{display:flex;gap:8px;align-items:center}
.color-wrap input[type=color]{width:44px;height:42px;padding:2px;border:1px solid var(--border);border-radius:8px;background:var(--bg);cursor:pointer}
.color-wrap input[type=text]{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-family:ui-monospace,Menlo,monospace}
.swatches{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}
.swatch{width:26px;height:26px;border-radius:50%;border:2px solid transparent;cursor:pointer}
.swatch:hover,.swatch.on{border-color:#fff}

.preview-col{position:sticky;top:77px;align-self:start;height:calc(100vh - 100px);display:flex;flex-direction:column;min-width:0}
.preview-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.tabs{display:flex;gap:4px;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:4px}
.tab{background:none;border:0;border-radius:999px;padding:7px 14px;color:var(--muted);font-weight:600;cursor:pointer;font-size:.9rem}
.tab.active{background:var(--accent);color:#fff}
.actions{display:flex;gap:8px}
.paper-wrap{flex:1;overflow:auto;background:#111;border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.paper{background:#fff;color:#1a1a1a;max-width:8.5in;margin:0 auto;padding:.8in;box-shadow:0 8px 40px rgba(0,0,0,.5);min-height:60vh;border-radius:2px}
.paper-empty{color:#1a1a1a;padding:40px 10px}
.paper-empty .muted{color:#666}
.paper .copy-btn{float:right;background:#fff;border:1px solid #ddd;border-radius:999px;padding:4px 10px;font-size:.78rem;color:#1a1a1a;cursor:pointer;margin:2px 0 0 10px}
.paper .copy-btn:hover{border-color:#1a1a1a}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#fff;color:#1a1a1a;padding:10px 18px;border-radius:999px;font-weight:600;box-shadow:0 6px 24px rgba(0,0,0,.4);z-index:20}

@media (max-width:980px){
  .build{grid-template-columns:1fr;padding:20px 16px 60px}
  .preview-col{position:static;height:auto}
  .paper-wrap{max-height:70vh}
  .paper{padding:24px 18px}
  .brand-row{grid-template-columns:1fr}
  .field.inline{display:block;width:100%}
  .field.inline+.field.inline{margin-left:0}
}
@media (max-width:600px){
  .screen{padding:20px 16px}
  .card{padding:20px}
  .top{padding:12px 16px}
  .tag{display:none}
  .preview-head{flex-direction:column;align-items:stretch}
  .tabs{justify-content:space-between}
  .tab{padding:7px 8px;font-size:.8rem;flex:1;text-align:center}
}