:root{
  --mint:#10b981; --mint-d:#059669; --ink:#0f2f26; --ink-2:#4b5f58;
  --bg:#f4f7f5; --panel:#ffffff; --line:#e2ece7; --soft:#f0f5f2;
  --shadow:0 1px 3px rgba(16,60,45,.06),0 8px 24px rgba(16,60,45,.06);
  --radius:12px; --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit}

/* header */
.top{display:flex;align-items:center;gap:14px;padding:10px 18px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand .dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--mint),var(--mint-d));display:inline-block;position:relative}
.brand .dot::after{content:"";position:absolute;inset:6px 6px auto auto;width:6px;height:6px;border-radius:50%;background:#fff}
.brand small{font-weight:600;color:var(--ink-2);font-size:12px;letter-spacing:0}
.top .sp{flex:1}
.top button{border:1px solid var(--line);background:#fff;color:var(--ink);padding:7px 12px;border-radius:9px;font-weight:600;font-size:13px}
.top button:hover{border-color:var(--mint)}
#buyBtn{background:var(--mint);color:#fff;border-color:var(--mint)}
#buyBtn:hover{background:var(--mint-d)}
#proBadge{display:none;background:var(--soft);color:var(--mint-d);border:1px solid var(--mint);border-radius:20px;padding:5px 12px;font-weight:700;font-size:12px}
.ghost{background:transparent!important;border:none!important;color:var(--ink-2)!important;padding:7px 8px!important}

/* layout */
.wrap{display:grid;grid-template-columns:380px 1fr 240px;gap:0;height:calc(100vh - 53px)}
@media(max-width:1100px){.wrap{grid-template-columns:1fr;height:auto;overflow:auto}}
.side{border-right:1px solid var(--line);background:var(--panel);overflow:auto}
.center{display:flex;flex-direction:column;background:var(--bg);min-height:0}
.rail{border-left:1px solid var(--line);background:var(--panel);overflow:auto;padding:16px}

/* tabs */
.tabs{display:flex;gap:4px;padding:12px 14px 0}
.tab{flex:1;border:none;background:transparent;color:var(--ink-2);font-weight:700;font-size:13px;padding:9px 6px;border-radius:9px 9px 0 0;border-bottom:2px solid transparent}
.tab.on{color:var(--ink);border-bottom-color:var(--mint);background:var(--soft)}
.panel{display:none;padding:14px}
.panel.on{display:block}

/* form */
.grp{margin-bottom:16px}
.grp.cols2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.lbl{display:block;font-weight:700;font-size:12.5px;margin:0 0 5px;color:var(--ink)}
.lbl .opt{font-weight:500;color:var(--ink-2);font-size:11px}
input[type=text],input:not([type]),textarea,select{width:100%;border:1px solid var(--line);border-radius:9px;padding:9px 11px;font-size:13.5px;color:var(--ink);background:#fff;outline:none}
input:focus,textarea:focus,select:focus{border-color:var(--mint);box-shadow:0 0 0 3px rgba(16,185,129,.12)}
textarea{resize:vertical;line-height:1.4}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ck{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink-2);font-weight:600;white-space:nowrap}
.ck input{width:auto}
.hint{font-size:11.5px;line-height:1.5;color:var(--ink-2);background:var(--soft);border-radius:8px;padding:8px 10px;margin:8px 0 0}
.mini{border:1px dashed var(--line);background:#fff;color:var(--ink-2);border-radius:8px;padding:6px 10px;font-size:12px;font-weight:600}
.mini:hover{border-color:var(--mint);color:var(--mint-d)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{border:1px solid var(--line);background:#fff;border-radius:20px;padding:6px 12px;font-size:12.5px;font-weight:600;color:var(--ink-2)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}

/* size + theme grids */
.szgrid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px}
.szchip{display:flex;flex-direction:column;align-items:center;gap:5px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 4px;font-size:11px;font-weight:600;color:var(--ink-2)}
.szchip.on{border-color:var(--mint);background:var(--soft);color:var(--ink)}
.szshape{width:22px;height:22px;border:2px solid currentColor;opacity:.7}
.szshape.round{border-radius:50%}
.szshape.square{border-radius:3px}
.szshape.rect{border-radius:3px;height:15px;margin-top:4px}
.thgrid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.thchip{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px;font-size:12.5px;font-weight:600;color:var(--ink)}
.thchip.on{border-color:var(--mint);box-shadow:0 0 0 2px rgba(16,185,129,.15)}
.thchip .sw{width:20px;height:20px;border-radius:6px;background:var(--tb);border:2px solid var(--ta);position:relative;flex:none}
.thchip .sw::after{content:"";position:absolute;inset:5px;border-radius:2px;background:var(--tf);opacity:.5}
input[type=color]{width:44px;height:34px;padding:2px;border-radius:8px;border:1px solid var(--line);background:#fff}

/* preview */
.pvhead{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--line);background:var(--panel)}
.pvhead .t{font-weight:700;font-size:14px}
#sizeMeta{font-size:12px;color:var(--ink-2)}
#previewBox{flex:1;display:flex;align-items:center;justify-content:center;padding:24px;min-height:340px;
  background:
    linear-gradient(45deg,#eef3f0 25%,transparent 25%),linear-gradient(-45deg,#eef3f0 25%,transparent 25%),
    linear-gradient(45deg,transparent 75%,#eef3f0 75%),linear-gradient(-45deg,transparent 75%,#eef3f0 75%);
  background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0}
#preview{filter:drop-shadow(0 10px 30px rgba(16,60,45,.18));border-radius:4px;max-width:100%;max-height:100%}
.pvfoot{padding:14px 18px;border-top:1px solid var(--line);background:var(--panel);display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.pvfoot .exp{display:flex;gap:8px}
.exp button{border:1px solid var(--mint);background:var(--mint);color:#fff;font-weight:700;font-size:13px;padding:9px 16px;border-radius:9px}
.exp button.alt{background:#fff;color:var(--mint-d)}
.exp button:hover{filter:brightness(1.05)}
#exportNote{font-size:11.5px;color:var(--ink-2);flex:1;min-width:180px}

/* rail */
.rail h4{margin:2px 0 8px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-2)}
.compcard{background:var(--soft);border-radius:12px;padding:14px;margin-bottom:16px}
.compcard .score{font-size:22px;font-weight:800;color:var(--mint-d)}
.compcard .score small{font-size:12px;color:var(--ink-2);font-weight:600}
#compliance{list-style:none;margin:10px 0 0;padding:0;font-size:12.5px}
#compliance li{padding:4px 0;color:var(--ink-2);font-weight:600}
#compliance li.ok{color:var(--mint-d)}
.disc{font-size:10.5px;line-height:1.5;color:var(--ink-2);border-top:1px solid var(--line);padding-top:12px}
.ck2{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2);font-weight:600;margin-bottom:14px}
.railbuy{background:linear-gradient(135deg,#ecfdf5,#f0fdf9);border:1px solid var(--mint);border-radius:12px;padding:14px;margin-bottom:16px}
.railbuy b{font-size:14px}
.railbuy p{font-size:11.5px;color:var(--ink-2);margin:4px 0 10px;line-height:1.5}
.railbuy button{width:100%;background:var(--mint);color:#fff;border:none;border-radius:9px;padding:10px;font-weight:700}
.railbuy button:hover{background:var(--mint-d)}
.railbuy .lnk{display:block;text-align:center;margin-top:8px;font-size:11.5px;color:var(--mint-d);background:none;border:none;width:100%}
body.pro .railbuy{display:none}