:root{--panel:#fff;--line:#dbe3ec;--ink:#102548;--muted:#66758d;--blue:#2e67c8;--blue-soft:#eef4ff;--shadow:0 16px 38px rgba(18,37,72,.08)}
*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#f9fbfd 0%,#edf3f8 100%);color:var(--ink)}
.page-shell{max-width:1600px;margin:0 auto;padding:18px}.hero{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:18px}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.12em;color:#6b7c90;margin-bottom:6px;text-transform:uppercase}.hero h1{margin:0;font-size:clamp(2rem,2.8vw,3rem);line-height:1.04}.hero p{margin:10px 0 0;color:var(--muted);line-height:1.45;max-width:850px}.btn{appearance:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:13px;padding:12px 16px;font-size:.95rem;font-weight:700;cursor:pointer;box-shadow:var(--shadow)}.btn:hover{border-color:var(--blue)}
.layout{display:grid;grid-template-columns:minmax(280px,330px) 1fr minmax(280px,330px);gap:18px;align-items:start}.panel{background:var(--panel);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:18px}.preview-panel{padding:16px 16px 10px}
.section-title{display:flex;align-items:center;gap:10px;margin-bottom:12px}.section-title span{display:grid;place-items:center;width:30px;height:30px;border-radius:999px;background:#103d7f;color:#fff;font-size:.92rem;font-weight:800}.section-title h2{margin:0;font-size:1.08rem;line-height:1.2}.divider{margin-top:18px;padding-top:18px;border-top:1px solid #e7edf2}
.swatch-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.swatch{border:1px solid var(--line);background:#fff;border-radius:14px;padding:8px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:7px;min-height:82px}.swatch:hover,.swatch.active{border-color:var(--blue);background:var(--blue-soft)}.swatch-color{width:100%;height:40px;border-radius:10px;border:1px solid rgba(0,0,0,.08)}.swatch-label{font-size:.72rem;font-weight:700;text-align:center}
.help{font-size:.78rem;color:var(--muted);line-height:1.45;margin:12px 0 2px}
.range-group{display:block;margin-top:14px}.range-group span{display:flex;justify-content:space-between;gap:10px;font-size:.84rem;margin-bottom:8px}.range-group output{font-weight:800;color:#153f7a}input[type=range]{width:100%;accent-color:var(--blue)}.range-labels{display:flex;justify-content:space-between;color:var(--muted);font-size:.72rem;margin-top:4px}
.placement-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.placement-grid button{border:1px solid var(--line);background:#fff;border-radius:11px;padding:11px 8px;cursor:pointer;font-size:.8rem;font-weight:700;color:var(--ink)}.placement-grid button:hover,.placement-grid button.active{border-color:var(--blue);background:var(--blue-soft);color:#174ca6}
.preview-head{display:flex;justify-content:space-between;align-items:center;padding:2px 4px 10px;font-size:.88rem;color:var(--muted)}.preview-head strong{color:var(--ink)}.muted{font-size:.78rem}
.preview-stage{position:relative;max-width:820px;margin:0 auto;aspect-ratio:1/1;background:radial-gradient(circle at 50% 30%, #ffffff 0%, #f5f7fa 50%, #edf1f6 100%);border-radius:18px;overflow:hidden}.shirt-base{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;filter:brightness(1)}
.logo-overlay{position:absolute;left:50%;top:42%;width:34%;height:auto;transform:translate(-50%,-50%);cursor:grab;user-select:none;-webkit-user-drag:none;filter:drop-shadow(0 3px 4px rgba(0,0,0,.14))}.logo-overlay:active{cursor:grabbing}
.print-guide{position:absolute;left:32%;top:23%;width:36%;height:36%;border:3px dashed rgba(61,120,223,.85);border-radius:10px;opacity:0;pointer-events:none}.drag-hint{text-align:center;color:var(--muted);font-size:.82rem;margin:10px 0 0}
.check-row{display:flex;align-items:center;gap:9px;font-size:.84rem}.note-box{margin-top:13px;background:#f7f9fc;border:1px solid var(--line);border-radius:13px;padding:12px}.note-box strong{display:block;margin-bottom:6px}.note-box p{margin:0;color:#384764;font-size:.78rem;line-height:1.45}.summary-box h3{margin:0 0 10px;font-size:.95rem}.summary-box dl{margin:0}.summary-box dl div{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-top:1px solid #e7edf2;font-size:.8rem}.summary-box dl div:first-child{border-top:0}.summary-box dt{color:var(--muted)}.summary-box dd{margin:0;font-weight:700}
@media(max-width:1180px){.layout{grid-template-columns:1fr 1fr}.preview-panel{grid-column:1/-1;order:-1}}
@media(max-width:760px){.page-shell{padding:13px}.hero{flex-direction:column}.btn{width:100%}.layout{grid-template-columns:1fr;gap:13px}.preview-panel{order:0}.panel{padding:16px;border-radius:18px}.hero h1{font-size:1.85rem}.hero p{font-size:.92rem}.swatch-grid{grid-template-columns:repeat(4,1fr)}.swatch{min-height:68px}.swatch-color{height:34px}.swatch-label{font-size:.67rem}.preview-stage{border-radius:14px}}
@media(max-width:430px){.swatch-grid{grid-template-columns:repeat(3,1fr)}}