:root{--pink:#ed0084;--ink:#1c1c20;--muted:#76757c;--line:#e4e3e9;--cyan:#18b6cc;--yellow:#efbc32;--glass:rgba(255,255,255,.78)}
*{box-sizing:border-box}body{margin:0;color:var(--ink);font:14px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(ellipse at 2% 25%,#fff0f6,transparent 48%),radial-gradient(ellipse at 100% 15%,#fff8e5,transparent 45%),#f5f5f8}
button,input,select{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer;color:var(--ink);border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.85);padding:10px 12px;transition:background .2s,border-color .2s,box-shadow .2s,transform .2s}
button:hover:not(:disabled){border-color:#b9b7c2;box-shadow:0 4px 12px #23202c0c;transform:translateY(-1px)}button:active:not(:disabled){transform:translateY(0) scale(.985)}button:disabled{opacity:.35;cursor:not-allowed}
button:focus-visible,input:focus-visible,select:focus-visible,label:focus-visible,canvas:focus-visible,a:focus-visible{outline:3px solid #ed00844d;outline-offset:3px}a{color:inherit;text-decoration:none}
.topbar{max-width:1500px;margin:auto;padding:23px 4%;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;flex-shrink:0}.brand img{display:block;width:170px;height:67px;object-fit:contain}
.store-link{display:inline-flex;align-items:center;gap:15px;background:var(--ink);color:white;border-radius:13px;padding:12px 19px;font-size:11px;letter-spacing:.6px;font-weight:700;transition:transform .2s,background .2s}.store-link:hover{background:#3d3b43;transform:translateY(-1px)}.store-link span{font-size:17px}.top-caption{margin-left:auto;color:var(--muted);font-size:11px;letter-spacing:2px}
main{max-width:1500px;margin:auto;padding:15px 4% 48px}.workspace{display:grid;grid-template-columns:320px minmax(0,1fr);gap:26px;align-items:start}.controls{display:flex;flex-direction:column;gap:14px}.step-card,.preview-card,.export-card{background:var(--glass);border:1px solid #fff;border-radius:21px;box-shadow:0 3px 5px #30273203,0 12px 38px #30273205;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.step-card{padding:22px}h2{font-size:14px;margin:0 0 20px;display:flex;align-items:center;gap:10px;letter-spacing:-.2px}.step{display:inline-grid;place-items:center;width:28px;height:28px;flex-shrink:0;border-radius:9px;background:var(--ink);color:#fff;font-size:12px;font-weight:650}.count{font-size:11px;color:var(--muted);margin-left:auto}
.format-options{display:flex;gap:8px}.format{flex:1;display:flex;align-items:center;gap:10px;padding:13px 10px;text-align:left;font-size:13px}.format small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.format.active{background:#fff0f7;border:1px solid #ed0084;box-shadow:0 0 0 2px #ed00840b}.book-icon{display:block;border:1px solid #64606a;border-left:4px solid var(--pink);width:19px;height:27px;border-radius:2px;flex-shrink:0}.book-icon.square{width:23px;height:23px}
.upload{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;border:1.5px dashed #d2b5c5;border-radius:14px;background:linear-gradient(130deg,#fff8fc,#f8f8fb);padding:18px 8px;cursor:pointer;transition:border-color .2s,background .2s,transform .2s}.upload:hover,.upload.dragover{border-color:var(--pink);background:#fff0f7}.upload-icon{display:grid;place-items:center;background:white;border:1px solid #f0e6ec;color:var(--pink);font-size:24px;width:34px;height:34px;border-radius:11px;margin-bottom:4px}.upload strong{font-size:13px}.upload small{font-size:10px;color:var(--muted)}.upload[aria-disabled=true]{opacity:.4;pointer-events:none}
.layer-list{display:flex;flex-direction:column;gap:6px;max-height:220px;overflow-y:auto;margin-top:14px;padding:2px}.layer-select{display:flex;gap:10px;align-items:center;width:100%;padding:7px;text-align:left;min-width:0;border-radius:10px}.layer-select.active{border-color:var(--pink);background:#fff3f9}.layer-select img{width:39px;height:33px;object-fit:contain;flex-shrink:0;background:repeating-conic-gradient(#f1f1f4 0% 25%,#fff 0% 50%) 50%/10px 10px;border-radius:5px}.layer-select>span{min-width:0}.layer-select strong{display:block;font-size:11px;overflow-wrap:anywhere;line-height:1.3}.layer-select small{font-size:10px;color:var(--pink)}.layer-actions{display:flex;gap:5px;margin-top:10px}.layer-actions button{flex:1;font-size:10px;padding:7px 3px;border-radius:9px}
.slider-label{display:flex;justify-content:space-between;font-size:12px;margin:14px 0 9px}output{color:var(--muted);font-variant-numeric:tabular-nums}input[type=range]{width:100%;accent-color:var(--pink);margin:0;cursor:pointer}.tool-buttons{display:flex;gap:5px;margin:18px 0}.tool-buttons button{flex:1;font-size:10px;padding:8px 4px;border-radius:9px}.color-row{display:flex;align-items:center;justify-content:space-between;font-size:12px}.color-row input{border:1px solid var(--line);border-radius:8px;padding:3px;width:40px;height:29px;background:white;cursor:pointer}.hint{font-size:10px;line-height:1.6;color:var(--muted);margin:15px 0 0}
.field{display:flex;flex-direction:column;gap:7px;font-size:11px}.field input,.field select{width:100%;min-width:0;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.8);padding:10px 12px;color:var(--ink)}.step-card .field{margin-top:12px}.check{display:flex;align-items:center;gap:7px;font-size:11px;cursor:pointer}.check input{accent-color:var(--pink);width:14px;height:14px;cursor:pointer}.step-card .check{margin-top:12px;font-size:10px}
.stage-column{min-width:0}.preview-card{padding:18px}.stage-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:15px}.segmented{display:flex;gap:2px;padding:4px;border:1px solid #e6e4e9;background:#eeedf280;border-radius:13px}.segmented button{border:0;padding:8px 14px;background:transparent;font-size:12px;border-radius:9px}.segmented .selected{background:white;box-shadow:0 2px 6px #24202d0b}
.cover-dimensions{margin:0 0 16px}.dimensions-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:9px;font-size:11px}.dimensions-heading strong{font-weight:600}.dimensions-heading span{color:var(--muted);font-size:10px}.dimensions-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:0}.dimensions-grid>div{min-width:0;padding:12px 10px;border:1px solid var(--line);border-radius:11px;background:#ffffff80}.dimensions-grid dt{font-size:9px;letter-spacing:.8px;color:var(--muted);margin-bottom:5px}.dimensions-grid dd{font-size:12px;font-weight:600;font-variant-numeric:tabular-nums;margin:0;color:var(--ink)}.dimensions-grid .total-size{border-color:#e4cbd9;background:#fff3f980}.total-size dt{color:#a00059}.total-size small{display:block;font-size:9px;color:var(--muted);margin-top:3px}.fold-notice{display:flex;align-items:flex-start;gap:10px;padding:13px 14px;margin-top:15px;border:1px solid #ead7e0;border-radius:12px;background:#fff5f980;color:#63505a}.fold-notice>i{width:8px;height:8px;border-radius:50%;flex-shrink:0;margin-top:5px}.fold-notice strong{font-size:11px;font-weight:650;color:#563343}.fold-notice p{font-size:11px;line-height:1.65;margin:4px 0 0}@media(max-width:1250px){.dimensions-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.dimensions-grid>div{padding:11px 9px}.fold-notice{padding:12px}.dimensions-heading{font-size:11px}}
.stage{min-height:480px;display:flex;align-items:center;justify-content:center;padding:26px 21px 21px;border-radius:13px;border:1px solid #e4e2e9;background:radial-gradient(#d8d6df .7px,transparent .7px) 0 0/16px 16px,#eeeef4;overflow:hidden}.canvas-wrap{width:100%;max-width:980px}.ruler{text-align:center;font-size:10px;color:#83818b;margin:0 0 14px;font-variant-numeric:tabular-nums}.canvas-wrap canvas{display:block;width:100%;height:auto;background:white;box-shadow:0 8px 25px #28223712;cursor:grab;touch-action:none}.canvas-wrap canvas:active{cursor:grabbing}.panel-labels{display:flex;justify-content:space-between;padding:14px 12% 0;font-size:9px;letter-spacing:1.4px;color:#83818b}.panel-labels span:nth-child(2){font-size:8px}.legend{display:flex;justify-content:center;gap:22px;margin-top:15px;font-size:10px;color:var(--muted)}.legend span{display:flex;align-items:center;gap:6px}.legend i{height:6px;width:6px;border-radius:50%}.pink{background:var(--pink)}.yellow{background:var(--yellow)}.cyan{background:var(--cyan)}
.export-card{display:flex;align-items:end;gap:16px;padding:18px;margin-top:15px}.filename-field{flex:1}.filename-field input{font-size:12px}.actions{display:flex;gap:9px;flex-shrink:0}.primary{background:var(--pink);border-color:var(--pink);color:white;box-shadow:0 6px 18px #ed008420;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:17px;padding:11px 19px;font-size:12px}.primary:hover:not(:disabled){background:#d30075;border-color:#d30075;box-shadow:0 8px 24px #ed008430}.secondary{background:rgba(255,255,255,.8);font-size:12px;padding:11px 16px}.primary span{font-size:17px;line-height:1}
.closed-wrap{text-align:center}.book-preview{width:205px;max-width:65vw;margin:10px auto 26px;transform:perspective(900px) rotateY(-14deg) rotateZ(-3deg);border-radius:3px 6px 6px 3px;box-shadow:14px 17px 22px #18203233;background:#ddd;border-right:9px solid #f8f4eb;border-bottom:5px solid #ece7dc}.book-preview canvas{width:100%;display:block;border-left:7px solid #0002}.preview-switch{display:flex;gap:7px;justify-content:center}.preview-switch button{font-size:11px;padding:6px 13px}.preview-switch .selected{color:var(--pink);border-color:var(--pink)}
footer{border-top:1px solid #e6e4eb;text-align:center;padding:27px 4% 24px;color:var(--muted);font-size:10px;background:#ffffff50}footer nav{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin-bottom:15px}footer a{font-size:11px;color:#55525d;transition:color .2s}footer a:hover{color:var(--pink)}footer p{margin:0;line-height:1.8}
dialog{max-width:410px;width:calc(100% - 36px);padding:29px;border:1px solid white;border-radius:24px;background:rgba(255,255,255,.94);box-shadow:0 24px 100px #21182b30;color:var(--ink);backdrop-filter:blur(22px)}dialog::backdrop{background:#23182b55;backdrop-filter:blur(6px)}dialog h2{font-size:21px;margin:14px 0 10px}dialog p{font-size:13px;color:var(--muted);line-height:1.7;margin:0 0 23px}.dialog-icon{width:38px;height:38px;border-radius:12px;background:#fff1d4;color:#886300;display:grid;place-items:center;font-size:22px;font-weight:700}.dialog-actions{display:flex;gap:9px;justify-content:flex-end}.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);max-width:90vw;background:#24212be8;backdrop-filter:blur(16px);color:#fff;box-shadow:0 10px 35px #24182b20;border-radius:14px;padding:12px 19px;font-size:12px;z-index:5}.hidden{display:none!important}
@media(max-width:1050px){.workspace{grid-template-columns:280px minmax(0,1fr);gap:18px}.step-card{padding:18px}.export-card{flex-direction:column;align-items:stretch}.actions{justify-content:flex-end}.stage{min-height:400px;padding:22px 14px}.stage-toolbar{flex-wrap:wrap}.top-caption{font-size:10px}}
@media(max-width:720px){.topbar{padding:18px 5%;gap:14px;flex-wrap:wrap}.brand img{width:138px;height:54px}.store-link{padding:10px 13px;font-size:9px;gap:8px;margin-left:auto}.top-caption{width:100%;margin:0;text-align:center;font-size:9px;letter-spacing:2.2px}main{padding:4px 4% 30px}.workspace{display:flex;flex-direction:column;gap:18px}.controls,.stage-column{width:100%}.controls{gap:10px}.step-card{padding:18px}.step-card h2{margin-bottom:15px}.upload{padding:14px}.layer-list{max-height:185px}.adjustments .hint{font-size:11px}.tool-buttons button,.layer-actions button{font-size:11px}.stage{min-height:255px;padding:22px 12px}.preview-card{padding:12px}.stage-toolbar{gap:8px}.segmented button{font-size:11px;padding:7px 10px}.check{font-size:10px}.export-card{padding:15px;gap:14px}.actions button{flex:1}.legend{gap:18px;font-size:9px}.ruler{font-size:9px}.panel-labels{padding:12px 6% 0}footer nav{gap:15px}footer a{font-size:10px}footer{font-size:9px}.dialog-actions button{flex:1;padding:11px 10px}}
.resize-hint{font-size:10px;line-height:1.6;color:var(--muted);margin:7px 0 0}@media(max-width:720px){.resize-hint{font-size:11px}}
.alignment-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px;margin:-9px 0 18px}.alignment-buttons button{font-size:10px;line-height:1.45;padding:7px 4px;border-radius:9px}@media(max-width:720px){.alignment-buttons button{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}