:root{color-scheme:light;--ink:#252925;--muted:#5b625c;--paper:#fbf9f6;--warm:#f1eee8;--line:#ddd8cf;--orange:#a93d03}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.5 Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:inherit}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid #c5551a;outline-offset:3px}
.header{border-bottom:1px solid var(--line);background:#fff}
.header-inner{max-width:1160px;margin:auto;padding:15px clamp(14px,4vw,34px);display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:750;text-decoration:none;white-space:nowrap}
.mark{display:grid;gap:3px;width:17px}.mark i{height:4px;border-radius:4px;background:#e97118}.mark i:nth-child(2){width:12px;background:#ffa10c}.mark i:nth-child(3){width:5px;background:#20a994}
.contact{font-size:.86rem;text-align:right;text-underline-offset:3px;color:var(--muted)}
main{max-width:1160px;margin:auto;padding:0 clamp(10px,3vw,30px) 32px}
.intro{max-width:880px;margin:30px auto 19px}.kicker{margin:0 0 4px;color:var(--orange);font-size:.82rem;font-weight:750;letter-spacing:.095em}
h1{margin:0;font-size:clamp(1.85rem,5vw,3rem);line-height:1.12;letter-spacing:-.045em}.intro p:last-child{margin:8px 0 0;color:var(--muted)}
.viewer{background:var(--warm);border:1px solid var(--line);border-radius:14px;max-width:936px;margin:auto}
.toolbar{position:sticky;top:0;z-index:2;background:#fcfaf7f5;display:flex;justify-content:center;align-items:center;gap:10px;padding:8px;border-bottom:1px solid var(--line);border-radius:13px 13px 0 0;font-size:.88rem;color:var(--muted)}
.toolbar[hidden]{display:none}
.toolbar button,.toolbar select{min-height:36px;min-width:38px;border:1px solid #cdc7bc;border-radius:8px;background:#fff;color:var(--ink);font:inherit}
.toolbar button{cursor:pointer;font-size:1.1rem}.toolbar button:disabled{opacity:.44;cursor:default}
.toolbar select{padding:0 5px;cursor:pointer}
.sheets{max-width:884px;margin:auto;padding:clamp(5px,2vw,18px);display:grid;gap:clamp(8px,1.6vw,17px)}
.sheet{position:relative;margin:0;scroll-margin-top:60px;aspect-ratio:680.315/907.087;background:white;box-shadow:0 2px 8px #31210d1c}
.sheet img,.sheet canvas{display:block;width:100%;height:auto}.sheet canvas{position:absolute;inset:0}.sheet[data-rendered] img{opacity:0}
footer{max-width:936px;margin:0 auto;padding:0 14px 24px;color:var(--muted);font-size:.86rem;display:flex;justify-content:space-between;gap:10px}
@media(max-width:480px){.header-inner{padding:12px 11px}.brand{font-size:.88rem}.contact{font-size:.74rem}.intro{margin:19px 2px 13px}.intro p:last-child{font-size:.88rem}.viewer{border-radius:9px}.toolbar{border-radius:8px 8px 0 0}}