:root{--bg:#f5f0e8;--surface:#fff;--border:#e8dfd2;--text:#3d3c30;--muted:#7a7167;--accent:#c4785a;--accent-press:#a8634a;--field:#f9f1e6;--radius:16px;--max:40rem}*,:before,:after{box-sizing:border-box}html{color-scheme:light}body{margin:0;min-height:100dvh;font-family:"PingFang HK","PingFang TC","Noto Sans TC","Hiragino Sans CNS",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.45}a{color:var(--accent)}.wrap{width:min(100%,var(--max));margin:0 auto;padding:1rem 1rem 2.5rem;padding-left:max(1rem,env(safe-area-inset-left));padding-right:max(1rem,env(safe-area-inset-right))}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:.75rem;top:.75rem;z-index:20;background:var(--surface);padding:.5rem .75rem}.site-header{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:1.25rem}.site-title{margin:0;font-size:1.35rem;font-weight:700}.site-title span{display:block;color:var(--muted);font-size:.95rem;font-weight:500;margin-top:.15rem}.back{font-size:.9rem;text-decoration:none;color:var(--text);border:1px solid var(--border);background:var(--surface);padding:.45rem .7rem;border-radius:999px;min-height:2.5rem;display:inline-flex;align-items:center}.lead,.note{margin:0 0 1rem;color:var(--muted)}.tip,.panel,.card,.calc-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;margin-bottom:1rem}.tool-list{display:grid;gap:.75rem;margin:0;padding:0;list-style:none}.card{text-decoration:none;color:inherit;display:block}.card h2{margin:0 0 .25rem;font-size:1rem}.card p{margin:0;color:var(--muted);font-size:.9rem}.open{display:block;margin-top:.65rem;color:var(--accent);font-weight:600}.panel{padding:1rem}.step-label,.field-label{display:block;margin:.9rem 0 .45rem;font-weight:600}.hint{margin:.45rem 0 0;color:var(--muted);font-size:.82rem}.file-pick{display:block}.chip-set{display:flex;flex-wrap:wrap;gap:.5rem}.chip{position:relative;margin:0;cursor:pointer}.chip input{position:absolute;inset:0;opacity:0;cursor:pointer}.chip span{display:inline-flex;align-items:center;justify-content:center;min-height:48px;min-width:3.5rem;padding:0 1rem;border-radius:999px;background:var(--field);border:1px solid transparent;font-weight:600}.chip input:checked+span{background:var(--accent);color:#fff}.chip input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}input[type=number],input[type=range]{width:100%;min-height:2.75rem;border:1px solid var(--border);border-radius:10px;padding:.4rem .6rem;background:var(--field);color:var(--text)}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:.45rem .9rem;border:0;border-radius:999px;background:var(--accent);color:#fff;font:inherit;cursor:pointer;text-decoration:none}.btn:hover{background:var(--accent-press)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-block{width:100%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.site-footer{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--border);color:var(--muted);font-size:.88rem}.sticky-cta{position:fixed;left:50%;transform:translateX(-50%);width:min(100%,var(--max));bottom:0;z-index:8;padding:.65rem max(1rem,env(safe-area-inset-left)) calc(.75rem + env(safe-area-inset-bottom));background:var(--bg);box-shadow:0 -12px 18px var(--bg)}.tool-page{padding-bottom:calc(5.35rem + env(safe-area-inset-bottom))}.results{display:grid;gap:.75rem}.result-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:.85rem}.result-card img{display:block;width:100%;max-height:12rem;object-fit:contain;background:var(--field);border-radius:10px;margin-bottom:.5rem}.result-card p{margin:.2rem 0}.fail{color:#a35a48}.keys{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem}.keys button{appearance:none;border:0;min-height:3.2rem;border-radius:12px;background:var(--field);color:var(--text);font:inherit;font-size:1.25rem;cursor:pointer}.keys .op{background:var(--accent);color:#fff}.keys .util{background:#eadfce}.keys .span-2{grid-column:span 2}.keys .equals{grid-row:span 2}.display-wrap{background:var(--text);color:var(--field);border-radius:14px;padding:1rem;margin-bottom:.75rem;min-height:5.25rem}.display-wrap p{margin:0;text-align:right;font-size:clamp(1.8rem,8vw,2.6rem);word-break:break-all}.display-wrap #calc-error{font-size:.9rem;color:#ffd5c7}.coming-block{color:var(--muted)}@media(min-width:720px){.wrap{padding-top:2rem}.tool-list{grid-template-columns:1fr 1fr}}
