:root{color-scheme:light;--ink:#17231f;--muted:#65716c;--brand:#08745d;--brand-dark:#075b4b;--mint:#e9f7f2;--line:#dce5e1;--paper:#fff;--bg:#f5f7f6;--warn:#8a4b08;--warn-bg:#fff5df;--danger:#9a2c2c;--danger-bg:#fff0f0;--shadow:0 12px 34px rgba(23,35,31,.08);font-family:Inter,"Noto Sans JP","Yu Gothic UI",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65}.wrap{width:min(1120px,calc(100% - 32px));margin:auto}.hero{padding:48px 0 34px;background:linear-gradient(145deg,#e5f7f0,#f8fbfa 70%);border-bottom:1px solid var(--line)}.eyebrow{margin:0 0 8px;color:var(--brand);font-size:.82rem;font-weight:800;letter-spacing:.08em}.hero h1{margin:0;font-size:clamp(2rem,6vw,3.5rem);line-height:1.25;letter-spacing:-.04em}.lead{margin:14px 0 0;color:#46534e;font-size:clamp(1rem,2.4vw,1.2rem)}main{padding:28px 0 64px}.tool{display:grid;gap:18px}.steps{display:flex;gap:6px;overflow:hidden;color:var(--muted);font-size:.8rem}.steps span{flex:1;min-width:0;padding:8px;text-align:center;border-radius:999px;background:#e8edeb}.steps .active{color:#fff;background:var(--brand);font-weight:700}.workspace{display:grid;gap:18px}.controls{display:grid;gap:18px}.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.step-heading{display:flex;align-items:flex-start;gap:12px;margin-bottom:18px}.step-heading>span{display:grid;place-items:center;flex:0 0 30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}.step-heading h3{margin:-3px 0 0;font-size:1.18rem}.step-heading p{margin:0;color:var(--muted);font-size:.84rem}.file-drop{display:flex;min-height:118px;align-items:center;justify-content:center;flex-direction:column;border:2px dashed #8bb9aa;border-radius:14px;background:#f4fbf8;cursor:pointer}.file-drop:hover{background:var(--mint)}.file-drop strong{font-size:1.05rem;color:var(--brand-dark)}.file-drop span{font-size:.82rem;color:var(--muted)}.file-drop input{position:absolute;width:1px;height:1px;opacity:0}.image-info{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px}.image-info img{width:56px;height:56px;border-radius:8px;object-fit:cover;background:#eee}.image-info div{display:grid;flex:1}.image-info span{color:var(--muted);font-size:.86rem}.privacy-note{margin:14px 0 0;padding:10px 12px;border-radius:10px;background:var(--mint);font-size:.82rem;color:#36584d}.text-button{border:0;background:none;color:var(--brand);font:inherit;font-size:.85rem;text-decoration:underline;cursor:pointer}.unit-switch{display:inline-flex;margin-bottom:14px;padding:3px;border-radius:10px;background:#edf1ef}.unit-switch button{min-width:60px;padding:7px 14px;border:0;border-radius:8px;background:transparent;font:inherit;cursor:pointer}.unit-switch .selected{background:#fff;color:var(--brand);font-weight:700;box-shadow:0 2px 8px rgba(0,0,0,.08)}.dimension-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;align-items:end}.dimension-grid label{display:grid;grid-template-columns:1fr auto;color:var(--muted);font-size:.8rem}.dimension-grid input{grid-column:1/3;width:100%;margin-top:4px;padding:11px 42px 11px 12px;border:1px solid #b9c7c2;border-radius:10px;font:inherit;font-size:1rem}.dimension-grid .unit-label{grid-column:2;grid-row:2;align-self:center;padding-right:12px;color:var(--ink)}.multiply{padding-bottom:11px;color:var(--muted)}.check-row{display:flex;align-items:center;gap:8px;margin-top:14px;font-size:.9rem}.check-row input{width:18px;height:18px;accent-color:var(--brand)}.quality,.warning,.error,.complete{margin:14px 0 0;padding:10px 12px;border-radius:10px;font-size:.86rem}.quality{background:#edf8f3;color:#25604d}.quality.muted{background:#f2f4f3;color:var(--muted)}.warning{background:var(--warn-bg);color:var(--warn)}.error{background:var(--danger-bg);color:var(--danger);font-weight:650}.complete{background:var(--mint);color:#245547}.complete p{margin:4px 0}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field-grid label{display:grid;gap:4px;color:var(--muted);font-size:.8rem}.field-grid select,.field-grid input{width:100%;min-height:44px;padding:9px 10px;border:1px solid #b9c7c2;border-radius:10px;background:#fff;color:var(--ink);font:inherit}.paper-preview{position:relative;display:grid;place-items:center;width:min(100%,390px);aspect-ratio:210/297;margin:0 auto 18px;overflow:hidden;border:1px solid #cfd8d4;background:#fff;box-shadow:0 8px 22px rgba(23,35,31,.12);transition:aspect-ratio .2s}.paper-preview>p{color:var(--muted);font-size:.85rem}.preview-item{position:absolute;overflow:hidden;border:1px solid rgba(7,91,75,.42);background:#d9efe8}.preview-item img{width:100%;height:100%;object-fit:fill;display:block}.summary{display:grid;gap:0;margin:0;border-top:1px solid var(--line)}.summary div{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px solid var(--line);font-size:.85rem}.summary dt{color:var(--muted)}.summary dd{margin:0;text-align:right;font-weight:650}.primary{width:100%;min-height:52px;margin-top:18px;border:0;border-radius:12px;background:var(--brand);color:#fff;font:inherit;font-weight:800;font-size:1rem;cursor:pointer;box-shadow:0 7px 16px rgba(8,116,93,.22)}.primary:hover{background:var(--brand-dark)}.primary:disabled{background:#acb7b3;cursor:not-allowed;box-shadow:none}.cta-note{margin:8px 0 0;text-align:center;color:var(--muted);font-size:.76rem}.content-section{margin-top:22px;padding:26px;background:#fff;border:1px solid var(--line);border-radius:18px}.content-section h2{margin:0 0 12px;font-size:1.3rem}.content-section p{margin:0}.howto{display:grid;gap:14px;padding:0;list-style:none;counter-reset:step}.howto li{display:grid;grid-template-columns:34px 1fr;column-gap:10px;counter-increment:step}.howto li::before{content:counter(step);grid-row:1/3;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--mint);color:var(--brand);font-weight:800}.howto span{color:var(--muted);font-size:.88rem}.notice{border-left:5px solid #e7a63d}.faq details{padding:13px 0;border-top:1px solid var(--line)}.faq summary{font-weight:700;cursor:pointer}.faq details p{margin:8px 0 0;color:#53615c}footer{padding:26px 0;background:#e7ece9;color:#5d6965;font-size:.82rem}.hidden,.build-marker,.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.hidden{display:none!important}
@media(min-width:840px){.hero{padding:64px 0 46px}.workspace{grid-template-columns:minmax(0,.95fr) minmax(340px,1.05fr);align-items:start}.preview-panel{position:sticky;top:18px}.upload-panel{padding:24px}.howto{grid-template-columns:repeat(3,1fr)}}
@media(max-width:480px){.wrap{width:min(100% - 20px,1120px)}.hero{padding:34px 0 28px}.lead br{display:none}.panel{padding:16px;border-radius:14px}.field-grid{grid-template-columns:1fr}.dimension-grid{gap:6px}.dimension-grid input{padding-left:9px}.image-info{align-items:flex-start;flex-wrap:wrap}.text-button{margin-left:68px}.content-section{padding:20px}.paper-preview{max-height:58vh}}
.margin-field{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;color:var(--muted);font-size:.84rem}.margin-field span{display:flex;align-items:center;gap:7px;color:var(--ink)}.margin-field input{width:92px;padding:9px 10px;border:1px solid #b9c7c2;border-radius:10px;font:inherit}.field-help{margin:5px 0 0;color:var(--muted);font-size:.76rem}