:root{--navy:#181f32;--blue:#1f6fb8;--sky:#50BDEB;--bg:#f5f7fb;--line:#dfe5ee;--ink:#1d2433;--mut:#5b6578;--red:#c8102e}
*{box-sizing:border-box}
body{margin:0;font-family:var(--mk-font,"Hiragino Sans","Noto Sans JP","Yu Gothic",system-ui,sans-serif);color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--blue)}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
.top{background:var(--navy)}
.bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700}
.brand span{border-left:1px solid #ffffff44;padding-left:10px}
.hnav{display:flex;gap:10px;align-items:center}
.cta-sm{color:#fff;text-decoration:none;font-size:.9rem;border:1px solid #ffffff55;border-radius:8px;padding:5px 10px}
.lang{background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;border:0;border-radius:8px;padding:6px 12px;font-weight:700;cursor:pointer}
.hero{background:linear-gradient(135deg,var(--navy) 0%,#1f3a66 55%,var(--blue) 100%);color:#fff;padding:36px 0 46px}
.hero h1{margin:0 0 6px;font-size:clamp(1.5rem,4vw,2.3rem)}
.hero p{margin:4px 0;color:#dce8f7}
.privacy-badge{display:inline-block;background:#ffffff1a;border:1px solid #ffffff33;border-radius:999px;padding:4px 14px;margin-top:10px!important}
.tabs{display:flex;gap:8px;overflow-x:auto;margin:-24px 0 0;padding:4px 2px 10px;scrollbar-width:thin}
.tab{flex:0 0 auto;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px;cursor:pointer;font-size:.95rem;color:var(--ink);box-shadow:0 2px 8px #18203214}
.tab[aria-selected=true]{background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;border-color:transparent}
.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;margin:8px 0 40px;box-shadow:0 4px 20px #1820320d}
.panel h2{margin:0 0 4px;color:var(--navy)}
.desc{color:var(--mut);margin:0 0 14px}
.note{background:#fff7e6;border:1px solid #f3d38b;border-radius:10px;padding:8px 12px;font-size:.9rem}
.drop{border:2px dashed #b9c6da;border-radius:14px;padding:28px 12px;text-align:center;background:#f9fbfe;cursor:pointer;transition:.15s}
.drop.over{border-color:var(--blue);background:#eaf4fd}
.drop strong{color:var(--blue)}
.files{list-style:none;padding:0;margin:12px 0}
.files li{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;margin:6px 0;background:#fff}
.files li .nm{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ib{border:1px solid var(--line);background:#fff;border-radius:8px;min-width:34px;height:34px;cursor:pointer}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:12px 0}
.row label{display:flex;gap:6px;align-items:center}
input[type=text],input[type=number],select{border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:1rem}
.btn{display:inline-block;background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;border:0;border-radius:10px;padding:11px 20px;font-size:1rem;font-weight:700;cursor:pointer;text-decoration:none}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sec{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.out{margin-top:14px}
.out a.dl{display:inline-block;margin:4px 8px 4px 0}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:12px;margin:12px 0}
.th{border:1px solid var(--line);border-radius:10px;padding:6px;text-align:center;background:#fff;position:relative}
.th canvas{max-width:100%;height:auto;transition:transform .2s;box-shadow:0 1px 4px #0002}
.th.del{opacity:.35;border-color:var(--red)}
.th .pn{font-size:.8rem;color:var(--mut)}
.th .ctl{display:flex;gap:4px;justify-content:center;margin-top:4px}
.stage{position:relative;display:inline-block;max-width:100%;touch-action:none;border:1px solid var(--line)}
.stage canvas{display:block;max-width:100%;height:auto}
.stamp{position:absolute;cursor:move;touch-action:none;user-select:none;-webkit-user-drag:none}
.hanko-prev{width:90px;height:90px;border:1px solid var(--line);border-radius:10px;background:#fff}
.err{color:var(--red)}
.foot{background:var(--navy);color:#c9d3e3;padding:30px 0 18px}
.foot a{color:#9fd3f2}
.fgrid{display:grid;grid-template-columns:1.3fr 1fr 1.2fr;gap:20px}
.flinks{list-style:none;padding:0;margin:0}
.fcta{background:#ffffff0f;border:1px solid #ffffff22;border-radius:14px;padding:14px}
.small{font-size:.86rem}
.copy{border-top:1px solid #ffffff1f;margin-top:18px;padding-top:12px}
.busy{position:fixed;inset:0;background:#181f32b0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;z-index:50}
.busy[hidden]{display:none}
.spin{width:44px;height:44px;border:4px solid #ffffff44;border-top-color:var(--sky);border-radius:50%;animation:s 1s linear infinite}
@keyframes s{to{transform:rotate(360deg)}}
@media(max-width:760px){.fgrid{grid-template-columns:1fr}.cta-sm{display:none}.panel{padding:14px}.brand img{height:28px}}
.lang{text-decoration:none}
.hbanner{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;background:linear-gradient(135deg,var(--navy),#1f3a66);color:#fff;border-radius:14px;padding:14px 18px;margin:-20px 0 40px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.card{display:block;border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:var(--ink);background:#fff;transition:.15s}
.card:hover{border-color:var(--blue);box-shadow:0 4px 16px #1f6fb822}
.card b{display:block;color:var(--navy);font-size:1.05rem}.card .ic{font-size:1.6rem}
.card small{color:var(--mut)}
.cat{margin:6px 0 10px;color:var(--navy)}
.faq{margin:28px 0}.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0}.faq summary{font-weight:700;cursor:pointer}
#mount{min-height:260px}[data-tool=split] #mount{min-height:330px}[data-tool=compress] #mount{min-height:440px}[data-tool=hanko] #mount{min-height:780px}