:root{--bg:#edefea;--panel:#fff;--ink:#1c231f;--ink-soft:#5b655f;--line:#c9d0c7;--line-strong:#9aa69c;--accent:#2a5caa;--accent-soft:#dce6f4;--warn:#b5442e;--warn-soft:#f5e2dd}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);padding:28px 20px 60px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,Yu Gothic,sans-serif;line-height:1.5}.mono{font-family:ui-monospace,SFMono-Regular,Roboto Mono,SF Mono,Menlo,Consolas,monospace}.wrap{max-width:920px;margin:0 auto}header{margin-bottom:22px}h1{letter-spacing:-.01em;margin:0 0 6px;font-size:22px;font-weight:700}header p{color:var(--ink-soft);margin:0;font-size:14px}.tabs{border:1px solid var(--line-strong);background:var(--panel);border-radius:8px;gap:2px;width:fit-content;margin-bottom:18px;padding:2px;display:flex}.tab-btn{color:var(--ink-soft);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:8px 18px;font-size:14px;font-weight:600;transition:background .15s,color .15s}.tab-btn.active{background:var(--accent);color:#fff}.grid{grid-template-columns:1fr 1fr;align-items:start;gap:18px;display:grid}@media (width<=760px){.grid{grid-template-columns:1fr}}.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:20px;position:relative}.panel:before{content:"";background:repeating-linear-gradient(to right, var(--line-strong) 0 1px, transparent 1px 8px);opacity:.6;height:1px;position:absolute;top:0;left:16px;right:16px}.field{margin-bottom:16px}.field:last-child{margin-bottom:0}label.field-label{color:var(--ink-soft);margin-bottom:6px;font-size:12.5px;font-weight:600;display:block}.chip-row{flex-wrap:wrap;gap:6px;display:flex}.chip{border:1px solid var(--line-strong);color:var(--ink);cursor:pointer;background:#fff;border-radius:999px;padding:6px 12px;font-family:ui-monospace,SFMono-Regular,monospace;font-size:13px}.chip.active{background:var(--accent);border-color:var(--accent);color:#fff}.size-row{align-items:center;gap:8px;display:flex}input[type=number]{border:1px solid var(--line-strong);width:100%;color:var(--ink);background:#fff;border-radius:7px;padding:9px 10px;font-family:ui-monospace,SFMono-Regular,monospace;font-size:14px}select{border:1px solid var(--line-strong);color:var(--ink);background:#fff;border-radius:7px;padding:9px 10px;font-size:14px}input[type=range]{width:100%;accent-color:var(--accent)}input[type=color]{border:1px solid var(--line-strong);cursor:pointer;background:#fff;border-radius:7px;width:44px;height:34px;padding:2px}.ruler{height:14px;margin-top:2px;position:relative}.ruler .tick{background:var(--line-strong);width:1px;height:6px;position:absolute;top:0}.ruler .tick.major{height:10px}.two-col{grid-template-columns:1fr 1fr;gap:10px;display:grid}.checkbox-row{color:var(--ink);align-items:center;gap:8px;font-size:13.5px;display:flex}.checkbox-row input{accent-color:var(--accent)}button.primary{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;margin-top:4px;padding:12px;font-size:14.5px;font-weight:700}button.primary:disabled{cursor:not-allowed;background:#b7c4d6}button.primary:hover:not(:disabled){background:#234b8c}.note{color:var(--ink-soft);margin-top:8px;font-size:12px;line-height:1.5}.note.warn{color:var(--warn)}.readout{border:1px dashed var(--line-strong);background:var(--accent-soft);border-radius:8px;margin-bottom:14px;padding:14px 16px}.readout .big{color:var(--accent);font-family:ui-monospace,SFMono-Regular,monospace;font-size:20px;font-weight:700}.readout .sub{color:var(--ink-soft);margin-top:2px;font-size:12px}.log{border-top:1px solid var(--line);max-height:220px;margin-top:14px;padding-top:10px;overflow-y:auto}.log-empty{color:var(--ink-soft);padding:10px 0;font-size:13px}.log-item{border-bottom:1px solid var(--line);justify-content:space-between;gap:8px;padding:6px 0;font-family:ui-monospace,SFMono-Regular,monospace;font-size:12.5px;display:flex}.log-item:last-child{border-bottom:none}.log-item .name{color:var(--ink)}.log-item .meta{color:var(--ink-soft);white-space:nowrap}.preview-box{border:1px solid var(--line);background:repeating-conic-gradient(#f4f4f2 0% 25%,#fff 0% 50%) 50%/16px 16px;border-radius:8px;justify-content:center;align-items:center;min-height:120px;margin-bottom:14px;padding:10px;display:flex}.preview-box img{border-radius:4px;max-width:100%;max-height:220px;display:block}.preview-box .placeholder{color:var(--ink-soft);font-size:13px}.banner{border:1px solid var(--warn);background:var(--warn-soft);color:var(--warn);border-radius:8px;margin-bottom:12px;padding:8px 12px;font-size:12.5px}.info-section{background:var(--panel);border:1px solid var(--line);border-radius:10px;margin-top:24px;padding:24px 28px}.info-section h2{color:var(--ink);margin:0 0 12px;font-size:16px;font-weight:700}.info-section h2:not(:first-child){margin-top:28px}.usecase-list{color:var(--ink);margin:0;padding-left:20px;font-size:14px;line-height:1.7}.usecase-list li{margin-bottom:8px}.faq-list{margin:0}.faq-list dt{color:var(--ink);margin-top:14px;font-size:14px;font-weight:700}.faq-list dt:before{content:"Q. ";color:var(--accent)}.faq-list dd{color:var(--ink-soft);margin:6px 0 0;padding-left:22px;font-size:13.5px;line-height:1.6;position:relative}.faq-list dd:before{content:"A.";color:var(--ink-soft);font-weight:700;position:absolute;left:0}