:root{--bg:#f3f3f3;--text:#111;--muted:#666;--line:#d9d9d9;--panel:#fff;--accent:#111}*{box-sizing:border-box}html,body{color:var(--text);background:linear-gradient(120deg,#f8f8f8 0%,#efefef 100%);margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}.page{min-height:100vh;padding:24px}.topbar h1{color:#20254d;margin:0;font-size:24px;line-height:1.1}.topbar p{color:var(--muted);margin:2px 0 0;font-size:15px;font-weight:500}.topbar-subtitle{color:#6e738a;margin:6px 0 20px;font-size:13px;font-weight:400}.brand-head{align-items:center;gap:10px;display:flex}.topbar{margin-bottom:20px}.layout{grid-template-columns:minmax(320px,440px) 1fr;align-items:start;gap:20px;display:grid}.stack{gap:20px;display:grid}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}.panel h2{margin:0 0 14px;font-size:16px}.grid{gap:12px;display:grid}.two-cols{grid-template-columns:1fr 1fr}.three-cols{grid-template-columns:1fr 1fr 1fr}.field{gap:6px;margin-bottom:12px;display:grid}.field>span{color:var(--muted);font-size:12px}input,select,textarea,button{font:inherit}input,select,textarea{background:#fff;border:1px solid #cfcfcf;border-radius:8px;padding:10px}input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--accent)45%,white);border-color:var(--accent)}.mode-switch{grid-template-columns:1fr 1fr;gap:8px;display:grid}button{color:#fff;cursor:pointer;background:#111;border:1px solid #1c1c1c;border-radius:8px;padding:10px 12px}button:hover{background:#252525}button:disabled{opacity:.45;cursor:not-allowed}button.active{background:var(--accent);border-color:var(--accent)}button.ghost{color:#111;background:#fff}.actions{grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:12px;display:grid}.primary-action{width:100%;margin-bottom:10px}.howto{border:1px solid var(--line);background:#fff;border-radius:10px;margin-bottom:10px;padding:10px}.howto strong{margin-bottom:6px;font-size:13px;display:block}.howto p{color:#444;margin:4px 0;font-size:12px}.advanced{border:1px solid var(--line);background:#fafafa;border-radius:10px;padding:10px}.advanced summary{cursor:pointer;color:#333;-webkit-user-select:none;user-select:none;margin-bottom:10px;font-size:13px}.preview-box{background:#fcfcfc;border:1px dashed #c7c7c7;border-radius:10px;padding:12px;overflow:auto}.code-label{color:var(--muted);margin:10px 0 6px;font-size:12px;display:block}.code{resize:vertical;width:100%;font-family:Courier New,Courier,monospace;font-size:12px}.status{color:var(--muted);margin:0;font-size:12px}.error{color:#b30000;font-size:11px}.error-text{color:#b30000}@media (max-width:1024px){.layout{grid-template-columns:1fr}}@media (max-width:640px){.page{padding:12px}.topbar h1{font-size:20px}.topbar p{font-size:14px}.two-cols,.three-cols,.actions{grid-template-columns:1fr}}.version-badge{z-index:50;color:#737373;background:#ffffffeb;border:1px solid #d7d7d7;border-radius:999px;padding:4px 9px;font-size:11px;position:fixed;bottom:10px;right:12px}