:root{font:16px system-ui,-apple-system,Segoe UI,Arial,sans-serif;color:#f2f7ef;background:#081017;--line:#29423f;--muted:#afc6c1;--mint:#cbf984;--panel:#111f27}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 78% 5%,#14352b 0%,transparent 38%),#081017}header,main,footer{max-width:1280px;margin:auto}header{display:flex;align-items:center;gap:24px;border-bottom:1px solid var(--line);padding:22px 32px}.logo{font-weight:900;letter-spacing:.12em;font-size:18px;color:var(--mint);text-decoration:none}.logo span{font-size:12px;color:#91b6ae;font-weight:500;letter-spacing:.04em}nav{display:flex;gap:24px;margin-left:auto}nav a{color:#cadad5;text-decoration:none;font-size:14px}main{padding:60px 32px}.eyebrow,.step{font-size:12px;font-weight:750;letter-spacing:.18em;color:var(--mint)}h1{font-size:clamp(2rem,5vw,4.3rem);line-height:1.06;letter-spacing:-.05em;max-width:840px;margin:18px 0}h2{font-size:clamp(1.4rem,3vw,2.2rem);margin:10px 0 12px;letter-spacing:-.04em}.lead{font-size:1.15rem;max-width:760px;color:var(--muted);line-height:1.65}.banner{padding:17px 20px;border:1px solid #6e5832;border-radius:13px;background:#201e19;color:#e9d59a;margin:30px 0}.banner.good{color:#d1f0d4;border-color:#365e45;background:#12291e}.grid{display:grid;grid-template-columns:255px minmax(0,1fr);gap:25px;margin-top:34px}aside{align-self:start;position:sticky;top:20px}.tab{display:flex;align-items:center;gap:16px;width:100%;padding:17px;margin:0 0 8px;background:#101c24;border:1px solid var(--line);color:#c6d6d1;text-align:left;font-weight:700;border-radius:12px;cursor:pointer}.tab span{color:var(--mint);font-size:12px}.tab.active{background:#20392d;color:#e8ffc1;border-color:#648f58}.side-note{font-size:13px;line-height:1.65;color:var(--muted);padding:18px;border-left:2px solid #63876d;margin-top:24px}.panel{border:1px solid var(--line);background:rgba(17,31,39,.94);padding:32px;border-radius:20px;min-width:0}.panel[hidden]{display:none}.panel p{line-height:1.7;color:#b4c9c4;max-width:850px}.mini{color:#a9d08a;font-size:12px}.mini span{border:1px solid #345543;border-radius:100px;padding:8px 12px}label{display:block;color:#d5ebe5;font-weight:720;margin:24px 0 9px;font-size:14px}textarea,input,select{background:#08141b;border:1px solid #38544e;border-radius:9px;color:#f3fbea;width:100%;padding:14px;font:inherit;min-width:0}textarea{font:13px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;resize:vertical;tab-size:2}input:focus,select:focus,textarea:focus{outline:2px solid #8fc77f}button{font:inherit;cursor:pointer}button:not(.tab){background:var(--mint);color:#102415;padding:13px 20px;border:1px solid var(--mint);border-radius:10px;font-weight:750}button.ghost{background:transparent;color:#d8efcf;border:1px solid #537e70}button:disabled{opacity:.48;cursor:not-allowed}button:not(:disabled):hover{filter:brightness(1.07)}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:19px}.row.mini{margin:25px 0 15px}.muted{color:#9cbab2;font-size:13px;line-height:1.5}.result{margin-top:18px;padding:18px;background:#0b161d;border:1px solid #30504b;border-radius:11px;white-space:pre-wrap;overflow-wrap:anywhere;color:#cfe0db;font:13px/1.65 ui-monospace,Consolas,monospace;max-height:430px;overflow:auto}.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:18px}.text-link{display:inline-block;color:var(--mint);margin-top:20px}footer{padding:34px 32px 60px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;border-top:1px solid #243e3b;color:#8eaaa1;font-size:12px}#captcha-host{margin-top:16px}@media(max-width:780px){header{padding:18px;flex-wrap:wrap}nav{margin-left:0;order:3;width:100%;justify-content:space-between}main{padding:36px 18px}.grid{grid-template-columns:1fr}aside{position:static;display:grid;grid-template-columns:1fr 1fr;gap:8px}.side-note{grid-column:1/-1;margin:6px 0 0}.tab{margin:0;min-height:75px}.panel{padding:20px}.two{grid-template-columns:1fr}.mini{gap:8px}footer{padding:30px 18px}}

.rights{display:flex;align-items:center;gap:9px;font-weight:500;margin:8px 0 0}.rights input{width:auto;flex:none}
.dev-language{font-size:11px;display:flex;align-items:center;gap:8px;color:#a7bfc0}.dev-language select{background:#142b30;color:#e8fff4;border:1px solid #467267;border-radius:8px;padding:7px 8px;font:inherit;font-size:12px;max-width:180px} @media(max-width:640px){.dev-language{order:5}}

.file-button{display:inline-flex;align-items:center;justify-content:center;margin:0;background:transparent;color:#d8efcf;border:1px solid #537e70;padding:13px 20px;border-radius:10px;font-weight:750;cursor:pointer}.file-button:hover{filter:brightness(1.07)}#contract-interaction{margin-top:30px;padding-top:28px;border-top:1px solid var(--line)}#contract-interaction h3{font-size:1.35rem;margin:10px 0 8px}

.qen-modal[hidden]{display:none}.qen-modal{position:fixed;inset:0;z-index:9999;display:grid;place-items:center;padding:20px;background:rgba(2,8,11,.78);backdrop-filter:blur(10px)}.qen-modal-card{width:min(560px,100%);max-height:min(760px,calc(100vh - 40px));overflow:auto;background:linear-gradient(180deg,#13252b 0%,#0b171d 100%);border:1px solid #42665e;border-radius:22px;padding:26px;box-shadow:0 24px 80px rgba(0,0,0,.55)}.qen-modal-kicker{font-size:11px;letter-spacing:.18em;font-weight:800;color:var(--mint);margin-bottom:9px}.qen-modal-card h3{font-size:1.55rem;margin:0 0 8px}.qen-modal-card>p{margin:0;color:var(--muted);line-height:1.6}.qen-review-details{margin-top:20px;border:1px solid #345149;border-radius:14px;overflow:hidden}.qen-review-row{display:grid;grid-template-columns:132px minmax(0,1fr);gap:14px;padding:13px 15px;border-bottom:1px solid #273f3a}.qen-review-row:last-child{border-bottom:0}.qen-review-label{color:#8faea6;font-size:12px;font-weight:750}.qen-review-value{color:#f2f7ef;font:12px/1.55 ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}.qen-modal-note{margin-top:17px;padding:13px 14px;border-left:3px solid var(--mint);background:#10231d;color:#bcd2ca;font-size:12px;line-height:1.55}.qen-modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}@media(max-width:560px){.qen-modal{padding:12px;place-items:end center}.qen-modal-card{border-radius:20px 20px 12px 12px;padding:20px}.qen-review-row{grid-template-columns:1fr;gap:4px}.qen-modal-actions{display:grid;grid-template-columns:1fr 1fr}.qen-modal-actions button{width:100%}}

/* Basis / advanced Studio switch — no changes to legacy compiler or migration logic. */
.developer-version-switch{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin:0 0 28px;padding:15px 18px;border:1px solid #416c61;background:linear-gradient(95deg,#122e2b,#10212b);border-radius:14px}
.developer-version-switch-label{display:flex;flex-direction:column;gap:4px}
.developer-version-switch-label strong{font-size:15px;color:#e0f8df}
.developer-version-switch-label span{font-size:12px;color:#a5c4b9}
.developer-enhanced-button{display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:13px 18px;border:1px solid #87d5a5;background:#c9f48f;border-radius:11px;color:#142b22!important;text-decoration:none;font-size:14px;font-weight:800;white-space:nowrap;box-shadow:0 5px 20px #0003}
.developer-enhanced-button:hover,.developer-enhanced-button:focus-visible{background:#e1ffaa;outline:2px solid #8ddad8;outline-offset:3px}
@media(max-width:720px){.developer-version-switch{align-items:stretch}.developer-enhanced-button{width:100%}}