:root{--bg:#0b1020;--panel:#11182d;--card:#16213d;--text:#eef2ff;--muted:#aab6d3;--border:#273558;--accent:#7c9cff;--accent-2:#35d0ba}*{box-sizing:border-box}html,body{color:var(--text);background:linear-gradient(#09101f 0%,#0f1730 100%);margin:0;padding:0;font-family:Arial,Helvetica,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.container{max-width:1120px;margin:0 auto;padding:24px}.topbar{justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.brand{font-size:24px;font-weight:700}.nav{flex-wrap:wrap;gap:12px;display:flex}.nav a{border:1px solid var(--border);background:#ffffff08;border-radius:10px;padding:10px 14px}.hero{padding:40px 0 16px}.hero h1{margin:0 0 12px;font-size:42px}.hero p{color:var(--muted);max-width:760px;line-height:1.6}.grid{gap:16px;display:grid}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.card{border:1px solid var(--border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#121c32cc;border-radius:16px;padding:20px}.card h3{margin-top:0}.muted{color:var(--muted)}.stack-list{margin:0;padding-left:18px;line-height:1.7}.section-title{margin:28px 0 12px;font-size:22px}.chat-layout{grid-template-columns:minmax(0,1.45fr) minmax(340px,.95fr);align-items:start;gap:24px;max-width:1200px;min-height:calc(100vh - 118px);margin:0 auto;padding:12px 24px 32px;display:grid}.chat-page{min-height:calc(100vh - 88px)}.chat-box{grid-template-rows:auto minmax(0,1fr);gap:14px;height:100%;min-height:0;padding:28px;display:grid}.chat-box h1,.chat-response-card h2{margin:0}.chat-copy{gap:14px;display:grid}.chat-copy .muted{margin:0;line-height:1.28}.chat-composer{align-content:start;gap:12px;min-height:0;margin-top:6px;display:grid}.chat-textarea{min-height:clamp(170px,28vh,240px)}.chat-actions{justify-content:space-between;align-items:center;gap:16px;display:flex}.chat-hint{color:var(--muted);margin:0;font-size:14px;line-height:1.4}.chat-submit{min-width:118px}.chat-response-card{grid-template-rows:auto minmax(0,1fr);gap:14px;height:100%;padding:28px;display:grid}.chat-response-head{gap:12px;display:grid}textarea{border:1px solid var(--border);width:100%;min-height:120px;color:var(--text);resize:vertical;background:#0d1427;border-radius:12px;padding:14px}button.primary{background:linear-gradient(135deg, var(--accent), var(--accent-2));color:#08101f;cursor:pointer;border:0;border-radius:12px;padding:12px 18px;font-weight:700;transition:transform .16s,opacity .16s}button.primary:disabled{cursor:not-allowed;opacity:.65}.button-row{justify-content:flex-end;margin-top:12px;display:flex}pre.response{white-space:pre-wrap;border:1px solid var(--border);background:#0d1427;border-radius:12px;height:100%;min-height:0;margin:0;padding:16px;line-height:1.6;overflow:auto}.input{border:1px solid var(--border);width:100%;color:var(--text);background:#0d1427;border-radius:12px;padding:12px 14px}.file-list{gap:12px;display:grid}.badge{border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:4px 10px;font-size:12px;display:inline-flex}@media (max-width:900px){.grid-3,.chat-layout{grid-template-columns:1fr}.chat-layout{min-height:unset;padding-top:8px}.chat-actions{flex-direction:column;align-items:stretch}.chat-submit{width:100%}.chat-box,.chat-response-card{height:auto}.chat-textarea{min-height:220px}.hero h1{font-size:32px}}