.sim-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,460px);gap:clamp(20px,2vw,40px);align-items:start;width:100%}.phone{background:#0e1621;border-radius:32px;padding:14px;box-shadow:0 24px 60px rgba(0,0,0,.28);position:sticky;top:100px;width:100%;overflow:hidden}.phone-head{background:#17212b;color:#fff;padding:14px 16px;border-radius:20px 20px 0 0;font-weight:800}.chat{min-height:540px;background:#0e1621;padding:18px;overflow:auto}.bubble{background:#182533;color:#e9f2f9;border-radius:16px 16px 16px 5px;padding:14px;margin:0 0 12px;line-height:1.5}.bubble b{color:#fff}.reply-keyboard{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;background:#17212b;padding:8px;border-radius:0 0 20px 20px;border-top:1px solid #26384a}.reply-btn{border:0;background:#2a3a49;color:#f3f6f8;border-radius:9px;padding:10px 8px;font:inherit;font-weight:700;cursor:pointer;min-height:42px}.reply-btn:hover{background:#344a5f}.auth-help{margin-bottom:14px}.sim-note{margin-top:18px}@media(max-width:900px){.sim-layout{grid-template-columns:1fr}.phone{position:static;max-width:none}.chat{min-height:440px}}@media(max-width:520px){.phone{border-radius:20px;padding:8px}.phone-head{border-radius:14px 14px 0 0}.chat{min-height:380px;padding:12px}.bubble{padding:12px}.reply-keyboard{border-radius:0 0 14px 14px;gap:5px}.reply-btn{padding:9px 6px;font-size:13px}}@media(min-width:2200px){.sim-layout{grid-template-columns:minmax(0,1fr) minmax(500px,620px)}.chat{min-height:720px}.phone-head,.bubble,.reply-btn{font-size:1.08rem}.reply-btn{min-height:50px}}