/* Accessible responsive chat sheet; intentionally independent of tutor-card layout. */
.lesson-chat-overlay{position:fixed;inset:0;z-index:2147483000;background:rgba(9,22,42,.66);display:flex;align-items:center;justify-content:center;padding:18px}
.lesson-chat-dialog{background:#fff;width:min(920px,100%);height:min(780px,calc(100dvh - 36px));border-radius:20px;box-shadow:0 24px 85px rgba(0,0,0,.24);display:flex;flex-direction:column;overflow:hidden}
.lesson-chat-bar{height:52px;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;background:#0b1d3a;color:white;gap:8px;font:600 14px Inter,system-ui,sans-serif}
.lesson-chat-bar>div{display:flex;align-items:center;gap:10px}
.lesson-chat-full{color:#fff;text-decoration:underline;font-size:12px}.lesson-chat-close{border:1px solid #b7c5d8;background:transparent;color:#fff;border-radius:9px;width:34px;height:32px;cursor:pointer;font-size:19px}
.lesson-chat-dialog iframe{width:100%;flex:1;min-height:0;border:0;background:#f5f7fb}
@media(max-width:640px){.lesson-chat-overlay{padding:0}.lesson-chat-dialog{width:100%;height:100dvh;border-radius:0}.lesson-chat-bar{height:50px}}

.tutor-card-chat{border:1px solid #cbd5e1;border-radius:9px;background:#eff6ff;color:#0b1d3a;font:600 12px Inter,system-ui,sans-serif;padding:8px 11px;cursor:pointer;min-height:36px}
.tutor-card-chat:hover,.tutor-card-chat:focus-visible{background:#dbeafe;border-color:#5676b5}