/* 10.61 — full-width private chat with a WhatsApp-like internal scroll. */
.inbox-shell{
  width:100%;
  height:clamp(590px,72dvh,820px);
  min-height:0;
  grid-template-columns:minmax(290px,360px) minmax(0,1fr);
  border:1px solid #cfe0e6;
  border-radius:28px;
  box-shadow:0 24px 70px #062b501c;
}
.inbox-shell--student{grid-template-columns:minmax(0,1fr)!important}
.inbox-chat{position:relative;min-width:0;min-height:0;grid-template-rows:auto minmax(0,1fr) auto;background:#eaf3f3}
.inbox-chat:before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.2;background-image:radial-gradient(#0a807a 1px,transparent 1px),radial-gradient(#0a807a 1px,transparent 1px);background-position:0 0,16px 16px;background-size:32px 32px}
.inbox-chat.alt-wallpaper:before{opacity:.15;background-image:linear-gradient(45deg,#0a817b 12.5%,transparent 12.5%,transparent 50%,#0a817b 50%,#0a817b 62.5%,transparent 62.5%,transparent);background-size:38px 38px}
.inbox-chat>header,.inbox-compose{position:relative;z-index:3}
.inbox-chat>header{min-height:76px;padding:12px 20px;background:linear-gradient(110deg,#fff,#f4fbfb)}
.inbox-chat>header .leader-avatar{width:48px;height:48px;border-radius:16px;background:linear-gradient(145deg,#092e50,#0aa39a);color:#fff;box-shadow:0 8px 22px #0735562c}
.inbox-chat-person{min-width:0;flex:1}.inbox-chat-person h2{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:19px}.inbox-chat-person p{display:flex;align-items:center;gap:5px;color:#647e8c;font-size:11px}.inbox-chat-person p i{width:8px;height:8px;border-radius:50%;background:#2fd17f;box-shadow:0 0 0 4px #2fd17f18}
.inbox-header-actions{display:flex;gap:7px}.inbox-header-actions button{width:40px;height:40px;border:1px solid #d2e3e8;border-radius:13px;background:#fff;color:#0b5265;font-size:18px;cursor:pointer}.inbox-header-actions button:hover{background:#e7f8f5;color:#087c73}
.inbox-messages{position:relative;z-index:2;min-height:0;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;padding:24px clamp(16px,3vw,46px);gap:7px;scrollbar-width:thin;scrollbar-color:#76aaa7 transparent}
.inbox-date-separator{align-self:center;position:sticky;top:4px;z-index:2;margin:8px 0;padding:6px 12px;border-radius:999px;background:#fffdf0dd;color:#526b75;font-size:10px;font-weight:800;box-shadow:0 3px 10px #062b5013;backdrop-filter:blur(8px)}
.chat-bubble{position:relative;min-width:115px;max-width:min(72%,760px);padding:10px 13px 7px;border-radius:18px;font-size:14px;box-shadow:0 4px 14px #062b5012;animation:chatBubbleIn .18s ease both}
.chat-bubble.mine{background:linear-gradient(135deg,#087d78,#07968d);border-end-end-radius:5px}.chat-bubble.theirs{background:#fff;border-end-start-radius:5px;color:#12344e}.chat-bubble b{display:block;margin-bottom:2px;font-size:9px}.chat-bubble p{margin:2px 0 4px;white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px;line-height:1.62}.chat-bubble footer{display:flex;align-items:center;justify-content:flex-end;gap:6px}.chat-bubble small{font-size:9px;opacity:.72}.chat-delivery{font-size:11px;letter-spacing:-3px}.chat-copy{position:absolute;top:7px;inset-inline-end:7px;width:24px;height:24px;border:0;border-radius:8px;background:transparent;color:inherit;opacity:0;cursor:pointer}.chat-bubble:hover .chat-copy,.chat-copy:focus{opacity:.65}.chat-copy.copied{opacity:1;color:#ffd86a}
@keyframes chatBubbleIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.inbox-compose{display:block;padding:8px 14px 10px;border-top:1px solid #d3e3e7;background:#fff}.inbox-quick-replies{display:flex;gap:6px;overflow-x:auto;padding:0 0 7px;scrollbar-width:none}.inbox-quick-replies button{flex:0 0 auto;border:1px solid #d2e4e8;border-radius:999px;background:#f4fafb;color:#275668;padding:6px 10px;font:700 10px inherit;cursor:pointer}.inbox-quick-replies button:hover{background:#e2f7f3;border-color:#91d7ce}.inbox-compose-row{display:flex;align-items:flex-end;gap:8px}.inbox-compose textarea{flex:1;min-height:46px;max-height:130px;padding:12px 48px 12px 14px;line-height:1.5;overflow-y:auto;background:#f7fafb}.inbox-tool,.inbox-send{flex:0 0 auto;width:46px;height:46px;border:0;border-radius:15px;cursor:pointer}.inbox-tool{background:#eef6f7;color:#0a6e70;font-size:22px}.inbox-send{display:grid;place-items:center;background:linear-gradient(135deg,#0aa59b,#087878);color:#fff;font-size:21px;box-shadow:0 8px 20px #07877d36}.inbox-send:disabled{opacity:.55}.inbox-send span{transform:rotate(180deg)}[dir=ltr] .inbox-send span{transform:none}.inbox-char-count{position:absolute;inset-inline-end:72px;bottom:24px;color:#8a9ca6;font-size:9px}.inbox-compose-hint{display:block;padding:5px 55px 0;color:#8a9ba4;font-size:9px}.inbox-emoji-wrap{position:relative}.inbox-emoji-panel{position:absolute;z-index:8;inset-inline-start:0;bottom:54px;width:220px;padding:9px;grid-template-columns:repeat(6,1fr);gap:4px;border:1px solid #d5e4e9;border-radius:17px;background:#fff;box-shadow:0 15px 45px #062b5030}.inbox-emoji-panel:not([hidden]){display:grid}.inbox-emoji-panel button{height:31px;border:0;border-radius:8px;background:transparent;font-size:18px;cursor:pointer}.inbox-emoji-panel button:hover{background:#eaf7f5}.inbox-jump-bottom{position:absolute;z-index:5;inset-inline-end:22px;bottom:128px;border:0;border-radius:999px;padding:9px 13px;background:#fff;color:#08766f;box-shadow:0 8px 28px #062b5030;font:800 10px inherit;cursor:pointer}
.inbox-threads>[data-thread-list]{min-height:0;overscroll-behavior:contain}.inbox-thread{transition:.16s}.inbox-thread:hover{background:#e9f5f4;transform:translateX(-2px)}.inbox-thread.active:hover{background:#092d50}.inbox-thread>div{min-width:0}.inbox-thread b,.inbox-thread small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:800px){.inbox-shell{height:calc(100dvh - 112px);min-height:520px;border-radius:18px}.inbox-chat>header{min-height:68px;padding:9px 12px}.inbox-header-actions button{width:36px;height:36px}.inbox-messages{padding:18px 11px}.chat-bubble{max-width:88%;font-size:13px}.chat-bubble p{font-size:14px}.inbox-compose{padding:7px 8px calc(8px + env(safe-area-inset-bottom))}.inbox-quick-replies{padding-bottom:5px}.inbox-compose-hint{display:none}.inbox-char-count{inset-inline-end:66px;bottom:21px}.inbox-jump-bottom{bottom:105px;inset-inline-end:13px}.inbox-chat-person h2{font-size:16px}}