.assistant-layout {display:grid;grid-template-columns:280px minmax(0,1fr);gap:20px;align-items:start;}
.assistant-layout>* {min-width:0;}
.space-toolbar{display:flex;align-items:start;gap:24px;margin-bottom:20px;}
.space-picker{flex:1;min-width:0;}
.space-toolbar details{flex:1;min-width:0;}
.space-toolbar summary,.move-control summary{cursor:pointer;color:var(--brand);font-size:.875rem;}
#assistant-space-form{display:grid;gap:12px;margin-top:12px;}
.space-notice{font-size:.875rem;}
.move-control{margin-top:10px;font-size:.875rem;}
.move-control form{display:grid;gap:8px;margin-top:8px;}
.source-coverage{font-size:.875rem;border-top:1px solid var(--line);padding-top:12px;margin-top:12px;}
.source-coverage ul{padding-left:20px;}
.source-coverage details{margin-top:8px;}
@media(max-width:720px){.space-toolbar{flex-direction:column;gap:16px;}.space-toolbar>*{width:100%;}.assistant-chat>.toolbar{flex-direction:column;align-items:stretch;}.assistant-chat .chat-picker{width:100%;}}
.assistant-documents h2 {font-size:1.4rem;}
.assistant-documents .muted {font-size:.875rem;}
.document-list {max-height:55vh;overflow:auto;margin-top:16px;}
.document-item {padding:12px 0;border-top:1px solid var(--line);overflow-wrap:anywhere;}
.document-item .option {margin:0 0 6px;align-items:flex-start;}
.document-item .option input {flex-shrink:0;margin-top:6px;}
.document-item .meta,.document-download {display:block;font-size:.75rem;}
.document-download {margin-top:6px;}
.assistant-chat {display:flex;flex-direction:column;gap:16px;}
.chat-picker {flex:1;min-width:0;}
.chat-picker select {max-width:100%;}
.attached-documents {background:var(--surface-muted);border:1px solid var(--line);padding:10px 14px;border-radius:var(--radius-sm);font-size:.875rem;overflow-wrap:anywhere;}
.attached-documents p {margin:4px 0;}
.chat-messages {height:44vh;min-height:250px;overflow:auto;overscroll-behavior:contain;padding:0 4px;}
.chat-turn {display:flex;flex-direction:column;gap:12px;margin-bottom:24px;}
.chat-bubble {padding:14px 16px;border-radius:var(--radius-md);max-width:94%;overflow-wrap:anywhere;}
.chat-bubble p {margin:8px 0;}
.student-message {background:var(--brand-soft);align-self:flex-end;}
.assistant-message {background:var(--surface-muted);align-self:flex-start;}
.chat-empty {margin:40px 0;text-align:center;color:var(--ink-soft);}
#assistant-status:empty {display:none;}
#assistant-status {color:var(--ink-soft);font-size:.875rem;}
#assistant-compose .toolbar {margin-top:12px;}
@media(max-width:1100px){.assistant-layout{grid-template-columns:240px minmax(0,1fr);}}
@media(max-width:720px){.assistant-layout{grid-template-columns:1fr;}.document-list{max-height:200px;}.assistant-chat{padding:16px!important;}.chat-messages{height:45vh;}.chat-bubble{max-width:100%;}}