:root{
  --bg:#ffffff; --bg2:#f7f8fa; --bg3:#eef1f5; --panel:#ffffff;
  --accent:#2563eb; --accent-2:#1d4ed8; --accent-soft:#e8f0fe;
  --grad:linear-gradient(135deg,#4f8cff,#2563eb);
  --grad-ai:linear-gradient(135deg,#10b981,#059669);
  --text:#1f2430; --muted:#7a869a; --faint:#9aa5b5;
  --bubble-me:linear-gradient(135deg,#3b82f6,#2563eb); --bubble-other:#f1f3f7;
  --bubble-ai:#ecfdf5; --ai-border:#a7f3d0;
  --border:#e6e9ef; --border-2:#eef1f5; --danger:#ef4444; --green:#10b981; --purple:#7c5cff;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06);
  --shadow:0 4px 16px rgba(16,24,40,.08);
  --shadow-lg:0 20px 50px rgba(16,24,40,.18);
  --r:14px;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:"Pretendard",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans KR",sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}
button{font-family:inherit;cursor:pointer}
textarea,input,select{font-family:inherit}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#d4dae3;border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:#bcc4d0}

/* ---------- 로그인 ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:radial-gradient(1200px 700px at 50% -20%,#e8f0ff,#f7f8fa 60%)}
.login-card{background:#fff;padding:40px 36px;border-radius:22px;width:360px;
  box-shadow:var(--shadow-lg);text-align:center;border:1px solid var(--border)}
.login-logo{width:64px;height:64px;margin:0 auto 6px;border-radius:18px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;font-size:32px;box-shadow:0 8px 20px rgba(37,99,235,.3)}
.login-card h1{margin:14px 0 2px;font-size:24px;font-weight:800;letter-spacing:-.5px}
.login-sub{color:var(--muted);margin:0 0 22px;font-size:13px}
.login-card input{width:100%;padding:13px 15px;margin:6px 0;border-radius:12px;border:1.5px solid var(--border);
  background:#fbfcfd;color:var(--text);outline:none;transition:.15s;font-size:14px}
.login-card input:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 4px var(--accent-soft)}
.login-card button{width:100%;padding:13px;margin-top:12px;border:none;border-radius:12px;
  background:var(--grad);color:#fff;font-weight:700;font-size:15px;box-shadow:0 6px 16px rgba(37,99,235,.28);transition:.15s}
.login-card button:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(37,99,235,.34)}
.login-error{background:#fef2f2;color:#dc2626;padding:11px;border-radius:10px;margin-bottom:10px;font-size:13px;border:1px solid #fecaca}
.login-alt{margin-top:18px;font-size:13px}
.login-alt a{color:var(--accent);text-decoration:none;font-weight:600}
.login-foot{color:var(--faint);font-size:11px;margin-top:24px}

/* ---------- 레이아웃 ---------- */
#app{display:grid;grid-template-columns:84px 300px 1fr 0;height:100vh;transition:grid-template-columns .22s ease}
#app.show-files{grid-template-columns:84px 300px 1fr 340px}

/* ---------- 내비게이션 레일 ---------- */
.rail{background:linear-gradient(180deg,#1e293b,#0f172a);display:flex;flex-direction:column;align-items:center;
  padding:14px 8px;gap:6px;overflow-y:auto}
.rail-logo{width:46px;height:46px;border-radius:14px;background:var(--grad);display:flex;align-items:center;
  justify-content:center;font-size:24px;box-shadow:0 6px 16px rgba(37,99,235,.4);margin-bottom:8px;flex-shrink:0}
.rail-btn{width:64px;padding:9px 4px;border:none;background:transparent;color:#94a3b8;border-radius:14px;
  display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;transition:.14s;text-decoration:none;flex-shrink:0}
.rail-btn .ri{font-size:22px;line-height:1}
.rail-btn .rl{font-size:11px;font-weight:600;letter-spacing:-.2px}
.rail-btn:hover{background:rgba(255,255,255,.08);color:#e2e8f0}
.rail-btn.active{background:rgba(59,130,246,.22);color:#fff}
.rail-btn.active .ri{transform:scale(1.05)}
.rail-spacer{flex:1}

/* ---------- 홈(온보딩) 뷰 ---------- */
.home{position:absolute;inset:0 0 0 84px;background:linear-gradient(180deg,#f8fafc,#eef2f7);
  overflow-y:auto;display:none;z-index:15}
#app.mode-home .home{display:block}
#app.mode-home .sidebar,#app.mode-home .chat{visibility:hidden}
.home-inner{max-width:940px;margin:0 auto;padding:48px 32px 60px}
.home-hi{font-size:30px;font-weight:800;letter-spacing:-.6px;margin:0 0 6px}
.home-hi .wave{display:inline-block;animation:wave 1.6s ease-in-out infinite;transform-origin:70% 70%}
@keyframes wave{0%,60%,100%{transform:rotate(0)}20%{transform:rotate(16deg)}40%{transform:rotate(-8deg)}}
.home-sub{color:var(--muted);font-size:15px;margin:0 0 28px}
.home-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-bottom:28px}
.home-card{background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px;box-shadow:var(--shadow-sm);transition:.15s}
.home-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.home-card .hc-ic{width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:12px}
.home-card h3{margin:0 0 5px;font-size:16px;font-weight:700}
.home-card p{margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.55}
.home-section-title{font-size:16px;font-weight:800;margin:8px 0 14px;display:flex;align-items:center;gap:8px}
.home-steps{display:flex;flex-direction:column;gap:10px;margin-bottom:32px}
.home-step{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px}
.home-step .sn{width:30px;height:30px;border-radius:50%;background:var(--accent-soft);color:var(--accent-2);
  font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.home-step.done .sn{background:var(--green);color:#fff}
.home-step .st-body{flex:1}
.home-step .st-body h4{margin:0 0 3px;font-size:14.5px}
.home-step .st-body p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.rooms-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.room-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:16px;cursor:pointer;
  display:flex;gap:12px;align-items:center;transition:.15s}
.room-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:#cbd5e1}
.room-card .rc-av{width:44px;height:44px;border-radius:13px;color:#fff;font-weight:800;display:flex;
  align-items:center;justify-content:center;flex-shrink:0;font-size:16px}
.room-card .rc-name{font-weight:700}
.room-card .rc-desc{color:var(--muted);font-size:12.5px;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:150px}

/* ---------- 사이드바 ---------- */
.sidebar{background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;min-width:0}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:18px 16px 12px}
.brand{font-weight:800;font-size:18px;display:flex;gap:10px;align-items:center;letter-spacing:-.4px}
.brand .logo{width:32px;height:32px;border-radius:10px;background:var(--grad);display:flex;align-items:center;
  justify-content:center;font-size:17px;box-shadow:0 4px 10px rgba(37,99,235,.28)}
.search{padding:0 14px 12px}
.search input{width:100%;padding:11px 14px;border-radius:12px;border:1.5px solid transparent;background:var(--bg3);
  color:var(--text);outline:none;transition:.15s;font-size:13.5px}
.search input:focus{background:#fff;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.room-list{flex:1;overflow-y:auto;padding:4px 8px}
.room-item{display:flex;gap:12px;align-items:center;padding:11px 12px;cursor:pointer;border-radius:14px;margin-bottom:2px;transition:.12s}
.room-item:hover{background:#fff;box-shadow:var(--shadow-sm)}
.room-item.active{background:#fff;box-shadow:var(--shadow);border:1px solid var(--border)}
.room-avatar{width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#fff;flex-shrink:0;font-size:16px;box-shadow:var(--shadow-sm)}
.room-meta{min-width:0;flex:1}
.room-del{opacity:0;color:var(--muted);cursor:pointer;font-size:15px;padding:5px;border-radius:8px;flex-shrink:0;transition:.1s}
.room-item:hover .room-del{opacity:1}
.room-del:hover{color:var(--danger);background:var(--bg3)}
.room-name{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14.5px}
.room-desc{color:var(--muted);font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:1px}
.sidebar-foot{border-top:1px solid var(--border);padding:12px 14px;display:flex;align-items:center;justify-content:space-between;background:var(--bg2)}
.me{display:flex;gap:10px;align-items:center;min-width:0}
.foot-actions{display:flex;gap:4px}
.icon-btn{background:transparent;border:none;color:var(--text);font-size:20px;padding:9px;border-radius:12px;
  text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:.12s;line-height:1}
.icon-btn:hover{background:var(--bg3);color:var(--text)}
/* 헤더/사이드바 액션 아이콘 — 크고 눈에 잘 띄게 (원형 칩) */
.chat-actions .icon-btn,.foot-actions .icon-btn,.sidebar-head #newRoomBtn,.fp-head .icon-btn{
  font-size:22px;width:44px;height:44px;background:#fff;border:1px solid var(--border);
  box-shadow:var(--shadow-sm);color:#334155}
.chat-actions .icon-btn:hover,.foot-actions .icon-btn:hover,.sidebar-head #newRoomBtn:hover,.fp-head .icon-btn:hover{
  background:var(--accent-soft);border-color:#bcd4ff;color:var(--accent-2);transform:translateY(-1px)}
.sidebar-head #newRoomBtn{font-size:26px;color:var(--accent);font-weight:700}
.chat-actions{gap:8px}

/* ---------- 채팅 ---------- */
.chat{display:flex;flex-direction:row;min-width:0;overflow:hidden}
.chat-col{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;background:linear-gradient(180deg,#fbfcfe,#f4f6fa)}
/* 채팅 ↔ 화상회의 분할 구분선 (드래그로 크기 조절) */
.split-divider{display:none;flex:0 0 7px;cursor:col-resize;background:var(--border);position:relative;transition:background .12s}
.split-divider::after{content:"";position:absolute;inset:0;margin:auto;width:3px;height:34px;background:#c3ccd8;border-radius:3px}
.split-divider:hover{background:var(--accent)}
#app.in-call .split-divider{display:block}
#app.in-call #callView{display:flex}
.menu-btn{display:inline-flex}
/* 데스크톱: 사이드바 접기 */
.expand-sidebar-btn{display:none}
@media(min-width:761px){
  #app.sidebar-collapsed{grid-template-columns:84px 0 1fr 0}
  #app.sidebar-collapsed.show-files{grid-template-columns:84px 0 1fr 340px}
  /* display:none 대신 폭만 0으로 (그리드 흐름 유지 → 채팅 영역이 접히지 않음) */
  #app.sidebar-collapsed .sidebar{min-width:0;overflow:hidden;border-right:none}
  #app.sidebar-collapsed .expand-sidebar-btn{display:flex;position:absolute;left:84px;top:14px;z-index:30;
    width:26px;height:44px;align-items:center;justify-content:center;background:#fff;border:1px solid var(--border);
    border-left:none;border-radius:0 12px 12px 0;box-shadow:var(--shadow);cursor:pointer;color:var(--accent);font-size:13px}
  #app.sidebar-collapsed .expand-sidebar-btn:hover{background:var(--accent-soft)}
}
@media(max-width:1024px) and (min-width:761px){
  #app.sidebar-collapsed .expand-sidebar-btn{left:80px}
}
.chat-head{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;
  background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.ct-name{font-weight:700;font-size:16.5px;letter-spacing:-.3px}
.ct-sub{color:var(--muted);font-size:12.5px;margin-top:1px}
.chat-actions{display:flex;gap:2px}
.messages{flex:1;overflow-y:auto;padding:24px 9%;display:flex;flex-direction:column;gap:12px}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* 메시지 행: 아바타 + 말풍선 */
.msg-row{display:flex;gap:10px;align-items:flex-end;max-width:76%;animation:pop .2s ease}
.msg-row.out{align-self:flex-end;flex-direction:row-reverse}
.msg-row.in{align-self:flex-start}
.msg-row.system{align-self:center;max-width:90%}
.msg-av{width:36px;height:36px;border-radius:12px;color:#fff;font-weight:800;font-size:13px;display:flex;
  align-items:center;justify-content:center;flex-shrink:0;box-shadow:var(--shadow-sm);margin-bottom:2px}
.msg-av.ai{background:var(--grad-ai)}
img.msg-av{object-fit:cover}

.msg{padding:11px 15px;border-radius:18px;background:var(--bubble-other);word-wrap:break-word;
  position:relative;box-shadow:0 1px 2px rgba(16,24,40,.07);min-width:0}
.msg.me{background:var(--bubble-me);color:#fff;border-bottom-right-radius:6px}
.msg.in-user{border-bottom-left-radius:6px}
.msg.ai{background:#fff;border:1px solid var(--ai-border);border-bottom-left-radius:6px}
.msg.system{background:#eef1f5;color:var(--muted);font-size:12px;box-shadow:none;border-radius:20px;padding:6px 14px}
.msg .author{font-size:12.5px;font-weight:700;margin-bottom:4px}
.msg .body{line-height:1.6;font-size:14.5px;overflow-wrap:anywhere}
.msg .body>*:first-child{margin-top:0}
.msg .body>*:last-child{margin-bottom:0}
.msg.me .body a{color:#dbeafe;text-decoration:underline}
.msg .time{font-size:10.5px;color:var(--faint);text-align:right;margin-top:5px}
.msg.me .time{color:rgba(255,255,255,.8)}
.msg .toolcall{font-size:12px;color:#047857;background:#d1fae5;padding:5px 9px;border-radius:8px;margin:5px 0;font-family:ui-monospace,monospace;word-break:break-all}
.ai-cursor::after{content:"▍";animation:blink 1s steps(2) infinite;color:var(--green)}
@keyframes blink{50%{opacity:0}}

/* AI 생성 중 진행 표시 */
.ai-progress{display:inline-flex;align-items:center;gap:9px;color:#059669;font-weight:700;font-size:12.5px;
  margin-top:6px;padding:5px 12px;background:#ecfdf5;border:1px solid var(--ai-border);border-radius:20px}
.ai-spin{width:14px;height:14px;border:2.5px solid #a7f3d0;border-top-color:#059669;border-radius:50%;
  animation:spin .7s linear infinite;flex-shrink:0}
@keyframes spin{to{transform:rotate(360deg)}}
.ai-progress .dots{display:inline-flex;gap:3px}
.ai-progress .dots i{width:6px;height:6px;border-radius:50%;background:#10b981;display:inline-block;animation:bnc 1.2s infinite ease-in-out}
.ai-progress .dots i:nth-child(2){animation-delay:.15s}
.ai-progress .dots i:nth-child(3){animation-delay:.3s}
@keyframes bnc{0%,80%,100%{transform:translateY(0);opacity:.35}40%{transform:translateY(-5px);opacity:1}}
.ai-stop{margin-left:8px;background:#fff;border:1px solid var(--danger);color:var(--danger);font-weight:700;
  font-size:12px;padding:3px 10px;border-radius:16px;cursor:pointer;transition:.12s}
.ai-stop:hover{background:var(--danger);color:#fff}
.ai-stop:disabled{opacity:.6;cursor:default}

/* 대화 선택 삭제 모드 */
.select-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 20px;
  background:var(--accent-soft);border-bottom:1px solid var(--border);font-weight:700;color:var(--accent-2)}
.messages.select-mode .msg-tools{display:none!important}
.messages.select-mode .msg-row{cursor:pointer}
.messages.select-mode .msg-row .msg{transition:.1s}
.messages.select-mode .msg-row.sel .msg{box-shadow:0 0 0 3px var(--accent);}
.messages.select-mode .msg-row.sel::after{content:"✓";position:absolute;width:22px;height:22px;border-radius:50%;
  background:var(--accent);color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center;
  margin:-4px 0 0 -4px;box-shadow:var(--shadow-sm);z-index:2}
.messages.select-mode .msg-row{position:relative}

/* ---------- 마크다운 (AI 답변) ---------- */
.md h1,.md h2,.md h3,.md h4{margin:14px 0 8px;font-weight:800;line-height:1.3;letter-spacing:-.3px}
.md h1{font-size:20px;border-bottom:1px solid var(--border);padding-bottom:6px}
.md h2{font-size:18px}
.md h3{font-size:16px}
.md h4{font-size:14.5px}
.md p{margin:9px 0}
.md ul,.md ol{margin:9px 0;padding-left:22px}
.md li{margin:4px 0}
.md li>ul,.md li>ol{margin:4px 0}
.md blockquote{margin:10px 0;padding:6px 14px;border-left:3px solid var(--accent);background:var(--accent-soft);
  border-radius:0 10px 10px 0;color:#334155}
.md hr{border:none;border-top:1px solid var(--border);margin:14px 0}
.md a{color:var(--accent);text-decoration:underline}
.md b,.md strong{font-weight:700}
.md code{background:rgba(15,23,42,.07);padding:1.5px 6px;border-radius:5px;font-size:12.8px;font-family:ui-monospace,Menlo,Consolas,monospace}
.md pre.code{background:#0f172a;color:#e2e8f0;padding:14px 16px;border-radius:12px;overflow-x:auto;margin:10px 0;line-height:1.5}
.md pre.code code{background:none;color:inherit;padding:0;font-size:12.8px}
.md .md-img{max-width:100%;border-radius:10px;margin:8px 0}
.md table{border-collapse:collapse;margin:10px 0;width:100%;font-size:13px;overflow:hidden;border-radius:10px}
.md th,.md td{border:1px solid var(--border);padding:7px 11px;text-align:left}
.md th{background:var(--bg3);font-weight:700}
.md tr:nth-child(even) td{background:#fafbfc}

.typing-bar{height:20px;padding:0 10%;color:var(--muted);font-size:12.5px;font-style:italic}

/* 입력창 영역 */
.composer{position:relative;align-items:flex-end}
.composer-input{flex:1;display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 14px;border-radius:18px;
  border:1.5px solid var(--border);background:#fff;transition:.15s;min-height:64px}
.composer-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.composer-input.ai-mode{border-color:var(--green);box-shadow:0 0 0 4px rgba(16,185,129,.18)}
.composer-input textarea{flex:1;min-width:120px;resize:none;max-height:200px;min-height:44px;border:none;background:transparent;
  color:var(--text);outline:none;line-height:1.5;font-size:15px;padding:0}
.ai-chip{display:inline-flex;align-items:center;gap:6px;background:var(--grad-ai);color:#fff;font-weight:800;
  padding:6px 12px;border-radius:20px;font-size:13.5px;box-shadow:0 2px 8px rgba(16,185,129,.35);animation:pop .15s ease;flex-shrink:0}
.ai-chip-x{cursor:pointer;font-size:16px;line-height:1;opacity:.85;margin-left:2px}
.ai-chip-x:hover{opacity:1}
.drop-overlay{position:absolute;inset:6px;border:2.5px dashed var(--accent);border-radius:18px;background:rgba(37,99,235,.08);
  display:none;align-items:center;justify-content:center;color:var(--accent-2);font-weight:800;font-size:16px;z-index:5}
.composer.dragover .drop-overlay{display:flex}

/* 스킬 / 슬래시 명령 메뉴 */
.slash-menu{position:absolute;bottom:calc(100% + 8px);left:20px;right:20px;max-width:520px;max-height:300px;
  overflow-y:auto;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);
  padding:8px;z-index:30}
.slash-head{font-size:11.5px;font-weight:700;color:var(--muted);padding:6px 10px 4px;text-transform:none}
.slash-item{display:flex;gap:11px;align-items:center;padding:9px 11px;border-radius:11px;cursor:pointer;transition:.1s}
.slash-item:hover,.slash-item.sel{background:var(--accent-soft)}
.slash-item .si-ic{width:34px;height:34px;border-radius:10px;background:var(--grad-ai);color:#fff;display:flex;
  align-items:center;justify-content:center;flex-shrink:0;font-size:16px}
.slash-item .si-name{font-weight:700;font-size:13.5px}
.slash-item .si-name .si-scope{font-size:10.5px;font-weight:600;color:var(--muted);margin-left:6px;
  background:var(--bg3);padding:1px 7px;border-radius:10px}
.slash-item .si-desc{color:var(--muted);font-size:12px;margin-top:1px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:400px}
.slash-empty{padding:16px;text-align:center;color:var(--muted);font-size:13px;line-height:1.6}

/* 메시지 도구(재실행/삭제) + 첨부/아티팩트 */
.msg .msg-tools{position:absolute;top:4px;right:6px;display:flex;gap:3px;opacity:0;transition:.1s}
.msg:hover .msg-tools{opacity:1}
.msg .msg-tool{cursor:pointer;color:var(--muted);font-size:13px;background:rgba(255,255,255,.9);
  border-radius:7px;padding:1px 6px;border:1px solid var(--border);line-height:1.5}
.msg.me .msg-tool{background:rgba(255,255,255,.25);color:#fff;border-color:transparent}
.msg .msg-tool.re:hover{color:var(--accent)}
.msg .msg-tool.del:hover{color:var(--danger)}
.attachments{display:flex;flex-direction:column;gap:8px;margin-top:8px}
.att-image{max-width:340px;max-height:320px;border-radius:12px;cursor:pointer;border:1px solid var(--border)}
.att-file{display:flex;align-items:center;gap:10px;background:rgba(15,23,42,.05);border:1px solid var(--border);
  border-radius:12px;padding:9px 12px;text-decoration:none;color:inherit;max-width:340px}
.msg.me .att-file{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.25)}
.att-file .att-ic{font-size:22px}
.att-file .att-meta{min-width:0;flex:1}
.att-file .att-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.att-file .att-dl{font-size:12px;opacity:.8}
.composer{display:flex;align-items:flex-end;gap:10px;padding:14px 20px;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-top:1px solid var(--border)}
/* 첨부 버튼 — 크고 깔끔하게 */
.attach-btn{flex-shrink:0;width:52px;height:52px;border-radius:16px;border:1.5px solid var(--border);
  background:var(--bg2);color:#475569;display:flex;align-items:center;justify-content:center;transition:.15s;cursor:pointer}
.attach-btn:hover{background:var(--accent-soft);border-color:#bcd4ff;color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.attach-btn svg{display:block}
.send-btn{border:none;border-radius:16px;width:52px;height:52px;font-size:21px;color:#fff;background:var(--grad);
  box-shadow:0 4px 12px rgba(37,99,235,.32);transition:.15s;flex-shrink:0}
.send-btn:hover{transform:translateY(-1px);filter:brightness(1.05)}

/* 초대 박스 */
.invite-box{background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:16px}
.invite-box input,.invite-box select{padding:11px 13px;border-radius:11px;border:1.5px solid var(--border);background:#fff;color:var(--text);outline:none;font-size:14px}
.invite-box input:focus,.invite-box select:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

/* ---------- 파일 패널 ---------- */
.filepanel{background:var(--bg2);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}
#app:not(.show-files) .filepanel{display:none}
.fp-head{display:flex;align-items:center;justify-content:space-between;padding:16px 16px;border-bottom:1px solid var(--border);font-weight:700}
.fp-head>div{display:flex;gap:2px}
.fp-tree{flex:1;overflow-y:auto;padding:8px}
.fp-node{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:9px;cursor:pointer;font-size:13px;white-space:nowrap;overflow:hidden;transition:.1s}
.fp-node:hover{background:#fff;box-shadow:var(--shadow-sm)}
.fp-node .fp-del{margin-left:auto;opacity:0;color:var(--danger)}
.fp-node:hover .fp-del{opacity:1}
.fp-children{margin-left:16px;border-left:2px solid var(--border-2);padding-left:2px}
.fp-crumb{font-size:12.5px;padding:4px 8px 8px;display:flex;flex-wrap:wrap;gap:2px;align-items:center;color:var(--muted)}
.fp-cr{cursor:pointer;color:var(--accent);font-weight:600}
.fp-cr:hover{text-decoration:underline}
.fp-active{font-size:12px;background:var(--accent-soft);border:1px solid #cfe0ff;border-radius:10px;padding:8px 10px;margin:0 4px 8px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:var(--accent-2)}
.fp-clear{cursor:pointer;color:var(--danger);font-weight:600;text-decoration:underline}
.fp-setactive{margin-left:auto;background:var(--grad);color:#fff;border:none;border-radius:8px;padding:5px 10px;font-weight:700;font-size:11.5px;cursor:pointer}
.fp-node .fp-star{opacity:0;color:#f59e0b;cursor:pointer;font-size:14px;padding:0 4px}
.fp-node:hover .fp-star{opacity:.9}
.fp-node .fp-star:hover{opacity:1;transform:scale(1.2)}

/* ---------- 모달 ---------- */
.modal{position:fixed;inset:0;background:rgba(17,24,39,.45);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fade .15s}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-box{background:#fff;border-radius:20px;width:480px;max-width:94vw;max-height:88vh;overflow-y:auto;padding:26px;box-shadow:var(--shadow-lg);animation:rise .2s ease}
@keyframes rise{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.modal-head{display:flex;align-items:center;justify-content:space-between;font-weight:800;font-size:17px;margin-bottom:18px;letter-spacing:-.3px}
.modal-head>div{display:flex;gap:8px;align-items:center}
.editor-box{width:860px}
.editor-box #editorArea{width:100%;height:60vh;background:#0f172a;color:#e2e8f0;border:none;border-radius:12px;
  padding:16px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;outline:none;resize:none;line-height:1.55}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:11px 13px;border-radius:11px;border:1.5px solid var(--border);
  background:#fbfcfd;color:var(--text);outline:none;transition:.15s;font-size:14px}
.field input:focus,.field select:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 4px var(--accent-soft)}
.field input[type=color]{padding:4px;height:44px;cursor:pointer}
.btn-primary{background:var(--grad);color:#fff;border:none;border-radius:11px;padding:11px 18px;font-weight:700;box-shadow:0 4px 12px rgba(37,99,235,.26);transition:.15s}
.btn-primary:hover{transform:translateY(-1px)}
.btn-danger{background:#fff;color:var(--danger);border:1.5px solid #fecaca;border-radius:11px;padding:10px 16px;font-weight:700;transition:.15s}
.btn-danger:hover{background:#fef2f2}
.btn-ghost{background:var(--bg3);color:var(--text);border:none;border-radius:11px;padding:11px 16px;font-weight:600;transition:.15s}
.btn-ghost:hover{background:#e2e6ec}
.row{display:flex;gap:10px;align-items:center}
.tabs{display:flex;gap:4px;margin-bottom:18px;background:var(--bg3);padding:4px;border-radius:12px}
.tab{padding:9px 16px;cursor:pointer;color:var(--muted);border-radius:9px;font-weight:600;flex:1;text-align:center;transition:.12s}
.tab.active{color:var(--accent);background:#fff;box-shadow:var(--shadow-sm)}
.user-row{display:flex;align-items:center;gap:11px;padding:10px;border-radius:12px;transition:.1s}
.user-row:hover{background:var(--bg2)}
.pill{font-size:11px;padding:3px 9px;border-radius:20px;background:var(--accent-soft);color:var(--accent-2);font-weight:600}
.pill.admin{background:#fee2e2;color:#dc2626}
.pill.ok{background:#d1fae5;color:#047857}
.pill.off{background:#f1f3f5;color:#94a3b8}
.avatar{width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;flex-shrink:0;box-shadow:var(--shadow-sm)}
.muted{color:var(--muted);font-size:12.5px}
.checkline{display:flex;align-items:center;gap:9px;padding:6px 0}
.checkline input[type=checkbox]{width:17px;height:17px;accent-color:var(--accent);cursor:pointer}
.checkline label{cursor:pointer}
hr.sep{border:none;border-top:1px solid var(--border);margin:16px 0}

/* ---------- 화상 회의 (채팅과 분할) ---------- */
.callview{display:none;flex:0 0 55%;min-width:260px;min-height:180px;background:#0b1220;color:#fff;
  flex-direction:column;position:relative;overflow:hidden}
.call-head{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;font-weight:700}
.ch-left{display:flex;align-items:center;gap:14px}
.call-timer{font-variant-numeric:tabular-nums;background:rgba(255,255,255,.1);padding:4px 12px;border-radius:20px;font-size:14px}
.rec-badge{color:#fff;background:var(--danger);padding:4px 12px;border-radius:20px;font-size:12px;animation:blink 1.4s infinite}
.ch-right{display:flex;gap:10px;align-items:center}
.ch-btn{background:rgba(255,255,255,.12);color:#fff;border:none;border-radius:20px;padding:8px 14px;font-weight:700;cursor:pointer}
.ch-btn:hover{background:rgba(255,255,255,.2)}
.call-body{flex:1;display:flex;min-height:0}
.call-stage{flex:1;display:flex;flex-direction:column;min-width:0;position:relative}
.call-grid{flex:1;display:grid;gap:12px;padding:14px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-content:center;overflow:auto}
.call-grid.spotlight{grid-template-columns:1fr;grid-auto-rows:1fr}
.call-grid.spotlight .call-tile:not(.pinned){display:none}
.call-tile{position:relative;background:#111827;border-radius:16px;overflow:hidden;aspect-ratio:16/9;box-shadow:0 8px 24px rgba(0,0,0,.4);border:3px solid transparent;transition:border-color .15s;cursor:pointer}
.call-tile.speaking{border-color:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.4),0 8px 24px rgba(0,0,0,.4)}
.call-tile video{width:100%;height:100%;object-fit:cover;background:#111827}
.call-tile.cam-off video{opacity:0}
.call-tile .tile-avatar{position:absolute;inset:0;display:none;align-items:center;justify-content:center;font-size:40px;font-weight:800;color:#fff}
.call-tile.cam-off .tile-avatar{display:flex}
.call-tile .label{position:absolute;bottom:10px;left:10px;background:rgba(0,0,0,.55);padding:4px 12px;border-radius:20px;font-size:12.5px;color:#fff;backdrop-filter:blur(6px);display:flex;align-items:center;gap:6px}
.call-tile .mute-badge{position:absolute;top:10px;right:10px;width:34px;height:34px;border-radius:50%;background:var(--danger);
  display:none;align-items:center;justify-content:center;font-size:16px;box-shadow:var(--shadow)}
.call-tile.mic-off .mute-badge{display:flex}
.caption-bar{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);max-width:80%;text-align:center;
  color:#fff;font-size:15px;pointer-events:none;display:flex;flex-direction:column;gap:4px}
.caption-bar .cap{background:rgba(0,0,0,.6);padding:5px 14px;border-radius:10px;display:inline-block}
.call-panel{width:300px;background:#0f172a;border-left:1px solid rgba(255,255,255,.08);display:flex;flex-direction:column}
.cp-head{padding:14px 16px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.08)}
.cp-list{flex:1;overflow-y:auto;padding:8px}
.cp-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px}
.cp-item:hover{background:rgba(255,255,255,.06)}
.cp-item.speaking{background:rgba(34,197,94,.15)}
.cp-item .cp-av{width:34px;height:34px;border-radius:10px;overflow:hidden;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.cp-item .cp-av img{width:100%;height:100%;object-fit:cover}
.cp-item .cp-name{flex:1;font-size:13.5px;font-weight:600}
.cp-item .cp-st{display:flex;gap:5px;font-size:14px;opacity:.9}
.call-controls{display:flex;justify-content:center;gap:10px;padding:16px;flex-wrap:wrap}
.cc-btn{background:rgba(255,255,255,.12);color:#fff;border:none;border-radius:14px;padding:9px 14px;min-width:66px;
  display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer;transition:.14s;font-weight:600}
.cc-btn:hover{background:rgba(255,255,255,.22)}
.cc-btn .cc-ic{font-size:20px}
.cc-btn .cc-l{font-size:11px}
.cc-btn.off{background:var(--danger)}
.cc-btn.active{background:var(--accent)}
.device-pop{position:absolute;bottom:92px;right:22px;background:#0f172a;border:1px solid rgba(255,255,255,.12);
  border-radius:14px;padding:16px;width:300px;box-shadow:var(--shadow-lg);z-index:5}
.device-pop .dp-title{font-weight:700;margin-bottom:10px}
.device-pop label{display:block;font-size:12px;color:#9aa5b5;margin:10px 0 4px}
.device-pop select{width:100%;padding:8px 10px;border-radius:8px;border:1px solid rgba(255,255,255,.15);background:#1e293b;color:#fff}
.device-pop .checkline{display:flex;align-items:center;gap:8px;color:#e2e8f0;font-size:13px;margin-top:12px}
.device-pop .checkline input{width:16px;height:16px;accent-color:var(--accent)}

/* 태블릿: 사이드바 축소 */
@media(max-width:1024px){
  #app{grid-template-columns:80px 250px 1fr 0}
  #app.show-files{grid-template-columns:80px 250px 1fr 300px}
}
/* 모바일/좁은 화면: 사이드바·파일패널 오버레이, 분할 세로 배치 */
@media(max-width:760px){
  #app{grid-template-columns:60px 1fr;grid-template-rows:100%}
  #app.show-files{grid-template-columns:60px 1fr}
  .rail{padding:10px 3px}
  .rail-logo{width:40px;height:40px;font-size:20px;margin-bottom:4px}
  .rail-btn{width:52px;padding:8px 2px}
  .rail-btn .ri{font-size:20px}
  .rail-btn .rl{font-size:9.5px}
  .home{inset:0 0 0 60px}
  .home-inner{padding:26px 16px 48px}
  .home-hi{font-size:23px}
  .home-grid{grid-template-columns:1fr}
  .sidebar{position:absolute;left:60px;top:0;z-index:60;width:min(300px,78vw);height:100%;
    transform:translateX(-130%);transition:transform .22s;box-shadow:var(--shadow-lg)}
  #app.show-sidebar .sidebar{transform:none}
  #app:not(.mode-home) .filepanel{position:absolute;right:0;top:0;width:min(320px,86vw);height:100%;z-index:50;box-shadow:var(--shadow-lg)}
  .menu-btn{display:inline-flex}
  .messages{padding:14px 3%}
  .msg-row{max-width:92%}
  .chat-head{padding:10px 12px}
  .ct-name{font-size:15px}
  .ct-sub{font-size:11px}
  .chat-actions{gap:0}
  .chat-actions .icon-btn{width:38px;height:38px;font-size:17px}
  .composer{padding:9px 10px;gap:6px}
  .attach-btn{width:42px;height:42px;border-radius:12px}
  .attach-btn svg{width:20px;height:20px}
  .send-btn{width:42px;height:42px;border-radius:12px;font-size:18px}
  .composer-input{min-height:48px;padding:8px 12px}
  .composer-input textarea{font-size:15px;min-height:34px}
  /* 분할: 회의 위 / 채팅 아래 */
  .chat{flex-direction:column}
  .callview{min-width:0;flex-basis:45%}
  .split-divider{cursor:row-resize;flex-basis:9px}
  .split-divider::after{width:34px;height:3px}
  .call-controls{gap:5px;padding:9px}
  .cc-btn{min-width:52px;padding:6px 6px}
  .call-panel{width:180px}
  .caption-bar{font-size:13px;max-width:92%}
  .device-pop{left:10px;right:10px;width:auto;bottom:84px}
  .modal-box{padding:18px;border-radius:16px}
  .editor-box{width:96vw}
  .editor-box #editorArea{height:52vh}
  .slash-menu{left:8px;right:8px}
}
/* 초소형: 레이블 숨겨 아이콘만 */
@media(max-width:440px){
  .rail-btn .rl{display:none}
  .rail-btn{width:44px;padding:9px 2px}
  #app{grid-template-columns:52px 1fr}
  #app.show-files{grid-template-columns:52px 1fr}
  .sidebar,.home{left:52px}
  .cc-btn .cc-l{display:none}
  .cc-btn{min-width:44px;padding:8px 6px;border-radius:12px}
  .call-panel{display:none!important}
  .login-card{padding:30px 22px;width:94vw}
  .home-grid{gap:12px}
}
/* 모바일 공통: 헤더/입력창/모달 깨짐 방지 */
@media(max-width:760px){
  .chat-title{min-width:0;overflow:hidden}
  .ct-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .chat-actions{flex-shrink:0}
  .chat-actions .icon-btn{width:34px;height:34px;font-size:16px;padding:5px}
  /* 입력창: 버튼과 텍스트영역이 한 줄에 안정적으로 */
  .composer{align-items:flex-end}
  .composer .attach-btn{width:40px;height:40px}
  .composer .send-btn{width:40px;height:40px;font-size:17px}
  .composer-input{min-width:0}
  /* 모달: 화면폭에 맞추고 줄바꿈 허용 */
  .modal{align-items:flex-end}
  .modal-box{width:100vw;max-width:100vw;max-height:92vh;border-radius:18px 18px 0 0;padding:18px 16px}
  .modal .row{flex-wrap:wrap}
  .modal .row>input,.modal .row>select{min-width:0}
  .tabs{flex-wrap:wrap}
  /* iOS 입력 시 자동 확대 방지 */
  .field input,.field select,.field textarea,.composer-input textarea,.invite-box input,.invite-box select{font-size:16px}
  .user-row{gap:8px}
  .rooms-grid{grid-template-columns:1fr}
}
@media(max-width:440px){
  .chat-actions .icon-btn{width:30px;height:30px;font-size:15px;padding:3px}
  .composer{gap:5px;padding:8px}
}