/* Lingo — 실시간 번역 채팅 PWA 스타일 */
:root{
  --bg:#0b141a; --panel:#111b21; --panel2:#202c33; --panel3:#2a3942;
  --accent:#00a884; --accent2:#06cf9c; --text:#e9edef; --text2:#8696a0; --text3:#667781;
  --bubble-me:#005c4b; --bubble-other:#202c33; --danger:#f15c6d; --line:#222d34;
  --meta-me:rgba(233,237,239,.6); --divider:rgba(255,255,255,.12);
  --chat-bg:#0b141a; --shadow:0 8px 24px rgba(0,0,0,.4);
  --auth-grad:radial-gradient(ellipse at top,#0e2a25 0%,#0b141a 60%);
  --on-accent:#04231d; --bubble-shadow:0 1px 1px rgba(0,0,0,.18);
  --warn:#f5c518;
  --hd:60px;
}
:root[data-theme="light"]{
  --bg:#e9edf0; --panel:#ffffff; --panel2:#f1f3f5; --panel3:#e3e7ec;
  --accent:#00a884; --accent2:#048a6a; --text:#111b21; --text2:#54656f; --text3:#8a99a3;
  --bubble-me:#d6f5cd; --bubble-other:#ffffff; --danger:#e0364a; --line:#e2e6ea;
  --meta-me:rgba(17,27,33,.42); --divider:rgba(0,0,0,.1);
  --chat-bg:#e9edf0; --shadow:0 8px 24px rgba(0,0,0,.14);
  --auth-grad:radial-gradient(ellipse at top,#d7f0e8 0%,#e9edf0 60%);
  --on-accent:#04231d; --bubble-shadow:0 1px 2px rgba(0,0,0,.1);
  --warn:#c79100;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;font-family:-apple-system,'Segoe UI','Pretendard','Apple SD Gothic Neo',Roboto,'Noto Sans KR',sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overscroll-behavior:none;transition:background .2s}
#app{height:100dvh;overflow:hidden}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
.hidden{display:none!important}

/* ── Auth ── */
.auth{height:100dvh;display:flex;align-items:center;justify-content:center;padding:max(20px,env(safe-area-inset-top)) 20px max(20px,env(safe-area-inset-bottom));background:var(--auth-grad)}
.auth-card{width:100%;max-width:400px;background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:32px 26px;box-shadow:var(--shadow)}
.brand{font-size:30px;font-weight:900;letter-spacing:-1px;text-align:center;margin-bottom:4px;background:linear-gradient(135deg,var(--accent2),#33d6ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.brand-sub{text-align:center;color:var(--text2);font-size:13px;margin-bottom:24px}
.tabs{display:flex;gap:6px;background:var(--panel2);padding:5px;border-radius:11px;margin-bottom:20px}
.tabs button{flex:1;padding:10px;border:none;background:transparent;color:var(--text2);font-weight:700;border-radius:8px;font-size:14px}
.tabs button.on{background:var(--accent);color:var(--on-accent)}
.seg{display:flex;gap:6px;background:var(--panel2);padding:5px;border-radius:11px}
.seg button{flex:1;padding:9px;border:none;background:transparent;color:var(--text2);font-weight:700;border-radius:8px;font-size:13px;transition:background .12s}
.seg button.on{background:var(--accent);color:var(--on-accent)}
.field{margin-bottom:13px}
.field label{display:block;font-size:12px;color:var(--text2);margin-bottom:6px;font-weight:600}
.field input,.field select{width:100%;padding:12px 13px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;color:var(--text);font-size:15px;outline:none}
.field input:focus,.field select:focus{border-color:var(--accent)}
.btn-primary{width:100%;padding:14px;background:var(--accent);color:var(--on-accent);border:none;border-radius:11px;font-size:15px;font-weight:800;margin-top:6px;transition:filter .15s}
.btn-primary:hover{filter:brightness(1.08)}
.btn-primary:disabled{opacity:.6;cursor:wait}
.auth-err{color:var(--danger);font-size:13px;margin-top:12px;text-align:center;min-height:18px}

/* ── Shell ── */
.shell{display:flex;height:100dvh}
.sidebar{width:360px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column}
.chatpane{flex:1;display:flex;flex-direction:column;background:var(--chat-bg)}
.sb-head{height:var(--hd);display:flex;align-items:center;gap:10px;padding:0 14px;border-bottom:1px solid var(--line);background:var(--panel2)}
.sb-head .me{display:flex;align-items:center;gap:10px;flex:1;min-width:0;cursor:pointer}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--panel3);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--text);flex-shrink:0;overflow:hidden;font-size:15px}
.avatar img{width:100%;height:100%;object-fit:cover}
.me-name{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.me-lang{font-size:11px;color:var(--accent2)}
.icon-btn{width:40px;height:40px;border:none;background:transparent;color:var(--text2);border-radius:50%;font-size:19px;display:flex;align-items:center;justify-content:center}
.icon-btn:hover{background:var(--panel3);color:var(--text)}
.sb-search{padding:8px 12px;border-bottom:1px solid var(--line)}
.sb-search input{width:100%;padding:9px 13px;background:var(--panel2);border:1px solid var(--line);border-radius:9px;color:var(--text);font-size:14px;outline:none}
.roomlist{flex:1;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.room{display:flex;align-items:center;gap:12px;padding:11px 14px;cursor:pointer;border-bottom:1px solid var(--line)}
.room:hover{background:var(--panel2)}
.room.on{background:var(--panel3)}
.room-main{flex:1;min-width:0}
.room-top{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.room-name{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.room-time{font-size:11px;color:var(--text3);flex-shrink:0}
.room-bot{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:3px}
.room-last{font-size:13px;color:var(--text2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge{background:var(--accent);color:var(--on-accent);font-size:11px;font-weight:800;min-width:20px;height:20px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;padding:0 6px;flex-shrink:0}

/* ── Chat ── */
.ch-head{height:var(--hd);display:flex;align-items:center;gap:12px;padding:0 14px;border-bottom:1px solid var(--line);background:var(--panel2);flex-shrink:0}
.ch-back{display:none;font-size:22px}
.ch-title{flex:1;min-width:0}
.ch-name{font-weight:700;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ch-sub{font-size:12px;color:var(--text2)}
.ch-sub.online{color:var(--accent2)}
.messages{flex:1;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:18px 8% 8px;display:flex;flex-direction:column;gap:3px}
@media(max-width:1000px){.messages{padding:14px 14px 8px}}
.daysep{align-self:center;background:var(--panel2);color:var(--text2);font-size:11px;padding:4px 12px;border-radius:10px;margin:10px 0}
.msg{max-width:72%;padding:7px 10px 6px;border-radius:11px;position:relative;word-wrap:break-word;cursor:pointer;animation:pop .15s ease-out;box-shadow:var(--bubble-shadow)}
@keyframes pop{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.msg.me{align-self:flex-end;background:var(--bubble-me);border-bottom-right-radius:3px}
.msg.other{align-self:flex-start;background:var(--bubble-other);border-bottom-left-radius:3px}
.msg .sender{font-size:12px;font-weight:700;color:var(--accent2);margin-bottom:2px}
.msg .body{font-size:14.5px;line-height:1.4;white-space:pre-wrap}
.msg .orig{font-size:12.5px;color:var(--text2);margin-top:4px;padding-top:4px;border-top:1px dashed var(--divider);white-space:pre-wrap}
.msg .meta{font-size:10.5px;color:var(--text3);text-align:right;margin-top:2px;display:flex;gap:5px;justify-content:flex-end;align-items:center}
.msg.me .meta{color:var(--meta-me)}
.msg .tr-tag{font-size:9.5px;background:rgba(0,168,132,.22);color:var(--accent2);padding:1px 5px;border-radius:6px;margin-right:auto}
.read-tick{color:#53bdeb}
.typing{align-self:flex-start;color:var(--text2);font-size:13px;padding:4px 10px;font-style:italic}
.composer{display:flex;align-items:flex-end;gap:8px;padding:10px 14px;background:var(--panel2);border-top:1px solid var(--line);flex-shrink:0}
.composer textarea{flex:1;resize:none;max-height:120px;padding:11px 14px;background:var(--panel);border:1px solid var(--line);border-radius:20px;color:var(--text);font-size:15px;outline:none;line-height:1.4}
.send-btn{width:46px;height:46px;border-radius:50%;border:none;background:var(--accent);color:var(--on-accent);font-size:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.send-btn:disabled{opacity:.4}
.empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text3);gap:10px;text-align:center;padding:20px}
.empty .big{font-size:46px}

/* ── Modal ── */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:100;padding:18px}
.modal{width:100%;max-width:440px;max-height:86dvh;overflow-y:auto;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
.modal h3{margin:0 0 16px;font-size:18px}
.modal .close{position:absolute}
.uitem{display:flex;align-items:center;gap:12px;padding:10px;border-radius:10px;cursor:pointer}
.uitem:hover{background:var(--panel2)}
.uitem.sel{background:var(--panel3)}
.muted{color:var(--text2);font-size:13px}
.row-btns{display:flex;gap:8px;margin-top:16px}
.row-btns .btn-primary{margin-top:0}
.btn-ghost{padding:14px;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:11px;font-weight:700;flex:1}
.chip{display:inline-flex;align-items:center;gap:5px;background:var(--panel3);padding:5px 10px;border-radius:14px;font-size:13px;margin:3px}

/* ── Mobile ── */
@media(max-width:760px){
  .sidebar{width:100%}
  .chatpane{position:fixed;inset:0;z-index:20}
  .shell.in-room .sidebar{display:none}
  .shell:not(.in-room) .chatpane{display:none}
  .ch-back{display:flex}
  .msg{max-width:82%}
  /* 노치/홈인디케이터 안전영역 */
  .sb-head{height:auto;min-height:var(--hd);padding-top:max(0px,env(safe-area-inset-top))}
  .ch-head{height:auto;min-height:var(--hd);padding-top:max(0px,env(safe-area-inset-top))}
  .composer{padding-bottom:max(10px,env(safe-area-inset-bottom))}
  .empty{padding-bottom:max(20px,env(safe-area-inset-bottom))}
}
.toast{position:fixed;left:50%;bottom:80px;transform:translateX(-50%);background:var(--panel3);color:var(--text);padding:11px 18px;border-radius:24px;font-size:14px;z-index:200;box-shadow:var(--shadow);animation:pop .2s}

/* ── A단계: 친구 탭 / 친구목록 / 시스템메시지 ── */
.sb-tabs{display:flex;border-bottom:1px solid var(--line);background:var(--panel2)}
.sb-tabs button{flex:1;padding:11px 0;background:transparent;border:none;border-bottom:2px solid transparent;color:var(--text2);font-size:14px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px}
.sb-tabs button.on{color:var(--text);border-bottom-color:var(--accent)}
.tabbadge{background:#e44;color:#fff;font-size:11px;font-weight:800;min-width:18px;height:18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;padding:0 5px}
.friendlist{flex:1;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.fl-sec{padding:12px 14px 6px;font-size:12px;font-weight:700;color:var(--text2)}
.frow{display:flex;align-items:center;gap:11px;padding:9px 12px}
.frow:hover{background:var(--panel2)}
.frow-main{flex:1;min-width:0;cursor:pointer}
.frow-name{font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.frow-main .muted{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.frow-act{display:flex;gap:6px}
.btn-sm{padding:6px 12px;border:1px solid var(--line);background:var(--panel2);color:var(--text);border-radius:8px;font-size:13px;font-weight:700;cursor:pointer}
.btn-sm.ok{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.btn-sm:hover{filter:brightness(1.06)}
.sysmsg{align-self:center;margin:8px auto;padding:5px 12px;background:var(--panel3,#2a2f36);color:var(--text2);font-size:12px;border-radius:12px;max-width:80%;text-align:center}

/* ── B단계: 이미지/파일·수정삭제·반응·읽음·검색 ── */
.composer{display:flex;align-items:flex-end;gap:6px}
.composer .icon-btn{flex:0 0 auto}
.searchbar{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--panel2)}
.searchbar input{flex:1;padding:8px 12px;background:var(--panel);border:1px solid var(--line);border-radius:9px;color:var(--text);outline:none}
.img-wrap{display:block;max-width:240px}
.img-wrap img{max-width:240px;max-height:280px;border-radius:10px;display:block}
.body.cap{margin-top:5px}
.file-chip{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;color:var(--text);text-decoration:none;max-width:240px}
.file-chip .fn{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}
.file-chip .fs{color:var(--text2);font-size:12px;flex:0 0 auto}
.body.deleted{font-style:italic;color:var(--text2)}
.reacts{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}
.react{font-size:12px;padding:2px 7px;border-radius:11px;background:var(--panel2);border:1px solid var(--line);cursor:pointer;user-select:none}
.react.mine{background:rgba(0,200,150,.18);border-color:var(--accent)}
.msg .meta{display:flex;align-items:center;gap:6px}
.msg .meta .ed{font-size:11px}
.unread-cnt{color:var(--warn);font-size:11px;font-weight:800}
.read-done{color:var(--text2);font-size:11px}
.msg-act{border:none;background:transparent;color:var(--text2);cursor:pointer;font-size:14px;padding:0 2px;opacity:0;line-height:1}
.msg:hover .msg-act{opacity:.8}
.msg.hl{animation:hlflash 1.6s ease}
@keyframes hlflash{0%,100%{background:transparent}30%{background:rgba(245,197,24,.22)}}
.emoji-row{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 12px}
.emoji-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:4px;margin:6px 0}
.emoji-pick{font-size:22px;background:transparent;border:none;cursor:pointer;padding:6px;border-radius:8px}
.emoji-pick:hover{background:var(--panel2)}
.search-res{max-height:50vh;overflow-y:auto}
.sr-item{padding:9px 10px;border-radius:9px;cursor:pointer}
.sr-item:hover{background:var(--panel2)}