:root{--bg: #0a0e17;--panel: #0f141e;--panel-2: #141b27;--elevated: #1a2230;--accent: #4f7cff;--accent-2: #6b91ff;--accent-soft: rgba(79, 124, 255, .16);--text: #eef2fb;--muted: #8995ac;--faint: #5c6680;--border: rgba(255, 255, 255, .07);--border-strong: rgba(255, 255, 255, .12);--danger: #ff5b66;--radius: 14px;--font: "Inter", -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}a{color:var(--accent-2)}.login-wrap{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(1100px 560px at 82% -12%,rgba(79,124,255,.2),transparent 60%),radial-gradient(900px 520px at -8% 112%,rgba(79,124,255,.12),transparent 60%),var(--bg)}.login-card{width:100%;max-width:400px;background:#10151fc7;border:1px solid var(--border);border-radius:20px;padding:40px 32px;text-align:center;backdrop-filter:blur(10px);box-shadow:0 24px 70px #00000080}.login-logo{width:84px;height:84px;border-radius:22px;margin:0 auto 18px;display:block;box-shadow:0 10px 30px #4f7cff40}.brand-name{margin:0 0 4px;font-size:26px;font-weight:700;letter-spacing:6px}.brand-sub{margin:0 0 26px;color:var(--muted);font-size:13px}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:13px 18px;border:none;border-radius:12px;font-size:15px;font-weight:600;margin-bottom:12px;transition:.15s}.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}.btn.primary:hover{filter:brightness(1.08)}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border-strong)}.btn.ghost:hover{background:#ffffff0d}.btn:disabled{opacity:.5;cursor:default}.divider{display:flex;align-items:center;gap:12px;color:var(--faint);font-size:12px;margin:18px 0}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border)}.field{text-align:left;margin-bottom:12px}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.field input{width:100%;padding:12px 14px;border-radius:10px;background:var(--panel-2);border:1px solid var(--border);color:var(--text);font-size:14px;outline:none}.field input:focus{border-color:var(--accent)}.error{color:var(--danger);font-size:13px;margin:6px 0 0}.foot{margin-top:22px;font-size:12px;color:var(--faint)}.app{display:flex;height:100%}.sidebar{width:300px;flex-shrink:0;display:flex;flex-direction:column;background:var(--panel);border-right:1px solid var(--border)}.sidebar-head{display:flex;align-items:center;gap:10px;padding:16px;border-bottom:1px solid var(--border)}.sidebar-head img{width:30px;height:30px;border-radius:9px}.sidebar-head .title{font-weight:700;letter-spacing:3px;font-size:15px}.sidebar-head .me{margin-left:auto;font-size:12px;color:var(--muted);max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.room-search{padding:10px 12px;border-bottom:1px solid var(--border)}.room-search input{width:100%;padding:9px 12px;border-radius:9px;font-size:13px;background:var(--panel-2);border:1px solid var(--border);color:var(--text);outline:none}.room-list{flex:1;overflow-y:auto}.room-item{display:flex;align-items:center;gap:11px;padding:11px 14px;cursor:pointer;border-left:3px solid transparent}.room-item:hover{background:#ffffff08}.room-item.active{background:var(--accent-soft);border-left-color:var(--accent)}.avatar{width:38px;height:38px;border-radius:11px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2))}.room-meta{min-width:0;flex:1}.room-name{font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.room-preview{font-size:12px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.badge{margin-left:auto;background:var(--accent);color:#fff;font-size:11px;font-weight:700;border-radius:10px;padding:1px 7px}.sidebar-foot{padding:10px 14px;border-top:1px solid var(--border);display:flex}.link-btn{background:none;border:none;color:var(--muted);font-size:12px;padding:4px}.link-btn:hover{color:var(--text)}.conv{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg)}.conv-head{display:flex;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid var(--border);background:var(--panel)}.conv-head .room-name{font-size:15px}.conv-head .enc{margin-left:auto;font-size:11px;color:var(--accent-2);display:flex;align-items:center;gap:4px}.timeline{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:4px}.day-sep{text-align:center;color:var(--faint);font-size:11px;margin:14px 0 8px}.msg{display:flex;gap:10px;padding:3px 0;max-width:78%}.msg.me{align-self:flex-end;flex-direction:row-reverse}.msg .avatar{width:32px;height:32px;border-radius:9px;font-size:13px}.bubble{padding:9px 13px;border-radius:14px;font-size:14px;line-height:1.5;background:var(--elevated);word-break:break-word;white-space:pre-wrap}.msg.me .bubble{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}.msg .meta{font-size:11px;color:var(--faint);margin-bottom:3px}.msg.me .meta{text-align:right}.sender-name{font-size:12px;color:var(--accent-2);margin-bottom:2px;font-weight:600}.bubble.notice{font-style:italic;color:var(--muted);background:transparent;padding-left:0}.bubble.undecryptable{color:var(--faint);font-style:italic}.bubble img.media{max-width:260px;border-radius:10px;display:block}.composer{display:flex;gap:10px;padding:14px 20px;border-top:1px solid var(--border);background:var(--panel)}.composer textarea{flex:1;resize:none;max-height:140px;min-height:44px;padding:12px 14px;border-radius:12px;font-size:14px;line-height:1.4;background:var(--panel-2);border:1px solid var(--border);color:var(--text);outline:none;font-family:inherit}.composer textarea:focus{border-color:var(--accent)}.send-btn{width:44px;height:44px;flex-shrink:0;align-self:flex-end;border:none;border-radius:12px;color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:flex;align-items:center;justify-content:center}.send-btn:disabled{opacity:.4}.empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--faint);gap:10px}.empty img{width:72px;height:72px;border-radius:18px;opacity:.85}.center-screen{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--muted)}.spinner{width:34px;height:34px;border:3px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:720px){.sidebar{width:100%;position:absolute;inset:0;z-index:5}.sidebar.hidden{display:none}}.sidebar-head .new-btn{margin-left:8px;width:30px;height:30px;flex:0 0 auto;border:1px solid var(--border);border-radius:9px;background:var(--panel-2);color:var(--text);font-size:19px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center}.sidebar-head .new-btn:hover{border-color:var(--accent);color:var(--accent-2)}.sidebar-head .me{max-width:96px}.modal-backdrop{position:fixed;inset:0;z-index:20;background:#0000008c;display:flex;align-items:center;justify-content:center;padding:20px}.modal{width:100%;max-width:420px;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 20px 60px #00000080}.modal-title{font-weight:700;font-size:16px;margin-bottom:14px}.modal-label{display:block;font-size:12px;color:var(--muted);margin:10px 0 5px}.modal-input{width:100%;padding:10px 12px;border-radius:10px;background:var(--panel-2);border:1px solid var(--border);color:var(--text);outline:none}.modal-input:focus{border-color:var(--accent)}.modal-err{color:#ff6b6b;font-size:12px;margin-top:10px}.modal-actions{display:flex;justify-content:flex-end;align-items:center;gap:12px;margin-top:18px}.modal-create{width:auto;height:auto;border-radius:10px;padding:9px 18px;font-size:14px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;border:none;cursor:pointer}.modal-create:disabled{opacity:.6}.modal-overlay{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px;background:#04070d9e;backdrop-filter:blur(6px)}.modal-card{width:100%;max-width:360px;background:#10151ff2;border:1px solid var(--border);border-radius:20px;padding:28px 24px;text-align:center;box-shadow:0 24px 70px #0009}.modal-card img{margin:0 auto 14px;display:block}