:root {
  color-scheme: light dark;
  --bg:#f4f5f8;
  --panel:#ffffff;
  --panel2:#f8f8fb;
  --text:#20212a;
  --muted:#777b88;
  --line:#e4e5eb;
  --accent:#aa35b9;
  --accent2:#d248c7;
  --danger:#dc3e56;
  --shadow:0 18px 50px rgba(25,20,35,.14);
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#111217;--panel:#191a20;--panel2:#202128;--text:#f2f2f5;--muted:#a5a8b2;--line:#2d2f38;--shadow:0 18px 50px rgba(0,0,0,.35); }
}
*{box-sizing:border-box} html,body{margin:0;width:100%;height:100%;min-height:0;overflow:hidden;font-family:Inter,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text)}
button,input,textarea,select{font:inherit;color:inherit} button{cursor:pointer} [hidden]{display:none!important}
.center-view{min-height:100%;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% 15%,rgba(183,52,194,.14),transparent 35%),var(--bg)}
.auth-card{width:min(430px,100%);background:var(--panel);border:1px solid var(--line);border-radius:26px;padding:30px;box-shadow:var(--shadow);text-align:center}
.auth-brand{position:relative;width:min(280px,82%);margin:0 auto 12px}.brand-logo{width:100%;height:auto;margin:0;display:block}.version-badge{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;font-size:10px;font-weight:800;line-height:1;padding:4px 6px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);color:var(--muted);box-shadow:0 2px 8px rgba(0,0,0,.08)}.auth-brand .version-badge{position:absolute;right:-2px;bottom:2px}.auth-card h1{margin:6px 0;font-size:30px}.muted,.hint{color:var(--muted)}.hint{font-size:13px;margin-top:18px}
.stack{display:grid;gap:13px;text-align:left;margin-top:22px}.stack label{display:grid;gap:6px;font-size:13px;color:var(--muted)}
input,textarea,select{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:11px 13px;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(170,53,185,.12)}
button{border:0;border-radius:12px;padding:11px 14px}.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:white;font-weight:700}.secondary{background:var(--panel2);border:1px solid var(--line)}.danger-ghost{background:transparent;color:var(--danger);border:1px solid color-mix(in srgb,var(--danger) 35%,transparent)}.small{padding:9px 11px;font-size:13px}
.app-shell{height:100vh;height:100dvh;min-height:0;display:grid;grid-template-columns:330px minmax(0,1fr);overflow:hidden}.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden;z-index:5}
.sidebar-head{height:74px;padding:12px 14px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line)}.mini-logo-wrap{position:relative;flex:0 0 auto}.mini-logo{width:64px;height:38px;object-fit:contain;display:block}.mini-logo-wrap .version-badge{position:absolute;right:-7px;bottom:-5px;font-size:9px;padding:3px 5px}.sidebar-head strong{display:block}.sidebar-head small{display:block;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px;margin-top:3px}.icon-btn{width:38px;height:38px;padding:0;border-radius:50%;background:var(--panel2);border:1px solid var(--line);font-size:20px}.sidebar-head .icon-btn{margin-left:auto}
.sidebar-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:10px 12px}.conversation-list{overflow:auto;flex:1;padding:4px 8px 10px}.conversation{display:flex;gap:11px;align-items:center;padding:10px;border-radius:14px;cursor:pointer}.conversation:hover,.conversation.active{background:var(--panel2)}.avatar{position:relative;width:42px;height:42px;flex:0 0 42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#9a30b5,#db57c7);color:#fff;font-weight:800}.unread-badge{position:absolute;top:-4px;right:-5px;z-index:2;min-width:19px;height:19px;padding:0 5px;border-radius:999px;display:flex;align-items:center;justify-content:center;background:#e04760;color:#fff;border:2px solid var(--panel);font-size:10px;font-weight:900;line-height:1;box-shadow:0 2px 8px rgba(224,71,96,.35)}.unread-badge.dot{width:12px;min-width:12px;height:12px;padding:0;top:-1px;right:-1px;border-width:2px}.conversation .body{min-width:0;flex:1}.conversation .top{display:flex;justify-content:space-between;gap:8px}.conversation .name{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation .preview{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:4px}.conversation time{font-size:11px;color:var(--muted)}.sidebar-foot{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}.sidebar-foot button{flex:1}
.chat-panel{min-width:0;min-height:0;height:100%;overflow:hidden;display:grid;grid-template-rows:74px minmax(0,1fr) auto;background:var(--bg)}.chat-head{grid-row:1;min-height:74px;background:var(--panel);border-bottom:1px solid var(--line);padding:11px 18px;display:flex;align-items:center;gap:10px}.chat-head h2{font-size:18px;margin:0}.typing{height:18px;font-size:12px;color:var(--accent);margin-top:3px}.empty-chat{grid-row:2;align-self:center;justify-self:center;text-align:center;color:var(--muted);max-width:440px;padding:30px}.empty-chat img{width:190px;opacity:.68}.empty-chat h2{color:var(--text)}
.messages{grid-row:2;min-height:0;height:100%;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;scrollbar-gutter:stable;padding:22px max(18px,calc((100vw - 330px - 860px)/2));display:flex;flex-direction:column;gap:8px}.message{display:flex;gap:8px;max-width:min(76%,720px)}.message.mine{align-self:flex-end;flex-direction:row-reverse}.bubble{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:9px 12px;box-shadow:0 4px 14px rgba(0,0,0,.04)}.mine .bubble{background:color-mix(in srgb,var(--accent) 15%,var(--panel));border-color:color-mix(in srgb,var(--accent) 30%,var(--line))}.sender{font-size:12px;font-weight:800;color:var(--accent);margin-bottom:4px}.text{white-space:pre-wrap;word-break:break-word;line-height:1.4}.meta{font-size:10px;color:var(--muted);text-align:right;margin-top:6px}.attachment{display:inline-flex;align-items:center;gap:6px;margin-top:7px;color:var(--accent);text-decoration:none;font-size:13px;font-weight:700}
.composer{grid-row:3;position:relative;z-index:4;width:100%;flex:0 0 auto;display:flex;gap:10px;align-items:flex-end;padding:12px max(16px,calc((100vw - 330px - 860px)/2));padding-bottom:max(12px,env(safe-area-inset-bottom));background:var(--panel);border-top:1px solid var(--line);box-shadow:0 -8px 22px rgba(0,0,0,.04)}.file-btn{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--panel2);border:1px solid var(--line);cursor:pointer;font-size:20px}.compose-main{flex:1;min-width:0}.composer textarea{resize:none;min-height:42px;max-height:120px}.file-name{font-size:11px;color:var(--muted);padding:4px 4px 0}.send-btn{width:42px;height:42px;border-radius:50%;padding:0;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;font-size:18px}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.46);display:grid;place-items:center;padding:18px;z-index:50}.modal-card{width:min(620px,100%);max-height:90vh;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}.modal-head h3{margin:0}.modal-head .icon-btn{font-size:20px}.modal-card #modalBody{padding:18px}.user-list{display:grid;gap:8px}.user-row{display:flex;align-items:center;gap:10px;padding:10px;background:var(--panel2);border:1px solid var(--line);border-radius:12px}.user-row .info{flex:1;min-width:0}.user-row .info strong,.user-row .info small{display:block}.user-row .info small{color:var(--muted);margin-top:2px}.admin-grid{display:grid;gap:10px}.admin-row{display:grid;grid-template-columns:1.3fr 1fr auto;gap:8px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:12px}.badge{font-size:11px;padding:3px 7px;border-radius:999px;background:var(--panel2);border:1px solid var(--line)}.toast{position:fixed;right:18px;bottom:18px;background:#202126;color:white;padding:11px 14px;border-radius:12px;z-index:100;box-shadow:var(--shadow);max-width:360px}.mobile-only{display:none}
@media(max-width:760px){.app-shell{grid-template-columns:minmax(0,1fr)}.sidebar{position:fixed;inset:0 auto 0 0;width:min(88vw,340px);transform:translateX(-105%);transition:transform .2s ease;box-shadow:var(--shadow)}.app-shell.sidebar-open .sidebar{transform:translateX(0)}.mobile-only{display:inline-grid;place-items:center}.messages{padding:16px 12px}.composer{padding:10px}.message{max-width:88%}.chat-head{padding:10px 12px}.auth-card{padding:24px 18px}.admin-row{grid-template-columns:1fr}.sidebar-head small{max-width:160px}}

/* v0.2.0 · Admin updater */
.admin-panel{display:grid;gap:18px}.admin-create-card{margin-top:0;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--panel2)}.admin-create-card h4,.update-card h4{margin:0}.admin-users{display:grid;gap:8px}.update-card{border:1px solid var(--line);border-radius:16px;padding:14px;background:var(--panel2)}.update-head{display:flex;gap:12px;align-items:flex-start;justify-content:space-between}.update-head p{margin:6px 0 0;font-size:12px;line-height:1.45}.update-form{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;margin-top:13px}.update-form input[type=file]{background:var(--panel);padding:9px}.update-status{min-height:18px;margin-top:10px;color:var(--muted);font-size:12px}.modal-card{width:min(760px,100%)}
@media(max-width:760px){.update-form{grid-template-columns:1fr}.update-form button{width:100%}.update-head{align-items:center}}

/* v0.2.5 · avatars + inline media */
.sidebar-identity{min-width:0;flex:1}.profile-btn{margin-left:auto;padding:0;border:0;background:transparent;border-radius:50%}.profile-btn .avatar{cursor:pointer}.avatar{overflow:visible}.avatar-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block}.avatar-initials{position:relative;z-index:0;line-height:1}.avatar-small{width:38px;height:38px;flex:0 0 38px;font-size:11px;border:2px solid color-mix(in srgb,var(--accent) 35%,var(--line));box-shadow:0 2px 10px rgba(0,0,0,.12)}.avatar-message{width:32px;height:32px;flex:0 0 32px;font-size:11px;cursor:pointer}.avatar-admin{width:38px;height:38px;flex:0 0 38px;font-size:10px;cursor:pointer}.avatar-preview{width:220px;height:220px;flex:0 0 220px;font-size:48px;box-shadow:var(--shadow)}.avatar-profile{width:94px;height:94px;flex:0 0 94px;font-size:24px;cursor:pointer}.avatar-preview-wrap{display:grid;justify-items:center;gap:14px;padding:6px 4px 12px}.profile-panel{display:grid;gap:18px}.profile-hero{display:flex;align-items:center;gap:16px}.profile-hero strong,.profile-hero small{display:block}.profile-hero small{margin-top:5px;color:var(--muted)}.profile-actions{display:flex;gap:10px;flex-wrap:wrap}.profile-hint{font-size:12px;line-height:1.5;margin:0}.admin-who{display:flex;align-items:center;gap:10px;min-width:0}
.chat-image,.chat-video{display:block;width:auto;max-width:min(520px,72vw);max-height:440px;border-radius:12px;margin-top:7px;background:#000;object-fit:contain}.chat-image{cursor:zoom-in}.chat-video{min-width:min(360px,60vw)}.chat-audio{display:block;width:min(360px,62vw);max-width:100%;margin-top:8px}.media-viewer{display:grid;place-items:center;max-width:min(92vw,1100px);max-height:78vh;overflow:auto}.media-viewer img,.media-viewer video{display:block;max-width:100%;max-height:74vh;border-radius:12px;background:#000}.attachment{max-width:100%;overflow-wrap:anywhere}.bubble:has(.chat-image),.bubble:has(.chat-video){padding:7px;max-width:min(560px,76vw)}.bubble:has(.chat-image) .sender,.bubble:has(.chat-video) .sender,.bubble:has(.chat-image) .text,.bubble:has(.chat-video) .text{padding-inline:5px}.bubble:has(.chat-image) .meta,.bubble:has(.chat-video) .meta{padding-inline:5px}
@media(max-width:760px){.sidebar-head{gap:9px}.mini-logo{width:58px}.profile-btn{margin-left:0}.avatar-preview{width:180px;height:180px;flex-basis:180px}.chat-image,.chat-video{max-width:74vw;max-height:55vh}.chat-video{min-width:68vw}.bubble:has(.chat-image),.bubble:has(.chat-video){max-width:82vw}.profile-actions{display:grid;grid-template-columns:1fr;width:100%}.profile-actions button{width:100%}}

/* v0.2.6 · Admin cabinet + tasks */
.attach-wrap{position:relative;flex:0 0 auto}.file-btn{font-size:25px;line-height:1;font-weight:300}.attach-menu{position:absolute;left:0;bottom:52px;width:190px;padding:7px;background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);z-index:20}.attach-menu button{width:100%;display:flex;align-items:center;gap:10px;text-align:left;background:transparent;padding:10px 11px;border-radius:10px}.attach-menu button:hover{background:var(--panel2)}.attach-menu button span:first-child{width:22px;text-align:center;font-size:17px}
.task-card{min-width:min(330px,64vw);max-width:min(520px,70vw);display:grid;gap:9px;padding:11px;border:1px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:13px;background:color-mix(in srgb,var(--accent) 7%,var(--panel))}.task-card.completed{opacity:.83;border-color:color-mix(in srgb,#3cab74 35%,var(--line));background:color-mix(in srgb,#3cab74 7%,var(--panel))}.task-card-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.task-label{font-size:12px;font-weight:900;color:var(--accent)}.task-card.completed .task-label{color:#3cab74}.task-status{font-size:10px;font-weight:800;padding:4px 7px;border-radius:999px;background:var(--panel2);border:1px solid var(--line);color:var(--muted)}.task-title{font-size:15px;font-weight:750;line-height:1.42;white-space:pre-wrap;word-break:break-word}.task-assignee,.task-foot{font-size:11px;color:var(--muted)}.task-foot{display:flex;align-items:center;justify-content:flex-end;gap:8px}.task-complete-btn{padding:8px 10px;border-radius:9px;background:linear-gradient(135deg,#2d9f69,#42bb7f);color:#fff;font-size:12px;font-weight:800}.task-create-assignee{padding:11px 13px;border:1px solid var(--line);border-radius:12px;background:var(--panel2);font-size:13px}.task-create-hint{font-size:12px;line-height:1.5;margin:0}
.admin-cabinet{display:grid;grid-template-columns:190px minmax(0,1fr);min-height:470px;gap:16px}.admin-tabs{display:flex;flex-direction:column;gap:7px;padding-right:14px;border-right:1px solid var(--line)}.admin-tab{text-align:left;background:transparent;border:1px solid transparent;padding:11px 12px}.admin-tab:hover{background:var(--panel2)}.admin-tab.active{background:color-mix(in srgb,var(--accent) 10%,var(--panel2));border-color:color-mix(in srgb,var(--accent) 25%,var(--line));color:var(--accent);font-weight:800}.admin-section-host{min-width:0}.admin-section{display:grid;gap:14px}.admin-card{border:1px solid var(--line);border-radius:16px;padding:15px;background:var(--panel2)}.admin-card h4{margin:0}.admin-card-desc{font-size:12px;line-height:1.5;margin:6px 0 13px}.admin-form-grid,.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.admin-form-grid label,.settings-grid label{display:grid;gap:6px;font-size:12px;color:var(--muted)}.admin-form-grid>button{align-self:end}.settings-stat{display:flex;align-items:end;padding:0 3px 10px;color:var(--muted);font-size:12px}.settings-actions{display:flex;gap:9px;margin-top:13px}.toggle-row{grid-column:1/-1!important;display:flex!important;align-items:center;gap:9px;background:var(--panel);border:1px solid var(--line);padding:11px 12px;border-radius:12px}.toggle-row input{width:auto}.toggle-row span{color:var(--text)}.modal-card:has(.admin-cabinet){width:min(1040px,96vw)}
@media(max-width:760px){.attach-menu{left:-2px;width:175px}.task-card{min-width:62vw;max-width:78vw}.admin-cabinet{grid-template-columns:1fr;min-height:0}.admin-tabs{flex-direction:row;overflow-x:auto;padding:0 0 10px;border-right:0;border-bottom:1px solid var(--line)}.admin-tab{white-space:nowrap}.admin-form-grid,.settings-grid{grid-template-columns:1fr}.settings-actions{display:grid;grid-template-columns:1fr}.admin-card{padding:12px}.modal-card:has(.admin-cabinet){width:min(96vw,760px)}}