:root{
  --ink:#17191C;--muted:#5B5F66;--line:#E3E1D9;--bg:#F4F3EE;--surf:#FFFFFF;--chip:#EFEEE8;
  --acc:#0B6B53;--acc-d:#07513F;--acc-soft:#E2F0EA;--amb:#8F4705;--amb-soft:#FBEFD9;
  --blu:#2446B8;--blu-soft:#E8EDFB;--red:#A3261B;--red-soft:#FBE7E4;--chat:#EFEDE6;--out:#D9EEE5;
  --display:'Bricolage Grotesque',system-ui,sans-serif;--sans:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);font-size:14px}
a{color:var(--acc)}a:hover{color:var(--acc-d)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{margin:0}
.sr{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* shell */
.app{display:flex;height:100vh;overflow:hidden}
.nav{width:224px;flex-shrink:0;background:var(--ink);color:#fff;display:flex;flex-direction:column;padding:20px 12px;gap:4px}
.brand{display:flex;align-items:center;gap:10px;padding:0 8px 20px;font-family:var(--display);font-weight:700;font-size:17px}
.brand .logo{width:32px;height:32px;border-radius:9px;background:var(--acc);display:flex;align-items:center;justify-content:center}
.nav a{display:flex;align-items:center;gap:12px;height:40px;padding:0 12px;border-radius:8px;text-decoration:none;color:#B9BCC2;font-weight:500}
.nav a:hover{background:#23272B;color:#fff}
.nav a.on{background:#2A2E33;color:#fff}
.nav .badge{margin-left:auto;font-size:12px;font-weight:600;background:var(--acc);color:#fff;border-radius:10px;padding:1px 7px}
.nav .grow{flex-grow:1}
.me{display:flex;align-items:center;gap:10px;padding:12px 8px 0;border-top:1px solid #2E3237;margin-top:8px}
.me .av{width:34px;height:34px;border-radius:17px;background:#3A3F46;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0}
.me small{display:block;color:#9EA2A9;font-size:12px}
.me form{margin-left:auto}
.me button{background:none;border:0;color:#9EA2A9;cursor:pointer;padding:6px;border-radius:6px}
.me button:hover{color:#fff;background:#2A2E33}
.main{flex-grow:1;overflow:auto;padding:32px 36px;display:flex;flex-direction:column;gap:24px;min-width:0}
.main>*{flex-shrink:0}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.head h1{font-family:var(--display);font-size:30px;font-weight:700;letter-spacing:-.02em}
.head p{margin:6px 0 0;color:var(--muted)}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* controls */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 16px;border-radius:8px;font-weight:500;cursor:pointer;background:var(--surf);color:var(--ink);border:1px solid var(--line);text-decoration:none;white-space:nowrap}
.btn:hover{border-color:#C9C6BC;color:var(--ink)}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#fff}
.btn.primary:hover{background:var(--acc-d);color:#fff}
.btn.danger{color:var(--red)}
.btn.sm{height:32px;padding:0 10px;font-size:13px}
.btn:disabled{opacity:.5;cursor:default}
.icon-btn{width:40px;height:40px;border-radius:8px;border:1px solid var(--line);background:var(--surf);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);flex-shrink:0}
.icon-btn:hover{border-color:#C9C6BC}
.icon-btn.go{background:var(--acc);border-color:var(--acc);color:#fff}
.field{display:flex;flex-direction:column;gap:6px;font-weight:500;font-size:13px}
.field small{font-weight:400;color:var(--muted)}
.input,select.input,textarea.input{height:40px;border:1px solid var(--line);border-radius:8px;padding:0 12px;background:var(--surf);width:100%}
textarea.input{height:auto;padding:10px 12px;resize:vertical}
.input:focus,textarea:focus,select:focus{outline:2px solid var(--acc);outline-offset:-1px;border-color:var(--acc)}
.mono{font-family:var(--mono)}
.check{display:flex;gap:10px;align-items:center;font-size:13px;font-weight:400}
.check input{width:16px;height:16px;accent-color:var(--acc)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:1100px){.grid2,.grid3{grid-template-columns:minmax(0,1fr)}}

.card{background:var(--surf);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:14px}
.card h2{font-size:16px;font-weight:600}
.card p{margin:0;color:var(--muted);line-height:1.5}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:500;border-radius:6px;padding:2px 8px;white-space:nowrap;background:var(--chip);color:var(--muted)}
.pill.ok{background:var(--acc-soft);color:var(--acc)}
.pill.warn{background:var(--amb-soft);color:var(--amb)}
.pill.err{background:var(--red-soft);color:var(--red)}
.pill.bot{background:var(--blu-soft);color:var(--blu)}
.dot{width:7px;height:7px;border-radius:4px;background:currentColor;display:inline-block}
.alert{display:flex;gap:12px;align-items:flex-start;border-radius:10px;padding:12px 16px;line-height:1.45}
.alert.ok{background:var(--acc-soft);color:#0A4F3E}
.alert.erro,.alert.err{background:var(--red-soft);color:var(--red)}
.alert.warn{background:var(--amb-soft);color:var(--amb);border:1px solid #F1DDB8}
.alert.info{background:var(--blu-soft);color:var(--blu)}
pre.code{margin:0;background:var(--ink);color:#E6E4DC;border-radius:8px;padding:12px;font-family:var(--mono);font-size:12px;line-height:1.5;overflow:auto;white-space:pre-wrap;word-break:break-word}
code{font-family:var(--mono);font-size:12.5px;background:var(--chip);padding:1px 5px;border-radius:4px}

table.tbl{width:100%;border-collapse:collapse;background:var(--surf)}
.tbl-wrap{background:var(--surf);border:1px solid var(--line);border-radius:12px;overflow:auto}
.tbl th{text-align:left;font-size:12px;font-weight:600;color:var(--muted);padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl .sub{font-size:12px;color:var(--muted)}
.tbl form{display:inline}
.switch{position:relative;width:36px;height:20px;border-radius:10px;border:0;background:#CFCDC5;padding:0;cursor:pointer;vertical-align:middle}
.switch span{position:absolute;top:2px;left:2px;width:16px;height:16px;border-radius:8px;background:#fff;transition:left .15s}
.switch[aria-checked=true]{background:var(--acc)}
.switch[aria-checked=true] span{left:18px}
details.more summary{cursor:pointer;color:var(--acc);font-weight:500;list-style:none}
details.more summary::-webkit-details-marker{display:none}

/* auth pages */
.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.auth{width:100%;max-width:420px;background:var(--surf);border:1px solid var(--line);border-radius:14px;padding:32px;display:flex;flex-direction:column;gap:18px}
.auth.wide{max-width:720px}
.auth h1{font-family:var(--display);font-size:26px;letter-spacing:-.02em}
.req{display:flex;flex-direction:column;gap:6px;font-size:13px}
.req span.ok{color:var(--acc)}.req span.no{color:var(--red);font-weight:600}

/* inbox */
.inbox{display:flex;flex-grow:1;min-width:0;height:100vh}
.list{width:372px;flex-shrink:0;background:var(--surf);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.list-top{padding:20px 16px 12px;display:flex;flex-direction:column;gap:12px;border-bottom:1px solid var(--line)}
.list-top h1{font-family:var(--display);font-size:24px;letter-spacing:-.02em}
.search{display:flex;align-items:center;gap:8px;height:38px;border:1px solid var(--line);border-radius:8px;padding:0 10px;color:var(--muted)}
.search input{border:0;outline:none;flex-grow:1;background:transparent;color:var(--ink)}
.tabs{display:flex;gap:4px;background:#F1F0EA;border-radius:8px;padding:3px}
.tabs button{flex:1;height:32px;border:0;border-radius:6px;background:transparent;font-size:12.5px;color:var(--muted);cursor:pointer;white-space:nowrap}
.tabs button[aria-selected=true]{background:var(--surf);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.convs{flex-grow:1;overflow-y:auto}
.conv{display:flex;gap:12px;padding:12px 16px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line);cursor:pointer;background:none;border-left:0;border-right:0;border-top:0;width:100%;text-align:left}
.conv:hover{background:#FAF9F6}
.conv.on{background:var(--acc-soft)}
.av{width:40px;height:40px;flex-shrink:0;border-radius:20px;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600}
.av.c0{background:#DCEBE4;color:var(--acc)}.av.c1{background:var(--blu-soft);color:var(--blu)}.av.c2{background:var(--amb-soft);color:var(--amb)}.av.c3{background:#F0E6F4;color:#6B2F86}
.conv .body{flex-grow:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.conv .l1,.conv .l2{display:flex;justify-content:space-between;gap:8px;align-items:center}
.conv .name{font-weight:600}
.conv .time{font-size:12px;color:var(--muted);flex-shrink:0}
.conv .prev{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv .unread{min-width:20px;height:20px;border-radius:10px;background:var(--acc);color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;padding:0 6px}
.conv .tags{display:flex;gap:6px;margin-top:2px;flex-wrap:wrap}
.empty{padding:40px 24px;text-align:center;color:var(--muted);line-height:1.5}

.chat{flex-grow:1;min-width:0;display:flex;flex-direction:column;background:var(--chat)}
.chat-head{height:72px;flex-shrink:0;background:var(--surf);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:0 20px}
.chat-head .who{display:flex;flex-direction:column;gap:2px;flex-grow:1;min-width:120px}
.chat-head .who b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-head .btn{height:36px;padding:0 12px;font-size:13px;gap:6px}
@media (max-width:1500px){.chat-head .btn .t{display:none}.chat-head .btn{width:36px;padding:0}}
.chat-head .who b{font-size:16px;font-weight:600}
.chat-head .who span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.window{display:flex;align-items:center;gap:8px;padding:8px 20px;font-size:13px;border-bottom:1px solid var(--line)}
.window.open{background:var(--acc-soft);color:#0A4F3E}
.window.closed{background:var(--amb-soft);color:var(--amb)}
.msgs{flex-grow:1;overflow-y:auto;padding:20px 28px;display:flex;flex-direction:column;gap:8px}
.day{align-self:center;font-size:12px;color:var(--muted);background:#E4E2DA;border-radius:6px;padding:4px 10px;margin:6px 0}
.sys{align-self:center;font-size:12px;color:var(--muted);background:#ECEAE3;border-radius:6px;padding:4px 10px;text-align:center;max-width:80%}
.b{max-width:64%;border-radius:12px;padding:8px 12px;display:flex;flex-direction:column;gap:3px;border:1px solid var(--line);background:var(--surf);align-self:flex-start;word-wrap:break-word;overflow-wrap:anywhere}
.b.out{align-self:flex-end;background:var(--out);border-color:#C7E3D6}
.b.bot{background:var(--blu-soft);border-color:#D3DCF6}
.b.note{align-self:flex-end;background:var(--amb-soft);border-color:#F1DDB8}
.b .by{font-size:12px;font-weight:600;color:var(--acc);display:flex;gap:5px;align-items:center}
.b.bot .by{color:var(--blu)}.b.note .by{color:var(--amb)}
.b .txt{line-height:1.45;white-space:pre-wrap}
.b .meta{align-self:flex-end;font-size:11px;color:var(--muted);display:flex;gap:4px;align-items:center}
.b .meta .read{color:#2F7BD6}
.b .fail{font-size:12px;color:var(--red)}
.b img.media{max-width:280px;max-height:320px;border-radius:8px;display:block;cursor:zoom-in}
.b video{max-width:300px;border-radius:8px}
.b audio{width:260px}
.file{display:flex;gap:10px;align-items:center;background:#fff;border-radius:8px;padding:10px;text-decoration:none;color:var(--ink);border:1px solid var(--line)}
.file .ext{width:36px;height:44px;border-radius:6px;background:var(--red-soft);color:var(--red);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;flex-shrink:0;text-transform:uppercase}
.file .fn{font-weight:500;word-break:break-all}
.composer{background:var(--surf);border-top:1px solid var(--line);padding:10px 20px 16px;display:flex;flex-direction:column;gap:8px}
.composer .mode{display:flex;gap:16px}
.composer .mode button{border:0;background:transparent;padding:0 0 6px;font-size:13px;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;display:flex;gap:6px;align-items:center}
.composer .mode button[aria-selected=true]{color:var(--acc);font-weight:600;border-color:var(--acc)}
.composer.note .mode button[aria-selected=true]{color:var(--amb);border-color:var(--amb)}
.composer .line{display:flex;gap:8px;align-items:flex-end}
.composer textarea{flex-grow:1;min-height:44px;max-height:160px;resize:none;border:1px solid var(--line);border-radius:8px;padding:11px 12px;line-height:1.4}
.composer.note textarea{background:#FFFBF2}
.attach-preview{display:flex;gap:8px;align-items:center;font-size:13px;background:var(--chip);border-radius:8px;padding:6px 10px}
.side{width:300px;flex-shrink:0;background:var(--surf);border-left:1px solid var(--line);display:flex;flex-direction:column;padding:24px 20px;gap:18px;overflow-y:auto}
.side .who{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}
.side .who .av{width:64px;height:64px;border-radius:32px;font-size:22px}
.kv{display:flex;flex-direction:column;gap:10px;font-size:13px}
.kv div{display:flex;justify-content:space-between;gap:10px}
.kv span:first-child{color:var(--muted)}
.kv span:last-child{font-weight:500;text-align:right}
.lbl{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}
.placeholder{flex-grow:1;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;color:var(--muted);text-align:center;padding:40px}
.placeholder h2{font-family:var(--display);color:var(--ink);font-size:22px}

dialog{border:0;border-radius:14px;padding:0;width:min(520px,calc(100vw - 32px));box-shadow:0 20px 60px rgba(0,0,0,.25)}
dialog::backdrop{background:rgba(23,25,28,.45)}
dialog form,dialog .dlg{padding:24px;display:flex;flex-direction:column;gap:14px}
dialog h2{font-family:var(--display);font-size:20px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;font-size:13px;z-index:50;max-width:90vw}
.toast.err{background:var(--red)}
.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}

@media (max-width:1200px){.side{display:none}}
@media (max-width:900px){.nav{width:64px;padding:16px 8px}.nav a span,.brand span,.me div,.nav .badge{display:none}.list{width:300px}}