:root{
  --bg:#f6f6f9;--surface:#ffffff;--surface2:#efeff4;--line:#e3e3ea;--text:#121217;--muted:#6e6e7a;--faint:#a3a3ad;
  --accent:#5b4dff;--accent-ink:#ffffff;--accent-soft:#ecebff;--danger:#e5484d;--ok:#1f9d55;--unread:#5b4dff;
  --shadow:0 8px 30px rgba(18,18,23,.12);--radius:14px;
  --safe-t:env(safe-area-inset-top,0px);--safe-b:env(safe-area-inset-bottom,0px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f0f14;--surface:#18181f;--surface2:#22222b;--line:#2b2b35;--text:#f2f2f6;--muted:#9a9aa8;--faint:#666672;
    --accent:#8b80ff;--accent-ink:#0f0f14;--accent-soft:#25234a;--unread:#8b80ff;--shadow:0 8px 30px rgba(0,0,0,.5);color-scheme:dark}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);
  font:16px/1.4 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,sans-serif;-webkit-text-size-adjust:100%}
body{overscroll-behavior-y:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none;padding:0}
a{color:var(--accent)}
svg{display:block}
.hidden{display:none!important}

/* boot / auth */
.boot{display:grid;place-items:center;height:100vh}
.spinner{width:26px;height:26px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.auth{min-height:100vh;display:flex;flex-direction:column;justify-content:center;padding:calc(var(--safe-t) + 24px) 24px calc(var(--safe-b) + 24px);max-width:440px;margin:0 auto}
.auth .logo{width:72px;height:72px;border-radius:18px;margin-bottom:18px;box-shadow:var(--shadow)}
.auth h1{font-size:30px;margin:0 0 6px;letter-spacing:-.02em}
.auth p{color:var(--muted);margin:0 0 22px}

/* layout */
.view{min-height:100vh;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.8) blur(18px);-webkit-backdrop-filter:saturate(1.8) blur(18px);
  padding:calc(var(--safe-t) + 6px) 12px 6px;border-bottom:1px solid transparent}
.topbar.scrolled{border-bottom-color:var(--line)}
.bar{display:flex;align-items:center;gap:6px;min-height:44px}
.bar .grow{flex:1;min-width:0}
.bar .title{font-weight:650;font-size:17px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.big-title{font-size:32px;font-weight:750;letter-spacing:-.025em;margin:2px 4px 8px}
.icon-btn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--accent);flex:none}
.icon-btn:active{background:var(--surface2)}
.icon-btn svg{width:23px;height:23px}
.text-btn{color:var(--accent);font-weight:600;padding:8px 10px;border-radius:10px;font-size:16px}
.text-btn:disabled{opacity:.4}
.content{flex:1;padding-bottom:calc(var(--safe-b) + 96px)}

/* account chips */
.chips{display:flex;gap:8px;overflow-x:auto;padding:2px 4px 8px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;display:flex;align-items:center;gap:7px;padding:7px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--line);font-size:14px;font-weight:550;white-space:nowrap}
.chip .dot{width:9px;height:9px;border-radius:50%}
.chip .n{font-size:12px;background:var(--surface2);border-radius:999px;padding:0 7px;color:var(--muted)}
.chip.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.chip.on .n{background:rgba(255,255,255,.25);color:inherit}

/* search */
.search{display:flex;align-items:center;gap:8px;background:var(--surface2);border-radius:12px;padding:0 10px;margin:0 4px 8px;height:38px}
.search svg{width:17px;height:17px;color:var(--faint);flex:none}
.search input{border:0;background:none;outline:0;flex:1;min-width:0;height:100%;font-size:16px}

/* message list */
.list{background:var(--surface);margin:0 10px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.row{display:flex;gap:10px;padding:12px 12px 12px 8px;border-bottom:1px solid var(--line);position:relative;background:var(--surface);width:100%;text-align:left}
.row:last-child{border-bottom:0}
.row:active{background:var(--surface2)}
.row .mark{width:10px;flex:none;display:flex;justify-content:center;padding-top:7px}
.row .mark i{width:9px;height:9px;border-radius:50%;background:var(--unread)}
.row .body{flex:1;min-width:0}
.row .l1{display:flex;align-items:baseline;gap:8px}
.row .who{flex:1;min-width:0;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row.read .who{font-weight:500}
.row .when{font-size:13px;color:var(--muted);flex:none}
.row .subj{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:1px}
.row.read .subj{color:var(--muted)}
.row .l3{display:flex;align-items:center;gap:6px;margin-top:4px;font-size:12px;color:var(--muted)}
.row .acc{display:inline-flex;align-items:center;gap:5px;max-width:65%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .acc i{width:7px;height:7px;border-radius:50%;flex:none}
.row .ico{width:14px;height:14px;color:var(--faint)}
.row .flag{color:#f5a524}
.empty{text-align:center;color:var(--muted);padding:60px 24px}
.empty svg{width:48px;height:48px;margin:0 auto 12px;color:var(--faint)}
.more{display:block;margin:14px auto;color:var(--accent);font-weight:600;padding:10px 18px}
.ptr{height:0;overflow:hidden;display:grid;place-items:center;color:var(--muted);font-size:13px;transition:height .2s}
.ptr.show{height:44px}
.errbox{margin:10px;padding:12px 14px;border-radius:12px;background:color-mix(in srgb,var(--danger) 12%,var(--surface));color:var(--text);font-size:14px}

/* fab */
.fab{position:fixed;right:18px;bottom:calc(var(--safe-b) + 20px);width:58px;height:58px;border-radius:18px;background:var(--accent);color:var(--accent-ink);
  display:grid;place-items:center;box-shadow:0 10px 28px color-mix(in srgb,var(--accent) 45%,transparent);z-index:30}
.fab svg{width:26px;height:26px}
.fab:active{transform:scale(.95)}

/* drawer */
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:50;animation:fade .2s}
@keyframes fade{from{opacity:0}}
.drawer{position:fixed;top:0;bottom:0;left:0;width:min(86vw,340px);background:var(--bg);z-index:51;overflow-y:auto;padding:calc(var(--safe-t) + 14px) 12px calc(var(--safe-b) + 20px);animation:slidein .22s ease-out}
@keyframes slidein{from{transform:translateX(-100%)}}
.drawer h3{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:18px 8px 6px;display:flex;align-items:center;gap:8px}
.drawer h3 i{width:9px;height:9px;border-radius:50%}
.navitem{display:flex;align-items:center;gap:12px;width:100%;padding:11px 10px;border-radius:11px;font-size:16px;text-align:left}
.navitem svg{width:20px;height:20px;color:var(--accent);flex:none}
.navitem .n{margin-left:auto;color:var(--muted);font-size:14px}
.navitem.on{background:var(--accent-soft)}
.navitem:active{background:var(--surface2)}

/* reader */
.reader{padding:6px 16px}
.reader h2{font-size:22px;line-height:1.25;margin:4px 0 14px;letter-spacing:-.01em;word-wrap:break-word}
.sender{display:flex;gap:12px;align-items:center;margin-bottom:6px}
.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#fff;flex:none;font-size:16px}
.sender .meta{flex:1;min-width:0}
.sender .name{font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sender .addr{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.recips{font-size:13px;color:var(--muted);margin:6px 0 12px;line-height:1.5;word-break:break-word}
.recips b{color:var(--text);font-weight:550}
.mailframe{width:100%;border:0;display:block;min-height:120px;background:#fff;border-radius:12px}
.frame-wrap{margin:0 -8px;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff}
.atts{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;margin:16px 0}
.att{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.att .thumb{height:96px;background:var(--surface2);display:grid;place-items:center;overflow:hidden}
.att .thumb img{width:100%;height:100%;object-fit:cover}
.att .thumb svg{width:34px;height:34px;color:var(--faint)}
.att .info{padding:8px 10px 4px;min-width:0}
.att .nm{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.att .sz{font-size:12px;color:var(--muted)}
.att .acts{display:flex;border-top:1px solid var(--line);margin-top:6px}
.att .acts button{flex:1;padding:8px 0;color:var(--accent);font-size:13px;font-weight:600}
.att .acts button+button{border-left:1px solid var(--line)}
.toolbar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:6px 6px calc(var(--safe-b) + 6px)}
.toolbar button{display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--accent);font-size:11px;font-weight:550;padding:4px 8px;min-width:58px;border-radius:10px}
.toolbar button svg{width:23px;height:23px}
.toolbar button.danger{color:var(--danger)}
.toolbar button:active{background:var(--surface2)}

/* forms */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);margin:0 10px 14px;overflow:hidden}
.card-h{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:22px 22px 8px}
.field{display:flex;align-items:center;gap:10px;padding:0 14px;min-height:50px;border-bottom:1px solid var(--line)}
.field:last-child{border-bottom:0}
.field label{width:96px;flex:none;color:var(--muted);font-size:15px}
.field input,.field select,.field textarea{flex:1;min-width:0;border:0;background:none;outline:0;padding:13px 0;font-size:16px}
.field textarea{resize:vertical;min-height:70px}
.field.stack{flex-direction:column;align-items:stretch;gap:0;padding-top:10px}
.field.stack label{width:auto;font-size:13px}
.input{width:100%;height:50px;border-radius:13px;border:1px solid var(--line);background:var(--surface);padding:0 14px;font-size:16px;outline:0;margin-bottom:12px}
.input:focus{border-color:var(--accent)}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:50px;border-radius:13px;background:var(--accent);color:var(--accent-ink);font-weight:650;font-size:16px}
.btn:disabled{opacity:.5}
.btn.ghost{background:var(--surface);color:var(--accent);border:1px solid var(--line)}
.btn.danger{background:none;color:var(--danger);border:1px solid var(--line)}
.btn+.btn{margin-top:10px}
.pad{padding:0 10px}
.hint{font-size:13px;color:var(--muted);margin:8px 22px 0;line-height:1.45}
.hint code{font-size:12px;background:var(--surface2);padding:2px 5px;border-radius:5px;word-break:break-all}
.setrow{display:flex;align-items:center;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line);width:100%;text-align:left;min-height:52px}
.setrow:last-child{border-bottom:0}
.setrow .grow{flex:1;min-width:0}
.setrow .sub{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.setrow .dot{width:12px;height:12px;border-radius:50%;flex:none}
.setrow .chev{width:16px;height:16px;color:var(--faint)}
.setrow>svg,.btn>svg{width:20px;height:20px;flex:none}
.setrow .val{color:var(--muted);font-size:15px}
.setrow.action{color:var(--accent);font-weight:550}
.switch{position:relative;width:51px;height:31px;flex:none}
.switch input{opacity:0;width:0;height:0;position:absolute}
.switch span{position:absolute;inset:0;background:var(--line);border-radius:999px;transition:.2s}
.switch span::after{content:"";position:absolute;left:2px;top:2px;width:27px;height:27px;border-radius:50%;background:#fff;box-shadow:0 2px 6px rgba(0,0,0,.2);transition:.2s}
.switch input:checked+span{background:var(--ok)}
.switch input:checked+span::after{transform:translateX(20px)}
.swatches{display:flex;gap:10px;padding:12px 14px;flex-wrap:wrap;border-bottom:1px solid var(--line)}
.swatches button{width:30px;height:30px;border-radius:50%;border:3px solid transparent}
.swatches button.on{border-color:var(--text)}
.pill{display:inline-block;font-size:12px;font-weight:650;padding:3px 9px;border-radius:999px;background:var(--surface2);color:var(--muted)}
.pill.ok{background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok)}
.pill.bad{background:color-mix(in srgb,var(--danger) 14%,transparent);color:var(--danger)}
details.adv summary{padding:14px;color:var(--accent);font-weight:550;list-style:none;cursor:pointer}
details.adv summary::-webkit-details-marker{display:none}
details.adv[open] summary{border-bottom:1px solid var(--line)}

/* compose */
.compose .field label{width:64px}
.compose .from select{appearance:none;-webkit-appearance:none;font-weight:550}
.editor{min-height:240px;padding:14px;outline:0;font-size:16px;line-height:1.5;word-wrap:break-word}
.editor:empty::before{content:attr(data-ph);color:var(--faint)}
.editor blockquote{margin:10px 0 0;padding-left:12px;border-left:3px solid var(--line);color:var(--muted)}
.fmt{display:flex;gap:4px;padding:6px 8px;border-bottom:1px solid var(--line);overflow-x:auto}
.fmt button{min-width:38px;height:34px;border-radius:9px;font-weight:700;color:var(--muted)}
.fmt button:active{background:var(--surface2)}
.attlist{display:flex;flex-wrap:wrap;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line)}
.attchip{display:flex;align-items:center;gap:8px;background:var(--surface2);border-radius:10px;padding:6px 6px 6px 8px;max-width:100%;font-size:13px}
.attchip img{width:30px;height:30px;border-radius:6px;object-fit:cover}
.attchip .nm{max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.attchip .sz{color:var(--muted)}
.attchip button{width:24px;height:24px;border-radius:50%;display:grid;place-items:center;color:var(--muted)}
.addatt{display:flex;gap:10px;padding:10px 14px}
.addatt label{display:flex;align-items:center;gap:7px;padding:9px 14px;border-radius:11px;background:var(--accent-soft);color:var(--accent);font-weight:600;font-size:14px;cursor:pointer}
.addatt label svg{width:18px;height:18px}
.addatt input{display:none}
.progress{height:3px;background:var(--line);position:relative;overflow:hidden}
.progress i{position:absolute;left:0;top:0;bottom:0;background:var(--accent);width:0;transition:width .2s}

/* banners & toast */
.banner{margin:4px 10px 12px;padding:12px 14px;border-radius:14px;background:var(--accent-soft);font-size:14px;display:flex;gap:12px;align-items:center}
.banner b{display:block}
.banner .grow{flex:1}
.banner button{color:var(--accent);font-weight:650;white-space:nowrap}
#toast{position:fixed;left:50%;top:calc(var(--safe-t) + 10px);transform:translate(-50%,-140%);background:var(--text);color:var(--bg);padding:11px 16px;border-radius:14px;
  font-size:14px;font-weight:550;z-index:100;max-width:calc(100vw - 32px);box-shadow:var(--shadow);transition:transform .3s cubic-bezier(.2,.9,.3,1.2);pointer-events:none}
#toast.show{transform:translate(-50%,0)}
#toast.newmail{background:var(--accent);color:var(--accent-ink);pointer-events:auto}
.sheet-wrap{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;background:rgba(0,0,0,.35);animation:fade .2s}
.sheet{background:var(--bg);width:100%;border-radius:18px 18px 0 0;padding:8px 10px calc(var(--safe-b) + 12px);animation:up .25s ease-out;max-height:85vh;overflow:auto}
@keyframes up{from{transform:translateY(100%)}}
.sheet .grab{width:38px;height:5px;border-radius:3px;background:var(--line);margin:4px auto 10px}
.sheet .opt{display:flex;align-items:center;gap:12px;width:100%;padding:14px;background:var(--surface);font-size:16px;border-bottom:1px solid var(--line)}
.sheet .opt:first-of-type{border-radius:14px 14px 0 0}
.sheet .opt:last-of-type{border-radius:0 0 14px 14px;border-bottom:0}
.sheet .opt svg{width:21px;height:21px;color:var(--accent)}
.sheet .opt.danger{color:var(--danger)}
.sheet .opt.danger svg{color:var(--danger)}
.sheet .cancel{margin-top:10px;width:100%;padding:14px;border-radius:14px;background:var(--surface);font-weight:650;color:var(--accent)}
.steps{margin:6px 0 0;padding-left:20px;font-size:14px;line-height:1.6}

@media (min-width:760px){
  .content,.topbar .inner{max-width:760px;margin-left:auto;margin-right:auto;width:100%}
}