:root{--bg:#f4f6f8;--surf:#fff;--ink:#14213d;--mute:#5d6b82;--line:#dde3ea;--acc:#0f7b7d;--acc-ink:#fff;--sel:#e3f1f1;--bad:#b3261e;--warn:#b86e00;color-scheme:light dark}
@media(prefers-color-scheme:dark){:root{--bg:#0e1522;--surf:#16202f;--ink:#e6ebf3;--mute:#93a1b8;--line:#26334a;--acc:#3cc0c2;--acc-ink:#06222a;--sel:#1b3340;--bad:#ff8a80;--warn:#e8a33d}}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding:env(safe-area-inset-top,0) 0 env(safe-area-inset-bottom,0)}
h1,h2,h3{margin:0;font-family:Georgia,"Times New Roman",serif}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
[hidden]{display:none!important}
input,select,textarea{width:100%;background:var(--surf);border:1px solid var(--line);border-radius:6px;padding:8px 10px}
input[type=checkbox]{width:auto}
label{display:block;font-size:13px;font-weight:600;color:var(--mute);margin:12px 0 4px}
.btn{background:var(--acc);color:var(--acc-ink);border:0;border-radius:6px;padding:9px 16px;font-weight:600}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:5px 10px;font-size:13px}
.btn[disabled]{opacity:.6;cursor:wait}
.err{color:var(--bad);font-size:13px;min-height:18px;margin-top:6px}
.ok{color:var(--acc);font-size:13px}
.meta{color:var(--mute);font-size:13px}
.only-m{display:none}
#login{min-height:100%;display:grid;place-items:center;padding:20px}
.card{background:var(--surf);border:1px solid var(--line);border-radius:10px;padding:26px;width:100%;max-width:420px}
.card h1{font-size:28px}.sub{color:var(--mute);margin:4px 0 8px}
#app{display:grid;grid-template-columns:240px 1fr;height:100vh;height:100dvh}
#side{background:var(--surf);border-right:1px solid var(--line);padding:14px 10px;display:flex;flex-direction:column;gap:3px;overflow:auto}
.brand{font:600 22px Georgia,serif;padding:2px 8px 10px}
.label{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--mute);padding:12px 8px 2px}
.nav{display:flex;justify-content:space-between;align-items:center;gap:8px;border:0;background:transparent;text-align:left;padding:7px 10px;border-radius:6px;width:100%}
.nav.on{background:var(--sel);font-weight:600}
.nav .t{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav i{font-style:normal;font-size:12px;color:var(--mute)}
.nav .dot{color:var(--warn);font-weight:700}
.sp{flex:1}
#main{min-width:0;overflow:hidden}
.mail{display:grid;grid-template-columns:350px 1fr;height:100%}
#list{display:flex;flex-direction:column;border-right:1px solid var(--line);overflow:hidden;min-width:0}
.bar{display:flex;gap:8px;padding:10px;border-bottom:1px solid var(--line)}
#items{overflow:auto;flex:1}
.item{display:block;width:100%;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--line);border-left:3px solid transparent;padding:10px 14px}
.item.on{background:var(--sel)}
.item.unread{border-left-color:var(--acc)}.item.unread .from,.item.unread .subj{font-weight:700}
.r1{display:flex;justify-content:space-between;gap:8px}.dt{color:var(--mute);font-size:12px;white-space:nowrap}
.from,.subj{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.empty{padding:36px 20px;color:var(--mute);text-align:center}
#reader{overflow:auto;display:flex;flex-direction:column;padding:20px 26px;background:var(--surf);min-width:0}
#reader h2{font-size:22px;margin-bottom:4px}
.acts{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:12px 0 16px}
.acts select{width:auto}
.plain{white-space:pre-wrap;word-break:break-word;max-width:70ch;margin:0;font:inherit}
.mailbody{flex:1;min-height:320px;width:100%;border:1px solid var(--line);border-radius:6px;background:#fff}
.atts{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}
.page{height:100%;overflow:auto;padding:24px 28px}
.inner{max-width:760px}
.page h2{font-size:24px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.chip{border:1px solid var(--line);background:transparent;border-radius:20px;padding:4px 12px;font-size:13px}
.chip.on{background:var(--acc);color:var(--acc-ink);border-color:var(--acc)}
fieldset{border:1px solid var(--line);border-radius:8px;margin:16px 0;padding:4px 14px 14px}
legend{font-weight:700;padding:0 6px}
.rule{display:flex;gap:10px;align-items:center;border:1px solid var(--line);border-radius:8px;padding:10px 12px;margin-bottom:8px;background:var(--surf)}
.rule .tx{flex:1;font-size:14px;min-width:0}.rule small{display:block;color:var(--mute)}
.rule.off{opacity:.55}
.frow{display:flex;gap:8px;margin-bottom:8px;flex-wrap:wrap;align-items:center}
.frow select{width:auto;max-width:100%}.frow input{flex:1 1 180px;width:auto;min-width:0}
.compose{border:1px solid var(--line);border-radius:10px;background:var(--surf);color:var(--ink);padding:20px;width:min(640px,94vw);max-height:92vh}
.compose::backdrop{background:rgba(5,10,20,.55)}
.compose textarea{min-height:200px;resize:vertical}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
#toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:6px;z-index:50;max-width:90vw}
@media(max-width:860px){
 #app{grid-template-columns:1fr}
 #side{position:fixed;inset:0 18% 0 0;z-index:20;display:none;box-shadow:0 0 40px rgba(0,0,0,.35)}
 #app.menu #side{display:flex}
 .mail{grid-template-columns:1fr}
 #reader{display:none;padding:16px}
 #app.reading #list{display:none}#app.reading #reader{display:flex}
 .only-m{display:inline-block}
 .row{grid-template-columns:1fr}
 .page{padding:16px}
}

.opt{display:block;font-weight:400;color:var(--ink);font-size:15px;margin:8px 0}.opt input{margin-right:6px}