:root{--bg:#f3f5f8;--card:#fff;--fg:#1d2330;--muted:#6b7385;--line:#e3e7ee;--accent:#1f6feb;--accent-fg:#fff;--danger:#c62828;--unread:#eef4ff;--hover:#f6f8fb}
@media (prefers-color-scheme:dark){:root{--bg:#14171c;--card:#1d2129;--fg:#e6e9ef;--muted:#9aa3b5;--line:#2c323d;--accent:#4c8dff;--accent-fg:#fff;--danger:#ff6b6b;--unread:#1f2a3d;--hover:#232833}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.45 -apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.muted{color:var(--muted)}.small{font-size:13px}
input,select,textarea,button{font:inherit;color:inherit}
input[type=email],input[type=password],input[type=search],input:not([type]),select,textarea{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}
textarea{resize:vertical;min-height:260px;font-family:inherit;line-height:1.5}
.btn{display:inline-block;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:7px 12px;cursor:pointer;color:var(--fg);white-space:nowrap}
.btn:hover{background:var(--hover);text-decoration:none}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
.btn.danger{color:var(--danger)}
button.link{background:none;border:0;color:var(--accent);cursor:pointer;padding:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px}
.flash{padding:10px 14px;border-radius:8px;margin:0 0 12px;background:#e7f6ec;color:#1b5e20;border:1px solid #b9e2c4}
.flash.err{background:#fdecea;color:#8e1c1c;border-color:#f5c2c0}
.notice{padding:8px 12px;background:var(--unread);border-radius:8px;margin:10px 0;font-size:14px}

/* вход */
main.center{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:16px}
.login{width:100%;max-width:360px;padding:28px;display:flex;flex-direction:column;gap:14px}
.login h1{margin:0 0 6px;font-size:22px;text-align:center}
.login label{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}

/* рамка */
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:700;color:var(--fg);white-space:nowrap}
.search{flex:1;max-width:520px}
.user{display:flex;gap:12px;align-items:center;font-size:14px;color:var(--muted);margin-left:auto}
.user form{margin:0}
.menu-btn{display:none;background:none;border:0;font-size:22px;cursor:pointer;padding:0 4px}
.wrap{display:flex;gap:16px;padding:16px;max-width:1400px;margin:0 auto}
.side{width:220px;flex-shrink:0}
.side .compose{display:block;text-align:center;margin-bottom:12px;padding:10px}
.folders{list-style:none;margin:0 0 12px;padding:0}
.folders a{display:flex;align-items:center;gap:6px;padding:7px 10px;border-radius:8px;color:var(--fg)}
.folders a:hover{background:var(--hover);text-decoration:none}
.folders a.on{background:var(--unread);font-weight:600}
.folders .ic{width:20px;text-align:center}
.badge{margin-left:auto;background:var(--accent);color:var(--accent-fg);border-radius:10px;padding:0 7px;font-size:12px}
main{flex:1;min-width:0}

/* списък */
.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px}
.toolbar h2{margin:0 auto 0 0;font-size:20px}
.toolbar select{width:auto}
.toolbar form.inline{display:flex;flex-wrap:wrap;gap:8px;margin:0}
.chk{display:flex;align-items:center;gap:6px;font-size:14px}
.mlist{list-style:none;margin:0;padding:0;overflow:hidden}
.mlist li{display:flex;align-items:center;gap:10px;padding:0 12px;border-bottom:1px solid var(--line)}
.mlist li:last-child{border-bottom:0}
.mlist li:hover{background:var(--hover)}
.mlist li.unread{background:var(--unread)}
.mlist li.unread .who,.mlist li.unread .subj{font-weight:700}
.mlist a{flex:1;min-width:0;display:flex;gap:12px;padding:11px 0;color:var(--fg)}
.mlist a:hover{text-decoration:none}
.mlist .who{width:220px;flex-shrink:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mlist .subj{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mlist .date{flex-shrink:0;color:var(--muted);font-size:13px}
.empty{padding:40px;text-align:center;color:var(--muted)}
.pager{display:flex;justify-content:center;align-items:center;gap:12px;margin:14px 0}

/* писмо */
.message{padding:20px}
.message h1{margin:0 0 12px;font-size:21px}
.meta{display:grid;grid-template-columns:max-content 1fr;gap:4px 12px;margin:0 0 14px;font-size:14px}
.meta dt{color:var(--muted)}.meta dd{margin:0;word-break:break-word}
.atts{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;align-items:center}
.chip{display:inline-flex;gap:6px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:4px 10px;font-size:14px}
.body-frame{width:100%;min-height:300px;border:1px solid var(--line);border-radius:8px;background:#fff}
.body-text{white-space:pre-wrap;word-wrap:break-word;font:14px/1.55 ui-monospace,Consolas,monospace;margin:8px 0}
details{margin-top:14px}summary{cursor:pointer;color:var(--muted)}

/* писане */
.compose-form{padding:18px;display:flex;flex-direction:column;gap:10px}
.compose-form .row{display:flex;align-items:center;gap:10px}
.compose-form .row>label{width:70px;flex-shrink:0;color:var(--muted);font-size:14px}
.compose-form .from{display:flex;align-items:center;gap:8px;flex:1}
.compose-form .from input{max-width:240px}
.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* телефон */
@media (max-width:800px){
  .menu-btn{display:block}
  .user span{display:none}
  .wrap{padding:10px;gap:0}
  .side{position:fixed;top:56px;left:0;bottom:0;background:var(--card);padding:12px;border-right:1px solid var(--line);transform:translateX(-100%);transition:transform .2s;z-index:4;overflow:auto}
  body.nav-open .side{transform:none}
  .mlist a{flex-direction:column;gap:2px}
  .mlist .who{width:auto}
  .mlist .date{order:-1;align-self:flex-end;margin-bottom:-20px}
  .compose-form .row{flex-direction:column;align-items:stretch;gap:4px}
  .compose-form .row>label{width:auto}
  .brand{display:none}
}