:root{font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;color:#172642;background:#f5f8fc;--blue:#2166f3;--blue-soft:#edf3ff;--line:#dfe7f2;--muted:#7e8ca5;--nav:302px}*{box-sizing:border-box}body{margin:0;min-width:0;background:#f5f8fc}button,input,select,textarea{font:inherit}button{cursor:pointer}.mail-shell{height:100vh;min-height:700px;display:grid;grid-template-columns:var(--nav) minmax(0,1fr);overflow:hidden}.mail-nav{overflow-y:auto;padding:20px;background:#fff;border-right:1px solid var(--line)}.mail-brand{display:flex;align-items:center;gap:14px;height:74px;padding:0 20px 18px;border-bottom:1px solid #e9eef6}.mail-brand img{width:48px;height:48px;object-fit:contain}.mail-brand strong{display:block;font-size:21px}.mail-brand small{display:block;margin-top:6px;color:#7990b1;font-size:11px;letter-spacing:.12em;font-weight:700}.nav-group{margin:16px 14px 8px;color:#8fa0ba;font-size:13px}.mail-nav nav{display:grid;gap:4px}.mail-nav a{display:flex;align-items:center;gap:15px;min-height:45px;padding:0 15px;border-radius:11px;color:#5e7291;text-decoration:none;font-size:16px}.mail-nav a.active{background:#eaf0ff;color:var(--blue);font-weight:750}.mail-nav svg,.global-search svg,.mail-search svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}.mail-workspace{min-width:0;display:grid;grid-template-rows:70px 70px 78px minmax(0,1fr);overflow:hidden}.topbar{display:flex;align-items:center;gap:12px;padding:0 26px;background:#fff;border-bottom:1px solid var(--line)}.global-search{display:flex;align-items:center;gap:11px;width:min(450px,34vw);height:44px;padding:0 14px;border:1px solid #dbe4f1;border-radius:12px;color:#8fa0b7;background:#fbfcff}.global-search input{min-width:0;flex:1;border:0;outline:0;background:transparent}.global-search kbd{padding:3px 7px;border:1px solid #dde5ef;border-radius:6px;background:#fff;color:#8d9db3;font-size:11px}.top-actions{display:flex;gap:8px;margin-left:auto}.top-actions button{height:40px;padding:0 13px;border:1px solid #dce5f1;border-radius:10px;background:#fff;color:#40516b;font-weight:650}.top-actions button:first-child{color:var(--blue);background:#f4f7ff}.notification{font-size:23px;color:#50627f}.avatar{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:#e4f4fa;color:#285d8e;font-size:18px;font-weight:800}.admin{white-space:nowrap;font-size:14px}.menu-button{display:none;border:0;background:transparent;font-size:20px}.page-title{display:flex;align-items:center;justify-content:space-between;padding:0 26px;border-bottom:1px solid var(--line);background:#f8fbff}.page-title h1{margin:0;font-size:27px}.page-title p{margin:0;padding:8px 13px;border:1px solid #dce6f3;border-radius:9px;color:#62728a;background:#f7faff;font-size:13px}.mail-toolbar{display:flex;align-items:center;gap:16px;padding:13px 26px;background:#fff;border-bottom:1px solid var(--line)}.mail-toolbar>label:not(.mail-search){display:flex;align-items:center;gap:10px;color:#71819a;font-size:13px}.mail-toolbar select{height:44px;min-width:210px;padding:0 38px 0 14px;border:1px solid #d7e2f1;border-radius:10px;background:#fff;color:#263752;font-weight:650}.account-state{display:flex;align-items:center;gap:7px;color:#247250;font-size:12px;font-weight:700}.account-state i{width:9px;height:9px;border-radius:50%;background:#2eaf75}.account-state.error{color:#9f4b45}.account-state.error i{background:#d8665e}.mail-search{margin-left:auto;display:flex;align-items:center;gap:10px;width:min(480px,33vw);height:44px;padding:0 14px;border:1px solid #d9e3f0;border-radius:10px;color:#8ba0ba}.mail-search input{min-width:0;flex:1;border:0;outline:0;background:transparent}.primary{border:0!important;background:var(--blue)!important;color:#fff!important;font-weight:750}.mail-toolbar>.primary{height:44px;padding:0 23px;border-radius:10px;white-space:nowrap}.mail-main{min-height:0;display:grid;grid-template-columns:260px 390px minmax(440px,1fr);gap:0;margin:0 16px 16px;border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden}.folders{padding:14px;border-right:1px solid var(--line);overflow-y:auto}.folder{display:grid;grid-template-columns:26px minmax(0,1fr) auto;align-items:center;width:100%;min-height:48px;padding:0 13px;border:0;border-radius:10px;background:transparent;color:#526784;text-align:left}.folder.active{background:#eaf1ff;color:var(--blue);font-weight:750}.folder b{display:grid;place-items:center;min-width:25px;height:23px;padding:0 7px;border-radius:12px;background:#edf1f7;color:#687995;font-size:12px}.folder.active b{background:#fff;color:var(--blue)}.sync-card{display:grid;gap:8px;margin-top:22px;padding:15px;border:1px solid #e0e8f3;border-radius:11px;background:#f8fbff}.sync-card span{color:#28734f;font-size:13px}.sync-card small{color:var(--muted);line-height:1.5}.sync-card button{padding:8px;border:1px solid #d5e1f0;border-radius:8px;background:#fff;color:#466080}.mail-list-pane{min-width:0;display:grid;grid-template-rows:58px minmax(0,1fr) 50px;border-right:1px solid var(--line)}.mail-list-pane>header,.pagination{display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--line)}.mail-list-pane>header span,.pagination{color:var(--muted);font-size:12px}.mail-list{overflow-y:auto}.mail-row{position:relative;width:100%;display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:11px;padding:16px 16px;border:0;border-bottom:1px solid #edf1f6;background:#fff;color:inherit;text-align:left}.mail-row:hover,.mail-row.selected{background:#f3f7ff}.mail-row.unread:before{content:"";position:absolute;left:5px;top:50%;width:6px;height:6px;border-radius:50%;background:var(--blue)}.sender-avatar{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:#e3edff;color:#174ca6;font-size:18px;font-weight:800}.mail-summary{min-width:0}.mail-summary strong,.mail-summary b,.mail-summary span{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mail-summary strong{font-size:14px}.mail-summary b{margin-top:4px;font-size:13px}.mail-summary span{margin-top:5px;color:#6f7f97;font-size:12px}.mail-meta{text-align:right;color:#8899b1;font-size:11px}.mail-meta em{display:block;margin-top:10px;color:#587397;font-style:normal}.pagination{border-top:1px solid var(--line);border-bottom:0}.pagination button{padding:6px 10px;border:1px solid #dbe4f0;border-radius:7px;background:#fff;color:#516784}.pagination button:disabled{opacity:.45;cursor:not-allowed}.mail-detail{min-width:0;padding:24px;overflow-y:auto}.detail-empty{min-height:100%;display:grid;place-content:center;gap:9px;text-align:center;color:var(--muted)}.detail-empty strong{color:#4c5d76;font-size:18px}.detail-head{display:flex;justify-content:space-between;gap:18px;padding-bottom:16px;border-bottom:1px solid #e7edf5}.detail-head h2{margin:0;font-size:23px}.detail-head p{margin:7px 0 0;color:var(--muted);font-size:12px}.detail-actions{display:flex;gap:8px}.detail-actions button{height:36px;padding:0 12px;border:1px solid #d9e3ef;border-radius:8px;background:#fff;color:#47617f}.sender-card{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:12px;align-items:center;padding:16px 0}.sender-card b,.sender-card span{display:block}.sender-card span{margin-top:3px;color:#7e8da4;font-size:12px}.sender-card time{color:#8a99af;font-size:11px}.mail-body{min-height:170px;padding:16px 0;color:#253550;line-height:1.75;white-space:pre-wrap}.safe-html{white-space:normal}.safe-html img[data-remote-blocked]{display:inline-block;width:120px;height:26px;border:1px dashed #d4deea;background:#f7f9fc}.attachments{display:grid;gap:8px;margin-top:16px}.attachment{display:grid;grid-template-columns:40px minmax(0,1fr) auto;gap:11px;align-items:center;padding:11px;border:1px solid #dce5f1;border-radius:10px;background:#fbfdff}.attachment i{display:grid;place-items:center;width:38px;height:38px;border-radius:8px;background:#ffe8e8;color:#d33;font-style:normal}.attachment b,.attachment span{display:block}.attachment span{margin-top:3px;color:var(--muted);font-size:11px}.attachment button{border:1px solid #dce5f1;border-radius:7px;background:#fff;color:#6b7d96}.thread{margin-top:18px;padding-top:14px;border-top:1px solid #e5ebf3}.thread summary{cursor:pointer;color:#48617f;font-weight:700}.thread-item{margin-top:10px;padding:12px;border:1px solid #e2e9f2;border-radius:9px;background:#f9fbfe}.thread-item p{margin:5px 0 0;color:#64758f;font-size:12px}.compose-dialog{width:min(680px,calc(100vw - 28px));border:0;border-radius:15px;box-shadow:0 24px 80px #1e365f42;padding:0}.compose-dialog::backdrop{background:#17294566}.compose-dialog form{display:grid;gap:13px;padding:22px}.compose-dialog header{display:flex;justify-content:space-between;align-items:flex-start}.compose-dialog h2{margin:0}.compose-dialog header p{margin:5px 0 0;color:var(--muted);font-size:12px}.compose-dialog header button{border:0;background:transparent;font-size:26px;color:#78879d}.compose-dialog label{display:grid;gap:6px;color:#50617a;font-size:12px}.compose-dialog input,.compose-dialog textarea{width:100%;padding:10px;border:1px solid #d9e2ef;border-radius:8px;outline-color:var(--blue)}.compose-dialog textarea{min-height:180px;resize:vertical}.compose-dialog footer{display:flex;justify-content:flex-end;gap:9px}.compose-dialog footer button{padding:10px 16px;border:1px solid #d6e0ed;border-radius:8px;background:#fff;color:#465b77}.compose-dialog output{min-height:18px;color:#2b7252;font-size:12px}.attachment-input small{color:var(--muted)}.attachment-preview{padding:10px;border-radius:8px;background:#f3f7fc;color:#50637f;font-size:12px}.loading,.empty-list{padding:40px 20px;text-align:center;color:var(--muted)}
@media(max-width:1200px){:root{--nav:235px}.top-actions button:nth-child(n+3){display:none}.mail-main{grid-template-columns:220px 330px minmax(400px,1fr)}.mail-toolbar select{min-width:160px}.admin{display:none}}
@media(max-width:780px){.mail-shell{display:block;overflow:auto}.mail-nav{position:fixed;z-index:10;inset:0 auto 0 0;width:245px;transform:translateX(-100%);transition:.18s;box-shadow:12px 0 36px #19345a33}.nav-open .mail-nav{transform:translateX(0)}.mail-workspace{height:auto;min-height:100vh;display:grid;grid-template-rows:58px auto auto auto;overflow:visible}.topbar{height:58px;padding:0 12px}.menu-button{display:block}.global-search{width:210px}.global-search kbd,.top-actions,.notification,.admin{display:none}.page-title{min-height:64px;padding:10px 14px}.page-title h1{font-size:22px}.page-title p{font-size:11px}.mail-toolbar{display:grid;grid-template-columns:1fr 1fr;padding:12px 14px;gap:10px}.mail-toolbar>label:not(.mail-search){display:grid;gap:5px}.mail-toolbar select{width:100%;min-width:0}.account-state{align-self:end;min-height:44px}.mail-search{grid-column:1/-1;width:100%;margin:0}.mail-toolbar>.primary{grid-column:1/-1}.mail-main{display:grid;grid-template-columns:180px minmax(260px,1fr) minmax(360px,1.4fr);min-height:620px;overflow:auto;margin:0 10px 12px}.folders{padding:8px}.mail-detail{padding:17px}.compose-dialog form{padding:16px}}

/* Mail workspace layout, scoped to this page. */
.mail-toolbar { gap: 12px; align-items: center; }
.mail-toolbar h1 { font-size: 22px; margin: 0 12px 0 0; white-space: nowrap; }
.mail-toolbar select { max-width: 220px; }
.mail-toolbar .mail-search { min-width: 160px; }
.mail-main { grid-template-columns: minmax(150px, 184px) minmax(260px, 350px) minmax(0, 1fr); }
.mail-main.mail-list-mode { grid-template-columns: minmax(150px, 184px) minmax(0, 1fr); }
.mail-main.mail-list-mode .mail-detail { display: none; }
.mail-list-pane > header { gap: 8px; }
#resultCount { margin-left: auto; white-space: nowrap; }
#mailViewToggle { white-space: nowrap; padding: 5px 8px; }
.mail-sync { display: grid; gap: 5px; padding: 10px; margin-top: 12px; color: #50627c; font-size: 12px; }
.mail-sync :empty { display: none; }
.mail-sync button { justify-self: start; }
#mailList .error-state { text-align: left; margin: 16px; padding: 16px; color: #334766; }
#mailList .error-state p { line-height: 1.5; }
#mailDetail { min-width: 0; overflow-wrap: anywhere; }
@media (max-width: 1250px) {
  .mail-toolbar { flex-wrap: wrap; }
  .mail-main { grid-template-columns: minmax(120px, 155px) minmax(220px, 290px) minmax(0, 1fr); }
}
@media (max-width: 860px) {
  .mail-main, .mail-main.mail-list-mode { grid-template-columns: minmax(0, 1fr); }
  .mail-main .folders { display: flex; overflow-x: auto; }
  .mail-main .mail-sync { display: none; }
}