:root{--bg:#3b3b3b;--bg2:#2f2f2f;--rib:#e1e1e1;--ribt:#222;--pane:#3a3a3a;--list:#d9d9d9;--sel:#b4d6f0;--acc:#4a9be8;--txt:#eee;--mut:#aaa}
*{box-sizing:border-box;margin:0;padding:0}
body{font:14px "Segoe UI",system-ui,sans-serif;background:var(--bg);color:var(--txt);height:100vh;display:flex;flex-direction:column;overflow:hidden}
.top{display:flex;align-items:center;height:44px;padding:0 12px;gap:12px;background:#444}
.top .logo{width:24px;height:24px;background:#0f6cbd;border-radius:4px;color:#fff;font-weight:700;display:grid;place-items:center}
.top{-webkit-user-select:none;user-select:none;padding-right:0}
.top .tb{cursor:pointer;opacity:.85;font-size:18px}.top .tb:hover{opacity:1}
.wc{display:flex;height:100%;margin-left:6px}
.wb{width:46px;display:grid;place-items:center;cursor:pointer;font-size:14px}
.wb:hover{background:#5a5a5a}.wb.x:hover{background:#c42b1c}
html:fullscreen .top{padding-right:0}
.search{flex:0 1 640px;margin:0 auto}
.search input{width:100%;height:30px;border-radius:5px;border:1px solid #888;background:#bdbdbd;padding:0 12px;font-size:15px}
.avatar{width:28px;height:28px;border-radius:50%;background:#7fb5b5;color:#222;display:grid;place-items:center;font-size:12px}
.tabs{display:flex;gap:4px;padding:6px 12px 0 60px;background:#444;align-items:center}
.tabs button{background:none;border:0;color:var(--txt);font-size:15px;padding:6px 12px;cursor:pointer;border-bottom:2px solid transparent}
.tabs button.on{border-color:var(--acc);font-weight:600}
.tabs .sp{flex:1}
.toggle{width:40px;height:20px;border-radius:10px;border:1px solid #ccc;position:relative;margin-left:8px;display:inline-block;vertical-align:middle}
.toggle:after{content:"";position:absolute;left:3px;top:3px;width:12px;height:12px;border-radius:50%;background:#fff}
.ribbon{margin:0 6px;background:var(--rib);color:var(--ribt);border-radius:6px;display:flex;height:98px;padding:4px 6px;overflow-x:auto;white-space:nowrap}
.grp{display:flex;flex-direction:column;border-right:1px solid #bbb;padding:0 8px;min-width:max-content}
.grp:last-child{border:0}
.grp .btns{flex:1;display:flex;align-items:flex-start;gap:2px}
.grp .gl{text-align:center;font-size:12px;color:#444;padding-top:2px}
.rb{background:none;border:0;display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 6px;border-radius:4px;cursor:pointer;color:var(--ribt);font-size:13px;line-height:1.15;text-align:center;min-width:48px}
.rb:hover{background:#cfcfcf}.rb:disabled{opacity:.4;cursor:default}
.rb .ic{font-size:26px;height:32px;display:grid;place-items:center}
.col{display:flex;flex-direction:column}
.sb{background:none;border:0;display:flex;align-items:center;gap:6px;padding:5px 8px;cursor:pointer;color:var(--ribt);font-size:14px;border-radius:4px;text-align:left}
.sb:hover{background:#cfcfcf}.sb:disabled{opacity:.4}
.sb input{height:24px;width:190px;border:1px solid #999;padding:0 6px}
.main{flex:1;display:flex;min-height:0;margin-top:6px}
.rail{width:54px;display:flex;flex-direction:column;align-items:center;gap:22px;padding-top:12px;font-size:20px}
.rail span{cursor:pointer;opacity:.8}.rail .on{border-left:3px solid var(--acc);opacity:1}
.folders{width:400px;max-width:28vw;background:var(--bg2);overflow:auto;padding:6px 4px;font-size:15px}
.fh{padding:6px 8px;font-size:18px;display:flex;gap:6px;cursor:pointer}
.fi{padding:6px 8px 6px 30px;display:flex;justify-content:space-between;cursor:pointer;border-radius:3px}
.fi:hover{background:#444}.fi.on{background:#555;font-weight:600}
.fi .n{color:#ddd;font-size:13px}
.fav .fi{padding-left:28px}
.sep{height:1px;background:#555;margin:8px 0}
.listp{width:440px;max-width:36vw;background:#555;display:flex;flex-direction:column;min-width:300px}
.lh{display:flex;gap:16px;padding:10px 14px;align-items:center;font-size:16px}
.lh .t{cursor:pointer;color:#ccc;padding-bottom:4px;border-bottom:2px solid transparent}
.lh .t.on{color:#fff;border-color:var(--acc)}
.lh .r{margin-left:auto;display:flex;gap:10px;align-items:center;font-size:14px;cursor:pointer}
.items{flex:1;overflow:auto;background:var(--list);color:#222}
.banner{background:#3c3c3c;color:#fff;padding:10px 14px;margin:0 0 6px}
.banner b{display:block}
.gh{background:#3f3f3f;color:#fff;font-weight:600;font-size:13px;padding:6px 14px}
.mail{padding:10px 16px;border-bottom:1px solid #c4c4c4;cursor:pointer;position:relative}
.mail:hover{background:#cbd9e6}.mail.sel{background:var(--sel)}
.mail .f{font-size:17px;display:flex;justify-content:space-between}
.mail .s{font-size:14px;margin-top:2px;display:flex;justify-content:space-between;gap:8px}
.mail .p{font-size:14px;color:#555;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mail.unread .f,.mail.unread .s span:first-child{font-weight:700}
.mail.unread:before{content:"";position:absolute;left:5px;top:50%;width:4px;height:60%;transform:translateY(-50%);background:#0f6cbd;border-radius:2px}
.mail .d{font-size:14px;color:#444;white-space:nowrap}
.empty{padding:40px;text-align:center;color:#555}
.read{flex:1;background:#646464;display:flex;flex-direction:column;min-width:0}
.ph{margin:auto;text-align:center}
.ph .env{font-size:56px}.ph h2{font-weight:400;margin:10px 0}.ph a{color:#8fc1f5;cursor:pointer}
.rd{background:#fff;color:#222;flex:1;overflow:auto;padding:24px 30px}
.rd h2{font-weight:600;font-size:20px;margin-bottom:12px}
.rd .meta{display:flex;gap:12px;align-items:center;padding-bottom:12px;border-bottom:1px solid #ddd;margin-bottom:16px}
.rd .av{width:40px;height:40px;border-radius:50%;background:#0f6cbd;color:#fff;display:grid;place-items:center;font-weight:600}
.rd .att{display:inline-block;border:1px solid #bbb;border-radius:4px;padding:6px 10px;margin-top:16px;font-size:13px}
.rd pre{font:inherit;white-space:pre-wrap;line-height:1.5}
.status{height:26px;background:#2d2d2d;font-size:12px;display:flex;gap:20px;align-items:center;padding:0 14px;color:#ddd}
.status .r{margin-left:auto}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;place-items:center;z-index:9}
.modal.on{display:grid}
.cmp{width:min(720px,94vw);height:min(560px,90vh);background:#fff;color:#222;border-radius:8px;display:flex;flex-direction:column;box-shadow:0 10px 40px #000a}
.cmp header{display:flex;justify-content:space-between;padding:10px 16px;background:#0f6cbd;color:#fff;border-radius:8px 8px 0 0}
.cmp header span{cursor:pointer}
.cmp .row{display:flex;align-items:center;border-bottom:1px solid #ddd;padding:0 16px}
.cmp .row label{width:60px;color:#555}
.cmp .row input{flex:1;border:0;height:36px;font-size:14px;outline:0}
.cmp textarea{flex:1;border:0;padding:16px;font:inherit;outline:0;resize:none}
.cmp footer{padding:10px 16px;display:flex;gap:8px;border-top:1px solid #ddd}
.cmp footer button{padding:7px 20px;border-radius:4px;border:1px solid #999;background:#fff;cursor:pointer}
.cmp footer .pri{background:#0f6cbd;color:#fff;border-color:#0f6cbd}
.menu{position:fixed;background:#fff;color:#222;border:1px solid #bbb;border-radius:4px;box-shadow:0 4px 16px #0006;display:none;z-index:8;min-width:170px;padding:4px 0}
.menu div{padding:7px 14px;cursor:pointer}.menu div:hover{background:#e6e6e6}
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%);background:#222;color:#fff;padding:9px 18px;border-radius:6px;opacity:0;transition:.3s;pointer-events:none;z-index:20}
.toast.on{opacity:1}
.mid{flex:1;display:flex;min-width:0;min-height:0}
.mid[data-pane=bottom]{flex-direction:column}
.mid[data-pane=bottom] .listp{width:auto;max-width:none;height:46%;min-width:0}
.mid[data-pane=bottom] .read{min-height:0}
body[data-density=compact] .mail{padding:5px 14px}
body[data-density=compact] .mail .p{display:none}
body.nopreview .mail .p{display:none}
.setov{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;place-items:center;z-index:10}
.setov.on{display:grid}
.setd{width:min(900px,95vw);height:min(600px,90vh);background:#fff;color:#222;border-radius:8px;display:flex;flex-direction:column;box-shadow:0 10px 40px #000a}
.setd header{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;border-bottom:1px solid #ddd;font-size:18px}
.setd header span{cursor:pointer;font-size:16px;padding:4px 8px}
.setb{flex:1;display:flex;min-height:0}
.setn{width:230px;background:#f3f3f3;padding:8px;overflow:auto}
.setn div{padding:9px 12px;border-radius:4px;cursor:pointer}
.setn div:hover{background:#e6e6e6}.setn div.on{background:#dbe8f6;font-weight:600}
.setc{flex:1;padding:20px 26px;overflow:auto}
.setc h3{font-size:16px;margin-bottom:8px}.setc h3.m{margin-top:20px}
.rd2{display:flex;gap:8px;align-items:center;padding:5px 0;cursor:pointer}
.setc input[type=text],.setc select,.setc textarea{width:100%;border:1px solid #999;border-radius:4px;padding:6px 8px;font:inherit}
.fr{display:grid;grid-template-columns:150px 1fr;gap:8px;align-items:center;margin:6px 0}
.hint{color:#666;font-size:12px;margin-top:8px}
.sbtn{margin-top:14px;padding:7px 18px;border:1px solid #0f6cbd;background:#0f6cbd;color:#fff;border-radius:4px;cursor:pointer}
body[data-theme=light]{--bg:#f3f3f3;--bg2:#f7f7f7;--txt:#222}
body[data-theme=light] .top,body[data-theme=light] .tabs{background:#e8e8e8}
body[data-theme=light] .tabs button,body[data-theme=light] .lh{color:#222}
body[data-theme=light] .listp{background:#eee}
body[data-theme=light] .lh .t{color:#555}
body[data-theme=light] .lh .t.on{color:#000}
body[data-theme=light] .read{background:#e5e5e5}
body[data-theme=light] .fi:hover{background:#e6e6e6}
body[data-theme=light] .fi.on{background:#dbe8f6}
body[data-theme=light] .fi .n{color:#444}
body[data-theme=light] .sep{background:#ccc}
body[data-theme=light] .status{background:#e0e0e0;color:#333}
body[data-theme=light] .search input{background:#fff}
body[data-theme=light] .wb:hover{background:#d5d5d5}
body[data-theme=light] .gh{background:#d0d0d0;color:#222}
body[data-theme=light] .banner{background:#ddd;color:#222}
@media(max-width:900px){.folders{display:none}.listp{max-width:none;width:45%}}

.ribbon[hidden]{display:none}
.rb.on{background:#bcd3ea}
.pb{display:inline-block;width:120px;height:10px;background:#555;vertical-align:middle;border-radius:2px;overflow:hidden;margin-left:6px}
.pb b{display:block;height:100%;width:0;background:#fff}
.mail .qa{display:none;position:absolute;right:16px;top:8px;gap:10px;font-size:16px}
.mail .qa b{font-weight:400;cursor:pointer;padding:0 3px}.mail .qa b:hover{background:#b5c8da;border-radius:3px}
.mail:hover .qa{display:flex}.mail:hover .ico{visibility:hidden}