:root{--bg:#f4f6f9;--card:#fff;--line:#e2e6ec;--text:#1c2333;--muted:#667085;--brand:#1f3a5f;--accent:#2563eb;
--hoch:#c62828;--mittel:#2563eb;--niedrig:#667085;--werbung:#b26a00;--spam:#6b21a8;--ok:#15803d}
@media (prefers-color-scheme:dark){:root{--bg:#12161d;--card:#1b212b;--line:#2c3440;--text:#e8ebf0;--muted:#98a2b3;--brand:#9dbbe0;--accent:#6ea0f7;
--hoch:#ef6b6b;--mittel:#6ea0f7;--niedrig:#98a2b3;--werbung:#e0a040;--spam:#b98cf0;--ok:#4ade80}}
*{box-sizing:border-box}html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--text);font:15px/1.45 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
#app{height:100%}
button,input,select,textarea{font:inherit;color:inherit}
input,select,textarea{width:100%;padding:10px 12px;background:var(--card);border:1px solid var(--line);border-radius:8px;font-size:16px}
textarea{min-height:220px;resize:vertical}
input[type=checkbox]{width:auto;flex:none;margin:0}
label.row{flex-wrap:nowrap;font-weight:400}
.row>input,.row>select{flex:1 1 140px;width:auto;min-width:0}
label{display:block;margin:12px 0 4px;font-weight:600;font-size:14px}
button{cursor:pointer;border:1px solid var(--line);background:var(--card);border-radius:8px;padding:8px 14px}
button:hover{border-color:var(--accent)}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
button.danger{color:var(--hoch)}
button.link{border:0;background:none;color:var(--accent);padding:0;text-decoration:underline}
button:disabled{opacity:.55;cursor:default}
a{color:var(--accent)}h1{font-size:22px;margin:0 0 12px}h2{font-size:17px;margin:24px 0 8px}
.muted{color:var(--muted)}.small{font-size:13px}.error{color:var(--hoch);margin:10px 0}.okmsg{color:var(--ok);margin:10px 0}
.center{min-height:100%;display:flex;align-items:flex-start;justify-content:center;padding:32px 16px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;width:100%;max-width:520px}
.panel.wide{max-width:760px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.row.end{justify-content:flex-end}.spread{justify-content:space-between}
.mt{margin-top:16px}
.qr{display:block;width:220px;height:220px;margin:12px auto;background:#fff;border-radius:8px}
.code{font-family:ui-monospace,Menlo,monospace;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:10px;overflow-wrap:anywhere;user-select:all}
.info ul{padding-left:20px;margin:8px 0}.info li{margin:6px 0}
.note{background:var(--bg);border:1px solid var(--line);border-left:4px solid var(--werbung);border-radius:8px;padding:10px 12px;margin:12px 0}
.layout{display:grid;grid-template-columns:230px minmax(280px,420px) 1fr;height:100%}
.side{background:var(--card);border-right:1px solid var(--line);padding:14px;overflow:auto;padding-top:max(14px,env(safe-area-inset-top))}
.brand{font-weight:700;color:var(--brand);font-size:18px;margin-bottom:12px}
.side button.nav{display:flex;justify-content:space-between;width:100%;border:0;background:none;padding:8px 10px;text-align:left;border-radius:8px}
.side button.nav:hover{background:var(--bg)}.side button.nav.active{background:var(--bg);font-weight:700}
.side h3{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:16px 10px 4px}
.badge{color:var(--muted);font-size:13px}.badge.un{color:var(--accent);font-weight:700}
.compose-btn{width:100%;margin-bottom:12px}
.list{border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0;background:var(--bg)}
.listhead{padding:10px;border-bottom:1px solid var(--line);padding-top:max(10px,env(safe-area-inset-top))}
.items{overflow:auto;flex:1}
.item{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;background:var(--card);padding:10px 12px}
.item:hover{background:var(--bg)}.item.active{outline:2px solid var(--accent);outline-offset:-2px}
.item .who{display:flex;justify-content:space-between;gap:8px}.item .name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item.unread .name,.item.unread .subj{font-weight:700}
.item .subj,.item .snip{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.item .snip{color:var(--muted);font-size:13px}
.chips{display:flex;gap:4px;flex-wrap:wrap;margin-top:4px}
.chip{font-size:11px;border-radius:999px;padding:1px 8px;border:1px solid currentColor;white-space:nowrap}
.chip.hoch{color:var(--hoch)}.chip.mittel{color:var(--mittel)}.chip.niedrig{color:var(--niedrig)}.chip.werbung{color:var(--werbung)}.chip.spam{color:var(--spam)}.chip.plain{color:var(--muted)}
.detail{min-width:0;display:flex;flex-direction:column;overflow:auto;background:var(--card)}
.dhead{padding:14px 16px;border-bottom:1px solid var(--line);padding-top:max(14px,env(safe-area-inset-top))}
.dhead h1{overflow-wrap:anywhere;font-size:19px;margin:6px 0}
.warn{background:var(--bg);border-left:4px solid var(--hoch);padding:8px 12px;margin:8px 0;border-radius:6px}
.mailframe{flex:1;width:100%;min-height:420px;border:0;background:#fff}
.atts{padding:8px 16px;border-top:1px solid var(--line)}
.empty{padding:32px;color:var(--muted);text-align:center}
.banner{background:var(--bg);border-bottom:1px solid var(--line);padding:8px 10px;font-size:13px}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:flex-start;justify-content:center;padding:24px 12px;overflow:auto;z-index:10}
.modal .panel{max-width:680px}
.back{display:none}
table{width:100%;border-collapse:collapse}td,th{padding:8px 6px;border-bottom:1px solid var(--line);text-align:left;overflow-wrap:anywhere}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--brand);color:#fff;padding:10px 16px;border-radius:10px;z-index:20;max-width:90%}
@media (prefers-color-scheme:dark){.toast{color:#12161d}}
.menu-btn{display:none}
@media (max-width:860px){
.layout{grid-template-columns:1fr;grid-template-rows:1fr}
.side,.list,.detail{grid-column:1;grid-row:1;border-right:0}
.side,.detail{display:none}
.layout.show-side .side{display:block;z-index:2}.layout.show-side .list{display:none}
.layout.show-detail .detail{display:flex;z-index:2}.layout.show-detail .list{display:none}
.back,.menu-btn{display:inline-block}
}