:root{
  --bg:#0f1115; --panel:#141821; --card:#171a21; --line:#262b36; --txt:#e6e9ef; --mut:#9aa4b2;
  --accent:#2563eb; --accent2:#3b82f6; --green:#22c55e; --amber:#f59e0b; --red:#ef4444;
  --brand:#0b3b8c; --brand2:#12245a; --accent-soft:rgba(59,130,246,.16);
}
@media(prefers-color-scheme:light){
  :root{--bg:#eef1f5;--panel:#ffffff;--card:#ffffff;--line:#e4e7ec;--txt:#1a1f2b;--mut:#5b6472}
}
/* manual overrides (win over the media query) */
html[data-mode="dark"]{--bg:#000000;--panel:#0d0d11;--card:#15151b;--line:#26262f;--txt:#e6e9ef;--mut:#9aa4b2}
html[data-mode="light"]{--bg:#eef1f5;--panel:#ffffff;--card:#ffffff;--line:#e4e7ec;--txt:#1a1f2b;--mut:#5b6472}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--txt);font:14px/1.5 'Segoe UI',system-ui,Arial,sans-serif}
.hidden{display:none!important}.mut{color:var(--mut)}.err{color:var(--red);font-size:13px;min-height:18px}
.btn{background:var(--card);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:8px 13px;cursor:pointer;font-size:13px}
.btn:hover{border-color:var(--accent2)}.btn.sm{padding:6px 10px;font-size:12px}.btn.block{width:100%;margin-bottom:12px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
.btn.primary:hover{background:var(--accent2)}
.btn.green{border-color:var(--green);color:var(--green)}.btn.ghost{background:transparent}

/* sign in */
.signin{height:100%;display:flex;align-items:center;justify-content:center}
.signin .card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:36px;max-width:400px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.25)}
.signin-logo{width:72px;height:auto;border-radius:12px;margin-bottom:8px}
.signin h1{margin:6px 0 4px}

/* app shell */
.app{height:100%;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:16px;padding:10px 16px;background:linear-gradient(90deg,var(--brand),var(--brand2));color:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:210px}
.logo-tile{background:#fff;border-radius:9px;padding:4px;display:flex}.logo-tile img{width:30px;height:auto;display:block}
.wordmark{font-size:18px;letter-spacing:.3px}.wordmark b{font-weight:800}
.search{flex:1;display:flex;justify-content:center}
.search{gap:8px;align-items:center}
.search input{width:min(520px,100%);background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:10px;padding:9px 14px;font-size:14px}
.search input::placeholder{color:rgba(255,255,255,.7)}
.search select{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:10px;padding:9px 10px;font-size:13px}
.search select option{color:#111}
.search .btn{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.25);color:#fff}
.search .btn:hover{background:rgba(255,255,255,.28)}
.acctbar{display:flex;gap:8px;align-items:center}
.acctbar .btn{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25);color:#fff}
.acctbar .btn:hover{background:rgba(255,255,255,.22)}
.acctbar select{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:8px;padding:6px 8px;font-size:12px;max-width:190px}
.acctbar select option{color:#111}

/* 3-column layout */
.layout{flex:1;display:flex;min-height:0}
.sidebar{width:210px;border-right:1px solid var(--line);padding:14px;overflow:auto;background:var(--panel)}
.folders{display:flex;flex-direction:column;gap:2px}
.navitem{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;background:transparent;border:0;color:var(--txt);padding:8px 10px;border-radius:8px;cursor:pointer;font-size:13px}
.navitem:hover{background:rgba(127,127,127,.10)}.navitem.sel{background:var(--accent-soft);color:var(--accent2);font-weight:600}
.navitem .count{color:var(--mut);font-size:12px}.navitem.sel .count{color:var(--accent2)}
.navsep{height:1px;background:var(--line);margin:12px 0}

.listcol{width:400px;max-width:42%;border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.listhead{padding:10px 16px;font-weight:700;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}
.jumpdate{font-weight:400;background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:6px;padding:3px 6px;font-size:12px}
.list{flex:1;overflow:auto}
.item{padding:12px 16px;border-bottom:1px solid var(--line);cursor:pointer;display:flex;gap:10px;align-items:flex-start}
.item .selbox{margin-top:4px;flex:none;cursor:pointer}
.item .ibody{flex:1;min-width:0}
.selbar{padding:8px 16px;border-bottom:1px solid var(--line);display:flex;gap:10px;align-items:center;font-size:13px}
.selbar.hidden{display:none}
.item:hover{background:rgba(127,127,127,.06)}.item.sel{background:var(--accent-soft)}
.item .top{display:flex;justify-content:space-between;gap:8px}
.item .from{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item.unread .from::before{content:"\2022";color:var(--accent2);margin-right:6px}
.item .when{color:var(--mut);font-size:12px;white-space:nowrap}
.item .subj{margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .prev{color:var(--mut);font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .chips{margin-top:5px;display:flex;gap:5px;flex-wrap:wrap}
.chip{font-size:11px;border-radius:6px;padding:1px 7px}
.chip.client{background:rgba(245,158,11,.16);color:var(--amber)}
.chip.editable{cursor:pointer;border:1px dashed transparent}.chip.editable:hover{border-color:var(--amber)}
.chip.task{background:rgba(34,197,94,.16);color:var(--green)}
.chip.who{background:rgba(59,130,246,.16);color:var(--accent2)}

.readercol{flex:1;overflow:auto;padding:22px 26px;min-width:0}
.empty{color:var(--mut);padding:50px;text-align:center}
.spinner{color:var(--mut);padding:18px}
.rhead h2{margin:0 0 4px}
.rhead .meta{color:var(--mut);font-size:13px}
.ractions{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0}
.msgbody{padding-top:6px}.msgbody img{max-width:100%;height:auto}
.attos{margin:12px 0;display:flex;gap:8px;flex-wrap:wrap}
.atto{border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:12px;cursor:pointer}
.atto:hover{border-color:var(--accent2)}

/* modals */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;width:min(680px,100%);max-height:90vh;overflow:auto;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.modal-card h3{margin:0 0 14px}
.field{margin-bottom:12px}.field label{display:block;font-size:12px;color:var(--mut);margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:9px 11px;font:inherit}
.field textarea{min-height:160px;resize:vertical}
.modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:8px}
.row2{display:flex;gap:10px}.row2>*{flex:1}

.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--card);border:1px solid var(--line);border-radius:10px;padding:11px 18px;box-shadow:0 8px 30px rgba(0,0,0,.35);opacity:0;transition:opacity .2s;z-index:200}
.toast.show{opacity:1}

/* calendar */
.cal-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.cal-nav,.cal-views{display:flex;gap:6px}
.cal-title{font-size:18px;font-weight:700}
.btn.on{background:var(--accent);border-color:var(--accent);color:#fff}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.cal-dow{background:var(--panel);color:var(--mut);font-size:11px;text-transform:uppercase;letter-spacing:.04em;padding:6px 8px;text-align:center}
.cal-cell{background:var(--card);min-height:98px;padding:6px;cursor:pointer;overflow:hidden}
.cal-grid.week .cal-cell{min-height:440px}
.cal-cell:hover{background:rgba(127,127,127,.05)}
.cal-cell.dim{opacity:.42}
.cal-cell.today{outline:2px solid var(--accent);outline-offset:-2px}
.cal-daynum{font-size:12px;color:var(--mut);margin-bottom:4px}
.cal-ev{background:var(--accent-soft);color:var(--accent2);border-radius:6px;padding:2px 6px;font-size:12px;margin-bottom:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer}
.cal-views select{background:var(--card);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:6px 8px;font-size:13px}
.cal-ev.has-join{background:rgba(34,197,94,.16);color:var(--green)}
.cal-ev .t{opacity:.75;font-variant-numeric:tabular-nums;margin-right:3px}
.cal-grid.day{grid-template-columns:1fr}
.cal-grid.day .cal-cell,.cal-grid.week .cal-cell{min-height:520px}
.agenda{display:flex;flex-direction:column}
.ag-day{display:flex;gap:14px;padding:10px 4px;border-bottom:1px solid var(--line)}
.ag-date{min-width:130px;color:var(--mut);font-weight:600}
.ag-evs{flex:1}

/* composer + address-book autocomplete */
.acbox{position:fixed;background:var(--card);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,.35);z-index:300;max-height:230px;overflow:auto}
.acitem{padding:8px 11px;cursor:pointer;font-size:13px}
.acitem:hover{background:rgba(59,130,246,.15)}
#cBody{min-height:150px}
.quote{border:1px solid var(--line);border-radius:8px;padding:10px;max-height:300px;overflow:auto;background:var(--panel)}
.quote img{max-width:100%;height:auto}
.modal-card{width:min(760px,100%)}
.sigprev{border:1px dashed var(--line);border-radius:8px;padding:8px;margin-top:6px;color:var(--mut);font-size:13px;max-height:120px;overflow:auto}
.sigprev img{max-height:48px}
.dashtable{width:100%;border-collapse:collapse;font-size:13px}
.dashtable th{position:sticky;top:0;background:var(--bg);text-align:left;color:var(--mut);font-size:11px;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:1px solid var(--line)}
.dashtable td{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.dashtable tbody tr{cursor:pointer}
.dashtable tbody tr:hover td{background:rgba(127,127,127,.06)}
.dashtable td.dsubj{font-weight:600;max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dash-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.dash-toolbar select{background:var(--card);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:6px 10px}
.dashgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.dashcard{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column;min-height:130px}
.dashcard-h{display:flex;justify-content:space-between;align-items:center;font-weight:700;margin-bottom:8px}
.dashcard-body{display:flex;flex-direction:column;gap:8px;max-height:280px;overflow:auto}
.dtask{border:1px solid var(--line);border-radius:8px;padding:8px}
.dtask-name{font-weight:600;font-size:13px;cursor:pointer}
.dtask-name:hover{color:var(--accent2)}
.dtask-row{display:flex;gap:6px;margin-top:6px;align-items:center}
.dtask-row select{flex:1;background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:6px;padding:4px 6px;font-size:12px}
.dtask-row .ddue{background:var(--panel);border:1px solid var(--line);color:var(--txt);border-radius:6px;padding:3px 5px;font-size:12px}
.dtask.over{border-color:var(--red)}
.dtask.over .dtask-name::after{content:" • overdue";color:var(--red);font-size:11px;font-weight:600}
.cal-ev.duetask{background:rgba(245,158,11,.18);color:var(--amber)}