:root{
  --bg:#f4f6fb; --panel:#ffffff; --line:#e5e9f2; --ink:#1f2733; --muted:#6b7686;
  --brand:#1f7a5a; --brand2:#e8f5ef; --accent:#2563eb;
  --new:#6366f1; --received:#0891b2; --analysis:#d97706; --dev:#7c3aed; --done:#16a34a; --rejected:#dc2626;
  --radius:12px; --shadow:0 1px 3px rgba(20,30,50,.06),0 6px 20px rgba(20,30,50,.05);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:system-ui,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}
.hidden{display:none!important}
.muted{color:var(--muted)}
.tiny{font-size:12px}
.err{color:var(--rejected);margin-top:8px;font-size:13px;min-height:16px}
a{color:var(--accent);text-decoration:none}
button{font:inherit;cursor:pointer;border:none;border-radius:8px;padding:9px 14px;background:var(--brand);color:#fff;font-weight:600}
button.ghost{background:#eef1f7;color:var(--ink)}
button.line{background:#fff;border:1px solid var(--line);color:var(--ink)}
button.danger{background:var(--rejected);color:#fff}
.dangerzone{margin-top:14px;border-top:1px dashed #f0c9c9;padding-top:12px}
button.sm{padding:6px 10px;font-size:13px}
button:disabled{opacity:.55;cursor:default}
input,textarea,select{font:inherit;width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
textarea{resize:vertical;min-height:90px}
label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin:12px 0 5px}

/* boot + login */
.boot{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted)}
#login{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef4f1,#e7edf7)}
.login-card{background:#fff;padding:30px;border-radius:16px;box-shadow:var(--shadow);width:360px;max-width:92vw}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:18px}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff}
.login-card button{width:100%;margin-top:16px}

/* app layout */
#app{display:grid;grid-template-columns:230px 1fr 320px;grid-template-rows:100vh;height:100vh}
#app.list-mode{grid-template-columns:230px 1fr}
#app.list-mode .tl{display:none}
.side{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:16px 12px}
.side .brand{font-size:15px;padding:4px 6px 14px}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:8px;color:var(--ink);cursor:pointer;font-weight:500}
.nav a:hover{background:#f1f4fa}
.nav a.active{background:var(--brand2);color:var(--brand);font-weight:700}
.nav .badge{margin-left:auto;background:#eef1f7;border-radius:20px;padding:1px 8px;font-size:12px;color:var(--muted)}
.side .newbtn{width:100%;margin-bottom:14px}
.side .spacer{flex:1}
.usercard{border-top:1px solid var(--line);padding-top:12px;margin-top:8px}
.usercard .nm{font-weight:700}
.usercard .rl{font-size:12px;color:var(--brand);font-weight:600}
.mini{margin-top:14px;font-size:12px;color:var(--muted)}
.mini .row{display:flex;justify-content:space-between;padding:3px 6px}

/* main */
.main{overflow-y:auto;padding:22px 26px}
.head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.head h1{font-size:19px;margin:0}
.spacer{flex:1}

.list{display:flex;flex-direction:column;gap:10px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;cursor:pointer;box-shadow:var(--shadow)}
.card:hover{border-color:#cdd6e8}
.card .r1{display:flex;align-items:center;gap:10px}
.card .code{font-family:ui-monospace,monospace;font-size:12px;color:var(--muted)}
.card .ttl{font-weight:700;flex:1}
.card .meta{display:flex;gap:14px;color:var(--muted);font-size:12.5px;margin-top:7px;flex-wrap:wrap}

.chip{font-size:12px;font-weight:700;padding:3px 10px;border-radius:20px;color:#fff;white-space:nowrap}
.st-new{background:var(--new)} .st-received{background:var(--received)} .st-analysis{background:var(--analysis)}
.st-dev{background:var(--dev)} .st-done{background:var(--done)} .st-rejected{background:var(--rejected)}
.pri{font-size:12px;font-weight:600}
.pri-urgent{color:#dc2626}.pri-high{color:#d97706}.pri-normal{color:var(--muted)}.pri-low{color:#94a3b8}

/* detail */
.detail .box{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:14px;box-shadow:var(--shadow)}
.reqinfo{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px 18px}
.reqinfo div span{display:block;font-size:12px;color:var(--muted)}
.reqinfo div b{font-weight:600}
.content{white-space:pre-wrap;line-height:1.6}
.atts{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.att{display:flex;align-items:center;gap:7px;background:#f5f7fb;border:1px solid var(--line);border-radius:8px;padding:6px 10px;font-size:13px}
.thread{display:flex;flex-direction:column;gap:12px}
.msg{border:1px solid var(--line);border-radius:10px;padding:11px 13px;background:#fff}
.msg.staff{background:#fffdf3;border-color:#f0e6c8}
.msg.resp{background:var(--brand2);border-color:#cfe9dd}
.msg .mh{display:flex;gap:8px;align-items:center;font-size:12.5px;margin-bottom:5px}
.msg .mh b{font-weight:700}
.msg .tag{font-size:11px;padding:1px 7px;border-radius:12px;background:#eef1f7;color:var(--muted)}
.actionbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.replybar{display:flex;flex-direction:column;gap:8px}
.filerow{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}

/* timeline */
.tl{background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;padding:20px 18px}
.tl h3{margin:0 0 16px;font-size:14px}
.steps{position:relative;padding-left:6px}
.step{position:relative;padding:0 0 22px 26px;border-left:2px solid var(--line);margin-left:6px}
.step:last-child{border-left-color:transparent}
.step .dot{position:absolute;left:-9px;top:0;width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid var(--line)}
.step.done .dot{background:var(--done);border-color:var(--done)}
.step.cur .dot{background:var(--accent);border-color:var(--accent);box-shadow:0 0 0 4px #dbe6ff}
.step .lbl{font-weight:700;font-size:13px;margin-top:-2px}
.step.pending .lbl{color:var(--muted);font-weight:500}
.step .sub{font-size:12px;color:var(--muted);margin-top:2px}
.log{margin-top:8px;border-top:1px dashed var(--line);padding-top:14px}
.log .li{font-size:12.5px;margin-bottom:12px}
.log .li .t{color:var(--muted)}
.log .li .a{font-weight:600}

.empty{text-align:center;color:var(--muted);padding:60px 20px}
table.users{width:100%;border-collapse:collapse}
table.users th,table.users td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);font-size:13px}
table.users th{color:var(--muted);font-weight:600;font-size:12px}
select.rolesel{width:auto;padding:5px 8px}

.modal-bg{position:fixed;inset:0;background:rgba(20,28,44,.45);display:flex;align-items:flex-start;justify-content:center;padding:5vh 16px;z-index:50;overflow:auto}
.modal{background:#fff;border-radius:14px;width:560px;max-width:96vw;padding:22px 24px;box-shadow:var(--shadow)}
.modal h2{margin:0 0 4px;font-size:17px}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:#1f2733;color:#fff;padding:11px 18px;border-radius:10px;z-index:80;box-shadow:var(--shadow)}

/* chuông thông báo */
.bellbtn{position:relative;background:transparent;padding:2px 4px;font-size:18px;line-height:1}
.bell-badge{position:absolute;top:-6px;right:-6px;background:var(--rejected);color:#fff;font-size:11px;font-weight:700;min-width:17px;height:17px;border-radius:10px;display:grid;place-items:center;padding:0 4px}
.bell-drop{position:absolute;left:12px;right:12px;top:56px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);z-index:70;overflow:hidden}
.bd-h{display:flex;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line);font-size:13px}
.bd-h a{cursor:pointer;font-size:12px}
.bd-list{max-height:60vh;overflow:auto}
.bd-item{padding:9px 12px;border-bottom:1px solid var(--line);cursor:pointer}
.bd-item:hover{background:#f5f7fb}
.bd-item.unread{background:#f0f7ff}
.bd-empty{padding:22px 12px;text-align:center;color:var(--muted);font-size:13px}

/* toast thông báo góc phải */
.ntoasts{position:fixed;top:18px;right:18px;z-index:90;display:flex;flex-direction:column;gap:12px;max-width:400px}
.ntoast{display:flex;gap:11px;background:#fff;border:1px solid var(--line);border-left:6px solid var(--accent);border-radius:12px;box-shadow:0 8px 30px rgba(20,30,50,.18);padding:15px 17px;min-width:330px;cursor:pointer;opacity:0;transform:translateX(40px);transition:.3s}
.ntoast.show{opacity:1;transform:none}
.ntoast.ok{border-left-color:var(--done)}
.ntoast.info{border-left-color:var(--accent)}
.ntoast .nt-ic{font-size:24px;line-height:1.1}
.ntoast .nt-body{flex:1;min-width:0}
.ntoast .nt-h{display:flex;justify-content:space-between;align-items:center;gap:8px}
.ntoast .nt-h b{font-size:15px}
.ntoast .nt-code{font-family:ui-monospace,monospace;font-size:11px;color:var(--muted)}
.ntoast .nt-b{font-size:13.5px;margin:4px 0;color:var(--ink);line-height:1.45}
.ntoast .nt-f{font-size:12px;color:var(--muted)}

/* nút bật thông báo màn hình */
.notif-enable{display:block;text-align:center;cursor:pointer;background:#fff4d6;border:1px solid #f0d98a;color:#8a6d1a;border-radius:8px;padding:8px 10px;font-size:12.5px;font-weight:600;margin-bottom:10px}
.notif-enable:hover{background:#ffeebf}

/* thanh tìm kiếm */
.searchbox{max-width:340px;padding:8px 12px;border-radius:20px;border:1px solid var(--line)}
.listhint{color:var(--muted);font-size:12.5px;margin:-6px 0 14px}

/* nhãn công khai */
.tag.pub{background:#e8f5ef;color:var(--brand);font-weight:700}

/* vùng kéo-thả đính kèm */
.dropzone{border:2px dashed #9fd3bf;border-radius:12px;padding:18px 14px;background:linear-gradient(180deg,#f3fbf7,#f7fafc);cursor:pointer;transition:.15s}
.dropzone:hover{border-color:var(--brand);background:#eefaf4}
.dropzone.over{border-color:var(--brand);background:#e3f5ec;box-shadow:inset 0 0 0 3px #cdeede}
.dz-ico{font-size:28px;text-align:center;line-height:1}
.dz-main{text-align:center;font-weight:800;color:var(--brand);font-size:14.5px;margin-top:5px}
.dz-sub{text-align:center;color:var(--muted);font-size:12.5px;margin-top:3px}
.att-list{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}
.att-list:empty{margin-top:0}
.att-chip{display:inline-flex;align-items:center;gap:4px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:4px 10px;font-size:12.5px}
.att-chip .x{cursor:pointer;color:var(--rejected);margin-left:2px;font-weight:700}

/* dấu tích công khai */
.pubtoggle{display:flex;align-items:center;gap:8px;margin:0 0 12px;padding:9px 11px;background:#f5f9ff;border:1px solid #dbe6ff;border-radius:8px;font-weight:600;flex-wrap:wrap}
.pubtoggle .tiny{font-weight:400;flex-basis:100%}

/* thêm thành viên */
.addmember .amrow{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-start}
.addmember .amrow select{width:auto}
/* combobox chọn nhân sự (Select2-style) */
.pp{position:relative;flex:1;min-width:260px}
.pp>input{width:100%}
.pp-drop{position:absolute;left:0;right:0;top:calc(100% + 4px);background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);z-index:60;max-height:320px;overflow:auto}
.pp-item{padding:8px 11px;cursor:pointer;border-bottom:1px solid var(--line)}
.pp-item:last-child{border-bottom:none}
.pp-item:hover{background:var(--brand2)}
.pp-empty{padding:14px 12px;color:var(--muted);font-size:13px;text-align:center}

@media(max-width:900px){
  #app{grid-template-columns:1fr;grid-template-rows:auto 1fr auto;height:auto;min-height:100vh}
  .side{flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px;height:auto}
  .side .brand,.side .spacer,.mini,.usercard{width:100%}
  .nav{flex-direction:row;flex-wrap:wrap}
  .tl{border-left:none;border-top:1px solid var(--line)}
}