:root{--primary:#f47721;--primary2:#ffb62e;--brown:#56301b;--text:#172033;--muted:#667085;--bg:#fffdf9;--soft:#f7f8fa;--border:#eaecf0;--white:#fff;--success:#12b76a;--warning:#f79009;--danger:#f04438;--info:#2e90fa;--radius:20px;--shadow:0 12px 35px rgba(25,33,52,.06)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:14px/1.45 Inter,Arial,"Helvetica Neue",sans-serif;color:var(--text);background:var(--bg)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}button{cursor:pointer}h1,h2,h3,h4,p{margin:0 0 12px}h1{font-size:28px}h2{font-size:21px}h3{font-size:17px}.muted{color:var(--muted)}.small{font-size:12px}.text-danger{color:var(--danger)}.text-success{color:var(--success)}
.btn{border:0;border-radius:12px;padding:12px 18px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;transition:.18s}.btn-primary{background:linear-gradient(100deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 10px 22px rgba(244,119,33,.2)}.btn-outline{background:#fff;border:1px solid var(--border);color:var(--text)}.btn-danger{background:#fee4e2;color:#b42318}.btn-sm{padding:8px 12px;min-height:36px;font-size:13px}.w-full{width:100%}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:14px}.field label{font-weight:600;font-size:13px}.input,.field input,.field select,.field textarea{border:1px solid var(--border);border-radius:12px;background:#fff;padding:12px 13px;outline:none;width:100%;min-height:45px}.field textarea{min-height:110px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(244,119,33,.1)}.grid-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}.span-2{grid-column:span 2}
.card{background:#fff;border:1px solid #eef0f4;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.card-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:17px}.card-head h2,.card-head h3{margin:0}.stack{display:flex;flex-direction:column;gap:14px}.grid{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid-6{grid-template-columns:repeat(6,minmax(0,1fr))}
.badge{padding:5px 10px;border-radius:50px;font-size:11px;font-weight:700;display:inline-flex;align-items:center;white-space:nowrap}.badge-success{background:#ecfdf3;color:#027a48}.badge-warning{background:#fffaeb;color:#b54708}.badge-danger{background:#fef3f2;color:#b42318}.badge-info{background:#eff8ff;color:#175cd3}.badge-muted{background:#f2f4f7;color:#475467}
.alert{margin:0 0 16px;padding:12px 14px;border-radius:12px;font-weight:600}.alert-success{background:#ecfdf3;color:#027a48}.alert-danger{background:#fef3f2;color:#b42318}.alert-warning{background:#fffaeb;color:#b54708}.alert-info{background:#eff8ff;color:#175cd3}
.progress{height:8px;background:#f1f3f5;border-radius:50px;overflow:hidden}.progress span{height:100%;display:block;border-radius:50px;background:linear-gradient(90deg,var(--primary),var(--primary2))}
/* Login */
.login-page{min-height:100vh;display:grid;grid-template-columns:1fr 1.03fr;background:var(--bg)}.login-visual{background:linear-gradient(145deg,#fff7ec,#fffdf9);display:flex;align-items:center;justify-content:center;padding:42px;position:relative;overflow:hidden}.login-visual:after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(255,182,46,.14),transparent 65%);z-index:0}.login-visual-inner{z-index:1;max-width:540px}.login-logo{max-height:310px;width:auto;margin:0 auto 28px}.login-visual h1{text-align:center;color:var(--brown);font-size:34px}.login-visual p{text-align:center;color:var(--muted);font-size:16px}.login-box-wrap{display:flex;align-items:center;justify-content:center;padding:32px}.login-box{max-width:410px;width:100%}.login-box .logo-mobile{display:none;width:118px;margin:0 auto 14px}.login-box h2{font-size:28px;margin-bottom:8px}.login-box .subtitle{color:var(--muted);margin-bottom:28px}.login-demo{background:#fff6eb;border:1px dashed #ffd19a;padding:13px;border-radius:12px;margin-top:17px;font-size:12px;color:#7a4318}
/* Employee app */
.app-body{background:#f8f9fb}.mobile-header{height:64px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:8px 16px;position:sticky;top:0;z-index:30}.mini-brand img{width:45px;height:45px;object-fit:contain}.mobile-header span{font-weight:800;letter-spacing:.06em;color:var(--brown)}.bell{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:#fff7ed}.employee-content{max-width:760px;margin:0 auto;padding:18px 16px 96px}.welcome{background:linear-gradient(120deg,#fff,#fff5e8);border:1px solid #ffe1c2;padding:20px;border-radius:24px;display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.score-circle{width:84px;height:84px;border-radius:50%;background:conic-gradient(var(--primary) var(--score,86%),#f1f3f5 0);display:grid;place-items:center;flex:none}.score-circle:after{content:"";width:66px;height:66px;background:white;border-radius:50%;grid-area:1/1}.score-circle strong{position:relative;z-index:1;grid-area:1/1;font-size:17px;color:var(--brown)}.section-title{display:flex;justify-content:space-between;align-items:center;margin:23px 0 12px}.section-title h2{font-size:18px;margin:0}.task-card,.course-card{display:flex;gap:12px;background:#fff;border:1px solid #eef0f3;border-radius:17px;padding:14px;align-items:center}.task-icon{width:44px;height:44px;background:#fff4e6;border-radius:13px;display:grid;place-items:center;font-size:21px;color:var(--primary);flex:none}.task-main{flex:1;min-width:0}.task-main h3{font-size:14px;margin:4px 0}.task-main p{font-size:12px;color:var(--muted);margin:0}.tabs{display:flex;gap:8px;overflow:auto;padding:2px 0 14px}.tabs a{white-space:nowrap;border-radius:50px;padding:9px 13px;background:#fff;border:1px solid var(--border);font-weight:600;color:var(--muted)}.tabs a.active{background:var(--primary);color:#fff;border-color:var(--primary)}.course-thumb{width:65px;height:65px;border-radius:13px;object-fit:cover;background:#fff5e9}.course-meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin:5px 0 9px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);display:flex;justify-content:center;z-index:50;padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{width:min(20%,150px);height:68px;display:flex;flex-direction:column;gap:4px;justify-content:center;align-items:center;color:var(--muted);font-size:11px}.bottom-nav a b{font-size:22px;line-height:20px;font-weight:500}.bottom-nav a.active{color:var(--primary);font-weight:700}.lesson-cover{width:100%;height:220px;object-fit:cover;border-radius:16px;margin-bottom:18px}.lesson-body{font-size:15px;line-height:1.7}.lesson-body img{max-width:100%;border-radius:12px}.media-frame{width:100%;aspect-ratio:16/9;border-radius:15px;background:#111;overflow:hidden;margin-bottom:16px}.media-frame video{width:100%;height:100%}.confirm-box{background:#fff8ef;border:1px solid #ffdfb7;border-radius:16px;padding:16px;margin-top:18px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.timer{font-weight:800;color:var(--danger);background:#fff1f0;padding:9px 13px;border-radius:11px}.question-box{padding:18px;border:1px solid var(--border);border-radius:16px;margin-bottom:14px}.question-box h3{line-height:1.55}.option{display:flex;gap:10px;border:1px solid var(--border);border-radius:12px;padding:12px;margin-top:9px}.option:has(input:checked){border-color:var(--primary);background:#fff8ef}.result-hero{text-align:center;padding:24px}.big-score{font-size:54px;color:var(--brown);font-weight:800}.bars .bar-row{margin:13px 0}.bar-row .label{display:flex;justify-content:space-between;font-weight:600;margin-bottom:6px}
/* Admin */
.admin-body{background:var(--soft)}.admin-shell{display:flex;min-height:100vh}.sidebar{width:254px;background:#fff;border-right:1px solid var(--border);position:fixed;left:0;top:0;bottom:0;padding:16px 12px;display:flex;flex-direction:column;z-index:60}.admin-brand{padding:4px 11px 17px;border-bottom:1px solid var(--border);margin-bottom:13px}.admin-brand img{height:71px;width:auto;margin:auto}.admin-brand span{display:block;text-align:center;text-transform:uppercase;color:var(--muted);font-size:11px;font-weight:700;letter-spacing:.09em;margin-top:5px}.sidebar-nav{display:flex;flex-direction:column;gap:5px}.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;color:#475467;font-weight:600}.sidebar-nav b{width:21px;color:var(--primary);font-size:18px;text-align:center}.sidebar-nav a.active,.sidebar-nav a:hover{background:#fff5e9;color:var(--primary)}.switch-link{margin-top:auto;padding:12px;border:1px solid #ffd4ac;border-radius:12px;text-align:center;color:var(--primary);font-weight:700}.admin-main{margin-left:254px;flex:1;min-width:0}.admin-header{height:68px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:9px 25px;position:sticky;top:0;z-index:20}.admin-header small{display:block;color:var(--muted)}.header-actions{display:flex;gap:9px;align-items:center}.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(100deg,var(--primary),var(--primary2));color:#fff;font-weight:bold;display:grid;place-items:center}.page-content{display:block!important;visibility:visible!important;opacity:1!important;padding:23px;max-width:1500px;min-height:calc(100vh - 68px)}.dashboard-title{margin-bottom:18px}.hamburger{display:none;background:none;border:0;font-size:24px}.stats{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-bottom:20px}.stat-card{background:#fff;border:1px solid #eef0f4;border-radius:17px;padding:17px;display:flex;flex-direction:column;gap:5px}.stat-card small{color:var(--muted);font-weight:600}.stat-card strong{font-size:30px;color:var(--brown)}.stat-card span{font-size:12px;color:var(--muted)}.chart-bars{display:flex;flex-direction:column;gap:16px}.chart-row{display:grid;grid-template-columns:150px 1fr 48px;gap:11px;align-items:center}.chart-row .progress{height:12px}.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:14px}.data-table{width:100%;border-collapse:collapse;min-width:680px;background:#fff}.data-table th{text-align:left;background:#fafafa;color:var(--muted);font-size:12px;padding:12px;white-space:nowrap}.data-table td{border-top:1px solid var(--border);padding:12px;vertical-align:middle}.data-table td strong{display:block}.split{display:grid;grid-template-columns:1.65fr 1fr;gap:16px}.arch-image{width:100%;border-radius:14px;border:1px solid var(--border)}.empty{padding:30px;text-align:center;color:var(--muted)}.modal-section{padding-top:8px;border-top:1px dashed var(--border);margin-top:12px}
/* Landing */ .landing-head{background:#fff;border-bottom:1px solid var(--border);padding:13px 5vw;display:flex;justify-content:space-between;align-items:center}.landing-head img{height:68px}.hero{max-width:1250px;margin:auto;padding:58px 22px;display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:34px}.hero h1{font-size:47px;color:var(--brown);line-height:1.1}.hero p{font-size:18px;color:var(--muted);max-width:560px}.hero-image{padding:18px;border-radius:28px;background:#fff;box-shadow:var(--shadow);border:1px solid #f4ede6}.features{max-width:1250px;margin:auto;padding:0 22px 50px}.feature{background:#fff;border:1px solid #f1ede8;border-radius:20px;padding:20px}.feature b{display:block;color:var(--brown);font-size:17px;margin-bottom:7px}.feature i{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#fff3e4;color:var(--primary);font-style:normal;font-size:22px;margin-bottom:15px}
@media(max-width:1080px){.stats{grid-template-columns:repeat(3,1fr)}.grid-4,.grid-6{grid-template-columns:repeat(2,1fr)}.split{grid-template-columns:1fr}}
@media(max-width:860px){.login-page{display:block}.login-visual{display:none}.login-box-wrap{min-height:100vh;padding:26px 20px}.login-box .logo-mobile{display:block}.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:none;box-shadow:0 0 30px rgba(0,0,0,.16)}.admin-main{margin:0}.hamburger{display:block}.admin-header{padding:9px 15px}.page-content{padding:16px}.stats{grid-template-columns:repeat(2,1fr)}.hero{grid-template-columns:1fr;padding:28px 18px}.hero h1{font-size:34px}.landing-head img{height:55px}.grid-3{grid-template-columns:1fr}.grid-form{grid-template-columns:1fr}.span-2{grid-column:span 1}}
@media(max-width:520px){.grid-2,.grid-4,.grid-6{grid-template-columns:1fr}.stats{gap:10px}.stat-card{padding:13px}.stat-card strong{font-size:24px}.chart-row{grid-template-columns:95px 1fr 38px}.welcome{padding:16px}.score-circle{width:76px;height:76px}.score-circle:after{width:59px;height:59px}.course-card{align-items:flex-start}}

/* V1.0.2 account & permissions */
.account-chip{display:flex;align-items:center;gap:8px;background:#fff7ed;border:1px solid #ffead5;border-radius:14px;padding:3px 10px 3px 4px;font-weight:700;color:var(--brown)}.account-chip .avatar{width:36px;height:36px}.logout-chip{height:43px;display:inline-flex;align-items:center;padding:0 13px;border-radius:12px;border:1px solid var(--border);font-weight:700;color:#475467;background:#fff}.profile-head{display:flex;align-items:center;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--border);margin-bottom:18px}.avatar-xl{width:60px;height:60px;font-size:23px}.profile-detail{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.profile-detail small{display:block;color:var(--muted);text-transform:uppercase;font-weight:700;font-size:11px;margin-bottom:4px}.permission-note{background:#fffaf2;border:1px solid #ffe3bb;padding:16px;border-radius:14px;margin-bottom:16px}.permission-note p{color:var(--muted);margin:4px 0 14px}.row-actions{display:flex;flex-wrap:wrap;gap:6px;align-items:start}.inline-form{display:inline}.reset-box{position:relative}.reset-box summary{list-style:none;border:1px solid var(--border);background:#fff;padding:8px 10px;border-radius:9px;font-size:13px;font-weight:700;cursor:pointer}.reset-box summary::-webkit-details-marker{display:none}.reset-box form{position:absolute;right:0;top:40px;display:flex;gap:6px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);padding:10px;border-radius:12px;z-index:3}.reset-box input{height:36px;border:1px solid var(--border);border-radius:8px;padding:7px;width:150px}.check-perm{display:flex;align-items:center;gap:8px;font-weight:600}.check-perm input{width:18px;height:18px;accent-color:var(--primary)}
@media(max-width:860px){.account-chip span:last-child,.logout-chip{display:none}.profile-detail{grid-template-columns:1fr}}


/* V1.0.4 - Login căn giữa & popup cài ứng dụng PWA */
.login-box h2,.login-box .subtitle{text-align:center}
.install-modal[hidden]{display:none!important}.install-modal{position:fixed;inset:0;z-index:999;display:flex;align-items:flex-end;justify-content:center;padding:18px}.install-backdrop{position:absolute;inset:0;background:rgba(23,32,51,.46);backdrop-filter:blur(3px)}.install-card{position:relative;width:min(100%,430px);background:#fffdf9;border-radius:26px 26px 20px 20px;padding:26px 20px 20px;text-align:center;box-shadow:0 -12px 48px rgba(23,32,51,.18);animation:installUp .22s ease}.install-close{position:absolute;top:13px;right:14px;width:36px;height:36px;border:0;border-radius:50%;background:#f2f4f7;font-size:25px;line-height:1;color:#667085}.install-logo{width:78px;height:78px;object-fit:contain;margin:0 auto 10px}.install-card h2{font-size:23px;color:var(--brown);margin-bottom:7px}.install-subtitle{color:var(--muted);margin:0 auto 18px;max-width:350px}.install-note{font-size:13px;text-align:left;background:#fff4e6;color:#7a4318;border-radius:12px;padding:12px;margin:12px 0 0}.ios-step{display:flex;gap:10px;align-items:center;text-align:left;padding:10px 0;border-top:1px solid #f0ede8}.ios-step:first-child{border-top:0}.ios-step b{background:#fff0df;color:var(--primary);width:27px;height:27px;border-radius:50%;display:grid;place-items:center;flex:none}.ios-step:last-of-type{margin-bottom:13px}@keyframes installUp{from{transform:translateY(28px);opacity:0}to{transform:translateY(0);opacity:1}}
@media(min-width:861px){.install-modal{align-items:center}.install-card{border-radius:24px}}


/* V1.0.5 - Tối ưu mobile Dashboard & popup cài app */
html.install-modal-open, html.install-modal-open body{overflow:hidden}
.admin-header strong{font-size:18px;line-height:1.2}
.admin-header .header-actions{flex-wrap:wrap;justify-content:flex-end}
.admin-header .bell,.mobile-header .bell{font-size:0}
.admin-header .bell::before,.mobile-header .bell::before{content:"🔔";font-size:18px;line-height:1}
.dashboard-title .btn{white-space:nowrap}
.card img.arch-image{background:#fff}
.table-wrap{-webkit-overflow-scrolling:touch}

@media(max-width:860px){
  .admin-shell{display:block}
  .sidebar{width:min(86vw,320px);padding:14px 12px 18px;border-radius:0 20px 20px 0}
  .sidebar::after{content:"";position:fixed;inset:0;background:rgba(23,32,51,.36);opacity:0;pointer-events:none;transition:.2s;z-index:-1}
  .sidebar.open::after{opacity:1;pointer-events:auto}
  .admin-main{width:100%}
  .admin-header{height:auto;min-height:64px;align-items:flex-start;gap:10px;padding:10px 12px;position:sticky}
  .admin-header > div:nth-child(2){flex:1;min-width:0}
  .admin-header strong{display:block;font-size:16px}
  .admin-header small{font-size:12px;line-height:1.4;word-break:break-word}
  .header-actions{gap:8px}
  .admin-header .bell,.admin-header .account-chip .avatar{width:36px;height:36px}
  .account-chip{padding:0;border-radius:12px;min-width:36px;justify-content:center}
  .page-content{padding:14px 12px 94px}
  .page-content > .card-head,.dashboard-title{flex-direction:column;align-items:stretch}
  .page-content > .card-head .btn,.dashboard-title .btn{width:100%}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .split,.grid.grid-2{grid-template-columns:1fr!important}
  .chart-row{grid-template-columns:105px 1fr 40px;gap:8px}
  .chart-row strong{font-size:13px;line-height:1.35}
  .task-card,.course-card{padding:12px}
  .task-main h3{font-size:14px;line-height:1.45}
  .data-table{min-width:560px}
  .profile-head{align-items:flex-start}
  .install-modal{padding:0;align-items:flex-end}
  .install-backdrop{background:rgba(23,32,51,.42)}
  .install-card{width:100%;max-width:none;border-radius:24px 24px 0 0;padding:18px 16px calc(16px + env(safe-area-inset-bottom));max-height:86vh;overflow:auto}
  .install-logo{width:64px;height:64px;margin-bottom:8px}
  .install-card h2{font-size:20px;margin-bottom:6px}
  .install-subtitle{font-size:14px;line-height:1.5;margin-bottom:14px}
  .install-note{font-size:12px;padding:10px}
  .ios-step{padding:9px 0;gap:9px}
  .ios-step b{width:24px;height:24px;font-size:13px}
}
@media(max-width:640px){
  h1{font-size:24px}
  h2{font-size:19px}
  .admin-brand img{height:60px}
  .sidebar-nav a{padding:10px 11px;font-size:14px}
  .stats{grid-template-columns:1fr 1fr}
  .stat-card{padding:14px 13px;border-radius:16px}
  .stat-card strong{font-size:26px}
  .chart-row{grid-template-columns:92px 1fr 36px}
  .table-wrap{border-radius:12px}
  .data-table{min-width:520px}
}
@media(max-width:420px){
  .page-content{padding:12px 10px 92px}
  .stats{grid-template-columns:1fr}
  .welcome{display:block}
  .score-circle{margin-top:14px}
  .chart-row{grid-template-columns:84px 1fr 34px}
  .dashboard-title h1{margin-bottom:4px}
  .install-card{padding:16px 14px calc(14px + env(safe-area-inset-bottom))}
  .install-close{top:10px;right:10px;width:32px;height:32px}
}


/* V1.0.6 - Mobile 3 cột & chống tràn ngang */
html,body{max-width:100%;overflow-x:hidden}
.admin-main,.page-content,.card,.split,.grid,.stats{max-width:100%}
.page-content > *{max-width:100%}
.card,.stat-card,.task-card,.course-card,.table-wrap{min-width:0}
.arch-image{width:100%;height:auto;object-fit:contain}
.task-main,.stat-card small,.stat-card span,.chart-row strong{word-break:break-word}

@media(max-width:860px){
  .page-content{overflow-x:hidden}
  .stats{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:10px}
  .stat-card{padding:12px 10px;border-radius:14px;min-height:112px;justify-content:space-between}
  .stat-card small{font-size:11px;line-height:1.35}
  .stat-card strong{font-size:24px;line-height:1.1}
  .stat-card span{font-size:11px;line-height:1.35}
  .chart-row{grid-template-columns:88px 1fr 34px;gap:8px}
  .chart-row strong{font-size:12px}
  .split > .card,.grid.grid-2 > .card{width:100%;overflow:hidden}
  .table-wrap{overflow-x:auto;overflow-y:hidden}
  .data-table{min-width:480px}
  .page-content .card img.arch-image{display:block;margin:0 auto}
}
@media(max-width:520px){
  .page-content{padding:12px 10px 90px}
  .stats{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:8px}
  .stat-card{padding:10px 8px;min-height:104px}
  .stat-card small{font-size:10px}
  .stat-card strong{font-size:22px}
  .stat-card span{font-size:10px}
  .dashboard-title h1,.page-content > .card-head h1{font-size:22px;line-height:1.2}
  .page-content > .card-head p,.dashboard-title p{font-size:13px;line-height:1.45}
  .chart-row{grid-template-columns:78px 1fr 30px}
  .chart-row b{font-size:12px}
  .data-table th,.data-table td{padding:10px 8px;font-size:12px}
}
@media(max-width:390px){
  .stats{grid-template-columns:repeat(3,minmax(0,1fr))!important;gap:7px}
  .stat-card{padding:9px 7px;min-height:98px}
  .stat-card small{font-size:9px}
  .stat-card strong{font-size:20px}
  .stat-card span{font-size:9px}
  .header-actions{gap:6px}
}