:root{
  --primary:#1F4E79; --primary-light:#DBE9F7; --primary-dark:#153a5c;
  --accent:#B8860B; --accent-light:#FFF2CC;
  --good:#2F7A3D; --good-light:#E6F4EA;
  --bad:#A33333; --bad-light:#FDEEEE;
  --purple:#7A3D8C; --purple-light:#F3E6F7;
  --gray:#555555; --text:#222222; --bg:#F4F7FA; --card:#FFFFFF;
  --border:#DCE3EA;
  font-family: "Segoe UI", "Calibri", Arial, sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);}
body{min-height:100vh;}
a{color:inherit;}
button{font-family:inherit;cursor:pointer;}
img{max-width:100%;}

/* ===== App shell ===== */
#app{display:flex; min-height:100vh;}
.hidden{display:none !important;}

/* ---- Login screen ---- */
#login-screen{
  width:100%; min-height:100vh; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding:20px;
}
.login-card{
  background:var(--card); border-radius:14px; padding:36px 32px; width:100%; max-width:400px;
  box-shadow:0 20px 50px rgba(0,0,0,0.25);
}
.login-card h1{font-size:1.35rem; color:var(--primary); margin:0 0 4px; text-align:center;}
.login-card .subtitle{font-size:.85rem; color:var(--gray); text-align:center; margin-bottom:22px;}
.login-card label{display:block; font-size:.82rem; font-weight:600; margin:14px 0 5px; color:var(--text);}
.login-card select, .login-card input{
  width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:8px; font-size:.95rem;
}
.login-card select:focus, .login-card input:focus{outline:2px solid var(--primary); border-color:var(--primary);}
.btn{
  display:inline-block; padding:11px 20px; border-radius:8px; border:none; font-weight:700; font-size:.92rem;
  background:var(--primary); color:#fff; transition:background .15s;
}
.btn:hover{background:var(--primary-dark);}
.btn.block{width:100%; margin-top:20px;}
.btn.secondary{background:var(--accent-light); color:var(--accent);}
.btn.secondary:hover{background:#ffe9a8;}
.btn.ghost{background:transparent; color:var(--primary); border:1px solid var(--primary);}
.btn.small{padding:6px 12px; font-size:.8rem;}
.login-error{color:var(--bad); font-size:.82rem; margin-top:10px; min-height:1em;}
.login-mode-badge{
  display:inline-block; font-size:.7rem; font-weight:700; padding:3px 9px; border-radius:20px;
  background:var(--accent-light); color:var(--accent); margin-bottom:14px;
}
.login-foot{text-align:center; margin-top:18px; font-size:.78rem; color:var(--gray);}
.login-foot a{color:var(--primary); text-decoration:underline; cursor:pointer;}

/* ---- Sidebar ---- */
#sidebar{
  width:280px; flex-shrink:0; background:var(--primary); color:#fff; min-height:100vh;
  display:flex; flex-direction:column; position:sticky; top:0; align-self:flex-start; height:100vh; overflow-y:auto;
}
#sidebar .brand{padding:22px 20px 14px; border-bottom:1px solid rgba(255,255,255,.15);}
#sidebar .brand .app-name{font-weight:800; font-size:1.05rem; line-height:1.3;}
#sidebar .brand .app-sub{font-size:.72rem; opacity:.8; margin-top:3px;}
#sidebar .user-box{padding:14px 20px; border-bottom:1px solid rgba(255,255,255,.15); font-size:.85rem;}
#sidebar .user-box .name{font-weight:700;}
#sidebar .user-box .role{font-size:.72rem; opacity:.8;}
#sidebar nav{flex:1; padding:10px 0;}
#sidebar .nav-item{
  display:block; padding:10px 20px; font-size:.85rem; color:#fff; text-decoration:none; opacity:.88;
  border-left:3px solid transparent; cursor:pointer;
}
#sidebar .nav-item:hover{background:rgba(255,255,255,.08); opacity:1;}
#sidebar .nav-item.active{background:rgba(255,255,255,.14); border-left-color:var(--accent); opacity:1; font-weight:700;}
#sidebar .nav-section-label{padding:14px 20px 6px; font-size:.68rem; text-transform:uppercase; letter-spacing:.05em; opacity:.6;}
#sidebar .module-week{
  display:inline-block; min-width:20px; text-align:center; font-size:.68rem; font-weight:700;
  background:rgba(255,255,255,.18); border-radius:5px; padding:1px 5px; margin-right:7px;
}
#sidebar .logout-box{padding:14px 20px; border-top:1px solid rgba(255,255,255,.15);}
#sidebar .logout-box button{width:100%;}

/* ---- Main content ---- */
#main{flex:1; min-width:0; padding:28px 34px 60px; max-width:980px;}
.crumb{font-size:.78rem; color:var(--gray); margin-bottom:8px;}
.page-title{font-size:1.5rem; color:var(--primary); margin:0 0 4px; font-weight:800;}
.page-sub{color:var(--gray); font-size:.9rem; margin-bottom:22px;}
.tabs{display:flex; gap:6px; flex-wrap:wrap; margin-bottom:22px; border-bottom:2px solid var(--border); padding-bottom:0;}
.tab-btn{
  padding:9px 16px; border:none; background:transparent; font-size:.85rem; font-weight:600; color:var(--gray);
  border-bottom:3px solid transparent; margin-bottom:-2px;
}
.tab-btn.active{color:var(--primary); border-bottom-color:var(--primary);}
.tab-btn:hover{color:var(--primary);}

/* ---- Module grid (dashboard) ---- */
.module-grid{display:grid; grid-template-columns:repeat(auto-fill, minmax(230px,1fr)); gap:16px;}
.module-card{
  background:var(--card); border:1px solid var(--border); border-radius:12px; padding:16px 16px 14px;
  text-decoration:none; color:var(--text); transition:box-shadow .15s, transform .15s; cursor:pointer;
}
.module-card:hover{box-shadow:0 8px 20px rgba(31,78,121,.14); transform:translateY(-2px);}
.module-card .wk{font-size:.68rem; font-weight:700; color:var(--accent); background:var(--accent-light); display:inline-block; padding:2px 8px; border-radius:20px; margin-bottom:8px;}
.module-card .title{font-weight:700; font-size:.95rem; margin-bottom:10px; min-height:2.4em;}
.module-card .progress-bar{height:7px; border-radius:6px; background:var(--border); overflow:hidden; margin-bottom:6px;}
.module-card .progress-bar .fill{height:100%; background:var(--good); border-radius:6px;}
.module-card .progress-label{font-size:.72rem; color:var(--gray);}

/* ---- Content blocks (materi / practice stream) ---- */
.block-h1{color:var(--primary); font-size:1.28rem; font-weight:800; margin:30px 0 12px; border-bottom:2px solid var(--primary); padding-bottom:6px;}
.block-h1:first-child{margin-top:0;}
.block-h2{color:var(--primary); font-size:1.1rem; font-weight:700; margin:22px 0 10px;}
.block-h3{color:var(--accent); font-size:1rem; font-weight:700; margin:18px 0 8px;}
.block-h4{color:var(--text); font-size:.94rem; font-weight:700; margin:14px 0 6px;}
.block-p{font-size:.92rem; line-height:1.65; margin:0 0 14px; text-align:justify;}
.block-p.bold{font-weight:700;}
.block-p.italic{font-style:italic;}
.block-bullet, .block-num{font-size:.92rem; line-height:1.6; margin:0 0 8px; padding-left:22px; position:relative;}
.block-bullet:before{content:"•"; position:absolute; left:4px; color:var(--primary); font-weight:800;}
.block-num .num-marker{position:absolute; left:0; font-weight:800; color:var(--primary);}
.block-spacer{height:6px;}

.block-table-wrap{overflow-x:auto; margin:0 0 18px; border:1px solid var(--border); border-radius:8px;}
table.block-table{width:100%; border-collapse:collapse; font-size:.85rem;}
table.block-table th{background:var(--primary); color:#fff; padding:9px 12px; text-align:left; font-weight:700;}
table.block-table td{padding:9px 12px; border-top:1px solid var(--border); vertical-align:top;}
table.block-table tr:nth-child(even) td{background:#F7FAFD;}

.callout{border-radius:10px; padding:14px 16px; margin:0 0 18px; border-left:5px solid; font-size:.88rem; line-height:1.6;}
.callout .callout-label{font-weight:800; display:block; margin-bottom:6px; font-size:.82rem;}
.callout.bad{background:var(--bad-light); border-color:var(--bad); color:#7a2626;}
.callout.bad .callout-label{color:var(--bad);}
.callout.good{background:var(--good-light); border-color:var(--good); color:#1f5429;}
.callout.good .callout-label{color:var(--good);}
.callout.accent{background:var(--accent-light); border-color:var(--accent); color:#7a5c08;}
.callout.accent .callout-label{color:var(--accent);}
.callout.purple{background:var(--purple-light); border-color:var(--purple); color:#552a61;}
.callout.purple .callout-label{color:var(--purple);}
.callout.primary{background:var(--primary-light); border-color:var(--primary); color:var(--primary-dark);}
.callout.primary .callout-label{color:var(--primary);}
.callout.gray{background:#f0f0f0; border-color:var(--gray); color:#333;}

.block-image-wrap{text-align:center; margin:14px 0 20px;}
.block-image-wrap img{border:1px solid var(--border); border-radius:10px; max-width:100%; }
.block-image-wrap .caption{font-size:.78rem; font-style:italic; color:var(--gray); margin-top:8px;}

/* ---- Quiz cards ---- */
.qcard{background:var(--card); border:1px solid var(--border); border-radius:12px; padding:18px 20px; margin-bottom:16px;}
.qcard .qnum{display:inline-block; font-size:.72rem; font-weight:800; color:#fff; background:var(--primary); padding:3px 10px; border-radius:20px; margin-bottom:10px;}
.qcard.pgm .qnum{background:var(--purple);}
.qcard.essay .qnum{background:var(--good);}
.qcard .stem{font-size:.92rem; line-height:1.6; margin-bottom:12px;}
.qcard .opt{
  display:flex; align-items:flex-start; gap:10px; padding:9px 12px; border:1px solid var(--border); border-radius:8px;
  margin-bottom:8px; font-size:.88rem; cursor:pointer; transition:background .12s;
}
.qcard .opt:hover{background:#F7FAFD;}
.qcard .opt .letter{
  flex-shrink:0; width:22px; height:22px; border-radius:50%; border:2px solid var(--border); display:flex;
  align-items:center; justify-content:center; font-weight:700; font-size:.75rem; color:var(--gray);
}
.qcard .opt.selected .letter{border-color:var(--primary); background:var(--primary); color:#fff;}
.qcard .opt.correct{background:var(--good-light); border-color:var(--good);}
.qcard .opt.correct .letter{background:var(--good); border-color:var(--good); color:#fff;}
.qcard .opt.wrong{background:var(--bad-light); border-color:var(--bad);}
.qcard .opt.wrong .letter{background:var(--bad); border-color:var(--bad); color:#fff;}
.qcard .stmt-row{display:flex; align-items:center; gap:10px; padding:6px 0; font-size:.88rem;}
.qcard .stmt-row .stmt-num{font-weight:800; color:var(--purple); width:18px;}
.qcard .feedback{margin-top:12px; padding:12px 14px; border-radius:8px; font-size:.85rem; line-height:1.6;}
.qcard .feedback.ok{background:var(--good-light); color:#1f5429;}
.qcard .feedback.no{background:var(--bad-light); color:#7a2626;}
.qcard .feedback b{display:block; margin-bottom:4px;}
.qcard .level-badge{font-size:.68rem; color:var(--gray); background:#eef2f6; padding:2px 8px; border-radius:10px; margin-left:8px;}
.qcard textarea{
  width:100%; min-height:110px; border:1px solid var(--border); border-radius:8px; padding:10px 12px; font-size:.88rem;
  font-family:inherit; resize:vertical;
}
.qcard .essay-reveal{margin-top:12px;}
.qcard .rubrik-table{margin-top:10px;}

.quiz-toolbar{display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; flex-wrap:wrap; gap:10px;}
.quiz-score-pill{
  font-weight:800; font-size:.85rem; padding:7px 16px; border-radius:20px; background:var(--primary-light); color:var(--primary);
}
.quiz-score-pill.done{background:var(--good-light); color:var(--good);}

/* ---- Progress page ---- */
.progress-table{width:100%; border-collapse:collapse; font-size:.86rem; background:var(--card); border-radius:10px; overflow:hidden;}
.progress-table th{background:var(--primary); color:#fff; padding:10px 12px; text-align:left;}
.progress-table td{padding:9px 12px; border-top:1px solid var(--border);}
.progress-table tr:nth-child(even) td{background:#F7FAFD;}
.pill-score{font-weight:700; padding:3px 10px; border-radius:20px; font-size:.78rem;}
.pill-score.high{background:var(--good-light); color:var(--good);}
.pill-score.mid{background:var(--accent-light); color:var(--accent);}
.pill-score.low{background:var(--bad-light); color:var(--bad);}
.pill-score.none{background:#eee; color:var(--gray);}

/* ---- Admin page ---- */
.admin-note{background:var(--accent-light); border-left:5px solid var(--accent); padding:14px 16px; border-radius:8px; font-size:.85rem; margin-bottom:20px; line-height:1.6;}
.admin-table{width:100%; border-collapse:collapse; font-size:.86rem;}
.admin-table th{text-align:left; padding:8px 10px; background:var(--primary); color:#fff;}
.admin-table td{padding:6px 10px; border-top:1px solid var(--border);}
.admin-table input{width:100%; padding:6px 8px; border:1px solid var(--border); border-radius:6px;}
.admin-log{background:#0d1b2a; color:#c7e6ff; font-family:monospace; font-size:.78rem; padding:14px; border-radius:8px; margin-top:16px; max-height:240px; overflow-y:auto; white-space:pre-wrap;}

/* ---- Misc ---- */
.empty-state{text-align:center; padding:60px 20px; color:var(--gray);}
.badge-mode{position:fixed; bottom:14px; right:14px; background:var(--accent); color:#fff; font-size:.72rem; font-weight:700; padding:6px 14px; border-radius:20px; box-shadow:0 4px 12px rgba(0,0,0,.2); z-index:50;}

@media (max-width:820px){
  #app{flex-direction:column;}
  #sidebar{width:100%; height:auto; min-height:0; position:relative; top:auto;}
  #sidebar nav{max-height:260px;}
  #main{padding:20px 16px 50px; max-width:100%;}
}