:root{
  --bg:#F4F8F4;
  --paper:#FFFFFF;
  --ink:#20302A;
  --ink-soft:#5B6E64;
  --line:#DDE8E0;
  --primary:#1E5B52;
  --primary-dark:#153F39;
  --primary-tint:#DEEEE8;
  --gold:#F2A73B;
  --gold-tint:#FCEBCC;
  --coral:#E2664B;
  --coral-tint:#FBE1DA;
  --radius:16px;
  --shadow:0 6px 24px rgba(30,64,57,0.08);
  --font-display:'Fraunces', serif;
  --font-body:'Be Vietnam Pro', sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3{font-family:var(--font-display);margin:0;font-weight:600;}
.eyebrow{
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--primary);
  font-weight:700;
  display:flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--gold);display:inline-block;border-radius:2px;}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}
.skip-link{position:absolute;left:-999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;z-index:200;}
.skip-link:focus{left:0;}
a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--gold);outline-offset:2px;}
header.site{
  position:sticky;top:0;z-index:100;
  background:rgba(244,248,244,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:8px 24px;max-width:none;margin:0;gap:20px;
}
.brand{display:flex;align-items:center;gap:14px;font-family:var(--font-display);font-weight:700;font-size:24px;line-height:1.15;color:var(--primary-dark);flex:none;}
.brand .mark{width:96px;height:96px;flex:none;object-fit:contain;}
.brand > span{display:flex;flex-direction:column;white-space:nowrap;}
#school-name-brand::after{content:"Giáo viên: Hoàng Thanh Trung";margin-top:4px;font-family:var(--font-body);font-size:16px;line-height:1.2;font-weight:bold;color:darkblue;}
nav.menu{display:flex;align-items:center;gap:8px;flex:1;flex-wrap:nowrap;margin-left:48px;transform:none;white-space:nowrap;}
nav.menu a{
  font-size:12.5px;font-weight:600;color:var(--ink-soft);
  padding:7px 8px;border-radius:999px;text-decoration:none;
  transition:background .15s,color .15s;
}
nav.menu a:hover{background:var(--primary-tint);color:var(--primary-dark);}
nav.menu a.active{background:var(--primary-tint);color:var(--primary-dark);}
.updated-pill{
  font-size:12.5px;color:var(--ink-soft);background:var(--paper);border:1px solid var(--line);
  padding:6px 12px;border-radius:999px;white-space:nowrap;margin-left:auto;
}
.hamburger{display:none;}
.page-shell{max-width:1100px;margin:0 auto;padding:48px 24px 64px;}
.page-hero{padding:36px 0 12px;}
.page-hero h1{font-size:clamp(30px,4vw,42px);margin-top:8px;}
.page-hero p{color:var(--ink-soft);margin-top:12px;max-width:700px;}
.subpage-shell{padding-top:48px;}
.subpage-hero{
  width:100vw;margin-top:-48px;margin-left:calc(50% - 50vw);
  padding:72px max(24px, calc((100vw - 1100px) / 2 + 24px)) 48px;
  background:linear-gradient(160deg,var(--primary-dark) 0%,var(--primary) 62%,#2C7268 100%);
  color:#fff;
}
.subpage-hero .eyebrow{color:#B9E0D6;}
.subpage-hero h1{color:#fff;}
.subpage-hero p{color:#DCEBE6;}
.page-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:28px;}
@media (max-width:760px){.page-grid{grid-template-columns:1fr;}}
.page-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 20px;}
.page-card h2{font-size:26px;margin-bottom:8px;}
.page-card h3{font-size:20px;margin:0 0 12px;}
.page-card p, .page-card li{color:var(--ink-soft);font-size:14.5px;}
.page-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
.page-list li{padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#FAFCFA;}
.metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px;}
@media (max-width:760px){.metric-row{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:480px){.metric-row{grid-template-columns:1fr;}}
.metric-box{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:18px 16px;}
.metric-box strong{display:block;font-family:var(--font-display);font-size:30px;color:var(--primary-dark);}
.metric-box span{font-size:13px;color:var(--ink-soft);font-weight:600;}
.data-status{margin:0 0 16px;color:var(--ink-soft);font-size:13px;}
.data-status.success{color:var(--primary);}
.data-status.warning{padding:10px 12px;border:1px solid #F0CE8F;border-radius:10px;background:var(--gold-tint);color:#8A5A0C;}
.violation-count-medium td{background:#FFF3CD;}
.violation-count-high td{background:#FDE2E1;}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--paper);box-shadow:var(--shadow);margin-top:22px;}
.page-table{width:100%;border-collapse:collapse;min-width:600px;}
.page-table th, .page-table td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;}
.page-table th{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);}
.page-table tr:last-child td{border-bottom:none;}
.tag{display:inline-block;padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700;}
.tag.present{background:var(--primary-tint);color:var(--primary-dark);}
.tag.absent{background:var(--coral-tint);color:#9A3A24;}
.teacher-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.teacher-group{padding:22px;border-radius:var(--radius);}
.teacher-group-male{background:#E4F3EC;}
.teacher-group-female{background:#FBE7ED;}
.teacher-group>h2{font-size:26px;margin:0 0 16px;color:var(--primary-dark);}
.teacher-list{display:grid;grid-template-columns:1fr;gap:20px;}
.teacher-data-status{margin-bottom:18px;color:var(--ink-soft);font-size:13px;}
.teacher-data-status.success{color:var(--primary);}
.teacher-data-status.warning{padding:10px 12px;border:1px solid #F0CE8F;border-radius:10px;background:var(--gold-tint);color:#8A5A0C;}
.teacher-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;}
.teacher-card h2{font-size:22px;margin-bottom:14px;color:var(--primary-dark);}
.teacher-table{width:100%;border-collapse:collapse;font-size:14px;}
.teacher-table th,.teacher-table td{padding:11px 0;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;}
.teacher-table tr:last-child th,.teacher-table tr:last-child td{border-bottom:none;padding-bottom:0;}
.teacher-table th{width:46%;color:var(--ink-soft);font-size:12px;font-weight:600;}
.teacher-table td{font-weight:600;}
.teacher-table .zalo-title{text-align:center;color:var(--ink);font-size:13px;padding-top:16px;}
.teacher-table .zalo-content{text-align:center;}
.zalo-content .zalo-entry{display:flex;flex-direction:column;align-items:center;}
.room-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:5px;}
.room-list li{padding:3px 8px;border-radius:6px;background:var(--primary-tint);color:var(--primary-dark);font-size:12px;}
.teacher-table code{display:inline-block;padding:4px 8px;border-radius:6px;background:var(--gold-tint);color:#8A5A0C;font-family:var(--font-body);font-size:12px;letter-spacing:.03em;}
.zalo-qr{width:132px;height:132px;padding:8px;margin-bottom:8px;background:#fff;border:1px solid var(--line);border-radius:8px;}
.zalo-qr img{width:114px;height:114px;}
.zalo-value{max-width:180px;overflow-wrap:anywhere;}
.missing-data{color:var(--ink-soft);font-size:13px;font-weight:500;}
@media (max-width:960px){.teacher-groups{grid-template-columns:1fr;}}
@media (max-width:880px){
  nav.menu{display:none;}
  .hamburger{display:flex;}
}
@media (max-width:520px){
  .nav-inner{padding:8px 16px;}
  .brand{font-size:20px;}
  .brand .mark{width:76px;height:76px;}
}
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,var(--primary-dark) 0%, var(--primary) 62%, #2C7268 100%);
  color:#fff;
  padding:64px 0 40px;
}
.hero-inner{display:grid;grid-template-columns:1.15fr 0.85fr;gap:40px;align-items:center;}
@media (max-width:880px){ .hero-inner{grid-template-columns:1fr;} }
.home-columns{display:grid;grid-template-columns:3fr 2fr;align-items:stretch;}
.home-columns > .hero,.home-columns > #thong-ke{min-width:0;}
.home-columns > .hero .wrap,.home-columns > #thong-ke .wrap{max-width:none;padding-left:32px;padding-right:32px;}
.home-columns > #thong-ke{display:flex;align-items:flex-start;}
@media (max-width:880px){
  .home-columns{grid-template-columns:1fr;}
  .home-columns > #thong-ke{display:block;}
}
.hero h1{font-size:clamp(30px,4.4vw,46px);line-height:1.08;color:#fff;}
.hero p.lead{font-size:16.5px;color:#DCEBE6;max-width:52ch;margin-top:14px;}
.hero .rules-content{max-width:none;margin-top:18px;text-align:left;line-height:1.65;}
.rules-content .rule-group{padding:16px 0;border-top:1px solid rgba(255,255,255,.2);}
.rules-content .rule-group:first-child{padding-top:0;border-top:none;}
.rules-content h2{font-family:var(--font-display);font-size:22px;line-height:1.2;color:#fff;margin:0 0 8px;}
.rules-content p,.rules-content li{font-size:14.5px;color:#DCEBE6;}
.rules-content p{margin:0 0 8px;}
.rules-content ul{margin:0;padding-left:22px;}
.rules-content li{padding-left:4px;margin:5px 0;}
.rules-content .rule-closing{padding-top:16px;border-top:1px solid rgba(255,255,255,.2);}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px;}
.hero-badge{
  background:rgba(255,255,255,0.1);border:1px solid rgba(255,255,255,0.22);
  padding:8px 14px;border-radius:999px;font-size:13px;font-weight:600;
  display:flex;align-items:center;gap:7px;
}
.hero-art{position:relative;display:flex;justify-content:center;}
.ring-card{
  background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.18);
  border-radius:20px;padding:26px;backdrop-filter:blur(4px);
  display:flex;flex-direction:column;align-items:center;gap:6px;width:100%;max-width:300px;
}
.donut{position:relative;width:168px;height:168px;}
.donut svg{transform:rotate(-90deg);}
.donut-label{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.donut-label strong{font-family:var(--font-display);font-size:32px;line-height:1;}
.donut-label span{font-size:12px;color:#DCEBE6;margin-top:4px;}
.ring-legend{display:flex;gap:18px;margin-top:14px;font-size:13px;}
.ring-legend div{display:flex;align-items:center;gap:6px;}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;}
section{padding:56px 0;}
section.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:26px;}
.section-head h2{font-size:clamp(22px,2.6vw,30px);margin-top:6px;}
.section-head p{color:var(--ink-soft);font-size:14.5px;max-width:56ch;margin-top:6px;}
.banner{
  padding:12px 16px;border-radius:12px;font-size:13.5px;font-weight:600;
  display:flex;align-items:center;gap:10px;margin-bottom:22px;
}
.banner.warn{background:var(--gold-tint);color:#8A5A0C;border:1px solid #F0CE8F;}
.banner.error{background:var(--coral-tint);color:#9A3A24;border:1px solid #F0B3A2;}
.stat-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px;}
#stats-body{grid-template-columns:1fr;}
#absent-stats-body{grid-template-columns:repeat(2,minmax(0,1fr));}
@media (max-width:520px){.stat-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.stat-grid{grid-template-columns:1fr;}}
@media (max-width:520px){#absent-stats-body{grid-template-columns:1fr;}}
.stat-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 20px 18px;box-shadow:var(--shadow);
}
.stat-card .n{font-family:var(--font-display);font-size:32px;color:var(--primary-dark);}
.stat-card .l{font-size:13px;color:var(--ink-soft);margin-top:2px;font-weight:600;}
.stat-card.absent .n{color:var(--coral);}
.stat-card.present .n{color:var(--primary);}
.meal-annual-total{display:flex;align-items:baseline;gap:12px;margin:16px 0;color:var(--primary-dark);}
.meal-annual-total strong{font-family:var(--font-display);font-size:24px;}
.meal-annual-total span{font-family:var(--font-display);font-size:24px;font-weight:600;color:var(--primary-dark);}
.meal-summary{grid-template-columns:repeat(6,minmax(0,1fr));margin:20px 0 22px;}
.meal-summary .stat-card{padding:16px 14px;}
.meal-summary .stat-card .n{font-size:25px;overflow-wrap:anywhere;}
@media (max-width:960px){.meal-summary{grid-template-columns:repeat(4,minmax(0,1fr));}}
@media (max-width:520px){.meal-summary{grid-template-columns:repeat(2,minmax(0,1fr));}}
.date-filter{display:inline-block;margin:4px 10px 14px 0;color:var(--ink-soft);font-size:14px;}
.date-select{min-width:138px;margin-bottom:14px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);font:inherit;}
.secondary-button{margin:4px 0 14px;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--primary-dark);font:inherit;font-weight:600;cursor:pointer;}
.secondary-button:hover{background:var(--primary-tint);}
.secondary-button:disabled,.date-select:disabled{cursor:not-allowed;opacity:.6;}
.meal-week-a td{background:#FFF9EC;}
.meal-week-b td{background:#F0F7F4;}
.meal-table th,.meal-table td{border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
.meal-table th:last-child,.meal-table td:last-child{border-right:1px solid var(--line);}
.meal-table tr:last-child td{border-bottom:none;}
.meal-table{min-width:900px;}
.meal-table .meal-week-cell{vertical-align:middle;text-align:center;font-weight:700;}
.meal-table .meal-month-total-cell{vertical-align:middle;text-align:center;font-size:18px;color:#E00000;}
.room-tabs{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px;margin-bottom:22px;}
.room-tab{
  border:1px solid var(--line);background:var(--paper);color:var(--ink);
  padding:9px 16px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;
  transition:all .15s;
}
.room-tab.active{background:var(--primary);border-color:var(--primary);color:#fff;}
.room-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
}
.room-card .rc-head{
  padding:20px 24px;border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;
}
.room-card .rc-head h3{font-size:20px;}
.teacher-chip{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-soft);}
.teacher-chip .avatar{
  width:28px;height:28px;border-radius:50%;background:var(--gold-tint);color:#8A5A0C;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;flex:none;
}
table{width:100%;border-collapse:collapse;font-size:14px;}
thead th{
  text-align:left;font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;
  color:var(--ink-soft);padding:12px 24px;border-bottom:1px solid var(--line);font-weight:700;
}
tbody td{padding:12px 24px;border-bottom:1px solid var(--line);vertical-align:middle;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:#FAFCFA;}
.name-cell{font-weight:600;}
.icon-pair{display:flex;gap:14px;}
.status-icon{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-soft);}
.status-icon svg{width:20px;height:20px;flex:none;}
.status-icon.on{color:var(--primary-dark);font-weight:600;}
.status-icon.off svg{opacity:.35;}
.pill{padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700;display:inline-block;}
.pill.present{background:var(--primary-tint);color:var(--primary-dark);}
.pill.absent{background:var(--coral-tint);color:#9A3A24;}
.reason{color:var(--ink-soft);font-size:13px;}
.filter-row{display:flex;gap:10px;align-items:center;margin-bottom:18px;flex-wrap:wrap;}
select, input[type=text]{
  font-family:var(--font-body);font-size:14px;padding:9px 14px;border-radius:10px;
  border:1px solid var(--line);background:var(--paper);color:var(--ink);
}
.table-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto;}
.bar-track{width:120px;height:8px;background:var(--line);border-radius:99px;overflow:hidden;display:inline-block;vertical-align:middle;margin-right:10px;}
.bar-fill{height:100%;background:var(--coral);border-radius:99px;}
.total-note{margin-top:14px;font-size:13.5px;color:var(--ink-soft);}
.total-note strong{color:var(--coral);font-family:var(--font-display);font-size:16px;}
.violation-list{display:flex;flex-direction:column;gap:10px;}
.violation-item{
  background:var(--paper);border:1px solid var(--line);border-left:4px solid var(--coral);
  border-radius:12px;padding:14px 18px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  box-shadow:var(--shadow);
}
.violation-item .who{font-weight:700;}
.violation-item .meta{font-size:13px;color:var(--ink-soft);margin-top:2px;}
.violation-item .when{font-size:12.5px;color:var(--ink-soft);white-space:nowrap;}
.empty-state{text-align:center;padding:40px 20px;color:var(--ink-soft);font-size:14px;}
footer{background:var(--primary-dark);color:#DCEBE6;padding:36px 0;font-size:13.5px;}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;}
footer .footer-info{display:flex;flex-direction:column;gap:4px;}
footer a{text-decoration:underline;text-underline-offset:2px;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
}