:root{
  --bg:#f5f7fb;
  --card:#ffffff;
  --text:#172033;
  --muted:#6d7688;
  --line:#e5e9f0;
  --accent:#334155;
  --accent2:#0f172a;
  --good:#15803d;
  --warn:#a16207;
  --bad:#b91c1c;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text)}
button,input,select{font:inherit}
.app{display:flex;min-height:100vh}
.sidebar{
  width:245px;background:#0f172a;color:white;padding:22px 16px;position:fixed;top:0;bottom:0;left:0;overflow:auto
}
.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}
.logo{width:46px;height:46px;border-radius:12px;background:white;color:#0f172a;display:grid;place-items:center;font-weight:800}
.brand h1{font-size:18px;margin:0}
.brand p{font-size:12px;margin:3px 0 0;color:#cbd5e1}
nav{display:grid;gap:6px}
.nav-item{
  width:100%;border:0;background:transparent;color:#dbe4ef;text-align:left;padding:12px 14px;border-radius:10px;cursor:pointer
}
.nav-item:hover,.nav-item.active{background:#1e293b;color:white}
.main{margin-left:245px;width:calc(100% - 245px);padding:24px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}
.topbar h2{margin:0;font-size:28px}
.topbar p{margin:4px 0 0;color:var(--muted)}
.top-actions{display:flex;gap:10px;align-items:center}
input,select{
  border:1px solid var(--line);background:white;border-radius:10px;padding:10px 12px;min-height:42px
}
#globalSearch{width:240px}
.primary{
  border:0;background:var(--accent2);color:white;padding:11px 16px;border-radius:10px;cursor:pointer
}
.secondary{
  border:1px solid var(--line);background:white;color:var(--text);padding:10px 14px;border-radius:10px;cursor:pointer
}
.grid{display:grid;gap:16px}
.grid.cards{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;
  box-shadow:0 4px 16px rgba(15,23,42,.04)
}
.metric .label{font-size:13px;color:var(--muted)}
.metric .value{font-size:28px;font-weight:800;margin-top:8px}
.metric .note{font-size:12px;color:var(--muted);margin-top:4px}
.section-title{display:flex;justify-content:space-between;align-items:center;margin:24px 0 12px}
.section-title h3{margin:0;font-size:18px}
table{width:100%;border-collapse:collapse;background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
th{background:#f8fafc;color:#475569;font-size:12px;text-transform:uppercase;letter-spacing:.03em}
tr:last-child td{border-bottom:0}
.badge{display:inline-block;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:700}
.good{background:#dcfce7;color:var(--good)}
.warn{background:#fef3c7;color:var(--warn)}
.bad{background:#fee2e2;color:var(--bad)}
.neutral{background:#e2e8f0;color:#475569}
.toolbar{display:flex;gap:10px;justify-content:space-between;align-items:center;margin-bottom:14px}
.toolbar .left,.toolbar .right{display:flex;gap:10px;align-items:center}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-grid label{display:grid;gap:6px;font-size:13px;color:#475569}
.form-grid .full{grid-column:1/-1}
.form-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}
.modal{
  position:fixed;inset:0;background:rgba(15,23,42,.48);display:grid;place-items:center;padding:20px;z-index:10
}
.hidden{display:none!important}
.modal-card{background:white;width:min(700px,96vw);max-height:90vh;overflow:auto;border-radius:18px;padding:22px;position:relative}
.close{position:absolute;right:14px;top:10px;border:0;background:transparent;font-size:28px;cursor:pointer}
.attendance-list{display:grid;gap:10px}
.attendance-row{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);background:white;border-radius:12px;padding:12px 14px}
.attendance-options{display:flex;gap:6px;flex-wrap:wrap}
.attendance-options button{border:1px solid var(--line);background:white;border-radius:8px;padding:7px 10px;cursor:pointer}
.attendance-options button.selected{background:#0f172a;color:white;border-color:#0f172a}
.report-box{min-height:180px}
.bar{height:10px;border-radius:999px;background:#e2e8f0;overflow:hidden;margin-top:8px}
.bar span{display:block;height:100%;background:#0f172a;border-radius:999px}
.small{font-size:12px;color:var(--muted)}
.stat-row{display:flex;justify-content:space-between;gap:16px;margin:8px 0}
@media (max-width: 1000px){
  .grid.cards{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 760px){
  .sidebar{width:78px;padding:16px 10px}
  .brand div:last-child{display:none}
  .nav-item{font-size:0;text-align:center;padding:12px 4px}
  .nav-item::first-letter{font-size:20px}
  .main{margin-left:78px;width:calc(100% - 78px);padding:14px}
  .topbar{align-items:flex-start;flex-direction:column}
  .top-actions{width:100%;flex-wrap:wrap}
  #globalSearch{flex:1;min-width:160px}
  .grid.cards{grid-template-columns:1fr}
  table{display:block;overflow-x:auto}
  .form-grid{grid-template-columns:1fr}
  .form-grid .full{grid-column:auto}
}

.danger{border:1px solid #fecaca;background:#fff;color:#b91c1c;padding:10px 14px;border-radius:10px;cursor:pointer}

.login-screen{
  position:fixed;inset:0;background:#0f172a;display:grid;place-items:center;padding:20px;z-index:9999
}
.login-screen.hidden{display:none!important}
.login-card{
  width:min(420px,94vw);background:white;border-radius:18px;padding:26px;
  box-shadow:0 20px 60px rgba(0,0,0,.25)
}
.login-brand{display:flex;gap:12px;align-items:center;margin-bottom:22px}
.login-brand .logo{background:#0f172a;color:#fff}
.login-card h1{margin:0;font-size:20px}
.login-card h2{margin:0 0 8px}
.login-card p{margin:3px 0}
.login-card form{display:grid;gap:12px;margin-top:18px}
.login-card label{display:grid;gap:6px;font-size:13px;color:#475569}
.login-btn{width:100%}
.login-error{color:#b91c1c;font-size:13px;margin-top:10px;min-height:18px}
.user-role{font-size:11px;color:#64748b}


/* v22: fullscreen bulk class editor */
.modal-card.bulk-fullscreen-modal{
  width:96vw;
  max-width:none;
  height:94vh;
  max-height:94vh;
  padding:18px 20px;
  display:flex;
  flex-direction:column;
}

.bulk-fullscreen-modal #modalBody{
  flex:1;
  min-height:0;
  overflow:auto;
}

.bulk-fullscreen-modal table{
  table-layout:fixed;
  min-width:1180px;
}

.bulk-fullscreen-modal th,
.bulk-fullscreen-modal td{
  padding:8px 8px;
  font-size:12px;
  vertical-align:middle;
}

.bulk-fullscreen-modal th:nth-child(1),
.bulk-fullscreen-modal td:nth-child(1){width:48px}

.bulk-fullscreen-modal th:nth-child(2),
.bulk-fullscreen-modal td:nth-child(2){width:160px}

.bulk-fullscreen-modal th:nth-child(3),
.bulk-fullscreen-modal td:nth-child(3){width:160px}

.bulk-fullscreen-modal th:nth-child(4),
.bulk-fullscreen-modal td:nth-child(4){width:125px}

.bulk-fullscreen-modal th:nth-child(5),
.bulk-fullscreen-modal td:nth-child(5){width:120px}

.bulk-fullscreen-modal th:nth-child(6),
.bulk-fullscreen-modal td:nth-child(6){width:120px}

.bulk-fullscreen-modal th:nth-child(7),
.bulk-fullscreen-modal td:nth-child(7){width:90px}

.bulk-fullscreen-modal th:nth-child(8),
.bulk-fullscreen-modal td:nth-child(8){width:100px}

.bulk-fullscreen-modal th:nth-child(9),
.bulk-fullscreen-modal td:nth-child(9){width:105px}

.bulk-fullscreen-modal select,
.bulk-fullscreen-modal input{
  min-height:36px;
  padding:7px 8px;
  font-size:12px;
}

.bulk-fullscreen-modal .form-actions{
  position:sticky;
  bottom:0;
  background:#fff;
  padding-top:10px;
  margin-top:10px;
  border-top:1px solid var(--line);
}

@media (min-width:1200px){
  .bulk-fullscreen-modal table{
    min-width:100%;
  }
}


/* v23: prevent accidental browser back/forward swipe in forms */
html, body{
  max-width:100%;
  overflow-x:hidden;
  overscroll-behavior-x:none;
}

.modal{
  overflow-x:hidden;
  overscroll-behavior-x:none;
  touch-action:pan-y;
}

.modal-card{
  overflow-x:hidden;
  overscroll-behavior-x:none;
}

.modal-card input,
.modal-card select,
.modal-card textarea,
.modal-card button{
  touch-action:manipulation;
}

.horizontal-scroll-area{
  overflow-x:auto !important;
  overscroll-behavior-x:contain;
  touch-action:pan-x pan-y;
  -webkit-overflow-scrolling:touch;
}

/* Keep normal tutor/student forms locked horizontally */
.modal-card:not(.bulk-fullscreen-modal) #modalBody{
  overflow-x:hidden;
  max-width:100%;
}


/* v24: form modal navigation guard */
.modal-card::after{
  content:"";
  pointer-events:none;
}