:root{
  --navy:#1E2A44;
  --navy-light:#2C3E63;
  --navy-pale:#EEF1F6;
  --gold:#C9A24B;
  --gold-dark:#8A6C2E;
  --gold-pale:#F6EFDD;
  --bg:#F3F4F0;
  --card:#FFFFFF;
  --ink:#1E2A44;
  --ink-soft:#5B6478;
  --ink-faint:#8A8F9C;
  --line:#E2E3DC;
  --danger:#B0555A;
  --danger-pale:#F7E9E9;
  --success:#3F7A57;
  --success-pale:#E7F1EA;
  --radius:10px;
  --shadow:0 1px 2px rgba(30,42,68,0.06), 0 1px 8px rgba(30,42,68,0.05);
}
*{box-sizing:border-box;}
body{
  margin:0;
  font-family:'IBM Plex Sans', sans-serif;
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.serif{font-family:'Fraunces', serif;}
.mono{font-family:'IBM Plex Mono', monospace;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:#D6D7CE;border-radius:4px;}

#loading-screen{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  color:var(--ink-soft);font-size:14px;
}
#auth-screen{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:var(--navy);
  padding:24px;
}
.auth-card{
  background:var(--card);
  border-radius:14px;
  padding:40px 36px;
  width:100%;
  max-width:400px;
  box-shadow:0 20px 60px rgba(0,0,0,0.35);
}
.auth-brand{
  display:flex;align-items:center;gap:10px;margin-bottom:28px;
}
.auth-brand .mark{
  width:34px;height:34px;border-radius:8px;background:var(--navy);
  display:flex;align-items:center;justify-content:center;
  color:var(--gold);font-family:'Fraunces',serif;font-weight:600;font-size:17px;
}
.auth-brand span{font-family:'Fraunces',serif;font-size:19px;font-weight:500;color:var(--navy);}
.auth-card h1{font-size:22px;font-weight:500;margin:0 0 6px;color:var(--navy);}
.auth-card p.sub{color:var(--ink-soft);font-size:13.5px;margin:0 0 24px;line-height:1.5;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:12.5px;color:var(--ink-soft);margin-bottom:6px;font-weight:500;}
.field input, .field select, .field textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;background:#fff;color:var(--ink);
}
.field input:disabled, .field select:disabled{background:#F4F4F1;color:var(--ink-faint);}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none;border-color:var(--gold);box-shadow:0 0 0 3px var(--gold-pale);
}
.btn{
  border:1px solid var(--line);background:#fff;color:var(--ink);
  padding:10px 16px;border-radius:8px;font-size:13.5px;font-weight:500;
  transition:background .15s;
}
.btn:hover{background:var(--navy-pale);}
.btn-primary{
  background:var(--navy);color:#fff;border-color:var(--navy);width:100%;
  padding:11px 16px;font-size:14px;
}
.btn-primary:hover{background:var(--navy-light);}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#40310F;}
.btn-gold:hover{background:var(--gold-dark);color:#fff;}
.btn-danger{color:var(--danger);border-color:var(--danger);background:#fff;}
.btn-danger:hover{background:var(--danger-pale);}
.btn-sm{padding:6px 11px;font-size:12.5px;}
.err-msg{color:var(--danger);font-size:13px;margin:-6px 0 14px;}
.auth-alt{margin-top:16px;text-align:center;font-size:12.5px;}
.auth-alt a{color:var(--ink-faint);cursor:pointer;text-decoration:underline;}

#app-shell{display:none;min-height:100vh;}
.shell-inner{display:flex;min-height:100vh;}
.sidebar{
  width:222px;flex-shrink:0;background:var(--navy);color:#fff;
  display:flex;flex-direction:column;padding:22px 14px;
}
.sidebar .brand{display:flex;align-items:center;gap:10px;padding:0 8px 24px;border-bottom:1px solid rgba(255,255,255,0.1);margin-bottom:18px;}
.sidebar .brand .mark{width:30px;height:30px;border-radius:7px;background:var(--gold);color:var(--navy);display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-weight:600;font-size:15px;flex-shrink:0;}
.sidebar .brand .name{font-family:'Fraunces',serif;font-size:15.5px;font-weight:500;line-height:1.25;}
.nav-item{
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  padding:10px 12px;border-radius:8px;color:rgba(255,255,255,0.72);
  font-size:13.5px;font-weight:500;margin-bottom:2px;
}
.nav-item:hover{background:rgba(255,255,255,0.06);color:#fff;}
.nav-item.active{background:var(--navy-light);color:#fff;}
.nav-item .badge{
  background:var(--gold);color:var(--navy);font-size:11px;font-weight:600;
  padding:1px 7px;border-radius:20px;font-family:'IBM Plex Mono',monospace;
}
.sidebar-footer{margin-top:auto;padding:12px 8px 0;border-top:1px solid rgba(255,255,255,0.1);}
.sidebar-footer .who{font-size:12.5px;color:#fff;margin-bottom:2px;font-weight:500;}
.sidebar-footer .role-tag{font-size:11px;color:var(--gold);margin-bottom:8px;}
.sidebar-footer button{
  background:none;border:none;color:rgba(255,255,255,0.5);font-size:12px;padding:6px 4px;
}
.sidebar-footer button:hover{color:#fff;}

.main{flex:1;min-width:0;display:flex;flex-direction:column;}
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 28px;border-bottom:1px solid var(--line);background:var(--card);
  gap:16px;flex-wrap:wrap;
}
.topbar h1{font-size:19px;font-weight:500;margin:0;color:var(--navy);}
.topbar-title{display:flex;align-items:center;gap:10px;}
.mobile-menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:8px;width:36px;height:34px;font-size:18px;line-height:1;}
.topbar .actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
.search-box{position:relative;}
.search-box input{
  padding:8px 12px 8px 32px;border:1px solid var(--line);border-radius:8px;
  font-size:13.5px;width:220px;background:#fff;
}
.search-box::before{
  content:'';position:absolute;left:10px;top:50%;transform:translateY(-50%);
  width:14px;height:14px;border:1.5px solid var(--ink-faint);border-radius:50%;
}
.content{flex:1;padding:26px 28px;overflow-y:auto;}

.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:24px;}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);}
.stat-card .label{font-size:12px;color:var(--ink-soft);margin-bottom:6px;font-weight:500;}
.stat-card .value{font-family:'Fraunces',serif;font-size:26px;font-weight:500;color:var(--navy);}
.stat-card .sub{font-size:11.5px;color:var(--ink-faint);margin-top:4px;}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);margin-bottom:20px;}
.panel h2{font-size:15px;font-weight:500;margin:0 0 16px;color:var(--navy);}
.funnel-row{display:flex;align-items:center;gap:12px;margin-bottom:10px;font-size:13px;}
.funnel-label{width:150px;flex-shrink:0;color:var(--ink-soft);}
.funnel-track{flex:1;height:20px;background:var(--navy-pale);border-radius:4px;overflow:hidden;}
.funnel-fill{height:100%;border-radius:4px;}
.funnel-count{width:36px;text-align:right;font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--ink);}
.callout{
  display:flex;align-items:center;justify-content:space-between;
  background:var(--gold-pale);border:1px solid #EAD8AC;border-radius:var(--radius);
  padding:14px 18px;margin-bottom:20px;flex-wrap:wrap;gap:8px;
}
.callout span{font-size:13.5px;color:#5C4A1E;}
.callout strong{color:var(--gold-dark);}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;}
.seg button{border:none;background:#fff;padding:8px 16px;font-size:13px;color:var(--ink-soft);border-right:1px solid var(--line);font-weight:500;}
.seg button:last-child{border-right:none;}
.seg button.active{background:var(--navy);color:#fff;}
.seg button:hover:not(.active){background:var(--navy-pale);}

.filters-row{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap;align-items:center;}
.filters-row select, .filters-row input{
  padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:13px;background:#fff;
}
table{width:100%;border-collapse:collapse;font-size:13px;}
th{
  text-align:left;padding:9px 12px;color:var(--ink-soft);font-weight:500;font-size:11.5px;
  text-transform:uppercase;letter-spacing:.03em;border-bottom:1px solid var(--line);
}
td{padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:middle;}
tbody tr{cursor:pointer;}
tbody tr:hover{background:var(--navy-pale);}
.empty-state{padding:50px 20px;text-align:center;color:var(--ink-faint);}
.empty-state .big{font-size:32px;margin-bottom:10px;}

.pill{
  display:inline-block;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:600;
  white-space:nowrap;
}
.role-pill{display:inline-block;padding:2px 9px;border-radius:20px;font-size:11px;font-weight:600;}
.role-admin{background:#EEEDFE;color:#3C3489;}
.role-sales{background:#E1F5EE;color:#085041;}
.role-accountant{background:#FAEEDA;color:#854F0B;}
.remaining-pos{color:var(--danger);font-weight:500;}
.remaining-zero{color:var(--success);font-weight:500;}

.overlay{
  position:fixed;inset:0;background:rgba(30,42,68,0.35);display:none;z-index:40;
}
.overlay.show{display:block;}
.detail-panel{
  position:fixed;top:0;right:0;height:100vh;width:440px;max-width:92vw;
  background:var(--bg);box-shadow:-8px 0 30px rgba(0,0,0,0.15);
  transform:translateX(100%);transition:transform .22s ease;z-index:50;
  display:flex;flex-direction:column;
}
.detail-panel.show{transform:translateX(0);}
.detail-head{
  padding:18px 22px;border-bottom:1px solid var(--line);background:var(--card);
  display:flex;align-items:flex-start;justify-content:space-between;gap:10px;
}
.detail-head h2{font-size:18px;margin:0 0 4px;color:var(--navy);}
.detail-head .close-btn{
  background:none;border:none;font-size:20px;color:var(--ink-faint);line-height:1;padding:4px;
}
.detail-body{flex:1;overflow-y:auto;padding:18px 22px;}
.detail-body .panel{margin-bottom:14px;}
.kv-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed var(--line);font-size:13px;}
.kv-row:last-child{border-bottom:none;}
.kv-row .k{color:var(--ink-soft);}
.kv-row .v{font-weight:500;text-align:right;}
.timeline{border-left:2px dashed var(--line);margin-left:6px;padding-left:16px;}
.timeline-item{position:relative;padding-bottom:16px;}
.timeline-item::before{
  content:'';position:absolute;left:-21px;top:3px;width:8px;height:8px;border-radius:50%;
  background:var(--gold);border:2px solid var(--card);
}
.timeline-item .date{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--ink-faint);margin-bottom:2px;}
.timeline-item .type{display:inline-block;font-size:11px;font-weight:600;color:var(--navy);margin-right:6px;}
.timeline-item .by{font-size:11px;color:var(--ink-faint);}
.timeline-item .content{font-size:13px;color:var(--ink);line-height:1.5;}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.form-grid .full{grid-column:1/-1;}
.reminder-actions{display:flex;gap:6px;flex-wrap:wrap;}

.modal-overlay{
  position:fixed;inset:0;background:rgba(30,42,68,0.4);display:none;
  align-items:center;justify-content:center;z-index:60;padding:20px;
}
.modal-overlay.show{display:flex;}
.modal{
  background:var(--card);border-radius:14px;padding:26px 26px 22px;width:100%;max-width:460px;
  max-height:88vh;overflow-y:auto;box-shadow:0 24px 60px rgba(0,0,0,0.3);
}
.modal h2{font-size:17px;margin:0 0 18px;color:var(--navy);}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:18px;}
.small-note{font-size:12px;color:var(--ink-faint);margin-top:6px;line-height:1.5;}
.staff-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);}
.staff-row:last-child{border-bottom:none;}
.staff-row .info{display:flex;align-items:center;gap:8px;}

.dashboard-time-filter{padding:14px 18px;margin-bottom:16px;background:linear-gradient(135deg,#fff 0%,var(--navy-pale) 100%);}
.dashboard-range-count{margin-left:auto;font-size:12px;font-weight:600;color:var(--navy);background:#fff;border:1px solid var(--line);border-radius:20px;padding:5px 10px;}
.class-summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:14px;}
.class-summary{font:inherit;text-align:left;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;color:var(--ink-soft);box-shadow:0 2px 8px rgba(30,42,68,.04);}
.class-summary span{font-size:12.5px;font-weight:500;}
.class-summary strong{font-size:23px;color:var(--navy);}
.class-summary.active strong{color:var(--success);}
.class-summary.upcoming strong{color:var(--gold-dark);}
.class-summary.ended strong{color:var(--ink-faint);}
.class-summary.selected{border-color:var(--gold);box-shadow:0 0 0 2px rgba(212,174,82,.2);}
.class-toolbar{justify-content:space-between;background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:18px;}
.class-program{margin-bottom:22px;}
.class-program-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:9px;padding:0 2px;}
.class-program-head > span:last-child{font-size:12px;color:var(--ink-faint);}
.class-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
.class-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:0 2px 10px rgba(30,42,68,.04);min-width:0;}
.class-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:13px;}
.class-card-head h3{font-size:15px;color:var(--navy);margin:0 0 6px;}
.class-card-actions{display:flex;gap:5px;flex-shrink:0;}
.class-status{display:inline-block;font-size:11px;font-weight:650;border-radius:20px;padding:3px 9px;}
.class-status.active{background:#E1F5EE;color:#085041;}
.class-status.upcoming{background:#FAEEDA;color:#854F0B;}
.class-status.ended{background:#F1EFE8;color:#5F5E5A;}
.class-date-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--navy-pale);border-radius:8px;padding:9px 10px;margin-bottom:10px;font-size:12.5px;color:var(--navy);}
.class-date-line small{margin-left:auto;color:var(--ink-faint);}
.class-meta{display:flex;gap:8px 14px;flex-wrap:wrap;font-size:12px;color:var(--ink-soft);line-height:1.5;}
.class-meter,.class-progress{height:5px;background:#EEF0F4;border-radius:8px;overflow:hidden;margin-top:9px;}
.class-meter>div{height:100%;background:var(--navy);border-radius:8px;}
.class-progress-label{display:flex;justify-content:space-between;margin-top:12px;font-size:11.5px;color:var(--ink-faint);}
.class-progress-label strong{color:var(--ink-soft);}
.class-progress>div{height:100%;background:var(--gold);border-radius:8px;}
.class-students{border-top:1px dashed var(--line);margin-top:13px;padding-top:10px;font-size:12px;}
.class-students summary{cursor:pointer;color:var(--navy);font-weight:600;margin-bottom:6px;}
.class-students>div{display:flex;justify-content:space-between;gap:10px;padding:5px 0;border-top:1px dashed var(--line);}
.class-students a{color:var(--navy);text-decoration:underline;cursor:pointer;}
.class-students span{color:var(--ink-faint);text-align:right;}
.class-empty{font-size:12px;color:var(--ink-faint);border-top:1px dashed var(--line);padding-top:10px;margin:13px 0 0;}

@media (max-width:760px){
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:30;transform:translateX(-100%);transition:transform .2s;}
  .sidebar.show{transform:translateX(0);}
  .content{padding:18px 14px;}
  .topbar{padding:12px 16px;}
  .mobile-menu-btn{display:inline-flex;align-items:center;justify-content:center;}
  .search-box input{width:130px;}
  .detail-panel{width:100vw;max-width:100vw;}
  .content > .panel{overflow-x:auto !important;}
  .content > .panel table{min-width:760px;}
  .class-summary-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .class-card-grid{grid-template-columns:1fr;}
  .dashboard-range-count{margin-left:0;}
}