:root{
  --navy:#0b3158;
  --navy-dark:#061f39;
  --gold:#c8a55d;
  --cream:#f7f3ea;
  --white:#fff;
  --text:#253446;
  --muted:#6f7b88;
  --line:#e6e1d7;
  --success:#1f8b4c;
  --danger:#b33b3b;
  --shadow:0 16px 40px rgba(11,49,88,.10);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f5f7fa;color:var(--text)}
button,input,select,textarea{font:inherit}
.app-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.sidebar{background:linear-gradient(180deg,var(--navy-dark),var(--navy));color:#fff;padding:24px 18px;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:12px;align-items:center;padding:0 8px 24px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:20px}
.brand-mark{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--gold);color:var(--navy-dark);font-size:28px;font-weight:800}
.brand strong{display:block}
.brand span{display:block;font-size:12px;color:rgba(255,255,255,.65);margin-top:2px}
nav{display:grid;gap:7px}
.nav-item{width:100%;text-align:left;border:0;background:transparent;color:rgba(255,255,255,.76);padding:11px 12px;border-radius:10px;cursor:pointer;font-weight:650}
.nav-item:hover,.nav-item.active{background:rgba(255,255,255,.12);color:#fff}
.main{padding:28px 32px 60px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}
.topbar h1{margin:0;color:var(--navy);font-size:32px}
.topbar p{margin:4px 0 0;color:var(--muted)}
.top-actions{display:flex;gap:10px}
.btn{border:0;border-radius:10px;padding:11px 16px;font-weight:750;cursor:pointer}
.btn.primary{background:var(--navy);color:#fff}
.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--line)}
.btn.gold{background:var(--gold);color:var(--navy-dark)}
.btn.danger{background:#fff0f0;color:var(--danger);border:1px solid #f3caca}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 6px 18px rgba(11,49,88,.05)}
.stat-label{font-size:13px;color:var(--muted);font-weight:700}
.stat-value{font-size:31px;color:var(--navy);font-weight:850;margin-top:6px}
.grid-2{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 6px 18px rgba(11,49,88,.05)}
.panel h2{margin:0 0 14px;color:var(--navy);font-size:20px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
td{font-size:14px}
.badge{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800}
.badge.paid,.badge.active,.badge.present{background:#e9f8ef;color:var(--success)}
.badge.unpaid,.badge.absent{background:#fff0f0;color:var(--danger)}
.badge.partial,.badge.pending,.badge.rescheduled{background:#fff7df;color:#8a6500}
.toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}
.search{min-width:240px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.field{display:grid;gap:6px}
.field label{font-size:13px;font-weight:750;color:var(--navy)}
.field input,.field select,.field textarea{padding:10px 11px;border:1px solid var(--line);border-radius:10px;background:#fff}
.field.full{grid-column:1/-1}
.modal{position:fixed;inset:0;background:rgba(4,18,32,.65);display:grid;place-items:center;padding:20px;z-index:100}
.modal.hidden{display:none}
.modal-card{position:relative;background:#fff;width:min(760px,95vw);max-height:90vh;overflow:auto;border-radius:20px;padding:24px;box-shadow:0 30px 90px rgba(0,0,0,.25)}
.modal-close{position:absolute;right:16px;top:12px;border:0;background:#f1f3f5;border-radius:50%;width:36px;height:36px;font-size:22px;cursor:pointer}
.invoice-box{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff}
.invoice-head{display:flex;justify-content:space-between;gap:20px;margin-bottom:20px}
.invoice-head h2{margin:0;color:var(--navy)}
.invoice-total{font-size:28px;font-weight:900;color:var(--navy)}
.muted{color:var(--muted)}
.list{display:grid;gap:10px}
.list-item{display:flex;justify-content:space-between;gap:12px;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fcfbf8}
.empty{padding:28px;text-align:center;color:var(--muted)}
@media(max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}.app-shell{grid-template-columns:210px 1fr}}
@media(max-width:760px){.app-shell{grid-template-columns:1fr}.sidebar{position:static;height:auto}.main{padding:20px}.cards{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}}
@media print{
  body{background:#fff}
  .sidebar,.topbar,.no-print{display:none!important}
  .app-shell{display:block}
  .main{padding:0}
  .modal{position:static;background:#fff;padding:0}
  .modal-card{box-shadow:none;width:100%;max-height:none;padding:0}
  .modal-close{display:none}
}


/* ===== Premium invoice v1.1 ===== */
.invoice-sheet{
  background:#fff;
  border-radius:18px;
  overflow:hidden;
  border:1px solid #e5e0d7;
  color:#21344b;
  box-shadow:0 16px 50px rgba(8,45,80,.08);
}
.invoice-hero{
  background:#082a4a;
  color:#fff;
  padding:34px 38px 26px;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:24px;
  align-items:center;
  border-bottom:6px solid #cfae61;
}
.invoice-logo-wrap{
  background:#f7f2e7;
  border-radius:18px;
  min-height:120px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
}
.invoice-logo-text{
  font-family:Georgia,serif;
  color:#0b3158;
  text-align:center;
}
.invoice-logo-text strong{
  display:block;
  font-size:26px;
  letter-spacing:.02em;
}
.invoice-logo-text span{
  display:block;
  color:#b78d38;
  margin-top:6px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.08em;
}
.invoice-title{
  text-align:right;
}
.invoice-title h1{
  margin:0;
  font-size:38px;
  letter-spacing:.02em;
}
.invoice-title .academy{
  color:#d6ae54;
  font-weight:900;
  margin-top:8px;
}
.invoice-title .tagline{
  margin-top:4px;
  opacity:.92;
}
.invoice-body{
  padding:32px 38px 30px;
}
.invoice-meta{
  background:#f5f0e6;
  border-radius:18px;
  padding:20px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  margin-bottom:24px;
}
.meta-block span,
.invoice-box-label{
  display:block;
  font-size:11px;
  font-weight:850;
  color:#66758a;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.meta-block strong{
  display:block;
  margin-top:8px;
  color:#0b3158;
  font-size:15px;
}
.invoice-status{
  display:inline-flex;
  margin-top:6px;
  min-width:82px;
  justify-content:center;
  padding:8px 14px;
  border-radius:999px;
  background:#d3aa53;
  color:#092a49;
  font-weight:900;
}
.invoice-cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
  margin-bottom:26px;
}
.invoice-info-card{
  border:1px solid #e7dfd0;
  border-radius:16px;
  padding:18px 20px;
  min-height:145px;
}
.invoice-info-card h3{
  color:#c89f4f;
  font-size:13px;
  text-transform:uppercase;
  margin:0 0 14px;
  letter-spacing:.03em;
}
.invoice-info-card .big{
  font-size:22px;
  font-weight:900;
  color:#0b3158;
  margin-bottom:6px;
}
.invoice-info-card p{
  margin:5px 0;
  color:#5f6e81;
}
.invoice-items{
  border:1px solid #e5dfd3;
  border-radius:14px;
  overflow:hidden;
  margin-bottom:10px;
}
.invoice-items table{
  width:100%;
  border-collapse:collapse;
}
.invoice-items thead{
  background:#0b3b68;
  color:#fff;
}
.invoice-items th{
  color:#fff;
  font-size:12px;
  padding:14px 16px;
  text-transform:uppercase;
}
.invoice-items td{
  padding:15px 16px;
  border-bottom:1px solid #e7e1d7;
}
.invoice-items tr:last-child td{
  border-bottom:0;
}
.invoice-note{
  color:#6f7c8d;
  font-size:12px;
  margin:10px 0 18px 18px;
}
.invoice-bottom{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:22px;
  align-items:stretch;
}
.payment-card{
  border:1px solid #e7dfd0;
  border-radius:16px;
  padding:18px 20px;
}
.payment-card h3{
  margin:0 0 14px;
  color:#c89f4f;
  font-size:13px;
  text-transform:uppercase;
}
.payment-card p{
  margin:7px 0;
  color:#526176;
}
.total-card{
  background:#f5f0e6;
  border-radius:16px;
  padding:18px 20px;
}
.total-row{
  display:flex;
  justify-content:space-between;
  gap:20px;
  margin:8px 0;
}
.total-row.grand{
  border-top:2px solid #c9a252;
  padding-top:12px;
  margin-top:12px;
  color:#0b3158;
  font-size:18px;
  font-weight:900;
}
.total-row.grand strong{
  font-size:30px;
}
.invoice-footer{
  border-top:1px solid #e9e2d7;
  margin-top:34px;
  padding-top:16px;
  display:flex;
  justify-content:space-between;
  gap:20px;
  align-items:flex-end;
}
.invoice-footer strong{
  color:#0b3158;
}
.invoice-footer .thanks{
  text-align:right;
  color:#c89f4f;
  font-weight:900;
}
@media(max-width:760px){
  .invoice-hero,.invoice-cols,.invoice-bottom{grid-template-columns:1fr}
  .invoice-title{text-align:left}
  .invoice-meta{grid-template-columns:1fr 1fr}
}
@media print{
  .invoice-sheet{box-shadow:none;border:0;border-radius:0}
  .invoice-body{padding:24px 28px}
  .invoice-hero{padding:28px}
}

/* v1.3 controls */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:end;margin:0 0 18px}
.mini-field{display:grid;gap:5px;min-width:145px}
.mini-field span{font-size:11px;text-transform:uppercase;color:var(--muted);font-weight:800;letter-spacing:.04em}
.mini-field input,.mini-field select{padding:9px 10px;border:1px solid var(--line);border-radius:9px;background:#fff;min-height:38px}
.row-actions{display:flex;gap:6px;align-items:center}
.tiny-btn{border:1px solid var(--line);background:#fff;padding:6px 8px;border-radius:8px;font-size:11px;font-weight:800;cursor:pointer}
.tiny-btn.good{color:var(--success);border-color:#bfe3cc}
.tiny-btn.warn{color:#8a6500;border-color:#efd894}
.tiny-btn.danger{color:var(--danger);border-color:#efc2c2}
.badge.on-hold{background:#fff7df;color:#8a6500}
.badge.left,.badge.expense{background:#fff0f0;color:var(--danger)}
.badge.income{background:#e9f8ef;color:var(--success)}
.badge.paused{background:#fff7df;color:#8a6500}
.badge.ended{background:#eef0f3;color:#647180}
.day-grid,.check-grid,.student-checks{display:flex;flex-wrap:wrap;gap:10px}
.day-grid label,.check-grid label,.student-checks label{border:1px solid var(--line);border-radius:9px;padding:8px 10px;background:#fcfbf8}
.student-checks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));max-height:280px;overflow:auto}
.report-controls{margin-bottom:18px}
#reportOutput{display:grid;gap:18px}
@media(max-width:760px){.student-checks{grid-template-columns:1fr}.row-actions{flex-wrap:wrap}}


/* ===== v1.4 invoice polish ===== */
.paypal-pay-box{
  display:grid;
  gap:14px;
  margin-top:12px;
}
.paypal-pay-btn{
  width:fit-content;
}
.paypal-qr-wrap{
  display:flex;
  gap:14px;
  align-items:center;
  padding:12px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
}
.paypal-qr{
  width:92px;
  height:92px;
  object-fit:contain;
  border-radius:10px;
  border:1px solid var(--line);
  background:#fff;
  padding:5px;
}
.paypal-qr-wrap strong{
  color:var(--navy);
  display:block;
  margin-bottom:4px;
}
.invoice-status-paid{
  background:#dff5e8 !important;
  color:#176b39 !important;
}
.invoice-status-pending{
  background:#fff2cc !important;
  color:#8a6500 !important;
}
.invoice-status-unpaid{
  background:#ffe4e4 !important;
  color:#a33b3b !important;
}
@media print{
  .paypal-pay-box .paypal-pay-btn{display:none !important}
  .paypal-qr-wrap{break-inside:avoid}
}


/* ===== Version 1.5: editing, history and access ===== */
.current-user-badge{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 12px;
  border-radius:10px;
  background:#f7f3ea;
  color:#0b3158;
  border:1px solid #e7dfd0;
  font-size:12px;
  font-weight:850;
}
.badge.admin{background:#e8eef8;color:#0b3158}
.badge.manager{background:#fff2cc;color:#8a6500}
.badge.viewer{background:#eef0f3;color:#5e6b78}
.badge.edited,.badge.status-changed,.badge.user-edited{background:#e8eef8;color:#0b3158}
.badge.deleted,.badge.user-removed{background:#ffe4e4;color:#a33b3b}
.badge.user-added{background:#e9f8ef;color:#1f8b4c}
.access-warning{
  padding:15px 18px;
  border:1px solid #efd894;
  background:#fff9e8;
  color:#705500;
  border-radius:14px;
  margin-bottom:18px;
}
.access-steps{
  margin-top:24px;
  padding:18px 20px;
  border-radius:15px;
  background:#f8fafc;
  border:1px solid var(--line);
}
.access-steps h3{margin-top:0}
.access-steps li{margin:8px 0}


/* ===== v1.5.1 Academy logo ===== */
.brand-logo-wrap{
  width:64px;
  height:64px;
  border-radius:16px;
  overflow:hidden;
  background:#f7f3ea;
  border:1px solid rgba(255,255,255,.18);
  display:grid;
  place-items:center;
  flex:0 0 64px;
}
.brand-logo{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.brand{
  align-items:center;
}
.brand strong{
  line-height:1.15;
}


/* ===== Version 1.5.2 top bar polish ===== */
.current-user-card{
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:7px 12px 7px 8px;
  border-radius:12px;
  background:#f7f3ea;
  border:1px solid #e4d9c1;
  color:#0b3158;
}
.user-avatar{
  width:34px;
  height:34px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:#0b3158;
  color:#fff;
  font-size:12px;
  font-weight:900;
  letter-spacing:.04em;
}
.user-copy{
  display:grid;
  line-height:1.05;
}
.user-copy strong{
  font-size:13px;
  color:#0b3158;
}
.user-copy span{
  margin-top:4px;
  font-size:11px;
  color:#6f7b88;
}


/* ===== Version 1.6 Backup & Activity Center ===== */
.sidebar-version{
  margin-top:auto;
  padding:14px 18px;
  color:rgba(255,255,255,.58);
  font-size:11px;
  font-weight:700;
}
.settings-actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:18px 0;
}
.safety-note{
  border:1px solid #efd894;
  background:#fff9e8;
  color:#705500;
  border-radius:12px;
  padding:13px 14px;
  line-height:1.5;
}
.activity-list{
  display:grid;
  gap:0;
}
.activity-item{
  display:grid;
  grid-template-columns:18px 1fr;
  gap:12px;
  padding:16px 4px;
  border-bottom:1px solid var(--line);
}
.activity-item:last-child{border-bottom:0}
.activity-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  background:#c9a252;
  margin-top:6px;
}
.activity-main{
  min-width:0;
}
.activity-head{
  display:flex;
  justify-content:space-between;
  gap:15px;
  margin-bottom:5px;
}
.activity-head strong{color:#0b3158}
.activity-head span{color:var(--muted);font-size:12px;white-space:nowrap}
.activity-changes{
  margin-top:7px;
  color:#5f6e81;
  font-size:12px;
  display:grid;
  gap:4px;
  word-break:break-word;
}


/* ===== Version 2.0 — Supabase Authentication Test ===== */
.auth-locked{
  display:none !important;
}
.auth-screen{
  min-height:100vh;
  display:grid;
  place-items:center;
  padding:24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(202,163,82,.13), transparent 30%),
    linear-gradient(135deg,#062848 0%,#0a355d 100%);
}
.auth-screen.hidden{
  display:none;
}
.auth-card{
  width:min(430px,100%);
  background:#fff;
  border-radius:24px;
  padding:34px;
  box-shadow:0 24px 70px rgba(0,0,0,.28);
  border:1px solid rgba(202,163,82,.25);
}
.auth-logo{
  width:110px;
  height:70px;
  object-fit:contain;
  display:block;
  margin:0 auto 10px;
}
.auth-brand{
  text-align:center;
  color:#c59b43;
  font-weight:900;
  letter-spacing:.06em;
  font-size:13px;
  text-transform:uppercase;
}
.auth-card h1{
  text-align:center;
  margin:8px 0 6px;
  color:#082f55;
  font-size:32px;
}
.auth-subtitle{
  text-align:center;
  color:#6a788c;
  margin:0 0 24px;
}
.auth-form{
  display:grid;
  gap:15px;
}
.auth-form label{
  display:grid;
  gap:7px;
  font-weight:800;
  color:#1b3550;
  font-size:13px;
}
.auth-form input{
  width:100%;
  box-sizing:border-box;
  border:1px solid #d9dee7;
  border-radius:11px;
  padding:13px 14px;
  font:inherit;
  outline:none;
  background:#fff;
}
.auth-form input:focus{
  border-color:#0b65c8;
  box-shadow:0 0 0 3px rgba(11,101,200,.12);
}
.auth-submit{
  width:100%;
  justify-content:center;
  margin-top:3px;
}
.auth-submit:disabled{
  opacity:.65;
  cursor:wait;
}
.auth-message{
  min-height:20px;
  margin-top:14px;
  text-align:center;
  color:#65748a;
  font-size:13px;
}
.auth-message.error{
  color:#b42318;
  background:#fff2f0;
  border:1px solid #ffd1cc;
  border-radius:9px;
  padding:9px 10px;
}
.auth-security{
  border-top:1px solid #eceff4;
  margin-top:18px;
  padding-top:15px;
  text-align:center;
  color:#8490a0;
  font-size:11px;
}


/* ===== Version 2.1 Master Schedule ===== */
.schedule-slot-line{
  margin:3px 0;
  font-size:12px;
}
.schedule-slot-line span{
  color:var(--muted);
  margin-left:5px;
}
.schedule-modal-card{
  width:min(900px,94vw);
}
.schedule-builder{
  margin-top:18px;
  border-top:1px solid var(--line);
  padding-top:14px;
}
.slot-row{
  display:grid;
  grid-template-columns:1fr 1fr 1.8fr auto;
  gap:10px;
  margin:10px 0;
  align-items:center;
}
.slot-row select,.slot-row input{
  width:100%;
  box-sizing:border-box;
  border:1px solid #d9dee7;
  border-radius:10px;
  padding:11px 12px;
  font:inherit;
  background:white;
}
.modal-actions{
  display:flex;
  justify-content:flex-end;
  margin-top:18px;
}
@media(max-width:760px){
  .slot-row{grid-template-columns:1fr 1fr}
  .slot-zone{grid-column:1 / -1}
}


/* ===== Version 3.0.0 Cloud Foundation ===== */
.small-stat{font-size:18px !important;line-height:1.25}
.json-setting{
  max-width:330px;
  text-align:right;
  font-size:11px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  word-break:break-word;
}
textarea{
  min-height:90px;
  resize:vertical;
}


/* ===== v3.1.0 Master Schedule ===== */
.weekly-calendar{
  display:grid;
  grid-template-columns:repeat(7,minmax(155px,1fr));
  gap:10px;
  overflow-x:auto;
  padding-bottom:6px;
}
.calendar-day{
  min-width:155px;
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  background:#fff;
}
.calendar-day-head{
  padding:10px 12px;
  background:#f7f9fc;
  border-bottom:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:8px;
  font-size:12px;
}
.calendar-day-head strong{color:#0b3158}
.calendar-day-head span{color:var(--muted)}
.calendar-day-body{padding:8px;display:grid;gap:7px}
.calendar-lesson{
  padding:9px;
  border-radius:10px;
  background:#f8f5ed;
  border:1px solid #e7dcc3;
  display:grid;
  gap:2px;
}
.calendar-lesson strong{color:#0b3158;font-size:12px}
.calendar-lesson span{font-size:12px;font-weight:800}
.calendar-lesson small{color:var(--muted)}
.calendar-empty{font-size:11px;color:var(--muted);padding:8px}
.schedule-slot-line{margin:3px 0;font-size:12px}
.schedule-slot-line span{color:var(--muted);margin-left:5px}
.slot-row-v31,.availability-row-v31{
  display:grid;
  grid-template-columns:1.1fr 1fr 1.8fr auto;
  gap:8px;
  margin:8px 0;
  align-items:center;
}
.availability-row-v31{grid-template-columns:1.1fr 1fr 1fr 1.5fr auto}
.slot-row-v31 select,.slot-row-v31 input,
.availability-row-v31 select,.availability-row-v31 input{
  width:100%;box-sizing:border-box;border:1px solid var(--line);
  border-radius:9px;padding:9px 10px;background:#fff;font:inherit;
}
@media(max-width:900px){
  .weekly-calendar{grid-template-columns:repeat(7,155px)}
  .slot-row-v31,.availability-row-v31{grid-template-columns:1fr 1fr}
  .v31-zone,.v31-av-zone{grid-column:1/-1}
}