*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:#f0f2f5;color:#1a1a1a;min-height:100vh}

/* ── Screens ── */
.screen{display:none}
.screen.active{display:flex}

/* ── Login ── */
#login-screen{min-height:100vh;align-items:center;justify-content:center;padding:24px}
.login-box{background:#fff;border-radius:16px;border:0.5px solid #e0e0e0;padding:36px 32px;width:100%;max-width:400px}
.school-logo{width:56px;height:56px;background:#E6F1FB;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.school-logo svg{width:28px;height:28px}
.login-title{font-size:22px;font-weight:500;margin-bottom:6px;color:#1a1a1a}
.login-sub{font-size:14px;color:#888;margin-bottom:28px}
.field-label{font-size:12px;color:#888;margin-bottom:6px;letter-spacing:0.4px;text-transform:uppercase}
.inp{width:100%;padding:12px 14px;font-size:16px;border:1px solid #ddd;border-radius:8px;outline:none;transition:border-color 0.2s;color:#1a1a1a;background:#fff;margin-bottom:4px}
.inp:focus{border-color:#378ADD}
.inp-group{margin-bottom:16px}
.btn-primary{width:100%;padding:13px;font-size:15px;font-weight:500;color:#fff;background:#378ADD;border:none;border-radius:8px;cursor:pointer;transition:background 0.2s;margin-top:4px}
.btn-primary:hover{background:#185FA5}
.btn-primary:disabled{background:#aaa;cursor:not-allowed}
.btn-ghost{width:100%;padding:11px;font-size:14px;font-weight:500;color:#378ADD;background:transparent;border:1px solid #ddd;border-radius:8px;cursor:pointer;margin-top:8px;display:none;transition:all 0.2s}
.btn-ghost:hover{border-color:#378ADD;background:#f0f7ff}
.err-msg{font-size:13px;color:#E24B4A;margin:8px 0;display:none}
.countdown{font-size:12px;color:#aaa;text-align:center;margin-top:10px;min-height:18px}
.step{display:none}
.step.active{display:block}
.back-link{font-size:13px;color:#888;cursor:pointer;margin-bottom:20px;display:flex;align-items:center;gap:4px}

/* ── Dashboard ── */
#dash-screen{min-height:100vh;flex-direction:column}
.topbar{background:#fff;border-bottom:0.5px solid #e0e0e0;padding:0 20px;height:56px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:10}
.topbar-title{font-size:16px;font-weight:500;color:#1a1a1a}
.logout-btn{font-size:13px;color:#888;background:none;border:none;cursor:pointer;padding:6px 10px;border-radius:6px;transition:background 0.2s}
.logout-btn:hover{background:#f5f5f5}
.dash-body{display:flex;flex:1;min-height:calc(100vh - 56px)}

/* ── Sidebar ── */
.sidebar{width:220px;background:#fff;border-right:0.5px solid #e0e0e0;padding:16px 0;flex-shrink:0}
.sidebar-label{font-size:11px;color:#aaa;letter-spacing:0.5px;padding:0 16px;margin-bottom:8px;text-transform:uppercase}
.child-item{display:flex;align-items:center;gap:10px;padding:10px 16px;cursor:pointer;transition:background 0.15s;border-left:3px solid transparent}
.child-item:hover{background:#f8f8f8}
.child-item.active{background:#f0f7ff;border-left-color:#378ADD}
.child-avatar{width:36px;height:36px;border-radius:50%;background:#E6F1FB;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:500;color:#0C447C;overflow:hidden}
.child-avatar img{width:100%;height:100%;object-fit:cover;border-radius:50%}
.child-info{min-width:0}
.child-name{font-size:14px;font-weight:500;color:#1a1a1a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.child-class{font-size:12px;color:#888}

/* ── Main content ── */
.main-content{flex:1;padding:24px;overflow-y:auto}
.tab-bar{display:flex;gap:4px;margin-bottom:24px;background:#f0f2f5;border-radius:8px;padding:4px;max-width:400px}
.tab{flex:1;padding:8px;text-align:center;font-size:14px;font-weight:500;color:#888;border-radius:6px;cursor:pointer;transition:all 0.15s;border:none;background:transparent}
.tab.active{background:#fff;color:#1a1a1a;border:0.5px solid #e0e0e0}
.tab-content{display:none}
.tab-content.active{display:block}

/* ── Profile card ── */
.profile-card{background:#fff;border-radius:12px;border:0.5px solid #e0e0e0;padding:24px;display:flex;gap:20px;align-items:flex-start;margin-bottom:16px;max-width:680px}
.profile-photo{width:80px;height:80px;border-radius:12px;background:#E6F1FB;display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:500;color:#0C447C;overflow:hidden;flex-shrink:0}
.profile-photo img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.profile-details{flex:1}
.profile-name{font-size:20px;font-weight:500;margin-bottom:2px}
.profile-class{font-size:14px;color:#888;margin-bottom:16px}
.profile-fields{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pf-label{font-size:11px;color:#aaa;text-transform:uppercase;letter-spacing:0.4px;margin-bottom:2px}
.pf-value{font-size:14px;font-weight:500;color:#1a1a1a}

/* ── Balance cards ── */
.balance-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px;max-width:440px}
.stat-card{background:#fff;border-radius:10px;border:0.5px solid #e0e0e0;padding:16px}
.stat-label{font-size:12px;color:#888;margin-bottom:4px}
.stat-value{font-size:22px;font-weight:500;color:#1a1a1a}
.stat-value.green{color:#1D9E75}
.stat-value.red{color:#E24B4A}

/* ── Top-up form ── */
.topup-card{background:#fff;border-radius:12px;border:0.5px solid #e0e0e0;padding:20px;margin-bottom:16px;max-width:440px}
.section-label{font-size:12px;color:#888;text-transform:uppercase;letter-spacing:0.4px;margin-bottom:12px}
.amount-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:14px}
.chip{padding:10px;text-align:center;border:1px solid #ddd;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all 0.15s;background:#fff;color:#1a1a1a}
.chip:hover,.chip.selected{border-color:#378ADD;background:#E6F1FB;color:#0C447C}

/* ── QR section ── */
.qr-section{text-align:center;padding:24px 0;display:none;max-width:440px}
.qr-section img{width:220px;height:220px;border:1px solid #eee;border-radius:12px;padding:12px}
.qr-note{font-size:13px;color:#888;margin-top:10px}
.qr-status{font-size:13px;color:#1D9E75;margin-top:8px;font-weight:500}

/* ── Success screen ── */
.success-screen{text-align:center;padding:40px 20px;display:none;max-width:440px}
.success-icon{width:56px;height:56px;background:#EAF3DE;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:28px;color:#1D9E75}
.success-title{font-size:20px;font-weight:500;margin-bottom:8px}
.success-detail{font-size:14px;color:#888}

/* ── Transactions ── */
.txn-card{background:#fff;border-radius:12px;border:0.5px solid #e0e0e0;overflow:hidden;max-width:680px}
.txn-header{padding:16px 20px;border-bottom:0.5px solid #f0f0f0;font-size:14px;font-weight:500}
.txn-row{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:0.5px solid #f8f8f8}
.txn-row:last-child{border-bottom:none}
.txn-label-text{font-size:14px;font-weight:500;color:#1a1a1a}
.txn-items-text{font-size:12px;color:#888;margin-top:2px}
.txn-date-text{font-size:11px;color:#bbb;margin-top:2px}
.txn-right{text-align:right}
.txn-amt{font-size:15px;font-weight:500}
.txn-amt.credit{color:#1D9E75}
.txn-amt.debit{color:#E24B4A}
.txn-bal{font-size:11px;color:#bbb;margin-top:2px}
.txn-empty{padding:40px;text-align:center;color:#bbb;font-size:14px}
.loading-msg{padding:32px;text-align:center;color:#bbb;font-size:14px}

/* ── Responsive ── */
@media(max-width:600px){
  .sidebar{width:72px}
  .child-info,.sidebar-label{display:none}
  .main-content{padding:16px}
  .profile-card{flex-direction:column;align-items:center;text-align:center}
  .profile-fields{grid-template-columns:1fr}
  .amount-grid{grid-template-columns:repeat(2,1fr)}
  .balance-row{grid-template-columns:1fr}
}