:root{--nav:#0b2b55;--nav2:#071a34;--red:#e51c2a;--blue:#1477ff;--yellow:#f3b51b;--green:#10a66a;--bg:#f4f7fb;--card:#fff;--ink:#10213f;--muted:#71809c;--line:#e6edf6;--shadow:0 8px 28px rgba(22,51,88,.08);--radius:18px}
*{box-sizing:border-box} body{margin:0;font-family:Inter,"Be Vietnam Pro","Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--ink)} button,input,select,textarea{font:inherit}.hidden{display:none!important}
.login-shell{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;background:#eef4fb}.login-hero{position:relative;background:linear-gradient(135deg,#071a34 0%,#0b2b55 42%,#123f7e 100%);overflow:hidden;padding:42px;color:white}.login-hero:after{content:"";position:absolute;inset:0;background:url('assets/flag-hnt.png') center/cover no-repeat;opacity:.35;mix-blend-mode:screen}.login-hero>*{position:relative;z-index:1}.brand-logo{width:112px;height:112px;border-radius:50%;object-fit:cover;background:white;border:5px solid rgba(255,255,255,.22)}.brand-title{font-size:42px;font-weight:900;letter-spacing:.5px;margin:18px 0 6px}.brand-sub{font-size:20px;opacity:.9}.motto{font-size:22px;font-style:italic;margin-top:18px}.login-panel{display:flex;align-items:center;justify-content:center;padding:40px}.login-card{width:min(520px,100%);background:white;border-radius:28px;box-shadow:var(--shadow);padding:42px}.login-card .center{text-align:center}.field{display:grid;gap:8px;margin:18px 0}.field label{font-weight:700}.input,.select,.textarea{width:100%;border:1px solid var(--line);background:#fbfdff;border-radius:12px;padding:13px 14px;outline:none}.input:focus,.select:focus,.textarea:focus{border-color:#8ab9ff;box-shadow:0 0 0 3px rgba(20,119,255,.1)}.btn{border:0;border-radius:12px;padding:12px 16px;font-weight:800;cursor:pointer}.btn.primary{background:var(--blue);color:white}.btn.red{background:var(--red);color:white}.btn.green{background:var(--green);color:white}.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--ink)}.btn.warn{background:#fff3d3;color:#9a6500}.btn.small{padding:8px 10px;font-size:13px}
.shell{display:grid;grid-template-columns:255px 1fr;min-height:100vh}.sidebar{background:linear-gradient(180deg,var(--nav),var(--nav2));color:white;padding:18px 14px;position:sticky;top:0;height:100vh;overflow:auto}.side-brand{text-align:center;padding-bottom:16px;border-bottom:1px solid rgba(255,255,255,.09)}.side-brand img{width:86px;height:86px;border-radius:50%;object-fit:cover;background:white}.side-brand h1{font-size:20px;margin:8px 0 2px}.side-brand p{font-size:12px;margin:0;opacity:.8}.nav{display:grid;gap:6px;margin-top:18px}.nav button{display:flex;align-items:center;gap:10px;width:100%;padding:11px 12px;background:transparent;border:0;color:white;border-radius:11px;text-align:left;cursor:pointer;font-weight:650}.nav button.active,.nav button:hover{background:linear-gradient(90deg,var(--red),#ff4050)}.side-footer{margin-top:22px;padding:14px;border-radius:16px;background:linear-gradient(145deg,rgba(229,28,42,.18),rgba(243,181,27,.12));font-size:12px;line-height:1.5}.main{min-width:0}.topbar{height:70px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 22px;position:sticky;top:0;z-index:10}.search{flex:1;max-width:520px}.top-spacer{flex:1}.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#f7d8be,#bed7f7);display:grid;place-items:center;font-weight:900}.content{padding:22px}.hero{position:relative;overflow:hidden;background:white;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:18px}.hero:after{content:"";position:absolute;right:0;top:0;width:52%;height:100%;background:url('assets/flag-hnt.png') center/cover no-repeat;opacity:.16;mask-image:linear-gradient(90deg,transparent,#000 32%)}.hero>*{position:relative;z-index:1}.hero h2{font-size:28px;margin:0 0 6px}.muted{color:var(--muted)}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{background:white;border:1px solid var(--line);border-radius:16px;padding:16px;box-shadow:var(--shadow)}.stat .big{font-size:28px;font-weight:900;margin-top:6px}.stat.red .big{color:var(--red)}.stat.blue .big{color:var(--blue)}.stat.yellow .big{color:#d88f00}.stat.green .big{color:var(--green)}.card{background:white;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.grid2{display:grid;grid-template-columns:1.35fr .65fr;gap:16px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}.section-title h3{margin:0}.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}.toolbar .input,.toolbar .select{width:auto;min-width:180px}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;font-size:14px}.table th{background:#f6f9fd;color:#42526e;text-align:left;padding:11px;border-bottom:1px solid var(--line);white-space:nowrap}.table td{padding:11px;border-bottom:1px solid var(--line);vertical-align:middle}.table tr:hover td{background:#fbfdff}.chip{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800}.chip.green{background:#e5f8ef;color:#0b8b58}.chip.red{background:#ffe8eb;color:#d61425}.chip.yellow{background:#fff4d4;color:#9c6900}.chip.blue{background:#e7f1ff;color:#1166dc}.chip.purple{background:#f0e9ff;color:#6b3ad8}.badge-belt{display:inline-block;border-radius:8px;padding:5px 8px;color:#fff;font-weight:800;font-size:12px;background:var(--blue)}.mini-photo{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#d9e8f9,#ffe4cc);display:grid;place-items:center;font-weight:900;overflow:hidden;flex:0 0 42px}.mini-photo img{width:100%;height:100%;object-fit:cover}.student-cell{display:flex;gap:10px;align-items:center;min-width:210px}.bar{height:10px;border-radius:999px;background:#edf2f8;overflow:hidden}.bar>span{display:block;height:100%;background:var(--blue);border-radius:999px}.chart{height:220px;display:flex;align-items:end;gap:8px;padding:18px 4px 0;border-bottom:1px solid var(--line)}.chart i{flex:1;background:linear-gradient(180deg,#6ca9ff,#1477ff);border-radius:6px 6px 0 0;min-width:10px}.list{display:grid;gap:10px}.list-item{display:flex;align-items:center;justify-content:space-between;padding:11px;border:1px solid var(--line);border-radius:12px}.tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:16px}.tab{padding:11px 14px;border:0;background:transparent;font-weight:800;color:#657491;border-bottom:3px solid transparent;cursor:pointer}.tab.active{color:var(--red);border-color:var(--red)}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.form-grid.three{grid-template-columns:repeat(3,1fr)}.full{grid-column:1/-1}.profile-head{display:grid;grid-template-columns:120px 1fr;gap:18px;align-items:center}.profile-photo{width:120px;height:150px;border-radius:18px;background:linear-gradient(135deg,#e0ebf8,#ffe4c8);display:grid;place-items:center;font-size:42px;overflow:hidden;border:1px solid var(--line)}.profile-photo img{width:100%;height:100%;object-fit:cover}.photo-upload-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.photo-upload-row .input{max-width:360px}.actions{display:flex;gap:8px;flex-wrap:wrap}.attendance-btns{display:flex;gap:6px;flex-wrap:wrap}.att{border:1px solid var(--line);background:#fff;border-radius:10px;padding:7px 9px;cursor:pointer}.att.present.active{background:#e7f9f0;border-color:#80dfb6;color:#078a54}.att.absent.active{background:#ffedf0;border-color:#ff9eaa;color:#d61425}.att.excused.active{background:#eaf2ff;border-color:#99bfff;color:#1166dc}.receipt-layout{display:grid;grid-template-columns:1fr 1fr;gap:16px}.receipt{background:white;border:2px solid #17345d;padding:22px;min-height:680px;position:relative}.receipt .receipt-logo{width:72px;height:72px;border-radius:50%;object-fit:cover}.receipt .stamp{position:absolute;right:44px;bottom:165px;border:4px solid var(--red);color:var(--red);font-weight:900;font-size:26px;padding:10px 18px;transform:rotate(-8deg);opacity:.9}.receipt .sign{position:absolute;right:52px;bottom:55px;text-align:center}.receipt table{width:100%;border-collapse:collapse;margin-top:14px}.receipt th,.receipt td{border:1px solid #b7c5da;padding:8px}.receipt th{background:#eef5ff}.settings-row{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr auto;gap:10px;align-items:end;padding:12px;border:1px solid var(--line);border-radius:14px;margin-bottom:10px}.notice{padding:10px 12px;border-radius:12px;background:#fff8dc;border:1px solid #ffe38d;color:#775000}.danger{color:var(--red)}.right{margin-left:auto}.small{font-size:12px}.hr{height:1px;background:var(--line);margin:12px 0}.mobile-note{display:none}
@media(max-width:1100px){.shell{grid-template-columns:86px 1fr}.side-brand h1,.side-brand p,.nav span,.side-footer{display:none}.side-brand img{width:56px;height:56px}.nav button{justify-content:center}.grid4{grid-template-columns:repeat(2,1fr)}.grid2,.receipt-layout{grid-template-columns:1fr}.settings-row{grid-template-columns:1fr 1fr}.topbar .date-label{display:none}}
@media(max-width:700px){.shell{grid-template-columns:1fr}.sidebar{position:fixed;bottom:0;top:auto;height:70px;width:100%;z-index:30;padding:6px}.side-brand,.side-footer{display:none}.nav{display:flex;overflow:auto;margin:0}.nav button{min-width:72px;padding:8px}.main{padding-bottom:74px}.content{padding:12px}.grid4,.grid3,.form-grid,.form-grid.three{grid-template-columns:1fr}.profile-head{grid-template-columns:1fr}.profile-photo{margin:auto}.topbar{padding:0 10px}.topbar .search{display:none}.hero:after{opacity:.08;width:100%}.mobile-note{display:block}.settings-row{grid-template-columns:1fr}.receipt{min-height:740px}}

/* V2.1 */
.settings-row{grid-template-columns:1.25fr .9fr 1.15fr 1.1fr 1fr auto}
@media print{
  body{background:#fff}
  .sidebar,.topbar,.content>*:not(.receipt-layout){display:none!important}
  .receipt-layout{display:block!important}
  .receipt-layout>.card{display:none!important}
  .receipt-layout>div{width:100%!important}
  .receipt{border:0!important;box-shadow:none!important;min-height:0!important;width:148mm!important;margin:0 auto!important}
  .receipt-layout .actions{display:none!important}
}

/* V2.2 - Phiếu thu chính thức */
.receipt-official{overflow:hidden;border:2px solid #123a73;border-radius:2px;padding:20px 20px 24px;min-height:700px;color:#102a5e;background:#fff;box-shadow:0 8px 28px rgba(12,39,82,.08)}
.receipt-official:before{content:"";position:absolute;inset:6px;border:1px solid #7fa3cf;pointer-events:none}
.receipt-brush{position:absolute;left:0;right:0;height:82px;background:url('assets/flag-hnt.png') center/cover no-repeat;opacity:.1;pointer-events:none}
.receipt-brush.top{top:-18px;clip-path:polygon(45% 0,100% 0,100% 100%,58% 70%)}
.receipt-brush.bottom{bottom:-30px;opacity:.12;transform:rotate(180deg);clip-path:polygon(0 35%,100% 5%,100% 100%,0 100%)}
.receipt-header{display:grid;grid-template-columns:70px 1fr 155px;gap:12px;align-items:center;position:relative;z-index:1}
.receipt-official .receipt-logo{width:64px;height:64px;border-radius:50%;object-fit:cover}
.receipt-brand-name{font-size:21px;font-weight:900;color:#d71920;letter-spacing:.2px}.receipt-brand-sub{font-size:14px;font-weight:800}.receipt-motto{font-size:11px;font-style:italic;margin-top:3px}
.receipt-point{display:grid;gap:2px;text-align:right;font-size:10px;line-height:1.25}.receipt-divider{height:1px;background:linear-gradient(90deg,transparent,#2f5d97 20%,#2f5d97 80%,transparent);margin:12px 20px 10px}
.receipt-title-row{display:grid;grid-template-columns:1fr 155px;align-items:center;gap:8px}.receipt-title-row h1{font-family:Georgia,'Times New Roman',serif;font-size:36px;letter-spacing:1px;color:#102a5e;text-align:center;margin:4px 0 10px}.receipt-meta{font-size:10px;line-height:1.7;text-align:right}.redtxt{color:#e11919}.bluetxt{color:#0864d8}
.receipt-info{display:grid;gap:8px;font-size:11px;margin:8px 4px 14px}.receipt-info>div{display:grid;grid-template-columns:62px 10px 1fr;align-items:center}.receipt-info .split{display:grid;grid-template-columns:1.3fr .8fr .9fr;gap:10px}.receipt-info .split>div{display:block}
.receipt-table{width:100%;border-collapse:separate!important;border-spacing:0;margin-top:8px;border:1px solid #a9c2e4;border-radius:7px;overflow:hidden}.receipt-table th{background:#eaf3ff!important;color:#102a5e;text-align:center!important;font-weight:900}.receipt-table td{text-align:left}.receipt-table td:first-child{text-align:center}.receipt-table td.amount{text-align:right;font-weight:800}.receipt-table .total-row td{background:#fff0f1}.receipt-table .total-row td:first-child{text-align:right!important;color:#0761c8;font-size:14px}.receipt-table .total-row td:last-child{text-align:right;color:#e11919;font-size:17px}
.receipt-details{font-size:11px;line-height:1.45;margin-top:16px;max-width:68%}.receipt-details p{margin:7px 0}.due-line{background:#fff2d6;border:1px solid #ffd36d;border-radius:8px;padding:7px 9px;color:#d71920!important;font-weight:900}
.receipt-official .stamp{right:32px;bottom:206px;border:4px double #e11919;font-size:23px;padding:9px 14px;background:rgba(255,255,255,.85)}
.receipt-watermark{position:absolute;left:30px;bottom:58px;display:flex;align-items:end;gap:12px;color:#7790ae;opacity:.55}.receipt-watermark .fighter{font-size:56px;filter:grayscale(1)}.receipt-watermark em{font-family:Georgia,serif;font-size:13px;line-height:1.35}
.receipt-official .sign{right:44px;bottom:50px;width:140px}.receipt-official .sign b{font-size:12px}.receipt-official .sign strong{font-size:11px}.signature-stroke{font-family:cursive;font-size:28px;color:#0b55d8;transform:rotate(-7deg);margin:7px 0 -2px;text-decoration:underline;text-decoration-thickness:1px}
@media(max-width:700px){.receipt-official{min-height:720px;padding:14px 12px}.receipt-header{grid-template-columns:54px 1fr}.receipt-point{grid-column:1/-1;text-align:left;padding-left:4px}.receipt-official .receipt-logo{width:50px;height:50px}.receipt-brand-name{font-size:17px}.receipt-title-row{grid-template-columns:1fr}.receipt-title-row h1{font-size:30px}.receipt-meta{text-align:left;display:flex;gap:15px}.receipt-info .split{grid-template-columns:1fr}.receipt-details{max-width:100%;padding-right:0}.receipt-official .stamp{right:22px;bottom:185px;font-size:18px}.receipt-watermark{opacity:.3}.receipt-official .sign{bottom:42px}}

/* V2.7 - khóa nghiệp vụ trước Production */
.v27-filterbar{position:sticky;top:0;z-index:4;background:#fff;padding:8px 0;border-bottom:1px solid var(--line)}
.v27-filterbar .input{flex:1;min-width:240px}
.package-settings-head,.package-settings-row{display:grid;grid-template-columns:1.35fr .9fr .85fr .7fr .7fr .8fr auto;gap:8px;align-items:center}
.package-settings-head{padding:0 4px 7px;color:#657491;font-size:12px}
.package-settings-row{padding:10px;border:1px solid var(--line);border-radius:12px;margin-bottom:8px;background:#fff}
.mobile-quick .actions .btn{min-height:44px}
.v27-table-mobile{scrollbar-width:thin}
@media(max-width:700px){
  .v27-filterbar{position:static;display:grid;grid-template-columns:1fr;gap:8px}
  .v27-filterbar .input,.v27-filterbar .select,.v27-filterbar .btn{width:100%;min-width:0}
  .v27-table-mobile{margin-left:-4px;margin-right:-4px;border:1px solid var(--line);border-radius:12px}
  .v27-table-mobile .table{min-width:980px}
  .package-settings-head{display:none}
  .package-settings-row{grid-template-columns:1fr 1fr}
  .package-settings-row .input:first-child{grid-column:1/-1}
  .mobile-quick .actions{display:grid;grid-template-columns:1fr 1fr}
  .mobile-quick .actions .btn{width:100%;font-size:14px;padding:12px 8px}
  .attendance-btns .att{min-height:42px;min-width:88px}
  .photo-upload-row .input,.photo-upload-row .btn{width:100%;max-width:none}
}
@media(max-width:430px){
  .mobile-quick .actions{grid-template-columns:1fr}
  .package-settings-row{grid-template-columns:1fr}
}

/* ================= V3.1.4 - Receipt UX Redesign ================= */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.payment-hero{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px 22px;box-shadow:var(--shadow);margin-bottom:16px;display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:88px}
.payment-hero:after{content:"";position:absolute;inset:0 0 0 38%;background:url('assets/flag-hnt.png') center 42%/cover no-repeat;opacity:.16;mask-image:linear-gradient(90deg,transparent,#000 28%)}
.payment-hero>*{position:relative;z-index:1}.payment-hero-copy{display:flex;align-items:center;gap:13px}.payment-hero-icon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:#fff2f3;color:var(--red);border:1px solid #ffd3d8;font-size:23px;font-weight:900}
.payment-hero h2{margin:0;font-size:29px;color:#0b2b55}.payment-hero-motto{display:grid;text-align:right;font-style:italic;color:var(--red);font-size:16px;line-height:1.25;padding-right:8%}.payment-hero-motto span{color:#18375f}
.receipt-layout-v314{grid-template-columns:minmax(570px,1.08fr) minmax(500px,.92fr);align-items:start;gap:16px}.payment-left{display:grid;gap:16px}.payment-card{padding:16px;border-radius:18px}
.payment-section-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}.payment-section-head h3{margin:0;color:#122f5b;font-size:18px}.payment-section-head .btn{margin-left:auto}.step-badge{width:29px;height:29px;border-radius:50%;display:inline-grid;place-items:center;background:var(--red);color:#fff;font-weight:900;flex:0 0 29px}
.payment-student{display:grid;grid-template-columns:112px 1fr;gap:16px;align-items:center;background:linear-gradient(135deg,#fff,#f8fbff);border:1px solid #e2eaf4;border-radius:15px;padding:12px}.payment-student-photo{width:112px;height:132px;border-radius:14px;overflow:hidden;background:linear-gradient(135deg,#e7eef8,#fff1e4);display:grid;place-items:center;font-size:42px;border:1px solid #e1e8f1}.payment-student-photo img{width:100%;height:100%;object-fit:cover}.payment-student-name{font-weight:900;font-size:20px;color:#112e59;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.payment-meta-row{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 6px;color:#35577e;font-size:13px}.payment-meta-line{margin:5px 0;color:#294c76;font-size:13px}.meta-ico{display:inline-grid;width:20px;text-align:center;color:#1672ff;font-weight:900}.belt-ico{color:#18a85f}.meta-sep{padding:0 8px;color:#c3cfdd}
.payment-label{display:block;font-weight:850;color:#163c70;margin:2px 0 8px}.required{color:var(--red)}
.pay-type-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:14px}.pay-type-card{border:1px solid #dce6f2;background:#fff;border-radius:12px;padding:11px 9px;min-height:86px;display:flex;gap:9px;align-items:flex-start;text-align:left;cursor:pointer;color:#17375f;transition:.18s}.pay-type-card:hover{transform:translateY(-1px);border-color:#a8c5ea;box-shadow:0 7px 18px rgba(15,55,100,.08)}.pay-type-card.active{border:1.5px solid #ff3547;background:#fff4f5;box-shadow:0 0 0 3px rgba(235,35,52,.06)}.pay-type-card b{display:block;font-size:13px;line-height:1.28}.pay-type-card small{display:block;color:#7b8da4;font-size:10px;margin-top:4px;line-height:1.25}.pay-type-icon{width:28px;height:28px;border-radius:10px;display:grid;place-items:center;flex:0 0 28px;font-weight:900}.pay-type-icon.red{background:#ffe7ea;color:#e31b30}.pay-type-icon.blue{background:#e8f1ff;color:#1a6fe8}.pay-type-icon.gold{background:#fff1cd;color:#c88700}.pay-type-icon.slate{background:#eff3f8;color:#47617f}
.amount-top-grid{display:grid;grid-template-columns:.66fr 1.34fr;gap:12px;align-items:end}.payment-money-field{margin:0}.money-input-wrap{display:flex;align-items:center;border:1px solid #dce5ef;border-radius:11px;overflow:hidden;background:#fff;min-height:44px}.money-input-wrap>span{width:44px;align-self:stretch;display:grid;place-items:center;background:#eef3f8;color:#74869d;font-weight:900}.money-input-wrap .input{border:0!important;box-shadow:none!important;border-radius:0!important;font-size:17px;font-weight:800;padding-left:12px}.money-input-wrap.received>span{background:#e8f8ef;color:#0b9c57}.money-input-wrap.discount>span{background:#eef3f8;color:#607892}.money-input-wrap.due{background:#e8f8ef;border-color:#c8edda}.money-input-wrap.due>span{background:#d9f4e6;color:#0a9f5c}.money-input-wrap.due.has-due{background:#fff5df;border-color:#ffd77c}.money-input-wrap.due.has-due>span{background:#ffecbd;color:#c07b00}
.quick-field{margin:0}.quick-money-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}.quick-money{border:1px solid #d8e4f1;background:#fff;color:#126ce0;border-radius:9px;min-height:44px;font-weight:800;cursor:pointer}.quick-money:hover,.quick-money.active{border-color:#ff4150;background:#fff0f1;color:#e31a2d}.payment-totals-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:13px 0}
.pay-method-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:13px}.pay-method{min-height:42px;border:1px solid #dbe5f1;background:#fff;border-radius:10px;color:#224971;font-weight:750;cursor:pointer}.pay-method.active{border-color:#ff4050;background:#fff2f3;color:#e31b30}.note-field{margin-bottom:0}.note-wrap{position:relative}.note-wrap textarea{min-height:54px;padding-right:68px}.note-wrap span{position:absolute;right:10px;bottom:9px;color:#8493a8;font-size:11px}
.receipt-preview-card{position:sticky;top:86px}.receipt-preview-head{justify-content:space-between}.receipt-preview-head>div:first-child{display:flex;align-items:center;gap:10px}.preview-tools{margin-left:auto;display:flex;gap:8px;align-items:center}.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid #dbe5f1;background:#fff;color:#153e72;font-weight:900;cursor:pointer}.select.compact{min-width:150px;height:38px;padding:6px 10px}
.receipt-v314{min-height:675px;padding:18px 18px 22px;border-radius:4px}.receipt-v314 .receipt-header{grid-template-columns:66px 1fr 140px;gap:10px}.receipt-v314 .receipt-logo{width:60px;height:60px}.receipt-v314 .receipt-brand-name{font-size:19px}.receipt-v314 .receipt-brand-sub{font-size:13px}.receipt-v314 .receipt-motto{font-size:10px}.receipt-v314 .receipt-point{font-size:9px}.receipt-v314 .receipt-title-row{grid-template-columns:1fr 138px}.receipt-v314 .receipt-title-row h1{font-size:33px}.receipt-v314 .receipt-info{font-size:10.2px;gap:6px;margin-bottom:10px}.receipt-v314 .receipt-table th,.receipt-v314 .receipt-table td{padding:7px;font-size:10px}
.receipt-settlement{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid #dae5f1;border-top:0;border-radius:0 0 8px 8px;overflow:hidden;background:#f8fbff}.receipt-settlement>div{padding:7px 8px;text-align:center;border-right:1px solid #dae5f1}.receipt-settlement>div:last-child{border-right:0;background:#eaf9f1}.receipt-settlement span{display:block;color:#75889f;font-size:9px}.receipt-settlement b{display:block;color:#163a68;font-size:11px;margin-top:2px}.receipt-settlement #rDueBox.has-due{background:#fff2d6}.receipt-settlement #rDueBox.has-due b{color:#d71920}
.receipt-v314 .receipt-details{margin-top:11px;font-size:10px;line-height:1.35;max-width:66%}.receipt-v314 .receipt-details p{margin:5px 0}.receipt-v314 .stamp{right:22px;bottom:185px;font-size:20px;padding:8px 11px}.receipt-v314 .receipt-watermark{bottom:43px;left:24px}.watermark-figure{font-size:44px;filter:grayscale(1)}.receipt-v314 .receipt-watermark em{font-size:11px}.receipt-v314 .sign{right:25px;bottom:35px;width:160px;display:flex;flex-direction:column;align-items:center}.receipt-signature-img{width:145px;height:40px;object-fit:contain;object-position:center;display:block;margin:4px auto -1px;filter:saturate(1.12) contrast(1.04)}
.receipt-actions{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr;gap:8px;margin-top:10px}.receipt-actions .btn{min-height:44px}.receipt-main-action{font-weight:900}
@media(max-width:1350px){.receipt-layout-v314{grid-template-columns:1fr}.receipt-preview-card{position:relative;top:auto}.payment-hero-motto{display:none}.pay-type-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){.payment-hero{padding:14px}.payment-hero h2{font-size:23px}.payment-student{grid-template-columns:82px 1fr}.payment-student-photo{width:82px;height:104px}.payment-meta-row{display:grid;grid-template-columns:1fr}.amount-top-grid,.payment-totals-grid{grid-template-columns:1fr}.quick-money-grid{grid-template-columns:repeat(4,1fr)}.pay-method-grid{grid-template-columns:repeat(2,1fr)}.receipt-actions{grid-template-columns:1fr 1fr}.receipt-v314 .receipt-header{grid-template-columns:54px 1fr}.receipt-v314 .receipt-point{grid-column:1/-1;text-align:left}.receipt-v314 .receipt-title-row{grid-template-columns:1fr}.receipt-v314 .receipt-meta{text-align:left;display:flex;gap:12px}.receipt-v314 .receipt-info .split{grid-template-columns:1fr}.receipt-v314 .receipt-details{max-width:100%;padding-right:0}.receipt-v314 .stamp{bottom:175px}.receipt-v314 .sign{bottom:30px}}
@media(max-width:520px){.pay-type-grid{grid-template-columns:1fr}.payment-card{padding:12px}.payment-student{grid-template-columns:1fr}.payment-student-photo{width:92px;height:112px}.receipt-actions{grid-template-columns:1fr}.quick-money-grid{grid-template-columns:repeat(4,1fr)}}

@media print{
  .receipt-layout-v314{display:block!important}
  .receipt-layout-v314>.payment-left{display:none!important}
  .receipt-layout-v314>.receipt-preview-card{display:block!important;border:0!important;box-shadow:none!important;padding:0!important;width:100%!important}
  .receipt-layout-v314 .receipt-preview-head,.receipt-layout-v314 .receipt-actions{display:none!important}
  .receipt-layout-v314 .receipt-v314{display:block!important;width:148mm!important;min-height:0!important;margin:0 auto!important;border:0!important;box-shadow:none!important}
}


/* ==========================================================
   V3.1.5 MOBILE UI + BRAND SYNC
   Mobile-first polish for login, navigation and core screens.
   ========================================================== */
.mobile-top-brand{display:none}.mobile-nav-overlay{display:none}.mobile-login-name{display:none}.login-submit{width:100%;min-height:50px}.login-safe-note{margin-top:16px;text-align:center;color:#7a8ca6;font-size:12px;line-height:1.45}.login-hero-pills{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.login-hero-pills span{border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.1);backdrop-filter:blur(8px);padding:8px 12px;border-radius:999px;font-size:12px;font-weight:800}.login-hero-glow{position:absolute;inset:auto -90px -120px auto;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(243,181,27,.36),rgba(229,28,42,.12) 45%,transparent 70%);filter:blur(8px);z-index:0}.login-v315 .login-card{border:1px solid rgba(19,60,111,.08)}

@media(max-width:800px){
  html,body{max-width:100%;overflow-x:hidden;background:#eef4fb}
  body.nav-open{overflow:hidden}
  .login-v315{display:block;min-height:100svh;background:
    radial-gradient(circle at 90% 3%,rgba(243,181,27,.17),transparent 30%),
    radial-gradient(circle at 4% 92%,rgba(20,119,255,.12),transparent 28%),
    linear-gradient(180deg,#f8fbff 0%,#eef4fb 100%)}
  .login-v315 .login-hero{display:none!important}
  .login-v315 .login-panel{min-height:100svh;padding:20px 14px;align-items:center;background:transparent}
  .login-v315 .login-card{width:min(100%,460px);padding:26px 20px 22px;border-radius:26px;box-shadow:0 18px 50px rgba(12,39,82,.13);position:relative;overflow:hidden}
  .login-v315 .login-card:before{content:"";position:absolute;left:0;right:0;top:0;height:7px;background:linear-gradient(90deg,#e51c2a 0 34%,#f3b51b 34% 53%,#1477ff 53% 100%)}
  .login-v315 .login-card-head{padding-top:2px}
  .login-v315 .login-card .brand-logo{width:86px;height:86px;border:4px solid #fff;box-shadow:0 7px 22px rgba(12,39,82,.16);margin-bottom:8px}
  .mobile-login-name{display:block;color:#e51c2a;font-size:18px;letter-spacing:.3px;font-weight:950;margin-top:2px}
  .login-v315 .login-card h2{font-size:27px;line-height:1.18;margin:8px 0 7px;color:#0c2f5f}
  .login-v315 .login-card .muted{font-size:13px;line-height:1.55;max-width:330px;margin:0 auto 18px}
  .login-v315 .field{margin:14px 0;gap:7px}
  .login-v315 .field label{font-size:14px;color:#183a67}
  .login-v315 .input{min-height:52px;font-size:16px;border-radius:14px;padding:13px 14px;background:#fff}
  .login-v315 .login-submit{min-height:52px;border-radius:14px;font-size:17px;background:linear-gradient(135deg,#1477ff,#085ed8);box-shadow:0 10px 20px rgba(20,119,255,.22)}
  .login-v315 .login-error{min-height:18px;margin-top:8px}

  .shell-v315{display:block;min-height:100svh}
  .shell-v315 .sidebar{position:fixed!important;left:0;top:0!important;bottom:auto!important;width:min(84vw,320px)!important;height:100svh!important;padding:16px 12px 20px!important;transform:translateX(-108%);transition:transform .22s ease;z-index:80;box-shadow:18px 0 40px rgba(4,25,54,.28);overflow-y:auto}
  .shell-v315 .sidebar.mobile-open{transform:translateX(0)}
  .shell-v315 .side-brand{display:block!important;padding:6px 8px 16px!important}
  .shell-v315 .side-brand img{width:72px!important;height:72px!important}
  .shell-v315 .side-brand h1{display:block!important;font-size:19px!important;margin:8px 0 3px!important}
  .shell-v315 .side-brand p{display:block!important;font-size:11px!important;line-height:1.45!important}
  .shell-v315 .nav{display:grid!important;gap:5px!important;margin-top:12px!important;overflow:visible!important}
  .shell-v315 .nav button{min-width:0!important;width:100%!important;justify-content:flex-start!important;padding:11px 12px!important;border-radius:12px!important}
  .shell-v315 .nav button span{display:inline!important;font-size:14px!important;white-space:normal!important}
  .shell-v315 .nav button b{width:24px;text-align:center}
  .shell-v315 .side-footer{display:block!important;margin-top:14px!important;padding:11px!important;background:rgba(255,255,255,.07)!important}
  .mobile-nav-overlay{display:block;position:fixed;inset:0;background:rgba(4,22,47,.42);opacity:0;pointer-events:none;transition:opacity .22s ease;z-index:70;backdrop-filter:blur(2px)}
  .mobile-nav-overlay.show{opacity:1;pointer-events:auto}
  .shell-v315 .main{padding-bottom:0!important;min-width:0}
  .shell-v315 .topbar{height:64px;padding:0 10px;gap:8px;z-index:60;box-shadow:0 4px 16px rgba(12,39,82,.06)}
  .mobile-menu-btn{width:42px;min-width:42px;height:42px;padding:0!important;border-radius:12px!important;font-size:18px}
  .mobile-top-brand{display:flex;align-items:center;gap:8px;min-width:0}
  .mobile-top-brand img{width:34px;height:34px;border-radius:50%;object-fit:cover;border:1px solid #e6edf7}
  .mobile-top-brand>div{display:grid;min-width:0}.mobile-top-brand b{font-size:12px;color:#0c2f5f;white-space:nowrap}.mobile-top-brand span{font-size:10px;color:#778aa4;white-space:nowrap}
  .shell-v315 .topbar .search,.shell-v315 .date-label,.shell-v315 .quick-add-btn{display:none!important}
  .shell-v315 .top-spacer{flex:1}
  .shell-v315 .avatar{width:36px;height:36px;min-width:36px;font-size:12px}
  .shell-v315 .top-user-meta{display:none}
  .shell-v315 .content{padding:12px 10px 20px!important}
  .shell-v315 .hero{padding:16px!important;border-radius:16px!important;margin-bottom:12px!important}
  .shell-v315 .hero h2{font-size:22px!important;line-height:1.25}.shell-v315 .hero .muted{font-size:13px;line-height:1.55}
  .shell-v315 .grid4{grid-template-columns:1fr 1fr!important;gap:10px!important}
  .shell-v315 .grid3,.shell-v315 .grid2,.shell-v315 .form-grid,.shell-v315 .form-grid.three{grid-template-columns:1fr!important;gap:10px!important}
  .shell-v315 .stat{padding:13px;border-radius:15px}.shell-v315 .stat .big{font-size:24px}
  .shell-v315 .card{padding:14px;border-radius:16px}
  .shell-v315 .toolbar{display:grid;grid-template-columns:1fr;gap:8px}.shell-v315 .toolbar .input,.shell-v315 .toolbar .select{width:100%!important;min-width:0!important}
  .shell-v315 .section-title{align-items:flex-start;flex-wrap:wrap}.shell-v315 .section-title .btn{width:auto}
  .shell-v315 .input,.shell-v315 .select,.shell-v315 .textarea{font-size:16px;min-height:46px}
  .shell-v315 .btn{min-height:44px}
  .shell-v315 .table-wrap{margin-left:-2px;margin-right:-2px;border-radius:12px;-webkit-overflow-scrolling:touch}
  .shell-v315 .table{font-size:13px}.shell-v315 .table th,.shell-v315 .table td{padding:10px}
  .shell-v315 .profile-head{grid-template-columns:1fr!important;text-align:center}.shell-v315 .profile-head .grid3{grid-template-columns:1fr 1fr!important}.shell-v315 .profile-photo{margin:auto}
  .shell-v315 .settings-row{grid-template-columns:1fr!important}
  .shell-v315 .mobile-quick .actions{grid-template-columns:1fr 1fr!important}
  .receipt-layout-v314{grid-template-columns:1fr!important}.receipt-preview-card{position:relative!important;top:auto!important}
  .payment-hero{padding:14px!important}.payment-hero h2{font-size:22px!important}.payment-hero-motto{display:none!important}.payment-card{padding:12px!important}
  .payment-student{grid-template-columns:76px 1fr!important;gap:11px!important}.payment-student-photo{width:76px!important;height:96px!important}.payment-student-name{font-size:18px!important}
  .payment-meta-row,.amount-top-grid,.payment-totals-grid{grid-template-columns:1fr!important}.quick-money-grid{grid-template-columns:repeat(4,1fr)!important}.pay-method-grid{grid-template-columns:1fr 1fr!important}.pay-type-grid{grid-template-columns:1fr 1fr!important}
  .receipt-v314{min-height:0!important;padding:12px 10px 18px!important;overflow-x:auto}.receipt-v314 .receipt-header{grid-template-columns:48px 1fr!important}.receipt-v314 .receipt-logo{width:46px!important;height:46px!important}.receipt-v314 .receipt-point{grid-column:1/-1!important;text-align:left!important}.receipt-v314 .receipt-title-row{grid-template-columns:1fr!important}.receipt-v314 .receipt-title-row h1{font-size:28px!important}.receipt-v314 .receipt-meta{text-align:left!important;display:flex!important;gap:12px!important;flex-wrap:wrap}.receipt-v314 .receipt-info .split{grid-template-columns:1fr!important}.receipt-v314 .receipt-details{max-width:100%!important}.receipt-v314 .stamp{position:relative!important;right:auto!important;bottom:auto!important;width:max-content;max-width:100%;margin:14px 0 8px auto;font-size:17px!important;transform:rotate(-5deg)}.receipt-v314 .sign{position:relative!important;right:auto!important;bottom:auto!important;margin:14px 0 0 auto}.receipt-v314 .receipt-watermark{display:none!important}.receipt-actions{grid-template-columns:1fr 1fr!important;gap:8px!important}.receipt-actions .receipt-main-action{grid-column:1/-1}
}

@media(max-width:430px){
  .login-v315 .login-panel{padding:14px 10px}.login-v315 .login-card{padding:24px 16px 20px;border-radius:22px}.login-v315 .login-card h2{font-size:25px}.login-v315 .login-card .brand-logo{width:78px;height:78px}
  .shell-v315 .content{padding:10px 8px 18px!important}.shell-v315 .grid4{grid-template-columns:1fr 1fr!important}.shell-v315 .stat{padding:12px}.shell-v315 .stat .big{font-size:22px}.shell-v315 .hero h2{font-size:20px!important}
  .shell-v315 .profile-head .grid3{grid-template-columns:1fr!important}.pay-type-grid{grid-template-columns:1fr!important}.quick-money-grid{grid-template-columns:repeat(4,1fr)!important}.receipt-actions{grid-template-columns:1fr!important}.receipt-actions .receipt-main-action{grid-column:auto}
}

@media(max-width:360px){.shell-v315 .grid4{grid-template-columns:1fr!important}.mobile-top-brand span{display:none}.quick-money-grid{grid-template-columns:repeat(3,1fr)!important}}