/* NOTA WA — Revisi CSS
   Mobile-first, ringan, profesional, siap PDF/PNG
*/
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-soft:#eff6ff;
  --success:#15803d;--success-soft:#f0fdf4;
  --warning:#b45309;--warning-soft:#fffbeb;
  --danger:#dc2626;--danger-soft:#fef2f2;
  --bg:#f6f7f9;--surface:#fff;--surface-soft:#f8fafc;
  --text:#111827;--text-secondary:#4b5563;--text-muted:#6b7280;
  --border:#e5e7eb;--border-strong:#d1d5db;
  --radius-sm:8px;--radius-md:12px;--radius-lg:16px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow-md:0 4px 14px rgba(15,23,42,.07);
  --max-content:880px;
}
*,*::before,*::after{box-sizing:border-box}
html{min-width:320px;scroll-behavior:smooth}
body{margin:0;min-height:100vh;padding-bottom:0;background:var(--bg);color:var(--text);
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}img{max-width:100%}

.app-header{background:var(--surface);border-bottom:1px solid var(--border);padding:16px;text-align:center}
.app-header h1{margin:0;color:var(--text);font-size:1.25rem;font-weight:750;letter-spacing:-.02em}
.tagline{margin-top:3px;color:var(--text-muted);font-size:.8rem}

.app-container{width:min(100% - 24px,var(--max-content));margin:0 auto;padding:16px 0 24px}
.view{display:none}.view.active{display:block}

.card{margin-bottom:14px;padding:16px;background:var(--surface);border:1px solid var(--border);
border-radius:var(--radius-md);box-shadow:var(--shadow-sm)}
.card h2{margin:0 0 14px;padding:0 0 10px;border-bottom:1px solid var(--border);
font-size:1.05rem;font-weight:700}.card h3{margin:18px 0 9px;font-size:.95rem;font-weight:700}

.form-group{margin-bottom:13px}.form-row{display:grid;grid-template-columns:1fr;gap:12px}
label{display:block;margin-bottom:5px;color:var(--text-secondary);font-size:.82rem;font-weight:650}
input,select,textarea{width:100%;min-height:44px;padding:10px 12px;background:var(--surface);
color:var(--text);border:1px solid var(--border-strong);border-radius:var(--radius-sm);outline:none;
transition:border-color .15s,box-shadow .15s,background .15s}
textarea{min-height:88px;resize:vertical}input::placeholder,textarea::placeholder{color:#9ca3af}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
input[readonly]{background:var(--surface-soft);color:var(--text-secondary)}

.text-large{color:var(--primary);font-size:1.25rem;font-weight:750}
.highlight{padding:14px;background:var(--primary-soft);border:1px solid #bfdbfe;border-radius:var(--radius-md)}
.total-box{margin-top:14px;padding:16px;background:var(--text);color:#fff;border-radius:var(--radius-md)}
.total-box .label{color:#d1d5db;font-size:.8rem}.total-box .amount{margin-top:2px;font-size:1.65rem;font-weight:800}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;width:100%;
padding:10px 15px;border:1px solid transparent;border-radius:var(--radius-sm);font-size:.92rem;
font-weight:700;line-height:1.2;text-align:center;cursor:pointer;transition:background .15s,border-color .15s,transform .05s,opacity .15s}
.btn:active{transform:translateY(1px)}.btn:disabled{cursor:not-allowed;opacity:.55}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#475569;color:#fff}.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}
.btn-outline{background:var(--surface);border-color:var(--border-strong);color:var(--text)}
.btn-outline:hover{background:var(--surface-soft)}.btn-large{min-height:50px;font-size:1rem}
.action-buttons{display:grid;grid-template-columns:1fr;gap:9px;margin-top:18px}

.item-row{margin-bottom:12px;padding:14px;background:var(--surface-soft);border:1px solid var(--border);border-radius:var(--radius-md)}
.item-row:last-child{margin-bottom:0}
.item-row-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:11px}
.item-row-title{min-width:0;font-size:.9rem;font-weight:750}
.remove-item{position:static;flex:0 0 auto;padding:5px 8px;background:transparent;color:var(--danger);
border:1px solid transparent;border-radius:6px;font-size:.78rem;font-weight:650;cursor:pointer}
.remove-item:hover{background:var(--danger-soft);border-color:#fecaca}
.item-subtotal{display:flex;justify-content:space-between;gap:12px;margin-top:8px;padding-top:9px;
border-top:1px dashed var(--border-strong);color:var(--text-secondary);font-size:.85rem}
.item-subtotal strong{color:var(--text)}

.status-badge{display:inline-flex;align-items:center;min-height:26px;padding:4px 9px;border-radius:999px;
font-size:.72rem;font-weight:800;letter-spacing:.02em}
.status-draft{background:var(--warning-soft);color:var(--warning)}
.status-final,.status-paid{background:var(--success-soft);color:var(--success)}
.status-unpaid{background:var(--danger-soft);color:#b91c1c}

.receipt-paper{width:100%;max-width:760px;margin:0 auto 16px;padding:22px;background:#fff;color:#111;
border:1px solid #e5e7eb;border-radius:4px;box-shadow:var(--shadow-sm)}
.receipt-header{margin-bottom:17px;padding-bottom:15px;border-bottom:1px dashed #bdbdbd;text-align:center}
.receipt-header img{display:block;max-width:72px;max-height:72px;margin:0 auto 8px;object-fit:contain}
.receipt-header h2{margin:0;padding:0;border:0;font-size:1.2rem;font-weight:800}
.receipt-header p{margin:2px 0;font-size:.8rem;color:#555}
.receipt-meta{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px;font-size:.82rem}
.receipt-meta>div:last-child{text-align:right}
.receipt-table{width:100%;margin-bottom:16px;border-collapse:collapse;font-size:.83rem}
.receipt-table th,.receipt-table td{padding:8px 5px;border-bottom:1px solid #ececec;text-align:left;vertical-align:top}
.receipt-table th{background:#fafafa;color:#333;font-weight:700}.receipt-table .text-right{text-align:right}
.receipt-table .item-description{display:block;margin-top:2px;color:#666;font-size:.75rem}
.receipt-summary{margin-top:8px;padding-top:10px;border-top:2px solid #111}
.summary-row{display:flex;justify-content:space-between;gap:15px;margin-bottom:5px;font-size:.84rem}
.summary-row.total{margin-top:9px;padding-top:9px;border-top:1px solid #ccc;font-size:1.08rem;font-weight:800}
.receipt-payment{margin-top:14px;padding:11px 12px;background:#f8fafc;border:1px solid #e5e7eb;border-radius:5px;font-size:.82rem}
.receipt-terms{margin-top:14px;padding-top:12px;border-top:1px solid #e5e7eb;white-space:pre-wrap;font-size:.76rem;color:#555}
.receipt-footer{margin-top:22px;padding-top:14px;border-top:1px dashed #bbb;color:#555;font-size:.78rem;text-align:center}
.receipt-final{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;
padding:9px 11px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:5px;color:#166534;font-size:.76rem;font-weight:700}
.integrity-box{margin-top:12px;padding:9px 10px;background:#fafafa;border:1px solid #e5e7eb;border-radius:5px;
color:#6b7280;font-size:.68rem;line-height:1.45;word-break:break-all}
.verification-panel{margin-top:14px;padding:13px;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-sm)}
.verification-panel h3{margin:0 0 8px;font-size:.85rem}.verification-panel p{margin:4px 0;color:var(--text-secondary);font-size:.78rem}

.history-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 0;border-bottom:1px solid var(--border)}
.history-item:last-child{border-bottom:0}.history-info{min-width:0}
.history-info h4{margin:0 0 3px;font-size:.9rem;font-weight:750}.history-info p{margin:2px 0;color:var(--text-muted);font-size:.76rem}
.history-total{color:var(--text);font-weight:750}.history-actions{display:flex;flex:0 0 auto;gap:6px}
.history-actions button{width:auto;min-height:36px;padding:6px 9px;font-size:.76rem}
.empty-state{padding:28px 14px;color:var(--text-muted);text-align:center}.empty-state strong{display:block;margin-bottom:5px;color:var(--text-secondary)}
.text-small{margin:0 0 10px;color:var(--text-muted);font-size:.78rem}.text-danger{margin-top:4px;color:var(--danger);font-size:.78rem}
.form-error{margin-top:5px;color:var(--danger);font-size:.78rem}
.notice{padding:11px 12px;border-radius:var(--radius-sm);font-size:.82rem}
.notice-info{background:var(--primary-soft);border:1px solid #bfdbfe;color:#1e40af}
.notice-success{background:var(--success-soft);border:1px solid #bbf7d0;color:#166534}
.notice-warning{background:var(--warning-soft);border:1px solid #fde68a;color:#92400e}
.notice-danger{background:var(--danger-soft);border:1px solid #fecaca;color:#991b1b}

.top-nav{position:sticky;top:0;z-index:100;display:flex;gap:6px;align-items:center;overflow-x:auto;white-space:nowrap;padding:8px max(12px,env(safe-area-inset-right)) 8px max(12px,env(safe-area-inset-left));background:rgba(255,255,255,.97);border-bottom:1px solid var(--border);box-shadow:0 2px 12px rgba(15,23,42,.05);backdrop-filter:blur(8px)}
.top-nav::-webkit-scrollbar{height:0}.top-nav{scrollbar-width:none}
.nav-btn{flex:1 0 auto;min-width:84px;min-height:42px;padding:7px 12px;background:transparent;border:0;border-radius:8px;color:var(--text-muted);font-size:.78rem;font-weight:700;cursor:pointer}
.nav-btn.active{background:var(--primary-soft);color:var(--primary)}.nav-btn.nav-primary{color:var(--primary)}
.logo-preview{display:block;width:80px;height:80px;margin-top:8px;object-fit:contain;background:var(--surface-soft);
border:1px solid var(--border);border-radius:var(--radius-sm)}

@media (min-width:640px){
  body{padding-bottom:0}.app-header{padding:18px 24px}
  .app-container{width:min(100% - 40px,var(--max-content));padding-top:24px}
  .card{padding:20px}.form-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .action-buttons{grid-template-columns:repeat(2,minmax(0,1fr))}
  .top-nav{width:min(100% - 40px,var(--max-content));margin:0 auto;padding:6px;border:1px solid var(--border);border-top:0;border-radius:0 0 var(--radius-md) var(--radius-md);box-shadow:var(--shadow-sm)}
  .nav-btn{min-height:40px;font-size:.82rem}
}
@media (min-width:800px){.app-container{width:min(100% - 56px,var(--max-content))}.receipt-paper{padding:28px}}
@media (max-width:380px){
  .app-container{width:min(100% - 18px,var(--max-content))}.card{padding:14px}.receipt-paper{padding:15px}
  .receipt-table{font-size:.76rem}.receipt-table th,.receipt-table td{padding:7px 3px}
  .top-nav{padding-left:8px;padding-right:8px}.nav-btn{font-size:.68rem;min-width:78px;padding-left:8px;padding-right:8px}
}

@page{size:A4;margin:10mm}
@media print{
  html,body{width:100%;min-width:0;margin:0;padding:0!important;background:#fff}
  body *{visibility:hidden!important}
  #receipt-preview-container,#receipt-preview-container *{visibility:visible!important}
  #receipt-preview-container{position:absolute!important;inset:0!important;width:100%!important;margin:0!important;padding:0!important;
  background:#fff!important;border:0!important;box-shadow:none!important}
  #receipt-preview-container>h2,#receipt-preview-container .action-buttons,#receipt-preview-container .no-print,
  .app-header,.top-nav{display:none!important}
  .receipt-paper{width:100%!important;max-width:none!important;margin:0!important;padding:0!important;border:0!important;
  border-radius:0!important;box-shadow:none!important}
  .receipt-final{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  .receipt-table tr,.receipt-summary,.receipt-payment,.receipt-terms,.receipt-footer{break-inside:avoid}
}