:root{--bg:#f8fafc;--card:#fff;--muted:#6b7280;--accent:#ff385c}
body{font-family:Inter,system-ui,Arial,sans-serif;background:var(--bg);color:#0f172a;margin:0}
.container{max-width:1100px;margin:2rem auto;padding:1rem}
.panel{background:transparent}
.grid{display:grid;grid-template-columns:minmax(420px, 0.9fr) 1.2fr;gap:1rem}
.form{background:var(--card);padding:1rem;border-radius:10px;box-shadow:0 6px 18px rgba(15,23,42,0.06)}
.form label{display:block;font-size:.95rem;font-weight:600;color:#111827;margin-top:1rem}
.form .row label{margin-top:0}
.preview{position:sticky;top:1rem}
body.preview-expanded{overflow:hidden}
body.preview-expanded .form{display:none}
.preview.fullscreen{position:fixed;top:0;left:0;right:0;bottom:0;width:100vw;height:100vh;z-index:999;padding:20px;overflow:auto;background:var(--bg);}
.preview.fullscreen .invoice-card{border-radius:0;border:none;box-shadow:none;width:auto;min-height:calc(100vh - 120px);}
.preview.fullscreen .preview-controls{position:sticky;bottom:0;background:rgba(248,250,252,0.95);padding:12px 0;display:flex;gap:8px;}
.preview.fullscreen .preview-controls .btn{flex:1;}
.form label:first-child{margin-top:0}
.form label input,
.form label textarea,
.form label select{width:100%;display:block;margin-top:.5rem;padding:.75rem .85rem;border:1px solid #d1d5db;border-radius:.75rem;background:#fff;color:#111827;font:inherit}
.form label textarea{min-height:3rem}
input,textarea,select{width:100%;padding:0.75rem .85rem;border:1px solid #d1d5db;border-radius:10px;margin-top:0.5rem;background:#fff;color:#111827;font:inherit}
h1,h2,h3{margin:0 0 8px}
.muted{color:var(--muted)}
.row.two{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.row.three{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.btn{display:inline-block;padding:8px 12px;border-radius:8px;background:#fff;border:1px solid #e6edf3;cursor:pointer;margin-top:8px}
.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.muted{background:transparent;color:var(--muted)}
.invoice-card{background:#fff;padding:16px;border-radius:8px;border:1px solid #e6edf3}
.invoice-card .invoice-header{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-top:0;padding-bottom:16px;border-bottom:1px solid #f1f5f9}
.invoice-card .invoice-left{display:flex;gap:12px;align-items:center}
.invoice-card .invoice-left .logo{width:80px;height:80px;background:#f1f5f9;border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.invoice-card .invoice-left .logo img{max-width:100%;max-height:100%;object-fit:contain}
.invoice-card .invoice-left h2{margin:0;font-size:1.25rem}
.invoice-card .invoice-right{text-align:right;font-size:.95rem;line-height:1.6}
.invoice-card .invoice-right .invoice-title{font-size:2rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.invoice-card .invoice-contact{margin-top:8px}
.invoice-info{display:flex;justify-content:space-between;gap:16px;margin-top:18px}
.bill-to, .invoice-meta{width:100%;padding:14px;background:#f8fafc;border-radius:12px}
.invoice-meta{display:grid;gap:8px}
.items{width:100%;border-collapse:collapse;margin-top:18px}
.items td,.items th{padding:12px;border-bottom:1px solid #f1f5f9;text-align:left}
.items th{background:#f8fafc;font-weight:600}
.items td:last-child, .items th:last-child{text-align:right}
.totals{margin-top:18px;display:grid;gap:10px;padding:14px;background:#f8fafc;border-radius:12px}
.totals div{display:flex;justify-content:space-between}
.payment-instructions{margin-top:18px;padding:14px;background:#f8fafc;border-radius:12px;font-size:.95rem;line-height:1.6}
.payment-link{margin-top:18px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.payment-link a{color:#0f172a;text-decoration:none;font-weight:700;border:1px solid #e6edf3;padding:10px 14px;border-radius:10px;background:#fff}
.preview-controls{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.logo-preview img{height:48px}
.line-item{display:flex;gap:8px;margin-top:8px}
.line-item input{width:50%}
@media (max-width:900px){.grid{grid-template-columns:1fr;}.preview{position:static}.invoice-info{flex-direction:column}.invoice-right{text-align:left}}