:root{--ink: #17151d;--ink-soft: #373341;--paper: #f8faf8;--surface: #ffffff;--mat: #d9e5e0;--rail: #edf3ec;--line: #aebeb5;--muted: #66746f;--acid: #e8ff57;--cyan: #00a7b5;--coral: #ff5c39;--radius: 8px;--shadow-hard: 10px 10px 0 rgba(23, 21, 29, .18)}*{box-sizing:border-box}html{min-height:100%;overflow-x:hidden;background:var(--mat);color:var(--ink);font-family:Aptos,Segoe UI,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,sans-serif}body{min-height:100vh;margin:0;overflow-x:hidden}button,input,textarea{font:inherit}button{cursor:pointer}.tool-shell{min-height:100vh;display:grid;grid-template-columns:minmax(330px,450px) minmax(0,1fr);overflow-x:hidden;background:linear-gradient(90deg,rgba(23,21,29,.08) 1px,transparent 1px),linear-gradient(0deg,rgba(23,21,29,.06) 1px,transparent 1px),var(--mat);background-size:42px 42px}.controls{min-width:0;min-height:100vh;height:100vh;overflow:auto;padding:22px;border-right:2px solid var(--ink);background:linear-gradient(90deg,rgba(232,255,87,.18) 0 1px,transparent 1px 100%),var(--rail);background-size:22px 22px;position:sticky;top:0}.brand{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:start;padding-bottom:18px;border-bottom:2px solid var(--ink)}.kicker,label,.button.secondary,.section-title,.invoice-label,th,.total-row span{font-family:SFMono-Regular,Cascadia Code,Roboto Mono,ui-monospace,monospace}.kicker{width:max-content;padding:4px 8px;border:1px solid var(--ink);background:var(--acid);font-size:.72rem;font-weight:900;text-transform:uppercase}h1{margin:10px 0 0;font-family:Impact,Haettenschweiler,Arial Narrow Bold,sans-serif;font-size:clamp(3rem,10vw,4.9rem);line-height:.84;letter-spacing:0;text-transform:uppercase}.back-link{display:inline-flex;align-items:center;min-height:38px;padding:8px 10px;border:1px solid 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var(--ink);border-radius:var(--radius);background:var(--surface);color:var(--ink);font-weight:900}.icon-button:hover:not(:disabled),.icon-button:focus-visible:not(:disabled){transform:translate(-2px,-2px);box-shadow:3px 3px 0 var(--coral)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding-top:18px;border-top:2px solid var(--ink)}.button{min-height:46px;border:1px solid var(--ink);border-radius:var(--radius);background:var(--ink);color:var(--paper);font-weight:900}.button.secondary{background:var(--surface);color:var(--ink);font-size:.74rem;text-transform:uppercase}.preview-area{min-width:0;padding:clamp(20px,4vw,44px)}.invoice{width:min(900px,100%);margin:0 auto;border:2px solid var(--ink);background:var(--surface);box-shadow:var(--shadow-hard)}.invoice-top{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:18px;padding:24px;border-bottom:2px solid var(--ink);background:linear-gradient(90deg,rgba(232,255,87,.28) 0 1px,transparent 1px 100%),var(--paper);background-size:22px 22px}.invoice-title{margin:0;font-family:Impact,Haettenschweiler,Arial Narrow Bold,sans-serif;font-size:clamp(3rem,8vw,5.4rem);line-height:.84;letter-spacing:0;text-transform:uppercase}.invoice-number{min-width:132px;padding:12px;border:2px solid var(--ink);background:var(--acid);text-align:right}.invoice-label{display:block;color:var(--muted);font-size:.7rem;font-weight:900;text-transform:uppercase}.invoice-body{display:grid;gap:24px;padding:24px}.parties{display:grid;grid-template-columns:1fr 1fr;gap:18px}.party{min-height:120px;padding:14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}.party h2{margin:0 0 8px;font-size:1rem}.party p{margin:0;color:var(--ink-soft);line-height:1.45;white-space:pre-wrap}table{width:100%;border-collapse:collapse}th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left}th{color:var(--muted);font-size:.7rem;text-transform:uppercase}td:nth-child(2),td:nth-child(3),td:nth-child(4),th:nth-child(2),th:nth-child(3),th:nth-child(4){text-align:right}.totals{width:min(330px,100%);display:grid;gap:8px;margin-left:auto}.total-row{display:flex;justify-content:space-between;gap:18px;padding:8px 0;border-bottom:1px solid var(--line)}.total-row.grand{padding:12px;border:2px solid var(--ink);background:var(--acid);font-size:1.2rem;font-weight:900}.notes{color:var(--muted);line-height:1.45}@media(max-width:880px){.tool-shell{grid-template-columns:1fr}.controls{position:static;height:auto;min-height:0;border-right:0;border-bottom:2px solid var(--ink)}}@media(max-width:620px){h1{font-size:3rem}.brand,.invoice-top,.parties,.actions,.field-grid{grid-template-columns:1fr}.item-row{grid-template-columns:1fr 1fr auto}.item-row .field:first-child{grid-column:1 / -1}th:nth-child(2),td:nth-child(2){display:none}}@media print{body{background:#fff}.controls{display:none}.tool-shell{display:block;background:#fff}.preview-area{padding:0}.invoice{width:100%;min-height:100vh;border:0;box-shadow:none}}