:root{--font-sans:'Inter',-apple-system,sans-serif;--font-mono:'JetBrains Mono',monospace;--radius:12px;--transition:0.2s ease}
[data-theme="dark"]{--bg:#0F0F1A;--bg-card:rgba(26,26,46,0.95);--bg-input:rgba(99,102,241,0.05);--border:rgba(99,102,241,0.12);--text:#E8E4F0;--text2:#A0A0C0;--text3:#6060A0;--primary:#6366F1;--accent:#10B981;--gradient:linear-gradient(135deg,#6366F1,#8B5CF6)}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh}
.app{max-width:780px;margin:0 auto}.header{padding:16px 24px;border-bottom:1px solid var(--border)}
.header h1{font-size:1rem;font-weight:700;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn{font-family:var(--font-sans);font-size:.82rem;font-weight:500;padding:8px 16px;border-radius:8px;border:none;cursor:pointer;transition:all var(--transition)}
.btn-primary{background:var(--gradient);color:#fff}.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text2)}.btn-ghost:hover{background:var(--bg-input)}
.main{padding:24px}.invoice-form{display:flex;flex-direction:column;gap:14px}
.label{font-size:.72rem;font-weight:600;color:var(--text3);margin-bottom:4px;display:block;text-transform:uppercase;letter-spacing:.04em}
.field{margin-bottom:4px}
input[type="text"],input[type="date"],input[type="number"],textarea{width:100%;padding:8px;background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:6px;font-family:var(--font-sans);font-size:.82rem;outline:none;resize:vertical}
input:focus,textarea:focus{border-color:var(--primary)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
h3{font-size:.85rem;font-weight:600;color:var(--text2)}
.items-table{width:100%;border-collapse:collapse;font-size:.82rem}
.items-table th{text-align:left;padding:8px;font-size:.72rem;font-weight:600;color:var(--text3);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.04em}
.items-table td{padding:6px 8px;border-bottom:1px solid var(--border)}
.items-table input{width:100%;padding:6px;background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:4px;font-size:.82rem;outline:none}
.items-table .del-btn{background:none;border:none;color:var(--text3);cursor:pointer;font-size:.9rem}.del-btn:hover{color:#EF4444}
.totals{text-align:right;margin-top:10px}.total-row{display:flex;justify-content:flex-end;gap:20px;padding:4px 0;font-size:.85rem;color:var(--text2)}
.total-final{font-size:1.1rem;font-weight:700;color:var(--accent);padding-top:8px;border-top:1px solid var(--border)}
.actions{display:flex;gap:8px}
@media print{.header,.actions,.btn{display:none!important}body{background:#fff;color:#000}.app{max-width:100%}input,textarea,select{border:none!important;background:none!important;color:#000!important;padding:2px!important}.items-table th,.items-table td{border-color:#ccc!important}}
@media(max-width:500px){.row2{grid-template-columns:1fr}}