:root{--fondo: #0f172a;--superficie: #1e293b;--borde: #334155;--texto: #e2e8f0;--tenue: #94a3b8;--acento: #38bdf8;--exito: #22c55e;--error: #f87171}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:var(--fondo);color:var(--texto);line-height:1.5}header{padding:2rem 1.5rem 1rem;text-align:center}h1{margin:0;font-size:2rem;letter-spacing:-.02em}.subtitulo{margin:.25rem 0 0;color:var(--tenue)}main{max-width:960px;margin:0 auto;padding:1rem 1.5rem 3rem;display:grid;gap:1.25rem}.tarjeta{background:var(--superficie);border:1px solid var(--borde);border-radius:12px;padding:1.25rem}h2{margin:0 0 .75rem;font-size:1.15rem}form{display:flex;flex-wrap:wrap;gap:.75rem;align-items:flex-end;margin-bottom:.75rem}label{display:flex;flex-direction:column;gap:.25rem;font-size:.85rem;color:var(--tenue)}input,select{background:var(--fondo);border:1px solid var(--borde);border-radius:8px;color:var(--texto);padding:.45rem .6rem;font:inherit}button{background:var(--acento);border:none;border-radius:8px;color:#0b1220;cursor:pointer;font:inherit;font-weight:600;padding:.5rem 1rem}button:hover{filter:brightness(1.1)}.cobrar{background:var(--exito)}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{border-bottom:1px solid var(--borde);padding:.45rem .5rem;text-align:left}th{color:var(--tenue);font-weight:500}.aviso{min-height:1.25rem;margin:.5rem 0 0;color:var(--exito)}.aviso.error{color:var(--error)}.vacio{color:var(--tenue);margin:0}.resumen ul{margin:.5rem 0 0;padding-left:1.25rem;color:var(--tenue)}footer{text-align:center;color:var(--tenue);font-size:.8rem;padding-bottom:2rem}