:root{
  --blue:#0055A4;--blue-dark:#003C75;--blue-light:#EAF3FB;
  --green:#49B83E;--green-dark:#2E8E29;--green-light:#DDF3D8;
  --red:#C83C3C;--orange:#D98200;--bg:#F4F7FA;--text:#15324F;
  --muted:#678096;--white:#fff;--border:#D5E0E9;--shadow:0 12px 30px rgba(0,50,90,.12)
}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--text);background:var(--bg)}
button,input,select,textarea{font:inherit}button{cursor:pointer}
.hidden{display:none!important}.wide{width:100%}
.btn{border:0;border-radius:8px;padding:.78rem 1rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
.btn.primary{background:var(--blue);color:#fff}.btn.primary:hover{background:var(--blue-dark)}
.btn.success{background:var(--green);color:#fff}.btn.secondary{background:#E4EDF4;color:var(--blue)}
.btn.small{padding:.5rem .8rem;font-size:.85rem}.notice{padding:1rem;border-radius:8px;margin:1rem 0}.notice.error{background:#FDEAEA;color:#8C1E1E}.notice.success{background:#E5F6E2;color:#216B1D}
.login-page,.install-page{min-height:100vh;display:grid;place-items:center;padding:1rem;background:linear-gradient(145deg,var(--blue-light),var(--green-light))}
.login-card,.install-card{width:min(520px,100%);background:#fff;border-radius:18px;padding:2rem;box-shadow:var(--shadow)}
.login-logo,.install-logo{display:block;width:110px;margin:0 auto 1rem}.login-card h1,.install-card h1{text-align:center;color:var(--blue);margin:.3rem 0}.login-card>p,.install-card>p{text-align:center;color:var(--muted)}
label{display:flex;flex-direction:column;gap:.35rem;font-weight:650;color:var(--blue);font-size:.9rem}
input,select,textarea{width:100%;border:1px solid var(--border);border-radius:7px;padding:.75rem;background:#fff;color:var(--text)}
textarea{min-height:85px;resize:vertical}input:focus,select:focus,textarea:focus{outline:3px solid rgba(0,85,164,.14);border-color:var(--blue)}
.login-card form{display:grid;gap:1rem;margin-top:1.5rem}
.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.sidebar{position:sticky;top:0;height:100vh;background:var(--green-light);border-right:1px solid #BFDDBA;padding:1rem;display:flex;flex-direction:column;z-index:30}
.brand{display:flex;align-items:center;gap:.8rem;padding:.3rem .2rem 1rem}.brand img{width:52px}.brand strong{display:block;color:var(--blue)}.brand small{color:var(--muted)}
.sidebar nav{display:grid;gap:.35rem}.sidebar nav button{border:0;background:transparent;color:var(--blue);text-align:left;padding:.8rem;border-radius:8px;font-weight:700}
.sidebar nav button:hover,.sidebar nav button.active{background:#fff;box-shadow:0 4px 14px rgba(0,70,130,.08)}
.logout-button{margin-top:auto;border:0;background:transparent;color:#8C1E1E;text-align:left;padding:.8rem;font-weight:700}
.main-area{min-width:0}.topbar{height:78px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:1rem;padding:0 1.4rem;position:sticky;top:0;z-index:20}
.topbar h1{margin:0;color:var(--blue);font-size:1.35rem}.topbar small{color:var(--muted)}#menu-button{display:none;border:0;background:var(--blue-light);color:var(--blue);border-radius:8px;padding:.6rem;font-size:1.25rem}
#install-button{margin-left:auto}.content{padding:1.3rem;max-width:1500px;margin:0 auto}
.stats-grid{display:grid;grid-template-columns:repeat(5,minmax(150px,1fr));gap:1rem}.stats-grid article{background:#fff;padding:1.2rem;border-radius:12px;border-top:5px solid var(--blue);box-shadow:0 5px 18px rgba(0,40,80,.06)}
.stats-grid span{display:block;color:var(--muted);font-size:.9rem}.stats-grid strong{display:block;color:var(--blue);font-size:1.7rem;margin-top:.35rem}
.panel{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1rem;margin:1rem 0;box-shadow:0 4px 16px rgba(0,40,80,.04)}.panel h2{margin:.1rem 0 1rem;color:var(--blue)}
.action-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem}.page-actions,.panel-title{display:flex;gap:.8rem;align-items:center;justify-content:space-between;margin-bottom:1rem}.page-actions input{max-width:420px}.panel-title h2{margin:0}
.table-wrap{overflow:auto;border:1px solid var(--border);border-radius:9px}.data-table{width:100%;border-collapse:collapse;min-width:760px}.data-table th{background:var(--blue);color:#fff;text-align:left;padding:.8rem;white-space:nowrap}.data-table td{padding:.75rem;border-bottom:1px solid var(--border);vertical-align:middle}.data-table tbody tr:hover{background:#F4F9FD}.data-table small{display:block;color:var(--muted);margin-top:.2rem}
.badge{display:inline-block;padding:.3rem .55rem;border-radius:999px;font-size:.78rem;font-weight:700}.badge.green{background:#DDF3D8;color:#246F20}.badge.gray{background:#E8EDF1;color:#536575}.badge.orange{background:#FFF0D5;color:#8A5200}
.icon-btn{border:0;background:var(--blue-light);color:var(--blue);padding:.4rem .55rem;border-radius:6px;text-decoration:none;font-size:.82rem;font-weight:700}.icon-btn.whatsapp{background:#DDF8E6;color:#137A34}
.empty,.loading{text-align:center;padding:2rem;color:var(--muted)}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.form-grid .span-2{grid-column:1/-1}.form-actions{display:flex;justify-content:flex-end}.check{flex-direction:row;align-items:center;color:var(--text)}.check input{width:auto}
.modal-backdrop{position:fixed;inset:0;background:rgba(0,30,55,.55);display:grid;place-items:center;padding:1rem;z-index:100}.modal{width:min(850px,100%);max-height:92vh;overflow:auto;background:#fff;border-radius:14px;box-shadow:var(--shadow)}.modal header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.2rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:1}.modal header h2{margin:0;color:var(--blue)}.modal-close{border:0;background:transparent;font-size:1.8rem;color:var(--muted)}.modal-body{padding:1.2rem}
.inline-form{display:grid;grid-template-columns:2fr .6fr .8fr auto;gap:.7rem}.tariff-preview{background:var(--blue-light);padding:.8rem;border-radius:8px;color:var(--blue)}
.bottom-nav{display:none}.toast{position:fixed;right:1rem;bottom:1rem;background:var(--blue);color:#fff;padding:1rem 1.2rem;border-radius:10px;opacity:0;transform:translateY(20px);transition:.2s;z-index:200}.toast.error{background:var(--red)}.toast.show{opacity:1;transform:translateY(0)}
.fatal{margin:2rem;padding:2rem;background:#FDEAEA;color:#8C1E1E;border-radius:10px}
.receipt-page{padding:1rem;background:#eef2f5}.receipt{max-width:780px;margin:auto;background:#fff;padding:2rem;box-shadow:var(--shadow)}.receipt header{display:flex;gap:1rem;border-bottom:2px solid var(--blue);padding-bottom:1rem}.receipt header img{width:85px}.receipt header h1{color:var(--blue);margin:0}.receipt header p{margin:.2rem 0}.receipt-title{display:flex;justify-content:space-between;align-items:center}.receipt table{width:100%;border-collapse:collapse;margin:1.2rem 0}.receipt th,.receipt td{border:1px solid #ccc;padding:.7rem}.receipt th{text-align:left;background:var(--blue-light)}.receipt footer{text-align:center;color:var(--muted);margin-top:2rem}.receipt-actions{display:flex;gap:.7rem;justify-content:center;margin:1rem}
.install-card{max-width:760px}.install-card h2{color:var(--blue);margin-top:1.6rem}
@media(max-width:1050px){.stats-grid{grid-template-columns:repeat(2,1fr)}.action-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){
 body{padding-bottom:68px}.app-shell{display:block}.sidebar{position:fixed;left:-280px;width:260px;transition:.2s;box-shadow:var(--shadow)}.sidebar.open{left:0}.topbar{height:68px;padding:0 .8rem}#menu-button{display:block}.content{padding:.8rem}.stats-grid{grid-template-columns:1fr 1fr;gap:.7rem}.stats-grid article{padding:.9rem}.stats-grid strong{font-size:1.35rem}.action-grid{grid-template-columns:1fr}.page-actions{align-items:stretch}.page-actions input{max-width:none}.form-grid{grid-template-columns:1fr}.form-grid .span-2{grid-column:auto}.inline-form{grid-template-columns:1fr 1fr}.inline-form select,.inline-form button{grid-column:1/-1}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:64px;background:#fff;border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(5,1fr);z-index:25}.bottom-nav button{border:0;background:#fff;color:var(--blue);font-size:.72rem;font-weight:700}.bottom-nav button.active{background:var(--blue-light)}.modal-backdrop{padding:.4rem}.modal{max-height:96vh}.modal-body{padding:.9rem}.receipt{padding:1rem}.receipt header{flex-direction:column}.receipt-title{display:block}
}
@media print{.receipt-actions{display:none}.receipt-page{background:#fff;padding:0}.receipt{box-shadow:none;max-width:none}}