:root{--ness-primary:#4e73df;--ness-dark:#17223b;--ness-sidebar:#17223b;--ness-bg:#f4f6fb;--ness-muted:#7b8499}*{box-sizing:border-box}body{background:var(--ness-bg);color:#26324b;font-family:system-ui,-apple-system,"Segoe UI",sans-serif}.app-shell{display:flex;min-height:100vh}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:linear-gradient(180deg,#17223b,#20345f);color:#fff;z-index:1030;display:flex;flex-direction:column;transition:transform .25s}.brand{height:76px;display:flex;align-items:center;gap:12px;padding:0 22px;border-bottom:1px solid rgba(255,255,255,.1)}.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:#fff;color:var(--ness-primary);font-size:24px;font-weight:900;box-shadow:0 8px 22px rgba(0,0,0,.2)}.brand strong,.brand small{display:block}.brand small{opacity:.7;font-size:12px}.sidebar-nav{padding:18px 12px;flex:1}.sidebar-nav a{display:flex;align-items:center;gap:13px;color:rgba(255,255,255,.75);text-decoration:none;padding:12px 14px;border-radius:10px;margin-bottom:5px;font-weight:600}.sidebar-nav a:hover,.sidebar-nav a.active{color:#fff;background:rgba(255,255,255,.12)}.sidebar-nav i{font-size:19px;width:22px}.sidebar-footer{padding:20px 25px;border-top:1px solid rgba(255,255,255,.1);opacity:.7}.main-area{margin-left:250px;width:calc(100% - 250px);min-height:100vh;display:flex;flex-direction:column}.topbar{height:76px;background:#fff;display:flex;align-items:center;padding:0 28px;box-shadow:0 2px 14px rgba(31,45,90,.06);position:sticky;top:0;z-index:1020}.topbar-title{font-size:20px;font-weight:800}.user-button{display:flex;align-items:center;gap:10px;background:#f6f8fc;border:1px solid #e8ecf5}.avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--ness-primary);color:#fff;font-weight:800}.content-area{padding:28px;flex:1}.footer{padding:18px 28px;background:#fff;border-top:1px solid #e8ecf5;font-size:13px;color:var(--ness-muted)}.metric-card{background:#fff;border-radius:12px;padding:22px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 6px 24px rgba(31,45,90,.07);height:100%}.metric-card span{display:block;color:var(--ness-muted);font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:.4px}.metric-card strong{display:block;font-size:30px;margin-top:5px}.metric-card>i{font-size:38px;color:#ccd3e4}.card{border-radius:12px}.card-header{padding:18px 20px;border-color:#edf0f6}.table thead th{font-size:12px;text-transform:uppercase;letter-spacing:.45px;color:#6f7890;background:#fafbfe;border-bottom-width:1px}.table td,.table th{padding:14px 16px}.status-dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:7px;background:#b7bdc9}.status-dot.ok{background:#1cc88a}.status-dot.bad{background:#e74a3b}.status-dot.idle{background:#f6c23e}.login-page{min-height:100vh;display:grid;place-items:center;padding:25px;background:radial-gradient(circle at top right,#e4eaff,transparent 40%),linear-gradient(135deg,#17223b,#3150a3)}.login-card{width:100%;max-width:430px;background:#fff;border-radius:20px;padding:36px}.login-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}.login-brand h1{font-size:25px;margin:0;font-weight:900}.login-brand p{margin:2px 0 0;color:var(--ness-muted)}.login-help{text-align:center;margin-top:20px;font-size:13px}.form-control,.form-select{border-radius:9px;min-height:42px;border-color:#dfe4ee}.btn{border-radius:9px}.btn-primary{background:var(--ness-primary);border-color:var(--ness-primary)}code{color:#c7254e;background:#f9f2f4;padding:2px 5px;border-radius:4px}@media(max-width:991.98px){.sidebar{transform:translateX(-100%)}.sidebar.show{transform:translateX(0)}.main-area{margin-left:0;width:100%}.content-area{padding:20px}.topbar{padding:0 18px}}
.nav-caption{padding:14px 18px 5px;font-size:.68rem;text-transform:uppercase;letter-spacing:.09em;color:rgba(255,255,255,.48);font-weight:700}.amount-lg{font-size:1.55rem;font-weight:800}.table-actions{white-space:nowrap}.invoice-total-box{background:#f7f9fc;border-radius:12px;padding:18px}.print-only{display:none}@media print{.sidebar,.topbar,.no-print,.btn{display:none!important}.main-area,.content-area{margin:0!important;padding:0!important}.print-only{display:block}.card{box-shadow:none!important;border:0!important}}

/* V3: sidebar completo, desplazable y retráctil */
.sidebar{overflow:hidden}.brand{flex:0 0 76px}.sidebar-nav{flex:1 1 auto;min-height:0;overflow-y:auto;overflow-x:hidden;overscroll-behavior:contain;padding-bottom:28px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.25) transparent}.sidebar-nav::-webkit-scrollbar{width:7px}.sidebar-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.22);border-radius:8px}.sidebar-nav::-webkit-scrollbar-track{background:transparent}.sidebar-footer{flex:0 0 auto}.sidebar-toggle{display:inline-flex;align-items:center;justify-content:center;margin-right:10px;text-decoration:none}.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(8,18,40,.46);z-index:1025}.sidebar-backdrop.show{display:block}.sidebar,.main-area,.brand-copy,.sidebar-nav a span,.sidebar-footer{transition:width .25s,margin .25s,opacity .18s,transform .25s}.sidebar-nav a{min-height:46px}

@media(min-width:992px){body.sidebar-collapsed .sidebar{width:84px}body.sidebar-collapsed .main-area{margin-left:84px;width:calc(100% - 84px)}body.sidebar-collapsed .brand{justify-content:center;padding-left:0;padding-right:0}body.sidebar-collapsed .brand-copy,body.sidebar-collapsed .sidebar-nav a span,body.sidebar-collapsed .nav-caption,body.sidebar-collapsed .sidebar-footer{display:none}body.sidebar-collapsed .sidebar-nav{padding-left:12px;padding-right:12px}body.sidebar-collapsed .sidebar-nav a{justify-content:center;padding-left:10px;padding-right:10px}body.sidebar-collapsed .sidebar-nav i{width:auto;font-size:21px}body.sidebar-collapsed .sidebar-nav a.active{box-shadow:inset 3px 0 0 rgba(255,255,255,.9)}}

@media(max-width:991.98px){body.sidebar-open{overflow:hidden}.sidebar{width:min(290px,86vw);box-shadow:18px 0 48px rgba(5,15,35,.28)}.sidebar.show{transform:translateX(0)}.sidebar-toggle{margin-left:-8px}.topbar-title{font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-nav{padding-bottom:36px}}

/* V4: menú completo y campo de notificación en login */
.sidebar-nav{min-height:0;max-height:calc(100vh - 150px);overflow-y:auto!important;overflow-x:hidden!important;padding-bottom:34px!important}
.sidebar-nav .nav-caption{position:relative}
.notification-placement-box{padding:16px 18px;border:1px solid #dce5f2;border-radius:12px;background:#f7f9fd}
@media(max-width:991.98px){.sidebar-nav{max-height:calc(100vh - 130px)}}