:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --text: #172033;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-2: #1d4ed8;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #dc2626;
  --dark-1: #0f172a;
  --dark-2: #172554;
  --border: #e2e8f0;
  --shadow: 0 14px 34px rgba(15, 23, 42, 0.08);
  --radius: 18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;min-height:100%}
body{font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.45}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.container-fluid{width:100%;padding:0}
.row{display:flex;flex-wrap:wrap;margin:-12px}
.row>*{padding:12px;width:100%}
.col-md,.col-lg-4,.col-lg-5,.col-lg-6,.col-lg-7,.col-lg-8{width:100%}
@media(min-width:768px){.col-md{width:20%}}
@media(min-width:992px){.col-lg-4{width:33.3333%}.col-lg-5{width:41.6667%}.col-lg-6{width:50%}.col-lg-7{width:58.3333%}.col-lg-8{width:66.6667%}}
.g-0{margin:0}.g-0>*{padding:0}.g-3{margin:-10px}.g-3>*{padding:10px}.g-4{margin:-12px}.g-4>*{padding:12px}
.mb-2{margin-bottom:.75rem}.mb-3{margin-bottom:1rem}.mb-4{margin-bottom:1.25rem}.mt-4{margin-top:1.25rem}.mt-auto{margin-top:auto}.w-100{width:100%}.small{font-size:.875rem}
.shadow-sm{box-shadow:var(--shadow)}
.text-muted{color:var(--muted)!important}.fw-bold{font-weight:800}.strong{font-weight:700}.fs-4{font-size:1.85rem}
.app-shell{min-height:100vh}
.sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;background:linear-gradient(180deg,var(--dark-1),var(--dark-2));color:#fff;z-index:1000}
.sidebar-inner{height:100%;display:flex;flex-direction:column;padding:24px 18px;gap:24px}
.brand-block,.sidebar-user{display:flex;align-items:center;gap:12px}
.brand-icon,.user-avatar{width:46px;height:46px;border-radius:14px;background:rgba(255,255,255,.12);display:grid;place-items:center;font-weight:800}
.brand-title,.user-name{font-weight:800;font-size:1rem}
.brand-subtitle,.user-role{font-size:.88rem;color:rgba(255,255,255,.74)}
.sidebar-nav{display:flex;flex-direction:column;gap:8px}
.nav-item-link{padding:12px 14px;border-radius:14px;color:rgba(255,255,255,.84);font-weight:600;display:block}
.nav-item-link:hover,.nav-item-link.active{background:rgba(255,255,255,.12);color:#fff}
.main-content{min-height:100vh;padding:20px}
@media(min-width:992px){.main-content{margin-left:280px;padding:28px}}
.topbar{background:rgba(255,255,255,.94);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);padding:18px 22px;display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:24px}
.topbar-left{display:flex;align-items:center;gap:14px}
.topbar-title{font-size:2rem;font-weight:800;line-height:1.1;margin:0}
.topbar-subtitle{color:var(--muted);margin-top:6px}
.menu-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--border);background:#fff;font-size:22px;cursor:pointer}
.card,.form-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-header{padding:16px 20px;border-bottom:1px solid var(--border);font-weight:800;background:transparent}
.card-body,.form-section{padding:20px}
.card-stat{position:relative;overflow:hidden}
.card-stat::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:rgba(37,99,235,.08)}
.card-stat .text-muted.small{font-size:.88rem}.card-stat .fs-4{margin-top:8px}
.page-title{font-size:1.5rem;font-weight:800;margin:0 0 4px}.page-subtitle{color:var(--muted);margin:0}
.form-label{display:block;font-size:.92rem;font-weight:700;color:#334155;margin-bottom:6px}
.form-control,.form-select,textarea{display:block;width:100%;min-height:46px;border:1px solid #d7deea;border-radius:12px;padding:10px 14px;background:#fff;color:var(--text);outline:none}
textarea.form-control{min-height:100px}
.form-control:focus,.form-select:focus,textarea:focus{border-color:rgba(37,99,235,.65);box-shadow:0 0 0 4px rgba(37,99,235,.08)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:12px;border:1px solid transparent;font-weight:700;cursor:pointer}
.btn-sm{padding:8px 12px;font-size:.875rem}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}.btn-secondary{background:#64748b;color:#fff}.btn-success{background:var(--success);color:#fff}.btn-warning{background:#fbbf24;color:#111827}.btn-danger{background:var(--danger);color:#fff}.btn-outline-secondary{background:#fff;border-color:var(--border);color:#334155}
.table-responsive{overflow:auto}.table{width:100%;border-collapse:collapse}.table thead th{font-size:.84rem;text-transform:uppercase;letter-spacing:.03em;color:#475569;border-bottom:1px solid var(--border);padding:14px 10px;text-align:left;white-space:nowrap}.table tbody td{padding:14px 10px;border-bottom:1px solid #edf2f7}.table-striped tbody tr:nth-child(odd){background:#f8fbff}.table-hover tbody tr:hover,.table tbody tr:hover{background:rgba(37,99,235,.03)}
.alert{padding:14px 16px;border-radius:16px;margin-bottom:16px}.alert-success{background:#ecfdf5;color:#166534;border:1px solid #bbf7d0}.alert-danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.alert-info{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe}
.login-page{min-height:100vh;background:radial-gradient(circle at top left, rgba(37,99,235,.18), transparent 32%),radial-gradient(circle at bottom right, rgba(14,165,233,.18), transparent 34%),linear-gradient(135deg, #eef4ff, #f8fbff 50%, #eef2ff);display:grid;place-items:center;padding:24px}
.login-wrap{width:min(1120px,100%);background:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.7);border-radius:32px;box-shadow:0 24px 60px rgba(15,23,42,.12);overflow:hidden}
.login-left{background:linear-gradient(160deg,#0f172a,#1d4ed8 55%,#38bdf8);color:#fff;padding:56px 48px;height:100%}
.login-badge{display:inline-flex;align-items:center;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.14);font-size:.875rem;margin-bottom:22px}
.login-left h1{font-size:clamp(2rem,4vw,3.1rem);font-weight:800;margin:0 0 12px}.login-left p{color:rgba(255,255,255,.84);font-size:1.05rem;margin-bottom:26px}.login-features{display:grid;gap:14px}.login-feature{display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.96)}
.login-check{width:32px;height:32px;border-radius:10px;background:rgba(255,255,255,.14);display:grid;place-items:center;font-weight:800}
.login-right{padding:52px 40px}.login-panel{max-width:484px;margin:0 auto}.login-logo{width:54px;height:54px;border-radius:16px;background:rgba(37,99,235,.08);color:var(--primary);display:grid;place-items:center;font-weight:800;margin:0 auto 18px}.login-panel h2{text-align:center;font-size:2rem;font-weight:800;margin:0 0 6px}.login-panel p{text-align:center;color:var(--muted);margin:0 0 28px}.default-login-box{margin-top:22px;padding:16px 18px;border-radius:16px;background:#f8fbff;border:1px dashed #c7d7ff}.default-login-box .title{font-weight:800}
.mobile-sidebar,.mobile-overlay{display:none}
.status-badge{display:inline-block;padding:6px 10px;border-radius:999px;font-size:.8rem;font-weight:700}
.status-Paid{background:#dcfce7;color:#166534}.status-Pending,.status-Partial{background:#fef3c7;color:#92400e}.status-Overdue{background:#fee2e2;color:#991b1b}.status-Active{background:#dbeafe;color:#1d4ed8}.status-Inactive,.status-Suspended{background:#e5e7eb;color:#374151}
@media(max-width:991.98px){.sidebar{display:none}.main-content{padding:16px}.menu-toggle{display:inline-flex;align-items:center;justify-content:center}.topbar{padding:16px;border-radius:18px}.topbar-title{font-size:1.4rem}.login-left{display:none}.login-right{padding:32px 22px}.login-wrap{border-radius:24px}.mobile-overlay{position:fixed;inset:0;background:rgba(15,23,42,.45);z-index:1090}.mobile-sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;background:linear-gradient(180deg,var(--dark-1),var(--dark-2));color:#fff;z-index:1100;padding:24px 18px;transform:translateX(-100%);transition:.25s ease}.mobile-sidebar.open{transform:translateX(0)}.mobile-overlay.open,.mobile-sidebar.open{display:block}.mobile-close{background:rgba(255,255,255,.1);border:none;color:#fff;border-radius:10px;width:38px;height:38px;cursor:pointer}.mobile-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}}
@media(max-width:575.98px){.topbar{flex-direction:column;align-items:flex-start}.btn,.form-control,.form-select{min-height:44px}.page-title{font-size:1.25rem}}