/* ================================================
   HEALSTRIX ENTERPRISE BILLING — DESIGN SYSTEM
   v3.0 | Compact | Professional | Data-Dense
   ================================================ */

:root {
    --primary:       #1a6b3c;
    --primary-dark:  #145530;
    --primary-light: #e8f5ee;
    --accent:        #0f5ca8;
    --accent-light:  #e8f0fb;
    --danger:        #c0392b;
    --danger-light:  #fdf0ef;
    --warning:       #d68910;
    --warning-light: #fef9ec;
    --purple:        #6c3483;
    --purple-light:  #f5eef8;

    --bg:            #f0f2f5;
    --surface:       #ffffff;
    --border:        #d8dde6;
    --border-light:  #e8ecf0;

    --text-primary:  #1a1f2e;
    --text-secondary:#5a6475;
    --text-muted:    #8a95a3;

    --sidebar-w:     210px;
    --navbar-h:      44px;
    --radius:        6px;
    --radius-sm:     4px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.10);
}

/* ─── RESET & BASE ─────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    font-size: 13px;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* ─── TOP NAVBAR ───────────────────────────── */
.top-navbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-w);
    right: 0;
    height: var(--navbar-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 200;
    display: flex;
    align-items: center;
    padding: 0 16px;
    box-shadow: var(--shadow-sm);
}

/* ─── SIDEBAR ──────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--surface);
    border-right: 1px solid var(--border);
    z-index: 300;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    padding: 0 14px;
    height: var(--navbar-h);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
    gap: 8px;
    text-decoration: none;
    background: var(--surface);
}

.sidebar-logo img {
    height: 30px;
    width: auto;
    object-fit: contain;
}

.sidebar-logo-text {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.2px;
}

.sidebar-sticky {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 6px 0;
}

.sidebar-sticky::-webkit-scrollbar { width: 3px; }
.sidebar-sticky::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    margin: 1px 6px;
    border-radius: var(--radius-sm);
    font-size: 12.5px;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    transition: background 0.12s, color 0.12s;
    position: relative;
    white-space: nowrap;
}

.sidebar .nav-link i {
    width: 15px;
    margin-right: 9px;
    font-size: 12px;
    color: var(--text-muted);
    flex-shrink: 0;
    text-align: center;
}

.sidebar .nav-link:hover {
    background: var(--bg);
    color: var(--text-primary);
}
.sidebar .nav-link:hover i { color: var(--text-secondary); }

.sidebar .nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}
.sidebar .nav-link.active i { color: var(--primary); }
.sidebar .nav-link.active::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 4px; bottom: 4px;
    width: 3px;
    background: var(--primary);
    border-radius: 0 2px 2px 0;
}

.sidebar-section-label {
    font-size: 10px !important;
    font-weight: 700 !important;
    color: var(--text-muted) !important;
    text-transform: uppercase !important;
    letter-spacing: 0.08em !important;
    padding: 10px 18px 3px !important;
}

/* ─── MAIN CONTENT ─────────────────────────── */
.main-content {
    margin-left: var(--sidebar-w);
    padding-top: calc(var(--navbar-h) + 16px);
    padding-left: 20px;
    padding-right: 20px;
    padding-bottom: 24px;
    min-height: 100vh;
}

/* ─── PAGE HEADER ──────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.page-header h1 {
    font-size: 15px !important;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-header h1 i { font-size: 14px; }

/* ─── CARDS ────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    box-shadow: var(--shadow-sm) !important;
}

.card-header {
    padding: 10px 14px !important;
    background: #fafbfc !important;
    border-bottom: 1px solid var(--border-light) !important;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-secondary);
}

.card-body { padding: 14px !important; }
.card-footer { padding: 10px 14px !important; }

/* ─── KPI CARDS ────────────────────────────── */
.kpi-card {
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: box-shadow 0.15s, transform 0.15s;
    background: var(--surface) !important;
    padding: 0 !important;
}

.kpi-card:hover {
    box-shadow: var(--shadow-md) !important;
    transform: translateY(-2px);
}

.kpi-card .card-body { padding: 14px 16px !important; }

.kpi-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.bg-light-green  { background: var(--primary-light); color: var(--primary); }
.bg-light-blue   { background: var(--accent-light);  color: var(--accent); }
.bg-light-purple { background: var(--purple-light);  color: var(--purple); }
.bg-light-orange { background: var(--danger-light);  color: var(--danger); }

/* ─── FORM CONTROLS (ENTERPRISE COMPACT) ───── */
.form-control,
.form-select {
    font-size: 12.5px !important;
    padding: 5px 9px !important;
    height: 30px !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--text-primary) !important;
    background: var(--surface) !important;
    box-shadow: none !important;
    transition: border-color 0.12s, box-shadow 0.12s !important;
    line-height: 1.4 !important;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px rgba(15,92,168,0.12) !important;
    outline: none !important;
}

textarea.form-control {
    height: auto !important;
    resize: vertical;
}

.form-label {
    font-size: 11.5px !important;
    font-weight: 600 !important;
    color: var(--text-secondary) !important;
    margin-bottom: 3px !important;
    display: block;
}

.input-group .form-control { border-radius: 0 !important; }
.input-group > *:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important; }
.input-group > *:last-child  { border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important; }

.input-group-text {
    font-size: 12px !important;
    padding: 4px 9px !important;
    background: var(--bg) !important;
    border-color: var(--border) !important;
    color: var(--text-muted) !important;
}

/* ─── BUTTONS ──────────────────────────────── */
.btn {
    font-size: 12.5px !important;
    font-weight: 500 !important;
    padding: 5px 12px !important;
    border-radius: var(--radius-sm) !important;
    line-height: 1.4 !important;
    transition: all 0.12s !important;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-sm {
    font-size: 11.5px !important;
    padding: 3px 9px !important;
}

.btn-lg {
    font-size: 13px !important;
    padding: 8px 16px !important;
}

.btn-primary {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}
.btn-primary:hover { background: var(--primary-dark) !important; border-color: var(--primary-dark) !important; }

.btn-danger  { background: var(--danger) !important; border-color: var(--danger) !important; color: #fff !important; }
.btn-danger:hover  { background: #a93226 !important; border-color: #a93226 !important; }

.btn-success { background: #1e8449 !important; border-color: #1e8449 !important; color: #fff !important; }
.btn-success:hover { background: #196639 !important; border-color: #196639 !important; }

.btn-outline-secondary {
    color: var(--text-secondary) !important;
    border-color: var(--border) !important;
    background: transparent !important;
}
.btn-outline-secondary:hover { background: var(--bg) !important; color: var(--text-primary) !important; }

.btn-outline-danger { color: var(--danger) !important; border-color: var(--danger) !important; background: transparent !important; }
.btn-outline-danger:hover { background: var(--danger-light) !important; }

.btn-outline-info { color: var(--accent) !important; border-color: var(--accent) !important; background: transparent !important; }
.btn-outline-info:hover { background: var(--accent-light) !important; }

.btn-outline-success { color: #1e8449 !important; border-color: #1e8449 !important; background: transparent !important; }
.btn-outline-success:hover { background: var(--primary-light) !important; }

/* ─── TABLES ───────────────────────────────── */
.table {
    font-size: 12.5px !important;
    margin-bottom: 0 !important;
}

.table thead th {
    font-size: 11.5px !important;
    font-weight: 700 !important;
    color: var(--text-muted) !important;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: #fafbfc !important;
    border-bottom: 1px solid var(--border) !important;
    padding: 8px 12px !important;
    white-space: nowrap;
}

.table td {
    padding: 7px 12px !important;
    vertical-align: middle !important;
    border-color: var(--border-light) !important;
    color: var(--text-primary) !important;
}

.table-hover tbody tr:hover { background: var(--bg) !important; }
.table-striped > tbody > tr:nth-of-type(odd) > * { background-color: rgba(0,0,0,0.018) !important; }

.table-custom {
    background: var(--surface);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    overflow: hidden;
}

.table-custom thead th {
    background: #fafbfc !important;
}

/* ─── BADGES ───────────────────────────────── */
.badge {
    font-size: 10.5px !important;
    font-weight: 600 !important;
    padding: 2px 7px !important;
    border-radius: 20px !important;
}

/* ─── ALERTS ───────────────────────────────── */
.alert {
    font-size: 12.5px !important;
    padding: 9px 14px !important;
    border-radius: var(--radius-sm) !important;
    border: 1px solid !important;
}

.alert-success { background: var(--primary-light) !important; border-color: #a3d9b8 !important; color: var(--primary-dark) !important; }
.alert-danger  { background: var(--danger-light)  !important; border-color: #f0b8b3 !important; color: var(--danger) !important; }

/* ─── DATATABLES OVERRIDE ──────────────────── */
.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    font-size: 12px !important;
    padding: 4px 8px !important;
    height: 28px !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
}

.dataTables_wrapper .dataTables_filter,
.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_paginate {
    padding: 8px 14px !important;
    font-size: 12px !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    font-size: 12px !important;
    padding: 2px 7px !important;
}

/* ─── UTILITY ──────────────────────────────── */
.text-xs { font-size: 11px; }
.text-sm  { font-size: 12px; }
.gap-2    { gap: 6px !important; }

/* ─── PAGE LOADER ──────────────────────────── */
#page-loader {
    display: none;
    position: fixed;
    top: 0; left: var(--sidebar-w); right: 0; bottom: 0;
    z-index: 9999;
    background: rgba(240,242,245,0.75);
    backdrop-filter: blur(2px);
}

#page-loader.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    animation: loaderFadeIn 0.1s ease;
}

@keyframes loaderFadeIn { from{opacity:0} to{opacity:1} }

#page-loader .loader-bar-track {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: transparent;
    overflow: hidden;
}

#page-loader .loader-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, #2ecc71 50%, var(--primary) 100%);
    background-size: 200% 100%;
    animation: loaderBarSlide 0.7s cubic-bezier(0.4,0,0.2,1) forwards,
               loaderBarShimmer 0.7s linear infinite;
}

@keyframes loaderBarSlide { 0%{width:0%} 60%{width:75%} 100%{width:100%} }
@keyframes loaderBarShimmer { 0%{background-position:200% center} 100%{background-position:-200% center} }

#page-loader .loader-spinner {
    width: 28px; height: 28px;
    border: 2.5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: loaderSpin 0.65s linear infinite;
}

@keyframes loaderSpin { to{transform:rotate(360deg)} }

#page-loader .loader-text {
    margin-top: 10px;
    font-size: 11.5px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ─── PRINT ────────────────────────────────── */
@media print {
    @page { size: A4; margin: 15mm; }
    body { background: #fff; margin: 0; padding: 0; }
    .sidebar, .top-navbar, .no-print { display: none !important; }
    .main-content { margin-left: 0 !important; padding: 0 !important; width: 100% !important; }
    .invoice-box { box-shadow: none !important; border: none !important; padding: 0 !important; max-width: 100% !important; width: 100% !important; }
    .container-fluid { padding: 0 !important; margin: 0 !important; }
}

/* ─── RESPONSIVE ───────────────────────────── */
@media (max-width: 767.98px) {
    .sidebar { transform: translateX(-100%); transition: transform 0.2s ease; }
    .sidebar.show { transform: translateX(0); }
    .main-content { margin-left: 0; padding-top: calc(var(--navbar-h) + 12px); }
    .top-navbar { left: 0; }
}