/* ===========================================================================
   NRS Stock — modern monochrome (charcoal/grey) admin dashboard theme.
   Built on Bootstrap 5. Layout: fixed top header + fixed charcoal sidebar +
   scrolling content area with card "panels".
   =========================================================================== */

:root {
    --nrs-sidebar-bg: #1f2329;
    --nrs-sidebar-bg-2: #191c21;
    --nrs-sidebar-fg: #c7ccd1;
    --nrs-sidebar-fg-muted: #8b9197;
    --nrs-sidebar-active: #2c313a;
    --nrs-header-bg: #ffffff;
    --nrs-accent: #2f3640;       /* near-black slate for primary actions */
    --nrs-accent-hover: #20262e;
    --nrs-body-bg: #f4f5f7;
    --nrs-border: #e4e7eb;
    --nrs-text: #2b2f36;
    --nrs-text-muted: #6b7280;
    --nrs-sidebar-width: 248px;
    --nrs-header-height: 60px;
}

html { font-size: 15px; position: relative; min-height: 100%; }

body {
    background: var(--nrs-body-bg);
    color: var(--nrs-text);
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* App shell */
.nrs-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nrs-header-height);
    background: var(--nrs-header-bg);
    border-bottom: 1px solid var(--nrs-border);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    z-index: 1030;
}

.nrs-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-weight: 700;
    letter-spacing: .3px;
    color: var(--nrs-text);
    text-decoration: none;
    width: var(--nrs-sidebar-width);
    padding-left: .25rem;
}
.nrs-brand .bi { font-size: 1.35rem; }

.nrs-sidebar {
    position: fixed;
    top: var(--nrs-header-height);
    bottom: 0; left: 0;
    width: var(--nrs-sidebar-width);
    background: var(--nrs-sidebar-bg);
    overflow-y: auto;
    z-index: 1020;
    padding: .75rem 0 2rem;
}

.nrs-content {
    margin-left: var(--nrs-sidebar-width);
    padding: calc(var(--nrs-header-height) + 1.25rem) 1.5rem 2rem;
    min-height: 100vh;
}

/* Sidebar nav */
.nrs-nav-section {
    color: var(--nrs-sidebar-fg-muted);
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    padding: 1rem 1.25rem .35rem;
}

.nrs-nav-link {
    display: flex;
    align-items: center;
    gap: .7rem;
    color: var(--nrs-sidebar-fg);
    padding: .6rem 1.25rem;
    text-decoration: none;
    font-size: .92rem;
    border-left: 3px solid transparent;
    transition: background .12s, color .12s, border-color .12s;
}
.nrs-nav-link .bi { font-size: 1.05rem; width: 1.25rem; text-align: center; color: var(--nrs-sidebar-fg-muted); }
.nrs-nav-link:hover { background: var(--nrs-sidebar-active); color: #fff; }
.nrs-nav-link:hover .bi { color: #fff; }
.nrs-nav-link.active {
    background: var(--nrs-sidebar-active);
    color: #fff;
    border-left-color: #fff;
}
.nrs-nav-link.active .bi { color: #fff; }

/* Header user area */
.nrs-header-user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: .65rem;
}
.nrs-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    background: var(--nrs-accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: .85rem;
}
.nrs-user-meta { line-height: 1.1; text-align: right; }
.nrs-user-meta .name { font-weight: 600; font-size: .85rem; }
.nrs-user-meta .role { font-size: .72rem; color: var(--nrs-text-muted); }

/* Panels (cards) */
.panel {
    background: #fff;
    border: 1px solid var(--nrs-border);
    border-radius: 10px;
    box-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
    margin-bottom: 1.25rem;
}
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--nrs-border);
}
.panel-title { font-size: 1rem; font-weight: 600; margin: 0; }
.panel-body { padding: 1.25rem; }
.panel-body.table-host { padding: .5rem 1.25rem 1rem; }

.page-title { font-size: 1.4rem; font-weight: 700; margin: 0 0 .25rem; }
.page-subtitle { color: var(--nrs-text-muted); margin: 0 0 1.25rem; font-size: .9rem; }

/* Buttons (monochrome primary) */
.btn-primary {
    --bs-btn-bg: var(--nrs-accent);
    --bs-btn-border-color: var(--nrs-accent);
    --bs-btn-hover-bg: var(--nrs-accent-hover);
    --bs-btn-hover-border-color: var(--nrs-accent-hover);
    --bs-btn-active-bg: var(--nrs-accent-hover);
    --bs-btn-active-border-color: var(--nrs-accent-hover);
}
a { color: var(--nrs-accent); }
a:hover { color: var(--nrs-accent-hover); }

/* Status badges */
.badge-issued { background: #fef3c7; color: #92400e; }
.badge-submitted { background: #dbeafe; color: #1e40af; }
.badge-closed { background: #dcfce7; color: #166534; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-inactive { background: #f1f3f5; color: #6b7280; }

/* DataTables polish */
table.dataTable thead th {
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--nrs-text-muted);
    border-bottom: 2px solid var(--nrs-border) !important;
}
table.dataTable tbody td { vertical-align: middle; }
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--nrs-border);
    border-radius: 6px;
    padding: .3rem .6rem;
}
/* The length menu select needs room for the native dropdown arrow so the number isn't overlapped. */
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--nrs-border);
    border-radius: 6px;
    min-width: 72px;
    padding: .3rem 1.9rem .3rem .6rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236b7280'%3e%3cpath d='M8 11L3 6h10z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .55rem center;
    background-size: 12px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter { margin-bottom: .5rem; }
.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--nrs-accent) !important;
    border-color: var(--nrs-accent) !important;
    color: #fff !important;
}

/* Dashboard stat cards */
.nrs-stat-icon {
    width: 46px; height: 46px;
    border-radius: 10px;
    background: var(--nrs-body-bg);
    color: var(--nrs-accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex: 0 0 auto;
}
.nrs-stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1; color: var(--nrs-text); }
.nrs-stat-label { font-size: .82rem; color: var(--nrs-text-muted); margin-top: .2rem; }
.panel a:hover .nrs-stat-icon, a:hover > .panel .nrs-stat-icon { background: var(--nrs-accent); color: #fff; }
a:hover > .panel { border-color: var(--nrs-accent); }

/* Auth (login) page */
.nrs-auth {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, #1f2329 0%, #2c313a 100%);
}
.nrs-auth-card {
    width: 100%;
    max-width: 410px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
    padding: 2.25rem 2rem;
}
.nrs-auth-brand {
    text-align: center;
    margin-bottom: 1.5rem;
}
.nrs-auth-brand .icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--nrs-accent);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: .75rem;
}
.nrs-auth-brand h1 { font-size: 1.3rem; font-weight: 700; margin: 0; }
.nrs-auth-brand p { color: var(--nrs-text-muted); font-size: .85rem; margin: .15rem 0 0; }
.nrs-auth-card .form-label { font-weight: 600; font-size: .85rem; }

/* Footer */
.nrs-footer {
    margin-left: var(--nrs-sidebar-width);
    padding: 1rem 1.5rem;
    color: var(--nrs-text-muted);
    font-size: .8rem;
    border-top: 1px solid var(--nrs-border);
    background: #fff;
}

/* Sidebar collapsed (small screens) */
@media (max-width: 991.98px) {
    .nrs-sidebar { transform: translateX(-100%); transition: transform .2s; }
    .nrs-sidebar.show { transform: translateX(0); }
    .nrs-content, .nrs-footer { margin-left: 0; }
    .nrs-brand { width: auto; }
}

.btn:focus, .btn:active:focus, .form-control:focus, .form-check-input:focus, .form-select:focus {
    box-shadow: 0 0 0 0.2rem rgba(47, 54, 64, .15);
    border-color: var(--nrs-accent);
}