/* ============================================================
   1. CSS Custom Properties (Design Tokens)
   ============================================================ */

:root {
    /* Brand gradient (navbar brand, OSTicket form headers) */
    --primary: #4361ee;
    --secondary: #7209b7;
    --gray-800: #343a40;

    /* BPP app shell */
    --bpp-navy: #00245a;
    --bpp-navy-hover: #003580;
    --bpp-accent: #0d6efd;
    --bpp-sidebar-bg: #dde3e9;
    --bpp-content-bg: #e8edf2;
    --bpp-card-bg: #ffffff;
    --bpp-border: #c6cfd8;
    --bpp-overdue: #dc3545;
    --bpp-due-today: #fd7e14;
    --bpp-upcoming: #0dcaf0;
    --bpp-complete: #198754;
}

/* ============================================================
   2. Base Reset
   ============================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ============================================================
   3. Layout — Body
   ============================================================ */

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #f8f9fa 100%);
    background-color: var(--bpp-content-bg);
    color: var(--gray-800);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================
   4. Navbar Brand
   ============================================================ */

.navbar-brand {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ============================================================
   5. Utilities — Focus Ring
   ============================================================ */

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

/* ============================================================
   6. BPP App Shell — Sidebar Layout
   ============================================================ */

.bpp-navbar {
    background-color: var(--bpp-navy);
    height: 56px;
}

.bpp-sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 220px;
    background-color: var(--bpp-sidebar-bg);
    border-right: 1px solid var(--bpp-border);
    z-index: 1020;
    overflow-y: auto;
}

.bpp-sidebar .nav-link {
    color: #343a40;
    padding: .5rem 1.25rem;
    font-size: .9rem;
    border-radius: 0;
    display: block;
    text-decoration: none;
}

.bpp-sidebar .nav-link:hover {
    background-color: #cfd7de;
    color: var(--bpp-navy);
}

.bpp-sidebar .nav-link.active {
    background-color: #cfe2ff;
    color: var(--bpp-accent);
    font-weight: 600;
    border-left: 3px solid var(--bpp-accent);
}

.bpp-sidebar .nav-section-label {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #6c757d;
}

.content-wrapper {
    margin-left: 220px;
    padding-top: 56px;
    min-height: 100vh;
}

@media (max-width: 991.98px) {
    .bpp-sidebar {
        display: none;
    }

    .content-wrapper {
        margin-left: 0;
    }
}