/* ==========================================================
   QuickBill — App Shell (sidebar + topbar)
   Depends on tokens defined in Variables.css
   ========================================================== */

:root {
    --qb-sidebar-w: 264px;
    --qb-topbar-h: 68px;
    --qb-sidebar-bg: #0f172a;
    --qb-sidebar-bg-active: #1e293b;
    --qb-sidebar-text: #94a3b8;
    --qb-sidebar-text-active: #ffffff;
}

/* ---------- Layout shell ---------- */

.qb-shell-layout {
    display: flex;
    min-height: 100vh;
}

.qb-main-wrap {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    min-width: 0;
    margin-left: var(--qb-sidebar-w);
    transition: margin-left .22s ease;
}

/* ---------- Sidebar ---------- */

.qb-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1030;
    display: flex;
    flex-direction: column;
    width: var(--qb-sidebar-w);
    background: var(--qb-sidebar-bg);
    border-right: 1px solid rgba(255, 255, 255, .06);
    overflow-y: auto;
    transition: transform .22s ease;
}

    .qb-sidebar::-webkit-scrollbar {
        width: 6px;
    }

    .qb-sidebar::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, .12);
        border-radius: 6px;
    }

.qb-sidebar-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--qb-topbar-h);
    padding: 0 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, .06);
}

.qb-sidebar .qb-brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
}

    .qb-sidebar .qb-brand > span:last-child span {
        color: #60a5fa;
    }

.qb-brand-mark,
.qb-footer-icon {
    display: inline-grid;
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    place-items: center;
    color: #fff;
    background: var(--qb-primary);
    border-radius: 10px;
}

.qb-sidebar-close {
    display: none;
    width: 34px;
    height: 34px;
    color: #cbd5e1;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 8px;
}

.qb-sidebar-nav {
    flex: 1 1 auto;
    padding: 1rem .75rem;
}

.qb-nav-list {
    display: grid;
    gap: .2rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.qb-nav-item,
.qb-nav-group {
    position: relative;
}

.qb-nav-link {
    display: flex;
    align-items: center;
    width: 100%;
    gap: .75rem;
    padding: .65rem .75rem;
    color: var(--qb-sidebar-text);
    font-weight: 500;
    font-size: .89rem;
    text-align: left;
    text-decoration: none;
    background: transparent;
    border: 0;
    border-radius: 9px;
    cursor: pointer;
    transition: background .16s ease, color .16s ease;
}

    .qb-nav-link i:first-child {
        width: 1.1rem;
        text-align: center;
        font-size: .95rem;
    }

    .qb-nav-link span {
        flex: 1 1 auto;
    }

    .qb-nav-link:hover,
    .qb-nav-link:focus-visible {
        color: var(--qb-sidebar-text-active);
        background: rgba(255, 255, 255, .07);
    }

.qb-nav-item > .qb-nav-link.active,
.qb-nav-submenu a.active {
    color: #fff;
    background: var(--qb-primary);
}

.qb-nav-caret {
    width: auto !important;
    font-size: .72rem !important;
    transition: transform .18s ease;
}

.qb-nav-toggle[aria-expanded="true"] .qb-nav-caret {
    transform: rotate(180deg);
}

.qb-nav-submenu {
    display: grid;
    gap: .1rem;
    max-height: 0;
    margin: 0 0 0 1.05rem;
    padding: 0;
    overflow: hidden;
    list-style: none;
    border-left: 1px solid rgba(255, 255, 255, .08);
    transition: max-height .22s ease;
}

    .qb-nav-submenu li {
        padding-left: .6rem;
    }

    .qb-nav-submenu a {
        display: flex;
        align-items: center;
        gap: .6rem;
        padding: .55rem .6rem;
        color: var(--qb-sidebar-text);
        font-size: .85rem;
        font-weight: 500;
        text-decoration: none;
        border-radius: 8px;
        transition: background .16s ease, color .16s ease;
    }

        .qb-nav-submenu a i {
            width: 1rem;
            font-size: .82rem;
            text-align: center;
        }

        .qb-nav-submenu a:hover {
            color: #fff;
            background: rgba(255, 255, 255, .07);
        }

.qb-nav-group.open > .qb-nav-submenu {
    max-height: 320px;
}

.qb-sidebar-foot {
    display: flex;
    align-items: center;
    gap: .7rem;
    padding: 1rem 1.1rem;
    color: #64748b;
    border-top: 1px solid rgba(255, 255, 255, .06);
}

    .qb-sidebar-foot strong {
        display: block;
        color: #e2e8f0;
        font-size: .85rem;
    }

    .qb-sidebar-foot small {
        font-size: .72rem;
    }

.qb-sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1020;
    display: none;
    background: rgba(15, 23, 42, .45);
    backdrop-filter: blur(1px);
}

/* ---------- Topbar ---------- */

.qb-topbar {
    position: sticky;
    top: 0;
    z-index: 1010;
    display: flex;
    align-items: center;
    gap: .9rem;
    height: var(--qb-topbar-h);
    padding: 0 1.5rem;
    background: var(--qb-surface);
    border-bottom: 1px solid var(--qb-border);
    box-shadow: 0 1px 0 rgba(15, 23, 42, .02);
}

.qb-menu-toggle {
    display: none;
    width: 38px;
    height: 38px;
    color: #334155;
    background: var(--qb-surface-muted);
    border: 1px solid var(--qb-border);
    border-radius: 9px;
    flex-shrink: 0;
}

.qb-topbar-search {
    flex: 1 1 auto;
    max-width: 420px;
}

    .qb-topbar-search input {
        width: 100%;
        height: 40px;
        padding: 0 .9rem 0 2.4rem;
        color: var(--qb-text);
        font-size: .88rem;
        background: var(--qb-surface-muted);
        border: 1px solid var(--qb-border);
        border-radius: var(--qb-radius-sm);
        outline: none;
        transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
    }

        .qb-topbar-search input:focus {
            background: var(--qb-surface);
            border-color: var(--qb-primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

.qb-topbar-actions {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin-left: auto;
}

.qb-icon-btn {
    display: inline-grid;
    width: 40px;
    height: 40px;
    place-items: center;
    color: #475569;
    background: var(--qb-surface-muted);
    border: 1px solid var(--qb-border);
    border-radius: 10px;
    transition: background .16s ease, color .16s ease;
}

    .qb-icon-btn:hover {
        color: var(--qb-primary);
        background: var(--qb-primary-soft);
    }

.qb-user-button {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .3rem .55rem .3rem .3rem;
    text-decoration: none;
    border-radius: 12px;
    transition: background .16s ease;
}

    .qb-user-button:hover {
        background: var(--qb-surface-muted);
    }

    .qb-user-button small {
        display: block;
        color: #94a3b8;
        font-size: .67rem;
    }

.qb-user-meta {
    flex-direction: column;
    line-height: 1.2;
    text-align: left;
}

.qb-user-name {
    color: var(--qb-text);
    font-size: .84rem;
    font-weight: 600;
}

.qb-user-caret {
    font-size: .7rem;
    color: #94a3b8;
}

.qb-avatar {
    display: inline-grid;
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    place-items: center;
    color: var(--qb-primary);
    background: #dbeafe;
    border-radius: 50%;
}

.qb-avatar-lg {
    width: 44px;
    height: 44px;
}

.qb-dropdown {
    min-width: 235px;
    padding: .45rem;
    border: 1px solid var(--qb-border);
    border-radius: 12px;
    box-shadow: var(--qb-shadow-lg);
}

.qb-profile-menu {
    min-width: 260px;
}

.qb-profile-summary {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .7rem;
}

    .qb-profile-summary strong,
    .qb-profile-summary small {
        display: block;
    }

    .qb-profile-summary small {
        color: var(--qb-muted);
        font-size: .8rem;
    }

.qb-danger-link,
.qb-danger-link i {
    color: var(--qb-danger) !important;
}

/* ---------- Content ---------- */

.qb-content {
    flex: 1 1 auto;
    padding: 1.5rem 1.75rem 2rem;
}

.qb-page-alert {
    margin-bottom: 1rem;
}

.qb-breadcrumb-wrap {
    margin-bottom: 1rem;
}

.qb-footer {
    padding: .9rem 1.75rem;
    color: var(--qb-muted);
    background: var(--qb-surface);
    border-top: 1px solid var(--qb-border);
}

    .qb-footer small {
        font-size: .78rem;
    }

/* ---------- Responsive ---------- */

@media (max-width: 991.98px) {
    .qb-main-wrap {
        margin-left: 0;
    }

    .qb-sidebar {
        transform: translateX(-100%);
        box-shadow: var(--qb-shadow-lg);
    }

    .qb-sidebar-close {
        display: inline-grid;
        place-items: center;
    }

    body.qb-sidebar-open .qb-sidebar {
        transform: translateX(0);
    }

    body.qb-sidebar-open .qb-sidebar-backdrop {
        display: block;
    }

    .qb-menu-toggle {
        display: inline-grid;
        place-items: center;
    }
}

@media (max-width: 575.98px) {
    .qb-topbar-search {
        display: none;
    }

    .qb-content {
        padding: 1rem 1rem 1.5rem;
    }

    .qb-topbar {
        padding: 0 1rem;
    }
}

@media print {
    .qb-sidebar,
    .qb-topbar,
    .qb-footer,
    .qb-sidebar-backdrop {
        display: none !important;
    }

    .qb-main-wrap {
        margin-left: 0 !important;
    }
}