:root {
    --sidebar-width: 240px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #3b82f6;
    --topbar-height: 56px;
}

body { background-color: #f1f5f9; }

#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease;
}

#sidebar .sidebar-brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 1.25rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid #334155;
    letter-spacing: 0.05em;
}

#sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.6rem 1.25rem;
    border-radius: 0.375rem;
    margin: 2px 8px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

#sidebar .nav-link:hover,
#sidebar .nav-link.active {
    background: var(--sidebar-active);
    color: #fff;
}

#sidebar .nav-section {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
    padding: 1rem 1.25rem 0.25rem;
}

#sidebar .sidebar-footer {
    margin-top: auto;
    border-top: 1px solid #334155;
    padding: 0.75rem 0;
}

#topbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 1030;
    gap: 1rem;
}

#main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: 1.5rem;
    min-height: calc(100vh - var(--topbar-height));
}

#sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1035;
}

@media (max-width: 767.98px) {
    #sidebar { transform: translateX(-100%); }
    #sidebar.show { transform: translateX(0); }
    #sidebar-overlay.show { display: block; }
    #topbar { left: 0; }
    #main-content { margin-left: 0; }
}

input[type="text"].uppercase,
input:not([type]).uppercase,
textarea.uppercase {
    text-transform: uppercase;
}

.topbar-search {
    width: min(420px, 100%);
}

.breadcrumb-shell {
    margin-bottom: 1rem;
}

.breadcrumb-shell .breadcrumb {
    margin-bottom: 0;
    background: transparent;
    padding: 0;
}

.alert-soft {
    border: 0;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}