:root {
    --color-bg: #000000;
    --color-surface-low: #2B2B2B;
    --color-surface-high: #4A4A4A;
    --color-primary: #2F5EF5;
    --color-text: #FFFFFF;
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 60px;
    --navbar-height: 56px;
}

[data-bs-theme="dark"] {
    --bs-body-bg: var(--color-bg);
    --bs-body-color: var(--color-text);
    --bs-primary: var(--color-primary);
    --bs-primary-rgb: 47, 94, 245;
    --bs-link-color: var(--color-primary);
    --bs-link-hover-color: #5A80F7;
}

body {
    min-height: 100vh;
}

/* NAVBAR */
.navbar.fixed-top {
    z-index: 1030;
}

/* SIDEBAR */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background-color: var(--color-surface-low);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1020;
    transition: width 0.2s ease, transform 0.2s ease;
    transform: translateX(0);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar-nav {
    list-style: none;
    padding: 0.75rem 0;
    margin: 0;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    padding: 0.65rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.15s;
    gap: 0.75rem;
}

.sidebar-nav li a:hover {
    background-color: var(--color-surface-high);
}

.sidebar-nav li a.active {
    background-color: var(--color-primary);
    color: #fff;
}

.sidebar-nav li a i {
    font-size: 1.15rem;
    width: 24px;
    flex-shrink: 0;
    text-align: center;
}

.sidebar-nav li a span {
    overflow: hidden;
    transition: opacity 0.15s;
    opacity: 1;
}

.sidebar.collapsed .sidebar-nav li a span {
    opacity: 0;
    width: 0;
}

.sidebar.collapsed .sidebar-nav li a {
    justify-content: center;
    padding: 0.65rem 0;
}

.sidebar-header {
    padding: 1rem 1rem 0.25rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-surface-high);
    white-space: nowrap;
    overflow: hidden;
    transition: opacity 0.15s;
}

.sidebar.collapsed .sidebar-header {
    opacity: 0;
    height: 0;
    padding: 0;
    margin: 0;
}

.sidebar-divider {
    border-top: 1px solid var(--color-surface-high);
    margin: 0.5rem 1rem;
}

.sidebar.collapsed .sidebar-divider {
    margin: 0.5rem 0.5rem;
}

/* AUTH PAGES — VERTICAL CENTER */
.auth-center {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - var(--navbar-height) - 4rem);
    width: 100%;
}

.auth-card {
    width: 100%;
    max-width: 400px;
}

/* MAIN CONTENT */
main {
    padding-top: var(--navbar-height);
    padding-bottom: 56px;
    min-height: 100vh;
}

main.sidebar-active {
    margin-left: var(--sidebar-width);
    transition: margin-left 0.2s ease;
}

body.sidebar-collapsed main.sidebar-active {
    margin-left: var(--sidebar-collapsed-width);
}

/* FOOTER */
.main-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1019;
    text-align: center;
    padding: 0.5rem;
    font-size: 0.875rem;
    background-color: var(--color-surface-low);
    border-top: 1px solid var(--color-surface-high);
    color: var(--color-text);
}

main.sidebar-active + .main-footer {
    left: var(--sidebar-width);
    transition: left 0.2s ease;
}

body.sidebar-collapsed main.sidebar-active + .main-footer {
    left: var(--sidebar-collapsed-width);
}

@media (max-width: 991.98px) {
    main.sidebar-active + .main-footer {
        left: 0 !important;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }

    main.sidebar-active {
        margin-left: 0 !important;
    }
}