:root {
    --sidebar-width-collapsed: 64px;
    --sidebar-width-expanded: 200px;
    --sidebar-top-offset: 80px;
    --sidebar-bottom-offset: 24px;
    --sidebar-left-offset: 16px;
    --sidebar-radius: 18px;
    --sidebar-padding: 12px;
    --sidebar-gap: 10px;
    --sidebar-bg: #1e2024;
    --sidebar-border: rgba(255, 255, 255, 0.08);
    --sidebar-border-width: 1px;
    --sidebar-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
    --sidebar-item-radius: 14px;
    --sidebar-item-padding: 10px;
    --sidebar-item-gap: 12px;
    --sidebar-item-gap-collapsed: 0px;
    --sidebar-item-bg: rgba(255, 255, 255, 0.04);
    --sidebar-item-border: rgba(255, 255, 255, 0.06);
    --sidebar-item-border-width: 1px;
    --sidebar-item-hover-bg: rgba(251, 191, 36, 0.12);
    --sidebar-item-hover-border: rgba(251, 191, 36, 0.3);
    --sidebar-item-hover-glow: 0 0 18px rgba(251, 191, 36, 0.25);
    --sidebar-item-hover-scale: 1.03;
    --sidebar-item-press-scale: 0.98;
    --sidebar-icon-size: 22px;
    --sidebar-icon-hover-scale: 1.1;
    --sidebar-avatar-size: 30px;
    --sidebar-label-size: 14px;
    --sidebar-label-color: rgba(255, 255, 255, 0.85);
    --sidebar-label-max: 160px;
    --sidebar-accent: #fbbf24;
    --sidebar-indicator-width: 4px;
    --sidebar-indicator-offset: -6px;
    --sidebar-divider: rgba(255, 255, 255, 0.08);
    --sidebar-transition: 0.35s;
    --sidebar-ease: cubic-bezier(0.34, 1.56, 0.64, 1);
    --sidebar-content-offset: calc(var(--sidebar-width-expanded) + 32px);
    --sidebar-badge-size: 18px;
    --sidebar-badge-bg: #ef4444;
    --sidebar-badge-color: #fff;
    --sidebar-badge-border: #1e2024;
    --sidebar-badge-border-width: 2px;
    --sidebar-badge-radius: 999px;
    --sidebar-badge-font-size: 11px;
    --sidebar-badge-padding-x: 5px;
    --sidebar-badge-offset: -6px;
    --sidebar-badge-pulse: 1.5s;
    --sidebar-badge-pulse-scale: 1.12;
    --sidebar-logout-color: #ef4444;
    --sidebar-logout-bg: rgba(239, 68, 68, 0.12);
    --sidebar-logout-border: rgba(239, 68, 68, 0.28);
    --sidebar-logout-hover-bg: rgba(239, 68, 68, 0.2);
    --sidebar-logout-hover-border: rgba(239, 68, 68, 0.5);
    --sidebar-logout-hover-glow: 0 0 18px rgba(239, 68, 68, 0.25);
    --sidebar-z: 998;
}

.site-sidebar {
    position: fixed;
    top: var(--sidebar-top-offset);
    left: var(--sidebar-left-offset);
    bottom: var(--sidebar-bottom-offset);
    width: var(--sidebar-width-collapsed);
    background: var(--sidebar-bg);
    border: var(--sidebar-border-width) solid var(--sidebar-border);
    border-radius: var(--sidebar-radius);
    padding: var(--sidebar-padding);
    display: flex;
    flex-direction: column;
    gap: var(--sidebar-gap);
    z-index: var(--sidebar-z);
    transition: width var(--sidebar-transition) var(--sidebar-ease),
        box-shadow var(--sidebar-transition) var(--sidebar-ease);
}

.site-sidebar:hover,
.site-sidebar:focus-within {
    width: var(--sidebar-width-expanded);
    box-shadow: var(--sidebar-shadow);
}

.site-sidebar-inner {
    display: flex;
    flex-direction: column;
    gap: var(--sidebar-gap);
    height: 100%;
}

.sidebar-item {
    position: relative;
    width: 100%;
    border: var(--sidebar-item-border-width) solid var(--sidebar-item-border);
    background: var(--sidebar-item-bg);
    border-radius: var(--sidebar-item-radius);
    padding: var(--sidebar-item-padding);
    display: flex;
    align-items: center;
    gap: var(--sidebar-item-gap);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    cursor: pointer;
    font: inherit;
    appearance: none;
    outline: none;
    transition: transform var(--sidebar-transition) var(--sidebar-ease),
        border-color var(--sidebar-transition) var(--sidebar-ease),
        background var(--sidebar-transition) var(--sidebar-ease),
        box-shadow var(--sidebar-transition) var(--sidebar-ease);
}

.sidebar-item svg {
    width: var(--sidebar-icon-size);
    height: var(--sidebar-icon-size);
    transition: transform var(--sidebar-transition) var(--sidebar-ease);
}

.sidebar-item:hover {
    background: var(--sidebar-item-hover-bg);
    border-color: var(--sidebar-item-hover-border);
    box-shadow: var(--sidebar-item-hover-glow);
    transform: scale(var(--sidebar-item-hover-scale));
    color: #fff;
}

.sidebar-item:hover svg {
    transform: scale(var(--sidebar-icon-hover-scale));
}

.sidebar-item:active {
    transform: scale(var(--sidebar-item-press-scale));
}

.sidebar-item.is-active {
    background: var(--sidebar-item-hover-bg);
    border-color: var(--sidebar-item-hover-border);
    color: #fff;
    box-shadow: var(--sidebar-item-hover-glow);
}

.sidebar-item.is-active::before {
    content: "";
    position: absolute;
    left: var(--sidebar-indicator-offset);
    top: 50%;
    transform: translateY(-50%);
    width: var(--sidebar-indicator-width);
    height: 60%;
    border-radius: 999px;
    background: var(--sidebar-accent);
}

.sidebar-item.is-disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.sidebar-icon {
    position: relative;
    width: var(--sidebar-icon-size);
    height: var(--sidebar-icon-size);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-avatar {
    width: var(--sidebar-avatar-size);
    height: var(--sidebar-avatar-size);
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(251, 191, 36, 0.4);
}

.sidebar-label {
    font-size: var(--sidebar-label-size);
    font-weight: 600;
    color: var(--sidebar-label-color);
    opacity: 0;
    max-width: 0;
    white-space: nowrap;
    overflow: hidden;
    transform: translateX(-6px);
    transition: opacity var(--sidebar-transition) var(--sidebar-ease),
        transform var(--sidebar-transition) var(--sidebar-ease),
        max-width var(--sidebar-transition) var(--sidebar-ease);
}

.site-sidebar:hover .sidebar-label,
.site-sidebar:focus-within .sidebar-label {
    opacity: 1;
    max-width: var(--sidebar-label-max);
    transform: translateX(0);
}

.site-sidebar:not(:hover):not(:focus-within) .sidebar-item {
    justify-content: center;
    gap: var(--sidebar-item-gap-collapsed);
}

.notification_badge.sidebar-badge {
    position: absolute;
    top: var(--sidebar-badge-offset);
    right: var(--sidebar-badge-offset);
    min-width: var(--sidebar-badge-size);
    height: var(--sidebar-badge-size);
    padding: 0 var(--sidebar-badge-padding-x);
    background: var(--sidebar-badge-bg);
    color: var(--sidebar-badge-color);
    border-radius: var(--sidebar-badge-radius);
    font-size: var(--sidebar-badge-font-size);
    font-weight: 700;
    border: var(--sidebar-badge-border-width) solid var(--sidebar-badge-border);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: sidebarBadgePulse var(--sidebar-badge-pulse) ease-in-out infinite;
}

@keyframes sidebarBadgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(var(--sidebar-badge-pulse-scale)); }
}

.sidebar-divider {
    height: 1px;
    background: var(--sidebar-divider);
    margin: 6px 0;
}

.sidebar-spacer {
    flex: 1;
}

.sidebar-item.logout {
    background: var(--sidebar-logout-bg);
    border-color: var(--sidebar-logout-border);
    color: var(--sidebar-logout-color);
}

.sidebar-item.logout:hover {
    background: var(--sidebar-logout-hover-bg);
    border-color: var(--sidebar-logout-hover-border);
    box-shadow: var(--sidebar-logout-hover-glow);
}

@media (min-width: 768px) {
    body .site-sidebar ~ main,
    body .site-sidebar ~ .main_content {
        margin-left: 0;
    }
}

@media (max-width: 767.98px) {
    .site-sidebar {
        display: none;
    }
}

@media (min-width: 768px) {
    .site-sidebar {
        display: none;
    }
}