/* ==============================================
   SIDEBAR NAVIGATION
   ============================================== */
.sidebar {
    border-right: 1px solid var(--glass-border);
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--bg-surface);
    transition: transform var(--transition);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

body.sidebar-collapsed .sidebar {
    transform: translateX(-100%);
}

.sidebar.open,
body .sidebar.open,
body.sidebar-collapsed .sidebar.open {
    transform: translateX(0) !important;
}

.sidebar-header {
    border-bottom: 1px solid var(--glass-border);
    padding: 24px 20px;
    display: flex;
    flex-shrink: 0;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.sidebar-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.sidebar-header img {
    width: 36px;
    height: 36px;
}

.sidebar-brand {
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: 0.5px;
    color: var(--text-heading);
}

.sidebar-brand span.brand-text {
    text-shadow: var(--glow-xxs);
}

.sidebar-brand span.brand-accent {
    margin-left: 2px;
    padding: 0 5px;
    border-radius: 4px;
    color: var(--bg-deep);
    text-shadow: var(--glow-xs);
    background: var(--neon-primary);
    filter: drop-shadow(0 0 8px color-mix(in srgb, var(--neon-primary) 35%, transparent));
}

.sidebar-nav {
    padding: 16px 12px;
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-link {
    border: 1px solid transparent;
    padding: 12px 14px;
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
    font-weight: 500;
    font-size: 0.92rem;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all var(--transition);
}

.nav-link::before {
    width: 3px;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--neon-primary);
    box-shadow: var(--glow-sm);
    opacity: 0;
    transition: opacity var(--transition);
    content: '';
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.nav-link.active {
    border-color: color-mix(in srgb, var(--neon-primary) 20%, transparent);
    color: var(--neon-primary);
    text-shadow: var(--glow-xs);
    background: color-mix(in srgb, var(--neon-primary) 8%, transparent);
}

.nav-link.active::before {
    opacity: 1;
}

.nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

img.nav-icon {
    object-fit: contain;
}

span.nav-icon {
    font-size: 1.4rem;
}

/* ==============================================
   MENU TOGGLE BUTTON
   ============================================== */
.menu-toggle {
    border: 1px solid color-mix(in srgb, var(--neon-primary) 30%, transparent);
    width: 42px;
    height: 42px;
    position: fixed;
    top: 25px;
    left: 25px;
    z-index: 1200;
    display: none;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    color: var(--neon-primary);
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    box-shadow: var(--glow-xs);
    opacity: 0.75;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.menu-toggle:hover {
    border-color: var(--neon-primary);
    transform: scale(1.05);
    background: var(--bg-surface-light);
    box-shadow: var(--glow-sm);
    opacity: 1;
}

.menu-toggle.active {
    opacity: 0;
    pointer-events: none;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    z-index: 1900;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* ==============================================
   MEDIA QUERIES
   ============================================== */
@media (max-width: 1024px) {
    .sidebar {
        z-index: 2000;
        transform: translateX(-100%);
    }

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

    .sidebar-overlay.active {
        z-index: 1900;
        visibility: visible;
        pointer-events: auto;
    }

    .menu-toggle {
        display: flex !important;
    }
}